diff options
| -rw-r--r-- | src/sqlite/sqlite3.c | 7476 | ||||
| -rw-r--r-- | src/sqlite/sqlite3.h | 439 |
2 files changed, 5315 insertions, 2600 deletions
diff --git a/src/sqlite/sqlite3.c b/src/sqlite/sqlite3.c index c6595fe36..2c426c21e 100644 --- a/src/sqlite/sqlite3.c +++ b/src/sqlite/sqlite3.c @@ -1,6 +1,6 @@ /****************************************************************************** ** This file is an amalgamation of many separate C source files from SQLite -** version 3.7.6.3. By combining all the individual C code files into this +** version 3.7.7.1. By combining all the individual C code files into this ** single large file, the entire code can be compiled as a single translation ** unit. This allows many compilers to do optimizations that would not be ** possible if the files were compiled separately. Performance improvements @@ -650,9 +650,9 @@ extern "C" { ** [sqlite3_libversion_number()], [sqlite3_sourceid()], ** [sqlite_version()] and [sqlite_source_id()]. */ -#define SQLITE_VERSION "3.7.6.3" -#define SQLITE_VERSION_NUMBER 3007006 -#define SQLITE_SOURCE_ID "2011-05-19 13:26:54 ed1da510a239ea767a01dc332b667119fa3c908e" +#define SQLITE_VERSION "3.7.7.1" +#define SQLITE_VERSION_NUMBER 3007007 +#define SQLITE_SOURCE_ID "2011-06-28 17:39:05 af0d91adf497f5f36ec3813f04235a6e195a605f" /* ** CAPI3REF: Run-Time Library Version Numbers @@ -853,7 +853,7 @@ typedef int (*sqlite3_callback)(void*,int,char**, char**); ** argument. ^If the callback function of the 3rd argument to ** sqlite3_exec() is not NULL, then it is invoked for each result row ** coming out of the evaluated SQL statements. ^The 4th argument to -** to sqlite3_exec() is relayed through to the 1st argument of each +** sqlite3_exec() is relayed through to the 1st argument of each ** callback invocation. ^If the callback pointer to sqlite3_exec() ** is NULL, then no callback is ever invoked and result rows are ** ignored. @@ -918,7 +918,8 @@ SQLITE_API int sqlite3_exec( ** ** New error codes may be added in future versions of SQLite. ** -** See also: [SQLITE_IOERR_READ | extended result codes] +** See also: [SQLITE_IOERR_READ | extended result codes], +** [sqlite3_vtab_on_conflict()] [SQLITE_ROLLBACK | result codes]. */ #define SQLITE_OK 0 /* Successful result */ /* beginning-of-error-codes */ @@ -995,17 +996,21 @@ SQLITE_API int sqlite3_exec( #define SQLITE_IOERR_SHMOPEN (SQLITE_IOERR | (18<<8)) #define SQLITE_IOERR_SHMSIZE (SQLITE_IOERR | (19<<8)) #define SQLITE_IOERR_SHMLOCK (SQLITE_IOERR | (20<<8)) +#define SQLITE_IOERR_SHMMAP (SQLITE_IOERR | (21<<8)) +#define SQLITE_IOERR_SEEK (SQLITE_IOERR | (22<<8)) #define SQLITE_LOCKED_SHAREDCACHE (SQLITE_LOCKED | (1<<8)) #define SQLITE_BUSY_RECOVERY (SQLITE_BUSY | (1<<8)) #define SQLITE_CANTOPEN_NOTEMPDIR (SQLITE_CANTOPEN | (1<<8)) +#define SQLITE_CORRUPT_VTAB (SQLITE_CORRUPT | (1<<8)) +#define SQLITE_READONLY_RECOVERY (SQLITE_READONLY | (1<<8)) +#define SQLITE_READONLY_CANTLOCK (SQLITE_READONLY | (2<<8)) /* ** CAPI3REF: Flags For File Open Operations ** ** These bit values are intended for use in the ** 3rd parameter to the [sqlite3_open_v2()] interface and -** in the 4th parameter to the xOpen method of the -** [sqlite3_vfs] object. +** in the 4th parameter to the [sqlite3_vfs.xOpen] method. */ #define SQLITE_OPEN_READONLY 0x00000001 /* Ok for sqlite3_open_v2() */ #define SQLITE_OPEN_READWRITE 0x00000002 /* Ok for sqlite3_open_v2() */ @@ -1013,6 +1018,7 @@ SQLITE_API int sqlite3_exec( #define SQLITE_OPEN_DELETEONCLOSE 0x00000008 /* VFS only */ #define SQLITE_OPEN_EXCLUSIVE 0x00000010 /* VFS only */ #define SQLITE_OPEN_AUTOPROXY 0x00000020 /* VFS only */ +#define SQLITE_OPEN_URI 0x00000040 /* Ok for sqlite3_open_v2() */ #define SQLITE_OPEN_MAIN_DB 0x00000100 /* VFS only */ #define SQLITE_OPEN_TEMP_DB 0x00000200 /* VFS only */ #define SQLITE_OPEN_TRANSIENT_DB 0x00000400 /* VFS only */ @@ -1123,17 +1129,18 @@ struct sqlite3_file { /* ** CAPI3REF: OS Interface File Virtual Methods Object ** -** Every file opened by the [sqlite3_vfs] xOpen method populates an +** Every file opened by the [sqlite3_vfs.xOpen] method populates an ** [sqlite3_file] object (or, more commonly, a subclass of the ** [sqlite3_file] object) with a pointer to an instance of this object. ** This object defines the methods used to perform various operations ** against the open file represented by the [sqlite3_file] object. ** -** If the xOpen method sets the sqlite3_file.pMethods element +** If the [sqlite3_vfs.xOpen] method sets the sqlite3_file.pMethods element ** to a non-NULL pointer, then the sqlite3_io_methods.xClose method -** may be invoked even if the xOpen reported that it failed. The -** only way to prevent a call to xClose following a failed xOpen -** is for the xOpen to set the sqlite3_file.pMethods element to NULL. +** may be invoked even if the [sqlite3_vfs.xOpen] reported that it failed. The +** only way to prevent a call to xClose following a failed [sqlite3_vfs.xOpen] +** is for the [sqlite3_vfs.xOpen] to set the sqlite3_file.pMethods element +** to NULL. ** ** The flags argument to xSync may be one of [SQLITE_SYNC_NORMAL] or ** [SQLITE_SYNC_FULL]. The first choice is the normal fsync(). @@ -1305,7 +1312,8 @@ typedef struct sqlite3_mutex sqlite3_mutex; ** ** An instance of the sqlite3_vfs object defines the interface between ** the SQLite core and the underlying operating system. The "vfs" -** in the name of the object stands for "virtual file system". +** in the name of the object stands for "virtual file system". See +** the [VFS | VFS documentation] for further information. ** ** The value of the iVersion field is initially 1 but may be larger in ** future versions of SQLite. Additional fields may be appended to this @@ -1334,6 +1342,7 @@ typedef struct sqlite3_mutex sqlite3_mutex; ** The zName field holds the name of the VFS module. The name must ** be unique across all VFS modules. ** +** [[sqlite3_vfs.xOpen]] ** ^SQLite guarantees that the zFilename parameter to xOpen ** is either a NULL pointer or string obtained ** from xFullPathname() with an optional suffix added. @@ -1411,6 +1420,7 @@ typedef struct sqlite3_mutex sqlite3_mutex; ** element will be valid after xOpen returns regardless of the success ** or failure of the xOpen call. ** +** [[sqlite3_vfs.xAccess]] ** ^The flags argument to xAccess() may be [SQLITE_ACCESS_EXISTS] ** to test for the existence of a file, or [SQLITE_ACCESS_READWRITE] to ** test whether a file is readable and writable, or [SQLITE_ACCESS_READ] @@ -1435,7 +1445,7 @@ typedef struct sqlite3_mutex sqlite3_mutex; ** method returns a Julian Day Number for the current date and time as ** a floating point value. ** ^The xCurrentTimeInt64() method returns, as an integer, the Julian -** Day Number multipled by 86400000 (the number of milliseconds in +** Day Number multiplied by 86400000 (the number of milliseconds in ** a 24-hour day). ** ^SQLite will use the xCurrentTimeInt64() method to get the current ** date and time if that method is available (if iVersion is 2 or @@ -1657,9 +1667,9 @@ SQLITE_API int sqlite3_os_end(void); ** implementation of an application-defined [sqlite3_os_init()]. ** ** The first argument to sqlite3_config() is an integer -** [SQLITE_CONFIG_SINGLETHREAD | configuration option] that determines +** [configuration option] that determines ** what property of SQLite is to be configured. Subsequent arguments -** vary depending on the [SQLITE_CONFIG_SINGLETHREAD | configuration option] +** vary depending on the [configuration option] ** in the first argument. ** ** ^When a configuration option is set, sqlite3_config() returns [SQLITE_OK]. @@ -1769,6 +1779,7 @@ struct sqlite3_mem_methods { /* ** CAPI3REF: Configuration Options +** KEYWORDS: {configuration option} ** ** These constants are the available integer configuration options that ** can be passed as the first argument to the [sqlite3_config()] interface. @@ -1781,7 +1792,7 @@ struct sqlite3_mem_methods { ** is invoked. ** ** <dl> -** <dt>SQLITE_CONFIG_SINGLETHREAD</dt> +** [[SQLITE_CONFIG_SINGLETHREAD]] <dt>SQLITE_CONFIG_SINGLETHREAD</dt> ** <dd>There are no arguments to this option. ^This option sets the ** [threading mode] to Single-thread. In other words, it disables ** all mutexing and puts SQLite into a mode where it can only be used @@ -1792,7 +1803,7 @@ struct sqlite3_mem_methods { ** [SQLITE_ERROR] if called with the SQLITE_CONFIG_SINGLETHREAD ** configuration option.</dd> ** -** <dt>SQLITE_CONFIG_MULTITHREAD</dt> +** [[SQLITE_CONFIG_MULTITHREAD]] <dt>SQLITE_CONFIG_MULTITHREAD</dt> ** <dd>There are no arguments to this option. ^This option sets the ** [threading mode] to Multi-thread. In other words, it disables ** mutexing on [database connection] and [prepared statement] objects. @@ -1806,7 +1817,7 @@ struct sqlite3_mem_methods { ** [sqlite3_config()] will return [SQLITE_ERROR] if called with the ** SQLITE_CONFIG_MULTITHREAD configuration option.</dd> ** -** <dt>SQLITE_CONFIG_SERIALIZED</dt> +** [[SQLITE_CONFIG_SERIALIZED]] <dt>SQLITE_CONFIG_SERIALIZED</dt> ** <dd>There are no arguments to this option. ^This option sets the ** [threading mode] to Serialized. In other words, this option enables ** all mutexes including the recursive @@ -1822,7 +1833,7 @@ struct sqlite3_mem_methods { ** [sqlite3_config()] will return [SQLITE_ERROR] if called with the ** SQLITE_CONFIG_SERIALIZED configuration option.</dd> ** -** <dt>SQLITE_CONFIG_MALLOC</dt> +** [[SQLITE_CONFIG_MALLOC]] <dt>SQLITE_CONFIG_MALLOC</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** instance of the [sqlite3_mem_methods] structure. The argument specifies ** alternative low-level memory allocation routines to be used in place of @@ -1830,7 +1841,7 @@ struct sqlite3_mem_methods { ** its own private copy of the content of the [sqlite3_mem_methods] structure ** before the [sqlite3_config()] call returns.</dd> ** -** <dt>SQLITE_CONFIG_GETMALLOC</dt> +** [[SQLITE_CONFIG_GETMALLOC]] <dt>SQLITE_CONFIG_GETMALLOC</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** instance of the [sqlite3_mem_methods] structure. The [sqlite3_mem_methods] ** structure is filled with the currently defined memory allocation routines.)^ @@ -1838,7 +1849,7 @@ struct sqlite3_mem_methods { ** routines with a wrapper that simulations memory allocation failure or ** tracks memory usage, for example. </dd> ** -** <dt>SQLITE_CONFIG_MEMSTATUS</dt> +** [[SQLITE_CONFIG_MEMSTATUS]] <dt>SQLITE_CONFIG_MEMSTATUS</dt> ** <dd> ^This option takes single argument of type int, interpreted as a ** boolean, which enables or disables the collection of memory allocation ** statistics. ^(When memory allocation statistics are disabled, the @@ -1854,7 +1865,7 @@ struct sqlite3_mem_methods { ** allocation statistics are disabled by default. ** </dd> ** -** <dt>SQLITE_CONFIG_SCRATCH</dt> +** [[SQLITE_CONFIG_SCRATCH]] <dt>SQLITE_CONFIG_SCRATCH</dt> ** <dd> ^This option specifies a static memory buffer that SQLite can use for ** scratch memory. There are three arguments: A pointer an 8-byte ** aligned memory buffer from which the scratch allocations will be @@ -1870,9 +1881,9 @@ struct sqlite3_mem_methods { ** scratch memory beyond what is provided by this configuration option, then ** [sqlite3_malloc()] will be used to obtain the memory needed.</dd> ** -** <dt>SQLITE_CONFIG_PAGECACHE</dt> +** [[SQLITE_CONFIG_PAGECACHE]] <dt>SQLITE_CONFIG_PAGECACHE</dt> ** <dd> ^This option specifies a static memory buffer that SQLite can use for -** the database page cache with the default page cache implemenation. +** the database page cache with the default page cache implementation. ** This configuration should not be used if an application-define page ** cache implementation is loaded using the SQLITE_CONFIG_PCACHE option. ** There are three arguments to this option: A pointer to 8-byte aligned @@ -1891,7 +1902,7 @@ struct sqlite3_mem_methods { ** be aligned to an 8-byte boundary or subsequent behavior of SQLite ** will be undefined.</dd> ** -** <dt>SQLITE_CONFIG_HEAP</dt> +** [[SQLITE_CONFIG_HEAP]] <dt>SQLITE_CONFIG_HEAP</dt> ** <dd> ^This option specifies a static memory buffer that SQLite will use ** for all of its dynamic memory allocation needs beyond those provided ** for by [SQLITE_CONFIG_SCRATCH] and [SQLITE_CONFIG_PAGECACHE]. @@ -1908,7 +1919,7 @@ struct sqlite3_mem_methods { ** The minimum allocation size is capped at 2^12. Reasonable values ** for the minimum allocation size are 2^5 through 2^8.</dd> ** -** <dt>SQLITE_CONFIG_MUTEX</dt> +** [[SQLITE_CONFIG_MUTEX]] <dt>SQLITE_CONFIG_MUTEX</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** instance of the [sqlite3_mutex_methods] structure. The argument specifies ** alternative low-level mutex routines to be used in place @@ -1920,7 +1931,7 @@ struct sqlite3_mem_methods { ** [sqlite3_config()] with the SQLITE_CONFIG_MUTEX configuration option will ** return [SQLITE_ERROR].</dd> ** -** <dt>SQLITE_CONFIG_GETMUTEX</dt> +** [[SQLITE_CONFIG_GETMUTEX]] <dt>SQLITE_CONFIG_GETMUTEX</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** instance of the [sqlite3_mutex_methods] structure. The ** [sqlite3_mutex_methods] @@ -1933,7 +1944,7 @@ struct sqlite3_mem_methods { ** [sqlite3_config()] with the SQLITE_CONFIG_GETMUTEX configuration option will ** return [SQLITE_ERROR].</dd> ** -** <dt>SQLITE_CONFIG_LOOKASIDE</dt> +** [[SQLITE_CONFIG_LOOKASIDE]] <dt>SQLITE_CONFIG_LOOKASIDE</dt> ** <dd> ^(This option takes two arguments that determine the default ** memory allocation for the lookaside memory allocator on each ** [database connection]. The first argument is the @@ -1943,18 +1954,18 @@ struct sqlite3_mem_methods { ** verb to [sqlite3_db_config()] can be used to change the lookaside ** configuration on individual connections.)^ </dd> ** -** <dt>SQLITE_CONFIG_PCACHE</dt> +** [[SQLITE_CONFIG_PCACHE]] <dt>SQLITE_CONFIG_PCACHE</dt> ** <dd> ^(This option takes a single argument which is a pointer to ** an [sqlite3_pcache_methods] object. This object specifies the interface ** to a custom page cache implementation.)^ ^SQLite makes a copy of the ** object and uses it for page cache memory allocations.</dd> ** -** <dt>SQLITE_CONFIG_GETPCACHE</dt> +** [[SQLITE_CONFIG_GETPCACHE]] <dt>SQLITE_CONFIG_GETPCACHE</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** [sqlite3_pcache_methods] object. SQLite copies of the current ** page cache implementation into that object.)^ </dd> ** -** <dt>SQLITE_CONFIG_LOG</dt> +** [[SQLITE_CONFIG_LOG]] <dt>SQLITE_CONFIG_LOG</dt> ** <dd> ^The SQLITE_CONFIG_LOG option takes two arguments: a pointer to a ** function with a call signature of void(*)(void*,int,const char*), ** and a pointer to void. ^If the function pointer is not NULL, it is @@ -1972,6 +1983,18 @@ struct sqlite3_mem_methods { ** In a multi-threaded application, the application-defined logger ** function must be threadsafe. </dd> ** +** [[SQLITE_CONFIG_URI]] <dt>SQLITE_CONFIG_URI +** <dd> This option takes a single argument of type int. If non-zero, then +** URI handling is globally enabled. If the parameter is zero, then URI handling +** is globally disabled. If URI handling is globally enabled, all filenames +** passed to [sqlite3_open()], [sqlite3_open_v2()], [sqlite3_open16()] or +** specified as part of [ATTACH] commands are interpreted as URIs, regardless +** of whether or not the [SQLITE_OPEN_URI] flag is set when the database +** connection is opened. If it is globally disabled, filenames are +** only interpreted as URIs if the SQLITE_OPEN_URI flag is set when the +** database connection is opened. By default, URI handling is globally +** disabled. The default value may be changed by compiling with the +** [SQLITE_USE_URI] symbol defined. ** </dl> */ #define SQLITE_CONFIG_SINGLETHREAD 1 /* nil */ @@ -1990,6 +2013,7 @@ struct sqlite3_mem_methods { #define SQLITE_CONFIG_PCACHE 14 /* sqlite3_pcache_methods* */ #define SQLITE_CONFIG_GETPCACHE 15 /* sqlite3_pcache_methods* */ #define SQLITE_CONFIG_LOG 16 /* xFunc, void* */ +#define SQLITE_CONFIG_URI 17 /* int */ /* ** CAPI3REF: Database Connection Configuration Options @@ -2075,13 +2099,17 @@ SQLITE_API int sqlite3_extended_result_codes(sqlite3*, int onoff); ** ** ^This routine returns the [rowid] of the most recent ** successful [INSERT] into the database from the [database connection] -** in the first argument. ^If no successful [INSERT]s +** in the first argument. ^As of SQLite version 3.7.7, this routines +** records the last insert rowid of both ordinary tables and [virtual tables]. +** ^If no successful [INSERT]s ** have ever occurred on that database connection, zero is returned. ** -** ^(If an [INSERT] occurs within a trigger, then the [rowid] of the inserted -** row is returned by this routine as long as the trigger is running. -** But once the trigger terminates, the value returned by this routine -** reverts to the last value inserted before the trigger fired.)^ +** ^(If an [INSERT] occurs within a trigger or within a [virtual table] +** method, then this routine will return the [rowid] of the inserted +** row as long as the trigger or virtual table method is running. +** But once the trigger or virtual table method ends, the value returned +** by this routine reverts to what it was before the trigger or virtual +** table method began.)^ ** ** ^An [INSERT] that fails due to a constraint violation is not a ** successful [INSERT] and does not change the value returned by this @@ -2744,6 +2772,9 @@ SQLITE_API int sqlite3_set_authorizer( ** to signal SQLite whether or not the action is permitted. See the ** [sqlite3_set_authorizer | authorizer documentation] for additional ** information. +** +** Note that SQLITE_IGNORE is also used as a [SQLITE_ROLLBACK | return code] +** from the [sqlite3_vtab_on_conflict()] interface. */ #define SQLITE_DENY 1 /* Abort the SQL statement with an error */ #define SQLITE_IGNORE 2 /* Don't allow access, but don't generate an error */ @@ -2866,7 +2897,7 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); /* ** CAPI3REF: Opening A New Database Connection ** -** ^These routines open an SQLite database file whose name is given by the +** ^These routines open an SQLite database file as specified by the ** filename argument. ^The filename argument is interpreted as UTF-8 for ** sqlite3_open() and sqlite3_open_v2() and as UTF-16 in the native byte ** order for sqlite3_open16(). ^(A [database connection] handle is usually @@ -2893,7 +2924,7 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); ** sqlite3_open_v2() can take one of ** the following three values, optionally combined with the ** [SQLITE_OPEN_NOMUTEX], [SQLITE_OPEN_FULLMUTEX], [SQLITE_OPEN_SHAREDCACHE], -** and/or [SQLITE_OPEN_PRIVATECACHE] flags:)^ +** [SQLITE_OPEN_PRIVATECACHE], and/or [SQLITE_OPEN_URI] flags:)^ ** ** <dl> ** ^(<dt>[SQLITE_OPEN_READONLY]</dt> @@ -2912,9 +2943,8 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); ** </dl> ** ** If the 3rd parameter to sqlite3_open_v2() is not one of the -** combinations shown above or one of the combinations shown above combined -** with the [SQLITE_OPEN_NOMUTEX], [SQLITE_OPEN_FULLMUTEX], -** [SQLITE_OPEN_SHAREDCACHE] and/or [SQLITE_OPEN_PRIVATECACHE] flags, +** combinations shown above optionally combined with other +** [SQLITE_OPEN_READONLY | SQLITE_OPEN_* bits] ** then the behavior is undefined. ** ** ^If the [SQLITE_OPEN_NOMUTEX] flag is set, then the database connection @@ -2929,6 +2959,11 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); ** [SQLITE_OPEN_PRIVATECACHE] flag causes the database connection to not ** participate in [shared cache mode] even if it is enabled. ** +** ^The fourth parameter to sqlite3_open_v2() is the name of the +** [sqlite3_vfs] object that defines the operating system interface that +** the new database connection should use. ^If the fourth parameter is +** a NULL pointer then the default [sqlite3_vfs] object is used. +** ** ^If the filename is ":memory:", then a private, temporary in-memory database ** is created for the connection. ^This in-memory database will vanish when ** the database connection is closed. Future versions of SQLite might @@ -2941,10 +2976,111 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); ** on-disk database will be created. ^This private database will be ** automatically deleted as soon as the database connection is closed. ** -** ^The fourth parameter to sqlite3_open_v2() is the name of the -** [sqlite3_vfs] object that defines the operating system interface that -** the new database connection should use. ^If the fourth parameter is -** a NULL pointer then the default [sqlite3_vfs] object is used. +** [[URI filenames in sqlite3_open()]] <h3>URI Filenames</h3> +** +** ^If [URI filename] interpretation is enabled, and the filename argument +** begins with "file:", then the filename is interpreted as a URI. ^URI +** filename interpretation is enabled if the [SQLITE_OPEN_URI] flag is +** set in the fourth argument to sqlite3_open_v2(), or if it has +** been enabled globally using the [SQLITE_CONFIG_URI] option with the +** [sqlite3_config()] method or by the [SQLITE_USE_URI] compile-time option. +** As of SQLite version 3.7.7, URI filename interpretation is turned off +** by default, but future releases of SQLite might enable URI filename +** interpretation by default. See "[URI filenames]" for additional +** information. +** +** URI filenames are parsed according to RFC 3986. ^If the URI contains an +** authority, then it must be either an empty string or the string +** "localhost". ^If the authority is not an empty string or "localhost", an +** error is returned to the caller. ^The fragment component of a URI, if +** present, is ignored. +** +** ^SQLite uses the path component of the URI as the name of the disk file +** which contains the database. ^If the path begins with a '/' character, +** then it is interpreted as an absolute path. ^If the path does not begin +** with a '/' (meaning that the authority section is omitted from the URI) +** then the path is interpreted as a relative path. +** ^On windows, the first component of an absolute path +** is a drive specification (e.g. "C:"). +** +** [[core URI query parameters]] +** The query component of a URI may contain parameters that are interpreted +** either by SQLite itself, or by a [VFS | custom VFS implementation]. +** SQLite interprets the following three query parameters: +** +** <ul> +** <li> <b>vfs</b>: ^The "vfs" parameter may be used to specify the name of +** a VFS object that provides the operating system interface that should +** be used to access the database file on disk. ^If this option is set to +** an empty string the default VFS object is used. ^Specifying an unknown +** VFS is an error. ^If sqlite3_open_v2() is used and the vfs option is +** present, then the VFS specified by the option takes precedence over +** the value passed as the fourth parameter to sqlite3_open_v2(). +** +** <li> <b>mode</b>: ^(The mode parameter may be set to either "ro", "rw" or +** "rwc". Attempting to set it to any other value is an error)^. +** ^If "ro" is specified, then the database is opened for read-only +** access, just as if the [SQLITE_OPEN_READONLY] flag had been set in the +** third argument to sqlite3_prepare_v2(). ^If the mode option is set to +** "rw", then the database is opened for read-write (but not create) +** access, as if SQLITE_OPEN_READWRITE (but not SQLITE_OPEN_CREATE) had +** been set. ^Value "rwc" is equivalent to setting both +** SQLITE_OPEN_READWRITE and SQLITE_OPEN_CREATE. ^If sqlite3_open_v2() is +** used, it is an error to specify a value for the mode parameter that is +** less restrictive than that specified by the flags passed as the third +** parameter. +** +** <li> <b>cache</b>: ^The cache parameter may be set to either "shared" or +** "private". ^Setting it to "shared" is equivalent to setting the +** SQLITE_OPEN_SHAREDCACHE bit in the flags argument passed to +** sqlite3_open_v2(). ^Setting the cache parameter to "private" is +** equivalent to setting the SQLITE_OPEN_PRIVATECACHE bit. +** ^If sqlite3_open_v2() is used and the "cache" parameter is present in +** a URI filename, its value overrides any behaviour requested by setting +** SQLITE_OPEN_PRIVATECACHE or SQLITE_OPEN_SHAREDCACHE flag. +** </ul> +** +** ^Specifying an unknown parameter in the query component of a URI is not an +** error. Future versions of SQLite might understand additional query +** parameters. See "[query parameters with special meaning to SQLite]" for +** additional information. +** +** [[URI filename examples]] <h3>URI filename examples</h3> +** +** <table border="1" align=center cellpadding=5> +** <tr><th> URI filenames <th> Results +** <tr><td> file:data.db <td> +** Open the file "data.db" in the current directory. +** <tr><td> file:/home/fred/data.db<br> +** file:///home/fred/data.db <br> +** file://localhost/home/fred/data.db <br> <td> +** Open the database file "/home/fred/data.db". +** <tr><td> file://darkstar/home/fred/data.db <td> +** An error. "darkstar" is not a recognized authority. +** <tr><td style="white-space:nowrap"> +** file:///C:/Documents%20and%20Settings/fred/Desktop/data.db +** <td> Windows only: Open the file "data.db" on fred's desktop on drive +** C:. Note that the %20 escaping in this example is not strictly +** necessary - space characters can be used literally +** in URI filenames. +** <tr><td> file:data.db?mode=ro&cache=private <td> +** Open file "data.db" in the current directory for read-only access. +** Regardless of whether or not shared-cache mode is enabled by +** default, use a private cache. +** <tr><td> file:/home/fred/data.db?vfs=unix-nolock <td> +** Open file "/home/fred/data.db". Use the special VFS "unix-nolock". +** <tr><td> file:data.db?mode=readonly <td> +** An error. "readonly" is not a valid option for the "mode" parameter. +** </table> +** +** ^URI hexadecimal escape sequences (%HH) are supported within the path and +** query components of a URI. A hexadecimal escape sequence consists of a +** percent sign - "%" - followed by exactly two hexadecimal digits +** specifying an octet value. ^Before the path or query components of a +** URI filename are interpreted, they are encoded using UTF-8 and all +** hexadecimal escape sequences replaced by a single byte containing the +** corresponding octet. If this process generates an invalid UTF-8 encoding, +** the results are undefined. ** ** <b>Note to Windows users:</b> The encoding used for the filename argument ** of sqlite3_open() and sqlite3_open_v2() must be UTF-8, not whatever @@ -2968,6 +3104,26 @@ SQLITE_API int sqlite3_open_v2( ); /* +** CAPI3REF: Obtain Values For URI Parameters +** +** This is a utility routine, useful to VFS implementations, that checks +** to see if a database file was a URI that contained a specific query +** parameter, and if so obtains the value of the query parameter. +** +** The zFilename argument is the filename pointer passed into the xOpen() +** method of a VFS implementation. The zParam argument is the name of the +** query parameter we seek. This routine returns the value of the zParam +** parameter if it exists. If the parameter does not exist, this routine +** returns a NULL pointer. +** +** If the zFilename argument to this function is not a pointer that SQLite +** passed into the xOpen VFS method, then the behavior of this routine +** is undefined and probably undesirable. +*/ +SQLITE_API const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam); + + +/* ** CAPI3REF: Error Codes And Messages ** ** ^The sqlite3_errcode() interface returns the numeric [result code] or @@ -3082,43 +3238,45 @@ SQLITE_API int sqlite3_limit(sqlite3*, int id, int newVal); ** Additional information is available at [limits | Limits in SQLite]. ** ** <dl> -** ^(<dt>SQLITE_LIMIT_LENGTH</dt> +** [[SQLITE_LIMIT_LENGTH]] ^(<dt>SQLITE_LIMIT_LENGTH</dt> ** <dd>The maximum size of any string or BLOB or table row, in bytes.<dd>)^ ** -** ^(<dt>SQLITE_LIMIT_SQL_LENGTH</dt> +** [[SQLITE_LIMIT_SQL_LENGTH]] ^(<dt>SQLITE_LIMIT_SQL_LENGTH</dt> ** <dd>The maximum length of an SQL statement, in bytes.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_COLUMN</dt> +** [[SQLITE_LIMIT_COLUMN]] ^(<dt>SQLITE_LIMIT_COLUMN</dt> ** <dd>The maximum number of columns in a table definition or in the ** result set of a [SELECT] or the maximum number of columns in an index ** or in an ORDER BY or GROUP BY clause.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_EXPR_DEPTH</dt> +** [[SQLITE_LIMIT_EXPR_DEPTH]] ^(<dt>SQLITE_LIMIT_EXPR_DEPTH</dt> ** <dd>The maximum depth of the parse tree on any expression.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt> +** [[SQLITE_LIMIT_COMPOUND_SELECT]] ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt> ** <dd>The maximum number of terms in a compound SELECT statement.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_VDBE_OP</dt> +** [[SQLITE_LIMIT_VDBE_OP]] ^(<dt>SQLITE_LIMIT_VDBE_OP</dt> ** <dd>The maximum number of instructions in a virtual machine program ** used to implement an SQL statement. This limit is not currently ** enforced, though that might be added in some future release of ** SQLite.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt> +** [[SQLITE_LIMIT_FUNCTION_ARG]] ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt> ** <dd>The maximum number of arguments on a function.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_ATTACHED</dt> +** [[SQLITE_LIMIT_ATTACHED]] ^(<dt>SQLITE_LIMIT_ATTACHED</dt> ** <dd>The maximum number of [ATTACH | attached databases].)^</dd> ** +** [[SQLITE_LIMIT_LIKE_PATTERN_LENGTH]] ** ^(<dt>SQLITE_LIMIT_LIKE_PATTERN_LENGTH</dt> ** <dd>The maximum length of the pattern argument to the [LIKE] or ** [GLOB] operators.</dd>)^ ** +** [[SQLITE_LIMIT_VARIABLE_NUMBER]] ** ^(<dt>SQLITE_LIMIT_VARIABLE_NUMBER</dt> ** <dd>The maximum index number of any [parameter] in an SQL statement.)^ ** -** ^(<dt>SQLITE_LIMIT_TRIGGER_DEPTH</dt> +** [[SQLITE_LIMIT_TRIGGER_DEPTH]] ^(<dt>SQLITE_LIMIT_TRIGGER_DEPTH</dt> ** <dd>The maximum depth of recursion for triggers.</dd>)^ ** </dl> */ @@ -3647,7 +3805,7 @@ SQLITE_API const void *sqlite3_column_decltype16(sqlite3_stmt*,int); ** ^[SQLITE_BUSY] means that the database engine was unable to acquire the ** database locks it needs to do its job. ^If the statement is a [COMMIT] ** or occurs outside of an explicit transaction, then you can retry the -** statement. If the statement is not a [COMMIT] and occurs within a +** statement. If the statement is not a [COMMIT] and occurs within an ** explicit transaction then you should rollback the transaction before ** continuing. ** @@ -3926,7 +4084,7 @@ SQLITE_API sqlite3_value *sqlite3_column_value(sqlite3_stmt*, int iCol); ** CAPI3REF: Destroy A Prepared Statement Object ** ** ^The sqlite3_finalize() function is called to delete a [prepared statement]. -** ^If the most recent evaluation of the statement encountered no errors or +** ^If the most recent evaluation of the statement encountered no errors ** or if the statement is never been evaluated, then sqlite3_finalize() returns ** SQLITE_OK. ^If the most recent evaluation of statement S failed, then ** sqlite3_finalize(S) returns the appropriate [error code] or @@ -5153,6 +5311,11 @@ struct sqlite3_module { void (**pxFunc)(sqlite3_context*,int,sqlite3_value**), void **ppArg); int (*xRename)(sqlite3_vtab *pVtab, const char *zNew); + /* The methods above are in version 1 of the sqlite_module object. Those + ** below are for version 2 and greater. */ + int (*xSavepoint)(sqlite3_vtab *pVTab, int); + int (*xRelease)(sqlite3_vtab *pVTab, int); + int (*xRollbackTo)(sqlite3_vtab *pVTab, int); }; /* @@ -5835,7 +5998,7 @@ struct sqlite3_mutex_methods { ** ** ^If the argument to sqlite3_mutex_held() is a NULL pointer then ** the routine should return 1. This seems counter-intuitive since -** clearly the mutex cannot be held if it does not exist. But the +** clearly the mutex cannot be held if it does not exist. But ** the reason the mutex does not exist is because the build is not ** using mutexes. And we do not want the assert() containing the ** call to sqlite3_mutex_held() to fail, so a non-zero return is @@ -5958,7 +6121,8 @@ SQLITE_API int sqlite3_test_control(int op, ...); #define SQLITE_TESTCTRL_ISKEYWORD 16 #define SQLITE_TESTCTRL_PGHDRSZ 17 #define SQLITE_TESTCTRL_SCRATCHMALLOC 18 -#define SQLITE_TESTCTRL_LAST 18 +#define SQLITE_TESTCTRL_LOCALTIME_FAULT 19 +#define SQLITE_TESTCTRL_LAST 19 /* ** CAPI3REF: SQLite Runtime Status @@ -5967,7 +6131,7 @@ SQLITE_API int sqlite3_test_control(int op, ...); ** about the performance of SQLite, and optionally to reset various ** highwater marks. ^The first argument is an integer code for ** the specific parameter to measure. ^(Recognized integer codes -** are of the form [SQLITE_STATUS_MEMORY_USED | SQLITE_STATUS_...].)^ +** are of the form [status parameters | SQLITE_STATUS_...].)^ ** ^The current value of the parameter is returned into *pCurrent. ** ^The highest recorded value is returned in *pHighwater. ^If the ** resetFlag is true, then the highest record value is reset after @@ -5994,12 +6158,13 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF /* ** CAPI3REF: Status Parameters +** KEYWORDS: {status parameters} ** ** These integer constants designate various run-time status parameters ** that can be returned by [sqlite3_status()]. ** ** <dl> -** ^(<dt>SQLITE_STATUS_MEMORY_USED</dt> +** [[SQLITE_STATUS_MEMORY_USED]] ^(<dt>SQLITE_STATUS_MEMORY_USED</dt> ** <dd>This parameter is the current amount of memory checked out ** using [sqlite3_malloc()], either directly or indirectly. The ** figure includes calls made to [sqlite3_malloc()] by the application @@ -6009,23 +6174,24 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** this parameter. The amount returned is the sum of the allocation ** sizes as reported by the xSize method in [sqlite3_mem_methods].</dd>)^ ** -** ^(<dt>SQLITE_STATUS_MALLOC_SIZE</dt> +** [[SQLITE_STATUS_MALLOC_SIZE]] ^(<dt>SQLITE_STATUS_MALLOC_SIZE</dt> ** <dd>This parameter records the largest memory allocation request ** handed to [sqlite3_malloc()] or [sqlite3_realloc()] (or their ** internal equivalents). Only the value returned in the ** *pHighwater parameter to [sqlite3_status()] is of interest. ** The value written into the *pCurrent parameter is undefined.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_MALLOC_COUNT</dt> +** [[SQLITE_STATUS_MALLOC_COUNT]] ^(<dt>SQLITE_STATUS_MALLOC_COUNT</dt> ** <dd>This parameter records the number of separate memory allocations ** currently checked out.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_PAGECACHE_USED</dt> +** [[SQLITE_STATUS_PAGECACHE_USED]] ^(<dt>SQLITE_STATUS_PAGECACHE_USED</dt> ** <dd>This parameter returns the number of pages used out of the ** [pagecache memory allocator] that was configured using ** [SQLITE_CONFIG_PAGECACHE]. The ** value returned is in pages, not in bytes.</dd>)^ ** +** [[SQLITE_STATUS_PAGECACHE_OVERFLOW]] ** ^(<dt>SQLITE_STATUS_PAGECACHE_OVERFLOW</dt> ** <dd>This parameter returns the number of bytes of page cache ** allocation which could not be satisfied by the [SQLITE_CONFIG_PAGECACHE] @@ -6035,13 +6201,13 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** [SQLITE_CONFIG_PAGECACHE]) and allocations that overflowed because ** no space was left in the page cache.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_PAGECACHE_SIZE</dt> +** [[SQLITE_STATUS_PAGECACHE_SIZE]] ^(<dt>SQLITE_STATUS_PAGECACHE_SIZE</dt> ** <dd>This parameter records the largest memory allocation request ** handed to [pagecache memory allocator]. Only the value returned in the ** *pHighwater parameter to [sqlite3_status()] is of interest. ** The value written into the *pCurrent parameter is undefined.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_SCRATCH_USED</dt> +** [[SQLITE_STATUS_SCRATCH_USED]] ^(<dt>SQLITE_STATUS_SCRATCH_USED</dt> ** <dd>This parameter returns the number of allocations used out of the ** [scratch memory allocator] configured using ** [SQLITE_CONFIG_SCRATCH]. The value returned is in allocations, not @@ -6049,7 +6215,7 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** outstanding at time, this parameter also reports the number of threads ** using scratch memory at the same time.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_SCRATCH_OVERFLOW</dt> +** [[SQLITE_STATUS_SCRATCH_OVERFLOW]] ^(<dt>SQLITE_STATUS_SCRATCH_OVERFLOW</dt> ** <dd>This parameter returns the number of bytes of scratch memory ** allocation which could not be satisfied by the [SQLITE_CONFIG_SCRATCH] ** buffer and where forced to overflow to [sqlite3_malloc()]. The values @@ -6059,13 +6225,13 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** slots were available. ** </dd>)^ ** -** ^(<dt>SQLITE_STATUS_SCRATCH_SIZE</dt> +** [[SQLITE_STATUS_SCRATCH_SIZE]] ^(<dt>SQLITE_STATUS_SCRATCH_SIZE</dt> ** <dd>This parameter records the largest memory allocation request ** handed to [scratch memory allocator]. Only the value returned in the ** *pHighwater parameter to [sqlite3_status()] is of interest. ** The value written into the *pCurrent parameter is undefined.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_PARSER_STACK</dt> +** [[SQLITE_STATUS_PARSER_STACK]] ^(<dt>SQLITE_STATUS_PARSER_STACK</dt> ** <dd>This parameter records the deepest parser stack. It is only ** meaningful if SQLite is compiled with [YYTRACKMAXSTACKDEPTH].</dd>)^ ** </dl> @@ -6090,9 +6256,9 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** about a single [database connection]. ^The first argument is the ** database connection object to be interrogated. ^The second argument ** is an integer constant, taken from the set of -** [SQLITE_DBSTATUS_LOOKASIDE_USED | SQLITE_DBSTATUS_*] macros, that +** [SQLITE_DBSTATUS options], that ** determines the parameter to interrogate. The set of -** [SQLITE_DBSTATUS_LOOKASIDE_USED | SQLITE_DBSTATUS_*] macros is likely +** [SQLITE_DBSTATUS options] is likely ** to grow in future releases of SQLite. ** ** ^The current value of the requested parameter is written into *pCur @@ -6109,6 +6275,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r /* ** CAPI3REF: Status Parameters for database connections +** KEYWORDS: {SQLITE_DBSTATUS options} ** ** These constants are the available integer "verbs" that can be passed as ** the second argument to the [sqlite3_db_status()] interface. @@ -6120,15 +6287,16 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** if a discontinued or unsupported verb is invoked. ** ** <dl> -** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_USED</dt> +** [[SQLITE_DBSTATUS_LOOKASIDE_USED]] ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_USED</dt> ** <dd>This parameter returns the number of lookaside memory slots currently ** checked out.</dd>)^ ** -** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_HIT</dt> +** [[SQLITE_DBSTATUS_LOOKASIDE_HIT]] ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_HIT</dt> ** <dd>This parameter returns the number malloc attempts that were ** satisfied using lookaside memory. Only the high-water value is meaningful; ** the current value is always zero.)^ ** +** [[SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE]] ** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE</dt> ** <dd>This parameter returns the number malloc attempts that might have ** been satisfied using lookaside memory but failed due to the amount of @@ -6136,6 +6304,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** Only the high-water value is meaningful; ** the current value is always zero.)^ ** +** [[SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL]] ** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL</dt> ** <dd>This parameter returns the number malloc attempts that might have ** been satisfied using lookaside memory but failed due to all lookaside @@ -6143,12 +6312,12 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** Only the high-water value is meaningful; ** the current value is always zero.)^ ** -** ^(<dt>SQLITE_DBSTATUS_CACHE_USED</dt> +** [[SQLITE_DBSTATUS_CACHE_USED]] ^(<dt>SQLITE_DBSTATUS_CACHE_USED</dt> ** <dd>This parameter returns the approximate number of of bytes of heap ** memory used by all pager caches associated with the database connection.)^ ** ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_USED is always 0. ** -** ^(<dt>SQLITE_DBSTATUS_SCHEMA_USED</dt> +** [[SQLITE_DBSTATUS_SCHEMA_USED]] ^(<dt>SQLITE_DBSTATUS_SCHEMA_USED</dt> ** <dd>This parameter returns the approximate number of of bytes of heap ** memory used to store the schema for all databases associated ** with the connection - main, temp, and any [ATTACH]-ed databases.)^ @@ -6157,7 +6326,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** [shared cache mode] being enabled. ** ^The highwater mark associated with SQLITE_DBSTATUS_SCHEMA_USED is always 0. ** -** ^(<dt>SQLITE_DBSTATUS_STMT_USED</dt> +** [[SQLITE_DBSTATUS_STMT_USED]] ^(<dt>SQLITE_DBSTATUS_STMT_USED</dt> ** <dd>This parameter returns the approximate number of of bytes of heap ** and lookaside memory used by all prepared statements associated with ** the database connection.)^ @@ -6179,7 +6348,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** CAPI3REF: Prepared Statement Status ** ** ^(Each prepared statement maintains various -** [SQLITE_STMTSTATUS_SORT | counters] that measure the number +** [SQLITE_STMTSTATUS counters] that measure the number ** of times it has performed specific operations.)^ These counters can ** be used to monitor the performance characteristics of the prepared ** statements. For example, if the number of table steps greatly exceeds @@ -6190,7 +6359,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** ^(This interface is used to retrieve and reset counter values from ** a [prepared statement]. The first argument is the prepared statement ** object to be interrogated. The second argument -** is an integer code for a specific [SQLITE_STMTSTATUS_SORT | counter] +** is an integer code for a specific [SQLITE_STMTSTATUS counter] ** to be interrogated.)^ ** ^The current value of the requested counter is returned. ** ^If the resetFlg is true, then the counter is reset to zero after this @@ -6202,24 +6371,25 @@ SQLITE_API int sqlite3_stmt_status(sqlite3_stmt*, int op,int resetFlg); /* ** CAPI3REF: Status Parameters for prepared statements +** KEYWORDS: {SQLITE_STMTSTATUS counter} {SQLITE_STMTSTATUS counters} ** ** These preprocessor macros define integer codes that name counter ** values associated with the [sqlite3_stmt_status()] interface. ** The meanings of the various counters are as follows: ** ** <dl> -** <dt>SQLITE_STMTSTATUS_FULLSCAN_STEP</dt> +** [[SQLITE_STMTSTATUS_FULLSCAN_STEP]] <dt>SQLITE_STMTSTATUS_FULLSCAN_STEP</dt> ** <dd>^This is the number of times that SQLite has stepped forward in ** a table as part of a full table scan. Large numbers for this counter ** may indicate opportunities for performance improvement through ** careful use of indices.</dd> ** -** <dt>SQLITE_STMTSTATUS_SORT</dt> +** [[SQLITE_STMTSTATUS_SORT]] <dt>SQLITE_STMTSTATUS_SORT</dt> ** <dd>^This is the number of sort operations that have occurred. ** A non-zero value in this counter may indicate an opportunity to ** improvement performance through careful use of indices.</dd> ** -** <dt>SQLITE_STMTSTATUS_AUTOINDEX</dt> +** [[SQLITE_STMTSTATUS_AUTOINDEX]] <dt>SQLITE_STMTSTATUS_AUTOINDEX</dt> ** <dd>^This is the number of rows inserted into transient indices that ** were created automatically in order to help joins run faster. ** A non-zero value in this counter may indicate an opportunity to @@ -6270,6 +6440,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** the application may discard the parameter after the call to ** [sqlite3_config()] returns.)^ ** +** [[the xInit() page cache method]] ** ^(The xInit() method is called once for each effective ** call to [sqlite3_initialize()])^ ** (usually only once during the lifetime of the process). ^(The xInit() @@ -6280,6 +6451,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** built-in default page cache is used instead of the application defined ** page cache.)^ ** +** [[the xShutdown() page cache method]] ** ^The xShutdown() method is called by [sqlite3_shutdown()]. ** It can be used to clean up ** any outstanding resources before process shutdown, if required. @@ -6294,6 +6466,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** ^SQLite will never invoke xInit() more than once without an intervening ** call to xShutdown(). ** +** [[the xCreate() page cache methods]] ** ^SQLite invokes the xCreate() method to construct a new cache instance. ** SQLite will typically create one cache instance for each open database file, ** though this is not guaranteed. ^The @@ -6318,6 +6491,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** ^Hence, a cache created with bPurgeable false will ** never contain any unpinned pages. ** +** [[the xCachesize() page cache method]] ** ^(The xCachesize() method may be called at any time by SQLite to set the ** suggested maximum cache-size (number of pages stored by) the cache ** instance passed as the first argument. This is the value configured using @@ -6325,14 +6499,16 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** parameter, the implementation is not required to do anything with this ** value; it is advisory only. ** +** [[the xPagecount() page cache methods]] ** The xPagecount() method must return the number of pages currently ** stored in the cache, both pinned and unpinned. ** +** [[the xFetch() page cache methods]] ** The xFetch() method locates a page in the cache and returns a pointer to ** the page, or a NULL pointer. ** A "page", in this context, means a buffer of szPage bytes aligned at an ** 8-byte boundary. The page to be fetched is determined by the key. ^The -** mimimum key value is 1. After it has been retrieved using xFetch, the page +** minimum key value is 1. After it has been retrieved using xFetch, the page ** is considered to be "pinned". ** ** If the requested page is already in the page cache, then the page cache @@ -6356,6 +6532,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** attempt to unpin one or more cache pages by spilling the content of ** pinned pages to disk and synching the operating system disk cache. ** +** [[the xUnpin() page cache method]] ** ^xUnpin() is called by SQLite with a pointer to a currently pinned page ** as its second argument. If the third parameter, discard, is non-zero, ** then the page must be evicted from the cache. @@ -6368,6 +6545,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** call to xUnpin() unpins the page regardless of the number of prior calls ** to xFetch(). ** +** [[the xRekey() page cache methods]] ** The xRekey() method is used to change the key value associated with the ** page passed as the second argument. If the cache ** previously contains an entry associated with newKey, it must be @@ -6380,6 +6558,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** of these pages are pinned, they are implicitly unpinned, meaning that ** they can be safely discarded. ** +** [[the xDestroy() page cache method]] ** ^The xDestroy() method is used to delete a cache allocated by xCreate(). ** All resources associated with the specified cache should be freed. ^After ** calling the xDestroy() method, SQLite considers the [sqlite3_pcache*] @@ -6442,7 +6621,7 @@ typedef struct sqlite3_backup sqlite3_backup; ** There should be exactly one call to sqlite3_backup_finish() for each ** successful call to sqlite3_backup_init(). ** -** <b>sqlite3_backup_init()</b> +** [[sqlite3_backup_init()]] <b>sqlite3_backup_init()</b> ** ** ^The D and N arguments to sqlite3_backup_init(D,N,S,M) are the ** [database connection] associated with the destination database @@ -6469,7 +6648,7 @@ typedef struct sqlite3_backup sqlite3_backup; ** sqlite3_backup_finish() functions to perform the specified backup ** operation. ** -** <b>sqlite3_backup_step()</b> +** [[sqlite3_backup_step()]] <b>sqlite3_backup_step()</b> ** ** ^Function sqlite3_backup_step(B,N) will copy up to N pages between ** the source and destination databases specified by [sqlite3_backup] object B. @@ -6526,7 +6705,7 @@ typedef struct sqlite3_backup sqlite3_backup; ** by the backup operation, then the backup database is automatically ** updated at the same time. ** -** <b>sqlite3_backup_finish()</b> +** [[sqlite3_backup_finish()]] <b>sqlite3_backup_finish()</b> ** ** When sqlite3_backup_step() has returned [SQLITE_DONE], or when the ** application wishes to abandon the backup operation, the application @@ -6549,7 +6728,8 @@ typedef struct sqlite3_backup sqlite3_backup; ** is not a permanent error and does not affect the return value of ** sqlite3_backup_finish(). ** -** <b>sqlite3_backup_remaining(), sqlite3_backup_pagecount()</b> +** [[sqlite3_backup__remaining()]] [[sqlite3_backup_pagecount()]] +** <b>sqlite3_backup_remaining() and sqlite3_backup_pagecount()</b> ** ** ^Each call to sqlite3_backup_step() sets two values inside ** the [sqlite3_backup] object: the number of pages still to be backed @@ -6935,6 +7115,93 @@ SQLITE_API int sqlite3_wal_checkpoint_v2( #define SQLITE_CHECKPOINT_FULL 1 #define SQLITE_CHECKPOINT_RESTART 2 +/* +** CAPI3REF: Virtual Table Interface Configuration +** +** This function may be called by either the [xConnect] or [xCreate] method +** of a [virtual table] implementation to configure +** various facets of the virtual table interface. +** +** If this interface is invoked outside the context of an xConnect or +** xCreate virtual table method then the behavior is undefined. +** +** At present, there is only one option that may be configured using +** this function. (See [SQLITE_VTAB_CONSTRAINT_SUPPORT].) Further options +** may be added in the future. +*/ +SQLITE_API int sqlite3_vtab_config(sqlite3*, int op, ...); + +/* +** CAPI3REF: Virtual Table Configuration Options +** +** These macros define the various options to the +** [sqlite3_vtab_config()] interface that [virtual table] implementations +** can use to customize and optimize their behavior. +** +** <dl> +** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT +** <dd>Calls of the form +** [sqlite3_vtab_config](db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported, +** where X is an integer. If X is zero, then the [virtual table] whose +** [xCreate] or [xConnect] method invoked [sqlite3_vtab_config()] does not +** support constraints. In this configuration (which is the default) if +** a call to the [xUpdate] method returns [SQLITE_CONSTRAINT], then the entire +** statement is rolled back as if [ON CONFLICT | OR ABORT] had been +** specified as part of the users SQL statement, regardless of the actual +** ON CONFLICT mode specified. +** +** If X is non-zero, then the virtual table implementation guarantees +** that if [xUpdate] returns [SQLITE_CONSTRAINT], it will do so before +** any modifications to internal or persistent data structures have been made. +** If the [ON CONFLICT] mode is ABORT, FAIL, IGNORE or ROLLBACK, SQLite +** is able to roll back a statement or database transaction, and abandon +** or continue processing the current SQL statement as appropriate. +** If the ON CONFLICT mode is REPLACE and the [xUpdate] method returns +** [SQLITE_CONSTRAINT], SQLite handles this as if the ON CONFLICT mode +** had been ABORT. +** +** Virtual table implementations that are required to handle OR REPLACE +** must do so within the [xUpdate] method. If a call to the +** [sqlite3_vtab_on_conflict()] function indicates that the current ON +** CONFLICT policy is REPLACE, the virtual table implementation should +** silently replace the appropriate rows within the xUpdate callback and +** return SQLITE_OK. Or, if this is not possible, it may return +** SQLITE_CONSTRAINT, in which case SQLite falls back to OR ABORT +** constraint handling. +** </dl> +*/ +#define SQLITE_VTAB_CONSTRAINT_SUPPORT 1 + +/* +** CAPI3REF: Determine The Virtual Table Conflict Policy +** +** This function may only be called from within a call to the [xUpdate] method +** of a [virtual table] implementation for an INSERT or UPDATE operation. ^The +** value returned is one of [SQLITE_ROLLBACK], [SQLITE_IGNORE], [SQLITE_FAIL], +** [SQLITE_ABORT], or [SQLITE_REPLACE], according to the [ON CONFLICT] mode +** of the SQL statement that triggered the call to the [xUpdate] method of the +** [virtual table]. +*/ +SQLITE_API int sqlite3_vtab_on_conflict(sqlite3 *); + +/* +** CAPI3REF: Conflict resolution modes +** +** These constants are returned by [sqlite3_vtab_on_conflict()] to +** inform a [virtual table] implementation what the [ON CONFLICT] mode +** is for the SQL statement being evaluated. +** +** Note that the [SQLITE_IGNORE] constant is also used as a potential +** return value from the [sqlite3_set_authorizer()] callback and that +** [SQLITE_ABORT] is also a [result code]. +*/ +#define SQLITE_ROLLBACK 1 +/* #define SQLITE_IGNORE 2 // Also used by sqlite3_authorizer() callback */ +#define SQLITE_FAIL 3 +/* #define SQLITE_ABORT 4 // Also an error code */ +#define SQLITE_REPLACE 5 + + /* ** Undo the hack that converts floating point types to integer for @@ -7601,6 +7868,7 @@ typedef struct TriggerPrg TriggerPrg; typedef struct TriggerStep TriggerStep; typedef struct UnpackedRecord UnpackedRecord; typedef struct VTable VTable; +typedef struct VtabCtx VtabCtx; typedef struct Walker Walker; typedef struct WherePlan WherePlan; typedef struct WhereInfo WhereInfo; @@ -7657,6 +7925,7 @@ typedef struct BtShared BtShared; SQLITE_PRIVATE int sqlite3BtreeOpen( + sqlite3_vfs *pVfs, /* VFS to use with this b-tree */ const char *zFilename, /* Name of database file to open */ sqlite3 *db, /* Associated database connection */ Btree **ppBtree, /* Return open Btree* here */ @@ -8217,6 +8486,7 @@ SQLITE_PRIVATE int sqlite3VdbeAddOp3(Vdbe*,int,int,int,int); SQLITE_PRIVATE int sqlite3VdbeAddOp4(Vdbe*,int,int,int,int,const char *zP4,int); SQLITE_PRIVATE int sqlite3VdbeAddOp4Int(Vdbe*,int,int,int,int,int); SQLITE_PRIVATE int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp); +SQLITE_PRIVATE void sqlite3VdbeAddParseSchemaOp(Vdbe*,int,char*); SQLITE_PRIVATE void sqlite3VdbeChangeP1(Vdbe*, int addr, int P1); SQLITE_PRIVATE void sqlite3VdbeChangeP2(Vdbe*, int addr, int P2); SQLITE_PRIVATE void sqlite3VdbeChangeP3(Vdbe*, int addr, int P3); @@ -8230,7 +8500,7 @@ SQLITE_PRIVATE int sqlite3VdbeMakeLabel(Vdbe*); SQLITE_PRIVATE void sqlite3VdbeRunOnlyOnce(Vdbe*); SQLITE_PRIVATE void sqlite3VdbeDelete(Vdbe*); SQLITE_PRIVATE void sqlite3VdbeDeleteObject(sqlite3*,Vdbe*); -SQLITE_PRIVATE void sqlite3VdbeMakeReady(Vdbe*,int,int,int,int,int,int); +SQLITE_PRIVATE void sqlite3VdbeMakeReady(Vdbe*,Parse*); SQLITE_PRIVATE int sqlite3VdbeFinalize(Vdbe*); SQLITE_PRIVATE void sqlite3VdbeResolveLabel(Vdbe*, int); SQLITE_PRIVATE int sqlite3VdbeCurrentAddr(Vdbe*); @@ -8239,6 +8509,7 @@ SQLITE_PRIVATE int sqlite3VdbeAssertMayAbort(Vdbe *, int); SQLITE_PRIVATE void sqlite3VdbeTrace(Vdbe*,FILE*); #endif SQLITE_PRIVATE void sqlite3VdbeResetStepResult(Vdbe*); +SQLITE_PRIVATE void sqlite3VdbeRewind(Vdbe*); SQLITE_PRIVATE int sqlite3VdbeReset(Vdbe*); SQLITE_PRIVATE void sqlite3VdbeSetNumCols(Vdbe*,int); SQLITE_PRIVATE int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, void(*)(void*)); @@ -9015,7 +9286,7 @@ struct Db { ** A thread must be holding a mutex on the corresponding Btree in order ** to access Schema content. This implies that the thread must also be ** holding a mutex on the sqlite3 connection pointer that owns the Btree. -** For a TEMP Schema, on the connection mutex is required. +** For a TEMP Schema, only the connection mutex is required. */ struct Schema { int schema_cookie; /* Database schema version number for this file */ @@ -9136,7 +9407,7 @@ struct sqlite3 { int nDb; /* Number of backends currently in use */ Db *aDb; /* All backends */ int flags; /* Miscellaneous flags. See below */ - int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */ + unsigned int openFlags; /* Flags passed to sqlite3_vfs.xOpen() */ int errCode; /* Most recent error code (SQLITE_*) */ int errMask; /* & result codes with this before returning */ u8 autoCommit; /* The auto-commit flag. */ @@ -9145,6 +9416,7 @@ struct sqlite3 { u8 dfltLockMode; /* Default locking-mode for attached dbs */ signed char nextAutovac; /* Autovac setting after VACUUM if >=0 */ u8 suppressErr; /* Do not issue error messages if true */ + u8 vtabOnConflict; /* Value to return for s3_vtab_on_conflict() */ int nextPagesize; /* Pagesize after VACUUM if >0 */ int nTable; /* Number of tables in the database */ CollSeq *pDfltColl; /* The default collating sequence (BINARY) */ @@ -9203,7 +9475,7 @@ struct sqlite3 { #endif #ifndef SQLITE_OMIT_VIRTUALTABLE Hash aModule; /* populated by sqlite3_create_module() */ - Table *pVTab; /* vtab with active Connect/Create method */ + VtabCtx *pVtabCtx; /* Context for active vtab connect/create */ VTable **aVTrans; /* Virtual tables with open transactions */ int nVTrans; /* Allocated size of aVTrans */ VTable *pDisconnect; /* Disconnect these in next sqlite3_prepare() */ @@ -9287,6 +9559,7 @@ struct sqlite3 { #define SQLITE_IndexCover 0x10 /* Disable index covering table */ #define SQLITE_GroupByOrder 0x20 /* Disable GROUPBY cover of ORDERBY */ #define SQLITE_FactorOutConst 0x40 /* Disable factoring out constants */ +#define SQLITE_IdxRealAsInt 0x80 /* Store REAL as INT in indices */ #define SQLITE_OptMask 0xff /* Mask of all disablable opts */ /* @@ -9566,6 +9839,8 @@ struct VTable { Module *pMod; /* Pointer to module implementation */ sqlite3_vtab *pVtab; /* Pointer to vtab instance */ int nRef; /* Number of pointers to this structure */ + u8 bConstraint; /* True if constraints are supported */ + int iSavepoint; /* Depth of the SAVEPOINT stack */ VTable *pNext; /* Next in linked list (see above) */ }; @@ -10560,9 +10835,8 @@ struct Parse { ** each recursion */ int nVar; /* Number of '?' variables seen in the SQL so far */ - int nVarExpr; /* Number of used slots in apVarExpr[] */ - int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */ - Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */ + int nzVar; /* Number of available slots in azVar[] */ + char **azVar; /* Pointers to names of parameters */ Vdbe *pReprepare; /* VM being reprepared (sqlite3Reprepare()) */ int nAlias; /* Number of aliased result set columns */ int nAliasAlloc; /* Number of allocated slots for aAlias[] */ @@ -10754,6 +11028,7 @@ struct Sqlite3Config { int bMemstat; /* True to enable memory status */ int bCoreMutex; /* True to enable core mutexing */ int bFullMutex; /* True to enable full mutexing */ + int bOpenUri; /* True to interpret filenames as URIs */ int mxStrlen; /* Maximum string length */ int szLookaside; /* Default lookaside buffer size */ int nLookaside; /* Default lookaside buffer count */ @@ -10782,6 +11057,7 @@ struct Sqlite3Config { int nRefInitMutex; /* Number of users of pInitMutex */ void (*xLog)(void*,int,const char*); /* Function for logging */ void *pLogArg; /* First argument to xLog() */ + int bLocaltimeFault; /* True to fail localtime() calls */ }; /* @@ -11003,6 +11279,8 @@ SQLITE_PRIVATE void sqlite3AddColumnType(Parse*,Token*); SQLITE_PRIVATE void sqlite3AddDefaultValue(Parse*,ExprSpan*); SQLITE_PRIVATE void sqlite3AddCollateType(Parse*, Token*); SQLITE_PRIVATE void sqlite3EndTable(Parse*,Token*,Token*,Select*); +SQLITE_PRIVATE int sqlite3ParseUri(const char*,const char*,unsigned int*, + sqlite3_vfs**,char**,char **); SQLITE_PRIVATE Bitvec *sqlite3BitvecCreate(u32); SQLITE_PRIVATE int sqlite3BitvecTest(Bitvec*, u32); @@ -11207,7 +11485,7 @@ SQLITE_PRIVATE int sqlite3GetInt32(const char *, int*); SQLITE_PRIVATE int sqlite3Atoi(const char*); SQLITE_PRIVATE int sqlite3Utf16ByteLen(const void *pData, int nChar); SQLITE_PRIVATE int sqlite3Utf8CharLen(const char *pData, int nByte); -SQLITE_PRIVATE int sqlite3Utf8Read(const u8*, const u8**); +SQLITE_PRIVATE u32 sqlite3Utf8Read(const u8*, const u8**); /* ** Routines to read and write variable-length integers. These used to @@ -11253,6 +11531,7 @@ SQLITE_PRIVATE char sqlite3ExprAffinity(Expr *pExpr); SQLITE_PRIVATE int sqlite3Atoi64(const char*, i64*, int, u8); SQLITE_PRIVATE void sqlite3Error(sqlite3*, int, const char*,...); SQLITE_PRIVATE void *sqlite3HexToBlob(sqlite3*, const char *z, int n); +SQLITE_PRIVATE u8 sqlite3HexToInt(int h); SQLITE_PRIVATE int sqlite3TwoPartName(Parse *, Token *, Token *, Token **); SQLITE_PRIVATE const char *sqlite3ErrStr(int); SQLITE_PRIVATE int sqlite3ReadSchema(Parse *pParse); @@ -11268,6 +11547,12 @@ SQLITE_PRIVATE int sqlite3AddInt64(i64*,i64); SQLITE_PRIVATE int sqlite3SubInt64(i64*,i64); SQLITE_PRIVATE int sqlite3MulInt64(i64*,i64); SQLITE_PRIVATE int sqlite3AbsInt32(int); +#ifdef SQLITE_ENABLE_8_3_NAMES +SQLITE_PRIVATE void sqlite3FileSuffix3(const char*, char*); +#else +# define sqlite3FileSuffix3(X,Y) +#endif +SQLITE_PRIVATE u8 sqlite3GetBoolean(const char *z); SQLITE_PRIVATE const void *sqlite3ValueText(sqlite3_value*, u8); SQLITE_PRIVATE int sqlite3ValueBytes(sqlite3_value*, u8); @@ -11377,6 +11662,7 @@ SQLITE_PRIVATE int sqlite3Utf8To8(unsigned char*); # define sqlite3VtabLock(X) # define sqlite3VtabUnlock(X) # define sqlite3VtabUnlockList(X) +# define sqlite3VtabSavepoint(X, Y, Z) SQLITE_OK #else SQLITE_PRIVATE void sqlite3VtabClear(sqlite3 *db, Table*); SQLITE_PRIVATE int sqlite3VtabSync(sqlite3 *db, char **); @@ -11385,6 +11671,7 @@ SQLITE_PRIVATE int sqlite3VtabCommit(sqlite3 *db); SQLITE_PRIVATE void sqlite3VtabLock(VTable *); SQLITE_PRIVATE void sqlite3VtabUnlock(VTable *); SQLITE_PRIVATE void sqlite3VtabUnlockList(sqlite3*); +SQLITE_PRIVATE int sqlite3VtabSavepoint(sqlite3 *, int, int); # define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0) #endif SQLITE_PRIVATE void sqlite3VtabMakeWritable(Parse*,Table*); @@ -11691,7 +11978,9 @@ SQLITE_PRIVATE const unsigned char sqlite3CtypeMap[256] = { }; #endif - +#ifndef SQLITE_USE_URI +# define SQLITE_USE_URI 0 +#endif /* ** The following singleton contains the global configuration for @@ -11701,6 +11990,7 @@ SQLITE_PRIVATE SQLITE_WSD struct Sqlite3Config sqlite3Config = { SQLITE_DEFAULT_MEMSTATUS, /* bMemstat */ 1, /* bCoreMutex */ SQLITE_THREADSAFE==1, /* bFullMutex */ + SQLITE_USE_URI, /* bOpenUri */ 0x7ffffffe, /* mxStrlen */ 100, /* szLookaside */ 500, /* nLookaside */ @@ -11728,6 +12018,7 @@ SQLITE_PRIVATE SQLITE_WSD struct Sqlite3Config sqlite3Config = { 0, /* nRefInitMutex */ 0, /* xLog */ 0, /* pLogArg */ + 0, /* bLocaltimeFault */ }; @@ -12480,11 +12771,11 @@ struct Vdbe { Mem *aVar; /* Values for the OP_Variable opcode. */ char **azVar; /* Name of variables */ ynVar nVar; /* Number of entries in aVar[] */ + ynVar nzVar; /* Number of entries in azVar[] */ u32 cacheCtr; /* VdbeCursor row cache generation counter */ int pc; /* The program counter */ int rc; /* Value to return */ u8 errorAction; /* Recovery action to do in case of an error */ - u8 okVar; /* True if azVar[] has been initialized */ u8 explain; /* True if EXPLAIN present on SQL command */ u8 changeCntOn; /* True to update the change-counter */ u8 expired; /* True if the VM needs to be recompiled */ @@ -12878,22 +13169,6 @@ SQLITE_API int sqlite3_db_status( #ifndef SQLITE_OMIT_DATETIME_FUNCS -/* -** On recent Windows platforms, the localtime_s() function is available -** as part of the "Secure CRT". It is essentially equivalent to -** localtime_r() available under most POSIX platforms, except that the -** order of the parameters is reversed. -** -** See http://msdn.microsoft.com/en-us/library/a442x3ye(VS.80).aspx. -** -** If the user has not indicated to use localtime_r() or localtime_s() -** already, check for an MSVC build environment that provides -** localtime_s(). -*/ -#if !defined(HAVE_LOCALTIME_R) && !defined(HAVE_LOCALTIME_S) && \ - defined(_MSC_VER) && defined(_CRT_INSECURE_DEPRECATE) -#define HAVE_LOCALTIME_S 1 -#endif /* ** A structure for holding a single date and time. @@ -13239,15 +13514,83 @@ static void clearYMD_HMS_TZ(DateTime *p){ p->validTZ = 0; } +/* +** On recent Windows platforms, the localtime_s() function is available +** as part of the "Secure CRT". It is essentially equivalent to +** localtime_r() available under most POSIX platforms, except that the +** order of the parameters is reversed. +** +** See http://msdn.microsoft.com/en-us/library/a442x3ye(VS.80).aspx. +** +** If the user has not indicated to use localtime_r() or localtime_s() +** already, check for an MSVC build environment that provides +** localtime_s(). +*/ +#if !defined(HAVE_LOCALTIME_R) && !defined(HAVE_LOCALTIME_S) && \ + defined(_MSC_VER) && defined(_CRT_INSECURE_DEPRECATE) +#define HAVE_LOCALTIME_S 1 +#endif + +#ifndef SQLITE_OMIT_LOCALTIME +/* +** The following routine implements the rough equivalent of localtime_r() +** using whatever operating-system specific localtime facility that +** is available. This routine returns 0 on success and +** non-zero on any kind of error. +** +** If the sqlite3GlobalConfig.bLocaltimeFault variable is true then this +** routine will always fail. +*/ +static int osLocaltime(time_t *t, struct tm *pTm){ + int rc; +#if (!defined(HAVE_LOCALTIME_R) || !HAVE_LOCALTIME_R) \ + && (!defined(HAVE_LOCALTIME_S) || !HAVE_LOCALTIME_S) + struct tm *pX; + sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER); + sqlite3_mutex_enter(mutex); + pX = localtime(t); +#ifndef SQLITE_OMIT_BUILTIN_TEST + if( sqlite3GlobalConfig.bLocaltimeFault ) pX = 0; +#endif + if( pX ) *pTm = *pX; + sqlite3_mutex_leave(mutex); + rc = pX==0; +#else +#ifndef SQLITE_OMIT_BUILTIN_TEST + if( sqlite3GlobalConfig.bLocaltimeFault ) return 1; +#endif +#if defined(HAVE_LOCALTIME_R) && HAVE_LOCALTIME_R + rc = localtime_r(t, pTm)==0; +#else + rc = localtime_s(pTm, t); +#endif /* HAVE_LOCALTIME_R */ +#endif /* HAVE_LOCALTIME_R || HAVE_LOCALTIME_S */ + return rc; +} +#endif /* SQLITE_OMIT_LOCALTIME */ + + #ifndef SQLITE_OMIT_LOCALTIME /* -** Compute the difference (in milliseconds) -** between localtime and UTC (a.k.a. GMT) -** for the time value p where p is in UTC. +** Compute the difference (in milliseconds) between localtime and UTC +** (a.k.a. GMT) for the time value p where p is in UTC. If no error occurs, +** return this value and set *pRc to SQLITE_OK. +** +** Or, if an error does occur, set *pRc to SQLITE_ERROR. The returned value +** is undefined in this case. */ -static sqlite3_int64 localtimeOffset(DateTime *p){ +static sqlite3_int64 localtimeOffset( + DateTime *p, /* Date at which to calculate offset */ + sqlite3_context *pCtx, /* Write error here if one occurs */ + int *pRc /* OUT: Error code. SQLITE_OK or ERROR */ +){ DateTime x, y; time_t t; + struct tm sLocal; + + /* Initialize the contents of sLocal to avoid a compiler warning. */ + memset(&sLocal, 0, sizeof(sLocal)); + x = *p; computeYMD_HMS(&x); if( x.Y<1971 || x.Y>=2038 ){ @@ -13265,47 +13608,23 @@ static sqlite3_int64 localtimeOffset(DateTime *p){ x.validJD = 0; computeJD(&x); t = (time_t)(x.iJD/1000 - 21086676*(i64)10000); -#ifdef HAVE_LOCALTIME_R - { - struct tm sLocal; - localtime_r(&t, &sLocal); - y.Y = sLocal.tm_year + 1900; - y.M = sLocal.tm_mon + 1; - y.D = sLocal.tm_mday; - y.h = sLocal.tm_hour; - y.m = sLocal.tm_min; - y.s = sLocal.tm_sec; - } -#elif defined(HAVE_LOCALTIME_S) && HAVE_LOCALTIME_S - { - struct tm sLocal; - localtime_s(&sLocal, &t); - y.Y = sLocal.tm_year + 1900; - y.M = sLocal.tm_mon + 1; - y.D = sLocal.tm_mday; - y.h = sLocal.tm_hour; - y.m = sLocal.tm_min; - y.s = sLocal.tm_sec; - } -#else - { - struct tm *pTm; - sqlite3_mutex_enter(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER)); - pTm = localtime(&t); - y.Y = pTm->tm_year + 1900; - y.M = pTm->tm_mon + 1; - y.D = pTm->tm_mday; - y.h = pTm->tm_hour; - y.m = pTm->tm_min; - y.s = pTm->tm_sec; - sqlite3_mutex_leave(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER)); + if( osLocaltime(&t, &sLocal) ){ + sqlite3_result_error(pCtx, "local time unavailable", -1); + *pRc = SQLITE_ERROR; + return 0; } -#endif + y.Y = sLocal.tm_year + 1900; + y.M = sLocal.tm_mon + 1; + y.D = sLocal.tm_mday; + y.h = sLocal.tm_hour; + y.m = sLocal.tm_min; + y.s = sLocal.tm_sec; y.validYMD = 1; y.validHMS = 1; y.validJD = 0; y.validTZ = 0; computeJD(&y); + *pRc = SQLITE_OK; return y.iJD - x.iJD; } #endif /* SQLITE_OMIT_LOCALTIME */ @@ -13329,9 +13648,12 @@ static sqlite3_int64 localtimeOffset(DateTime *p){ ** localtime ** utc ** -** Return 0 on success and 1 if there is any kind of error. +** Return 0 on success and 1 if there is any kind of error. If the error +** is in a system call (i.e. localtime()), then an error message is written +** to context pCtx. If the error is an unrecognized modifier, no error is +** written to pCtx. */ -static int parseModifier(const char *zMod, DateTime *p){ +static int parseModifier(sqlite3_context *pCtx, const char *zMod, DateTime *p){ int rc = 1; int n; double r; @@ -13351,9 +13673,8 @@ static int parseModifier(const char *zMod, DateTime *p){ */ if( strcmp(z, "localtime")==0 ){ computeJD(p); - p->iJD += localtimeOffset(p); + p->iJD += localtimeOffset(p, pCtx, &rc); clearYMD_HMS_TZ(p); - rc = 0; } break; } @@ -13374,11 +13695,12 @@ static int parseModifier(const char *zMod, DateTime *p){ else if( strcmp(z, "utc")==0 ){ sqlite3_int64 c1; computeJD(p); - c1 = localtimeOffset(p); - p->iJD -= c1; - clearYMD_HMS_TZ(p); - p->iJD += c1 - localtimeOffset(p); - rc = 0; + c1 = localtimeOffset(p, pCtx, &rc); + if( rc==SQLITE_OK ){ + p->iJD -= c1; + clearYMD_HMS_TZ(p); + p->iJD += c1 - localtimeOffset(p, pCtx, &rc); + } } #endif break; @@ -13559,9 +13881,8 @@ static int isDate( } } for(i=1; i<argc; i++){ - if( (z = sqlite3_value_text(argv[i]))==0 || parseModifier((char*)z, p) ){ - return 1; - } + z = sqlite3_value_text(argv[i]); + if( z==0 || parseModifier(context, (char*)z, p) ) return 1; } return 0; } @@ -17950,7 +18271,7 @@ static int mallocWithAlarm(int n, void **pp){ sqlite3StatusSet(SQLITE_STATUS_MALLOC_SIZE, n); if( mem0.alarmCallback!=0 ){ int nUsed = sqlite3StatusValue(SQLITE_STATUS_MEMORY_USED); - if( nUsed+nFull >= mem0.alarmThreshold ){ + if( nUsed >= mem0.alarmThreshold - nFull ){ mem0.nearlyFull = 1; sqlite3MallocAlarm(nFull); }else{ @@ -18191,7 +18512,7 @@ SQLITE_PRIVATE void sqlite3DbFree(sqlite3 *db, void *p){ ** Change the size of an existing memory allocation */ SQLITE_PRIVATE void *sqlite3Realloc(void *pOld, int nBytes){ - int nOld, nNew; + int nOld, nNew, nDiff; void *pNew; if( pOld==0 ){ return sqlite3Malloc(nBytes); /* IMP: R-28354-25769 */ @@ -18214,9 +18535,10 @@ SQLITE_PRIVATE void *sqlite3Realloc(void *pOld, int nBytes){ }else if( sqlite3GlobalConfig.bMemstat ){ sqlite3_mutex_enter(mem0.mutex); sqlite3StatusSet(SQLITE_STATUS_MALLOC_SIZE, nBytes); - if( sqlite3StatusValue(SQLITE_STATUS_MEMORY_USED)+nNew-nOld >= - mem0.alarmThreshold ){ - sqlite3MallocAlarm(nNew-nOld); + nDiff = nNew - nOld; + if( sqlite3StatusValue(SQLITE_STATUS_MEMORY_USED) >= + mem0.alarmThreshold-nDiff ){ + sqlite3MallocAlarm(nDiff); } assert( sqlite3MemdebugHasType(pOld, MEMTYPE_HEAP) ); assert( sqlite3MemdebugNoType(pOld, ~MEMTYPE_HEAP) ); @@ -19801,7 +20123,7 @@ static const unsigned char sqlite3Utf8Trans1[] = { || (c&0xFFFFF800)==0xD800 \ || (c&0xFFFFFFFE)==0xFFFE ){ c = 0xFFFD; } \ } -SQLITE_PRIVATE int sqlite3Utf8Read( +SQLITE_PRIVATE u32 sqlite3Utf8Read( const unsigned char *zIn, /* First byte of UTF-8 character */ const unsigned char **pzNext /* Write first byte past UTF-8 char here */ ){ @@ -21182,13 +21504,12 @@ SQLITE_PRIVATE void sqlite3Put4byte(unsigned char *p, u32 v){ -#if !defined(SQLITE_OMIT_BLOB_LITERAL) || defined(SQLITE_HAS_CODEC) /* ** Translate a single byte of Hex into an integer. ** This routine only works if h really is a valid hexadecimal ** character: 0..9a..fA..F */ -static u8 hexToInt(int h){ +SQLITE_PRIVATE u8 sqlite3HexToInt(int h){ assert( (h>='0' && h<='9') || (h>='a' && h<='f') || (h>='A' && h<='F') ); #ifdef SQLITE_ASCII h += 9*(1&(h>>6)); @@ -21198,7 +21519,6 @@ static u8 hexToInt(int h){ #endif return (u8)(h & 0xf); } -#endif /* !SQLITE_OMIT_BLOB_LITERAL || SQLITE_HAS_CODEC */ #if !defined(SQLITE_OMIT_BLOB_LITERAL) || defined(SQLITE_HAS_CODEC) /* @@ -21215,7 +21535,7 @@ SQLITE_PRIVATE void *sqlite3HexToBlob(sqlite3 *db, const char *z, int n){ n--; if( zBlob ){ for(i=0; i<n; i+=2){ - zBlob[i/2] = (hexToInt(z[i])<<4) | hexToInt(z[i+1]); + zBlob[i/2] = (sqlite3HexToInt(z[i])<<4) | sqlite3HexToInt(z[i+1]); } zBlob[i/2] = 0; } @@ -21348,6 +21668,32 @@ SQLITE_PRIVATE int sqlite3AbsInt32(int x){ return -x; } +#ifdef SQLITE_ENABLE_8_3_NAMES +/* +** If SQLITE_ENABLE_8_3_NAME is set at compile-time and if the database +** filename in zBaseFilename is a URI with the "8_3_names=1" parameter and +** if filename in z[] has a suffix (a.k.a. "extension") that is longer than +** three characters, then shorten the suffix on z[] to be the last three +** characters of the original suffix. +** +** Examples: +** +** test.db-journal => test.nal +** test.db-wal => test.wal +** test.db-shm => test.shm +*/ +SQLITE_PRIVATE void sqlite3FileSuffix3(const char *zBaseFilename, char *z){ + const char *zOk; + zOk = sqlite3_uri_parameter(zBaseFilename, "8_3_names"); + if( zOk && sqlite3GetBoolean(zOk) ){ + int i, sz; + sz = sqlite3Strlen30(z); + for(i=sz-1; i>0 && z[i]!='/' && z[i]!='.'; i--){} + if( z[i]=='.' && ALWAYS(sz>i+4) ) memcpy(&z[i+1], &z[sz-3], 4); + } +} +#endif + /************** End of util.c ************************************************/ /************** Begin file hash.c ********************************************/ /* @@ -24054,6 +24400,10 @@ SQLITE_API int sqlite3_os_end(void){ # include <sys/mount.h> #endif +#ifdef HAVE_UTIME +# include <utime.h> +#endif + /* ** Allowed values of unixFile.fsFlags */ @@ -24402,6 +24752,18 @@ SQLITE_API int sqlite3_open_file_count = 0; #endif /* +** Different Unix systems declare open() in different ways. Same use +** open(const char*,int,mode_t). Others use open(const char*,int,...). +** The difference is important when using a pointer to the function. +** +** The safest way to deal with the problem is to always use this wrapper +** which always has the same well-defined interface. +*/ +static int posixOpen(const char *zFile, int flags, int mode){ + return open(zFile, flags, mode); +} + +/* ** Many system calls are accessed through pointer-to-functions so that ** they may be overridden at runtime to facilitate fault injection during ** testing and sandboxing. The following array holds the names and pointers @@ -24412,8 +24774,8 @@ static struct unix_syscall { sqlite3_syscall_ptr pCurrent; /* Current value of the system call */ sqlite3_syscall_ptr pDefault; /* Default value */ } aSyscall[] = { - { "open", (sqlite3_syscall_ptr)open, 0 }, -#define osOpen ((int(*)(const char*,int,...))aSyscall[0].pCurrent) + { "open", (sqlite3_syscall_ptr)posixOpen, 0 }, +#define osOpen ((int(*)(const char*,int,int))aSyscall[0].pCurrent) { "close", (sqlite3_syscall_ptr)close, 0 }, #define osClose ((int(*)(int))aSyscall[1].pCurrent) @@ -24450,7 +24812,7 @@ static struct unix_syscall { { "read", (sqlite3_syscall_ptr)read, 0 }, #define osRead ((ssize_t(*)(int,void*,size_t))aSyscall[8].pCurrent) -#if defined(USE_PREAD) || defined(SQLITE_ENABLE_LOCKING_STYLE) +#if defined(USE_PREAD) || SQLITE_ENABLE_LOCKING_STYLE { "pread", (sqlite3_syscall_ptr)pread, 0 }, #else { "pread", (sqlite3_syscall_ptr)0, 0 }, @@ -24467,7 +24829,7 @@ static struct unix_syscall { { "write", (sqlite3_syscall_ptr)write, 0 }, #define osWrite ((ssize_t(*)(int,const void*,size_t))aSyscall[11].pCurrent) -#if defined(USE_PREAD) || defined(SQLITE_ENABLE_LOCKING_STYLE) +#if defined(USE_PREAD) || SQLITE_ENABLE_LOCKING_STYLE { "pwrite", (sqlite3_syscall_ptr)pwrite, 0 }, #else { "pwrite", (sqlite3_syscall_ptr)0, 0 }, @@ -25053,7 +25415,7 @@ struct unixInodeInfo { UnixUnusedFd *pUnused; /* Unused file descriptors to close */ unixInodeInfo *pNext; /* List of all unixInodeInfo objects */ unixInodeInfo *pPrev; /* .... doubly linked */ -#if defined(SQLITE_ENABLE_LOCKING_STYLE) +#if SQLITE_ENABLE_LOCKING_STYLE unsigned long long sharedByte; /* for AFP simulated shared lock */ #endif #if OS_VXWORKS @@ -26047,8 +26409,10 @@ static int dotlockLock(sqlite3_file *id, int eFileLock) { */ if( pFile->eFileLock > NO_LOCK ){ pFile->eFileLock = eFileLock; -#if !OS_VXWORKS /* Always update the timestamp on the old file */ +#ifdef HAVE_UTIME + utime(zLockFile, NULL); +#else utimes(zLockFile, NULL); #endif return SQLITE_OK; @@ -27210,7 +27574,7 @@ static int unixWrite( SimulateDiskfullError(( wrote=0, amt=1 )); if( amt>0 ){ - if( wrote<0 ){ + if( wrote<0 && pFile->lastErrno!=ENOSPC ){ /* lastErrno set by seekAndWrite */ return SQLITE_IOERR_WRITE; }else{ @@ -27645,7 +28009,8 @@ struct unixShmNode { char *zFilename; /* Name of the mmapped file */ int h; /* Open file descriptor */ int szRegion; /* Size of shared-memory regions */ - int nRegion; /* Size of array apRegion */ + u16 nRegion; /* Size of array apRegion */ + u8 isReadonly; /* True if read-only */ char **apRegion; /* Array of mapped shared-memory regions */ int nRef; /* Number of unixShm objects pointing to this */ unixShm *pFirst; /* All unixShm objects pointing to this */ @@ -27877,6 +28242,7 @@ static int unixOpenSharedMemory(unixFile *pDbFd){ (u32)sStat.st_ino, (u32)sStat.st_dev); #else sqlite3_snprintf(nShmFilename, zShmFilename, "%s-shm", pDbFd->zPath); + sqlite3FileSuffix3(pDbFd->zPath, zShmFilename); #endif pShmNode->h = -1; pDbFd->pInode->pShmNode = pShmNode; @@ -27891,8 +28257,17 @@ static int unixOpenSharedMemory(unixFile *pDbFd){ pShmNode->h = robust_open(zShmFilename, O_RDWR|O_CREAT, (sStat.st_mode & 0777)); if( pShmNode->h<0 ){ - rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShmFilename); - goto shm_open_err; + const char *zRO; + zRO = sqlite3_uri_parameter(pDbFd->zPath, "readonly_shm"); + if( zRO && sqlite3GetBoolean(zRO) ){ + pShmNode->h = robust_open(zShmFilename, O_RDONLY, + (sStat.st_mode & 0777)); + pShmNode->isReadonly = 1; + } + if( pShmNode->h<0 ){ + rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShmFilename); + goto shm_open_err; + } } /* Check to see if another process is holding the dead-man switch. @@ -28031,11 +28406,12 @@ static int unixShmMap( while(pShmNode->nRegion<=iRegion){ void *pMem; if( pShmNode->h>=0 ){ - pMem = mmap(0, szRegion, PROT_READ|PROT_WRITE, + pMem = mmap(0, szRegion, + pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE, MAP_SHARED, pShmNode->h, pShmNode->nRegion*szRegion ); if( pMem==MAP_FAILED ){ - rc = SQLITE_IOERR; + rc = unixLogError(SQLITE_IOERR_SHMMAP, "mmap", pShmNode->zFilename); goto shmpage_out; } }else{ @@ -28057,6 +28433,7 @@ shmpage_out: }else{ *pp = 0; } + if( pShmNode->isReadonly && rc==SQLITE_OK ) rc = SQLITE_READONLY; sqlite3_mutex_leave(pShmNode->mutex); return rc; } @@ -28910,6 +29287,11 @@ static UnixUnusedFd *findReusableFd(const char *zPath, int flags){ ** corresponding database file and sets *pMode to this value. Whenever ** possible, WAL and journal files are created using the same permissions ** as the associated database file. +** +** If the SQLITE_ENABLE_8_3_NAMES option is enabled, then the +** original filename is unavailable. But 8_3_NAMES is only used for +** FAT filesystems and permissions do not matter there, so just use +** the default permissions. */ static int findCreateFileMode( const char *zPath, /* Path of file (possibly) being created */ @@ -28917,6 +29299,7 @@ static int findCreateFileMode( mode_t *pMode /* OUT: Permissions to open file with */ ){ int rc = SQLITE_OK; /* Return Code */ + *pMode = SQLITE_DEFAULT_FILE_PERMISSIONS; if( flags & (SQLITE_OPEN_WAL|SQLITE_OPEN_MAIN_JOURNAL) ){ char zDb[MAX_PATHNAME+1]; /* Database file path */ int nDb; /* Number of valid bytes in zDb */ @@ -28928,15 +29311,15 @@ static int findCreateFileMode( ** ** "<path to db>-journal" ** "<path to db>-wal" - ** "<path to db>-journal-NNNN" - ** "<path to db>-wal-NNNN" + ** "<path to db>-journalNN" + ** "<path to db>-walNN" ** - ** where NNNN is a 4 digit decimal number. The NNNN naming schemes are + ** where NN is a 4 digit decimal number. The NN naming schemes are ** used by the test_multiplex.c module. */ nDb = sqlite3Strlen30(zPath) - 1; - while( nDb>0 && zPath[nDb]!='l' ) nDb--; - nDb -= ((flags & SQLITE_OPEN_WAL) ? 3 : 7); + while( nDb>0 && zPath[nDb]!='-' ) nDb--; + if( nDb==0 ) return SQLITE_OK; memcpy(zDb, zPath, nDb); zDb[nDb] = '\0'; @@ -28947,8 +29330,6 @@ static int findCreateFileMode( } }else if( flags & SQLITE_OPEN_DELETEONCLOSE ){ *pMode = 0600; - }else{ - *pMode = SQLITE_DEFAULT_FILE_PERMISSIONS; } return rc; } @@ -31156,6 +31537,7 @@ struct winFile { #endif }; + /* ** Forward prototypes. */ @@ -31323,7 +31705,7 @@ SQLITE_API char *sqlite3_win32_mbcs_to_utf8(const char *zFilename){ ** Convert UTF-8 to multibyte character string. Space to hold the ** returned string is obtained from malloc(). */ -static char *utf8ToMbcs(const char *zFilename){ +SQLITE_API char *sqlite3_win32_utf8_to_mbcs(const char *zFilename){ char *zFilenameMbcs; WCHAR *zTmpWide; @@ -31336,6 +31718,109 @@ static char *utf8ToMbcs(const char *zFilename){ return zFilenameMbcs; } + +/* +** The return value of getLastErrorMsg +** is zero if the error message fits in the buffer, or non-zero +** otherwise (if the message was truncated). +*/ +static int getLastErrorMsg(int nBuf, char *zBuf){ + /* FormatMessage returns 0 on failure. Otherwise it + ** returns the number of TCHARs written to the output + ** buffer, excluding the terminating null char. + */ + DWORD error = GetLastError(); + DWORD dwLen = 0; + char *zOut = 0; + + if( isNT() ){ + WCHAR *zTempWide = NULL; + dwLen = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, + NULL, + error, + 0, + (LPWSTR) &zTempWide, + 0, + 0); + if( dwLen > 0 ){ + /* allocate a buffer and convert to UTF8 */ + zOut = unicodeToUtf8(zTempWide); + /* free the system buffer allocated by FormatMessage */ + LocalFree(zTempWide); + } +/* isNT() is 1 if SQLITE_OS_WINCE==1, so this else is never executed. +** Since the ASCII version of these Windows API do not exist for WINCE, +** it's important to not reference them for WINCE builds. +*/ +#if SQLITE_OS_WINCE==0 + }else{ + char *zTemp = NULL; + dwLen = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, + NULL, + error, + 0, + (LPSTR) &zTemp, + 0, + 0); + if( dwLen > 0 ){ + /* allocate a buffer and convert to UTF8 */ + zOut = sqlite3_win32_mbcs_to_utf8(zTemp); + /* free the system buffer allocated by FormatMessage */ + LocalFree(zTemp); + } +#endif + } + if( 0 == dwLen ){ + sqlite3_snprintf(nBuf, zBuf, "OsError 0x%x (%u)", error, error); + }else{ + /* copy a maximum of nBuf chars to output buffer */ + sqlite3_snprintf(nBuf, zBuf, "%s", zOut); + /* free the UTF8 buffer */ + free(zOut); + } + return 0; +} + +/* +** +** This function - winLogErrorAtLine() - is only ever called via the macro +** winLogError(). +** +** This routine is invoked after an error occurs in an OS function. +** It logs a message using sqlite3_log() containing the current value of +** error code and, if possible, the human-readable equivalent from +** FormatMessage. +** +** The first argument passed to the macro should be the error code that +** will be returned to SQLite (e.g. SQLITE_IOERR_DELETE, SQLITE_CANTOPEN). +** The two subsequent arguments should be the name of the OS function that +** failed and the the associated file-system path, if any. +*/ +#define winLogError(a,b,c) winLogErrorAtLine(a,b,c,__LINE__) +static int winLogErrorAtLine( + int errcode, /* SQLite error code */ + const char *zFunc, /* Name of OS function that failed */ + const char *zPath, /* File path associated with error */ + int iLine /* Source line number where error occurred */ +){ + char zMsg[500]; /* Human readable error text */ + int i; /* Loop counter */ + DWORD iErrno = GetLastError(); /* Error code */ + + zMsg[0] = 0; + getLastErrorMsg(sizeof(zMsg), zMsg); + assert( errcode!=SQLITE_OK ); + if( zPath==0 ) zPath = ""; + for(i=0; zMsg[i] && zMsg[i]!='\r' && zMsg[i]!='\n'; i++){} + zMsg[i] = 0; + sqlite3_log(errcode, + "os_win.c:%d: (%d) %s(%s) - %s", + iLine, iErrno, zFunc, zPath, zMsg + ); + + return errcode; +} + #if SQLITE_OS_WINCE /************************************************************************* ** This section contains code for WinCE only. @@ -31412,6 +31897,7 @@ static BOOL winceCreateLock(const char *zFilename, winFile *pFile){ pFile->hMutex = CreateMutexW(NULL, FALSE, zName); if (!pFile->hMutex){ pFile->lastErrno = GetLastError(); + winLogError(SQLITE_ERROR, "winceCreateLock1", zFilename); free(zName); return FALSE; } @@ -31443,6 +31929,7 @@ static BOOL winceCreateLock(const char *zFilename, winFile *pFile){ /* If mapping failed, close the shared memory handle and erase it */ if (!pFile->shared){ pFile->lastErrno = GetLastError(); + winLogError(SQLITE_ERROR, "winceCreateLock2", zFilename); CloseHandle(pFile->hShared); pFile->hShared = NULL; } @@ -31688,6 +32175,7 @@ static int seekWinFile(winFile *pFile, sqlite3_int64 iOffset){ dwRet = SetFilePointer(pFile->h, lowerBits, &upperBits, FILE_BEGIN); if( (dwRet==INVALID_SET_FILE_POINTER && GetLastError()!=NO_ERROR) ){ pFile->lastErrno = GetLastError(); + winLogError(SQLITE_IOERR_SEEK, "seekWinFile", pFile->zPath); return 1; } @@ -31733,7 +32221,8 @@ static int winClose(sqlite3_file *id){ #endif OSTRACE(("CLOSE %d %s\n", pFile->h, rc ? "ok" : "failed")); OpenCounter(-1); - return rc ? SQLITE_OK : SQLITE_IOERR; + return rc ? SQLITE_OK + : winLogError(SQLITE_IOERR_CLOSE, "winClose", pFile->zPath); } /* @@ -31759,7 +32248,7 @@ static int winRead( } if( !ReadFile(pFile->h, pBuf, amt, &nRead, 0) ){ pFile->lastErrno = GetLastError(); - return SQLITE_IOERR_READ; + return winLogError(SQLITE_IOERR_READ, "winRead", pFile->zPath); } if( nRead<(DWORD)amt ){ /* Unread parts of the buffer must be zero-filled */ @@ -31807,10 +32296,11 @@ static int winWrite( } if( rc ){ - if( pFile->lastErrno==ERROR_HANDLE_DISK_FULL ){ + if( ( pFile->lastErrno==ERROR_HANDLE_DISK_FULL ) + || ( pFile->lastErrno==ERROR_DISK_FULL )){ return SQLITE_FULL; } - return SQLITE_IOERR_WRITE; + return winLogError(SQLITE_IOERR_WRITE, "winWrite", pFile->zPath); } return SQLITE_OK; } @@ -31838,10 +32328,10 @@ static int winTruncate(sqlite3_file *id, sqlite3_int64 nByte){ /* SetEndOfFile() returns non-zero when successful, or zero when it fails. */ if( seekWinFile(pFile, nByte) ){ - rc = SQLITE_IOERR_TRUNCATE; + rc = winLogError(SQLITE_IOERR_TRUNCATE, "winTruncate1", pFile->zPath); }else if( 0==SetEndOfFile(pFile->h) ){ pFile->lastErrno = GetLastError(); - rc = SQLITE_IOERR_TRUNCATE; + rc = winLogError(SQLITE_IOERR_TRUNCATE, "winTruncate2", pFile->zPath); } OSTRACE(("TRUNCATE %d %lld %s\n", pFile->h, nByte, rc ? "failed" : "ok")); @@ -31863,6 +32353,7 @@ SQLITE_API int sqlite3_fullsync_count = 0; static int winSync(sqlite3_file *id, int flags){ #if !defined(NDEBUG) || !defined(SQLITE_NO_SYNC) || defined(SQLITE_DEBUG) winFile *pFile = (winFile*)id; + BOOL rc; #else UNUSED_PARAMETER(id); #endif @@ -31875,32 +32366,33 @@ static int winSync(sqlite3_file *id, int flags){ OSTRACE(("SYNC %d lock=%d\n", pFile->h, pFile->locktype)); + /* Unix cannot, but some systems may return SQLITE_FULL from here. This + ** line is to test that doing so does not cause any problems. + */ + SimulateDiskfullError( return SQLITE_FULL ); + #ifndef SQLITE_TEST UNUSED_PARAMETER(flags); #else - if( flags & SQLITE_SYNC_FULL ){ + if( (flags&0x0F)==SQLITE_SYNC_FULL ){ sqlite3_fullsync_count++; } sqlite3_sync_count++; #endif - /* Unix cannot, but some systems may return SQLITE_FULL from here. This - ** line is to test that doing so does not cause any problems. - */ - SimulateDiskfullError( return SQLITE_FULL ); - SimulateIOError( return SQLITE_IOERR; ); - /* If we compiled with the SQLITE_NO_SYNC flag, then syncing is a ** no-op */ #ifdef SQLITE_NO_SYNC return SQLITE_OK; #else - if( FlushFileBuffers(pFile->h) ){ + rc = FlushFileBuffers(pFile->h); + SimulateIOError( rc=FALSE ); + if( rc ){ return SQLITE_OK; }else{ pFile->lastErrno = GetLastError(); - return SQLITE_IOERR; + return winLogError(SQLITE_IOERR_FSYNC, "winSync", pFile->zPath); } #endif } @@ -31921,7 +32413,7 @@ static int winFileSize(sqlite3_file *id, sqlite3_int64 *pSize){ && ((error = GetLastError()) != NO_ERROR) ) { pFile->lastErrno = error; - return SQLITE_IOERR_FSTAT; + return winLogError(SQLITE_IOERR_FSTAT, "winFileSize", pFile->zPath); } *pSize = (((sqlite3_int64)upperBits)<<32) + lowerBits; return SQLITE_OK; @@ -31960,6 +32452,7 @@ static int getReadLock(winFile *pFile){ } if( res == 0 ){ pFile->lastErrno = GetLastError(); + /* No need to log a failure to lock */ } return res; } @@ -31978,8 +32471,9 @@ static int unlockReadLock(winFile *pFile){ res = UnlockFile(pFile->h, SHARED_FIRST + pFile->sharedLockByte, 0, 1, 0); #endif } - if( res == 0 ){ + if( res==0 && GetLastError()!=ERROR_NOT_LOCKED ){ pFile->lastErrno = GetLastError(); + winLogError(SQLITE_IOERR_UNLOCK, "unlockReadLock", pFile->zPath); } return res; } @@ -32180,7 +32674,7 @@ static int winUnlock(sqlite3_file *id, int locktype){ if( locktype==SHARED_LOCK && !getReadLock(pFile) ){ /* This should never happen. We should always be able to ** reacquire the read lock */ - rc = SQLITE_IOERR_UNLOCK; + rc = winLogError(SQLITE_IOERR_UNLOCK, "winUnlock", pFile->zPath); } } if( type>=RESERVED_LOCK ){ @@ -32495,6 +32989,7 @@ static int winOpenSharedMemory(winFile *pDbFd){ memset(pNew, 0, sizeof(*pNew)); pNew->zFilename = (char*)&pNew[1]; sqlite3_snprintf(nName+15, pNew->zFilename, "%s-shm", pDbFd->zPath); + sqlite3FileSuffix3(pDbFd->zPath, pNew->zFilename); /* Look to see if there is an existing winShmNode that can be used. ** If no matching winShmNode currently exists, create a new one. @@ -32537,7 +33032,7 @@ static int winOpenSharedMemory(winFile *pDbFd){ if( winShmSystemLock(pShmNode, _SHM_WRLCK, WIN_SHM_DMS, 1)==SQLITE_OK ){ rc = winTruncate((sqlite3_file *)&pShmNode->hFile, 0); if( rc!=SQLITE_OK ){ - rc = SQLITE_IOERR_SHMOPEN; + rc = winLogError(SQLITE_IOERR_SHMOPEN, "winOpenShm", pDbFd->zPath); } } if( rc==SQLITE_OK ){ @@ -32796,7 +33291,7 @@ static int winShmMap( */ rc = winFileSize((sqlite3_file *)&pShmNode->hFile, &sz); if( rc!=SQLITE_OK ){ - rc = SQLITE_IOERR_SHMSIZE; + rc = winLogError(SQLITE_IOERR_SHMSIZE, "winShmMap1", pDbFd->zPath); goto shmpage_out; } @@ -32810,7 +33305,7 @@ static int winShmMap( if( !isWrite ) goto shmpage_out; rc = winTruncate((sqlite3_file *)&pShmNode->hFile, nByte); if( rc!=SQLITE_OK ){ - rc = SQLITE_IOERR_SHMSIZE; + rc = winLogError(SQLITE_IOERR_SHMSIZE, "winShmMap2", pDbFd->zPath); goto shmpage_out; } } @@ -32847,7 +33342,7 @@ static int winShmMap( } if( !pMap ){ pShmNode->lastErrno = GetLastError(); - rc = SQLITE_IOERR; + rc = winLogError(SQLITE_IOERR_SHMMAP, "winShmMap3", pDbFd->zPath); if( hMap ) CloseHandle(hMap); goto shmpage_out; } @@ -32929,7 +33424,7 @@ static void *convertUtf8Filename(const char *zFilename){ */ #if SQLITE_OS_WINCE==0 }else{ - zConverted = utf8ToMbcs(zFilename); + zConverted = sqlite3_win32_utf8_to_mbcs(zFilename); #endif } /* caller will handle out of memory */ @@ -33010,68 +33505,6 @@ static int getTempname(int nBuf, char *zBuf){ } /* -** The return value of getLastErrorMsg -** is zero if the error message fits in the buffer, or non-zero -** otherwise (if the message was truncated). -*/ -static int getLastErrorMsg(int nBuf, char *zBuf){ - /* FormatMessage returns 0 on failure. Otherwise it - ** returns the number of TCHARs written to the output - ** buffer, excluding the terminating null char. - */ - DWORD error = GetLastError(); - DWORD dwLen = 0; - char *zOut = 0; - - if( isNT() ){ - WCHAR *zTempWide = NULL; - dwLen = FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, - NULL, - error, - 0, - (LPWSTR) &zTempWide, - 0, - 0); - if( dwLen > 0 ){ - /* allocate a buffer and convert to UTF8 */ - zOut = unicodeToUtf8(zTempWide); - /* free the system buffer allocated by FormatMessage */ - LocalFree(zTempWide); - } -/* isNT() is 1 if SQLITE_OS_WINCE==1, so this else is never executed. -** Since the ASCII version of these Windows API do not exist for WINCE, -** it's important to not reference them for WINCE builds. -*/ -#if SQLITE_OS_WINCE==0 - }else{ - char *zTemp = NULL; - dwLen = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, - NULL, - error, - 0, - (LPSTR) &zTemp, - 0, - 0); - if( dwLen > 0 ){ - /* allocate a buffer and convert to UTF8 */ - zOut = sqlite3_win32_mbcs_to_utf8(zTemp); - /* free the system buffer allocated by FormatMessage */ - LocalFree(zTemp); - } -#endif - } - if( 0 == dwLen ){ - sqlite3_snprintf(nBuf, zBuf, "OsError 0x%x (%u)", error, error); - }else{ - /* copy a maximum of nBuf chars to output buffer */ - sqlite3_snprintf(nBuf, zBuf, "%s", zOut); - /* free the UTF8 buffer */ - free(zOut); - } - return 0; -} - -/* ** Open a file. */ static int winOpen( @@ -33242,6 +33675,7 @@ static int winOpen( if( h==INVALID_HANDLE_VALUE ){ pFile->lastErrno = GetLastError(); + winLogError(SQLITE_CANTOPEN, "winOpen", zUtf8Name); free(zConverted); if( isReadWrite ){ return winOpen(pVfs, zName, id, @@ -33345,7 +33779,8 @@ static int winDelete( "ok" : "failed" )); return ( (rc == INVALID_FILE_ATTRIBUTES) - && (error == ERROR_FILE_NOT_FOUND)) ? SQLITE_OK : SQLITE_IOERR_DELETE; + && (error == ERROR_FILE_NOT_FOUND)) ? SQLITE_OK : + winLogError(SQLITE_IOERR_DELETE, "winDelete", zFilename); } /* @@ -33385,6 +33820,7 @@ static int winAccess( } }else{ if( GetLastError()!=ERROR_FILE_NOT_FOUND ){ + winLogError(SQLITE_IOERR_ACCESS, "winAccess", zFilename); free(zConverted); return SQLITE_IOERR_ACCESS; }else{ @@ -33449,6 +33885,13 @@ static int winFullPathname( void *zConverted; char *zOut; + /* If this path name begins with "/X:", where "X" is any alphabetic + ** character, discard the initial "/" from the pathname. + */ + if( zRelative[0]=='/' && sqlite3Isalpha(zRelative[1]) && zRelative[2]==':' ){ + zRelative++; + } + /* It's odd to simulate an io-error here, but really this is just ** using the io-error infrastructure to test that SQLite handles this ** function failing. This function could fail if, for example, the @@ -34489,6 +34932,13 @@ SQLITE_PRIVATE int sqlite3PcacheFetch( } if( pPg ){ int rc; +#ifdef SQLITE_LOG_CACHE_SPILL + sqlite3_log(SQLITE_FULL, + "spill page %d making room for %d - cache used: %d/%d", + pPg->pgno, pgno, + sqlite3GlobalConfig.pcache.xPagecount(pCache->pCache), + pCache->nMax); +#endif rc = pCache->xStress(pCache->pStress, pPg); if( rc!=SQLITE_OK && rc!=SQLITE_BUSY ){ return rc; @@ -35399,7 +35849,7 @@ static sqlite3_pcache *pcache1Create(int szPage, int bPurgeable){ pGroup = (PGroup*)&pCache[1]; pGroup->mxPinned = 10; }else{ - pGroup = &pcache1_g.grp; + pGroup = &pcache1.grp; } pCache->pGroup = pGroup; pCache->szPage = szPage; @@ -36260,6 +36710,7 @@ SQLITE_PRIVATE int sqlite3RowSetTest(RowSet *pRowSet, u8 iBatch, sqlite3_int64 i #ifdef SQLITE_OMIT_WAL # define sqlite3WalOpen(x,y,z) 0 +# define sqlite3WalLimit(x,y) # define sqlite3WalClose(w,x,y,z) 0 # define sqlite3WalBeginReadTransaction(y,z) 0 # define sqlite3WalEndReadTransaction(z) @@ -36285,9 +36736,12 @@ SQLITE_PRIVATE int sqlite3RowSetTest(RowSet *pRowSet, u8 iBatch, sqlite3_int64 i typedef struct Wal Wal; /* Open and close a connection to a write-ahead log. */ -SQLITE_PRIVATE int sqlite3WalOpen(sqlite3_vfs*, sqlite3_file*, const char *zName, int, Wal**); +SQLITE_PRIVATE int sqlite3WalOpen(sqlite3_vfs*, sqlite3_file*, const char *, int, i64, Wal**); SQLITE_PRIVATE int sqlite3WalClose(Wal *pWal, int sync_flags, int, u8 *); +/* Set the limiting size of a WAL file. */ +SQLITE_PRIVATE void sqlite3WalLimit(Wal*, i64); + /* Used by readers to open (lock) and close (unlock) a snapshot. A ** snapshot is like a read-transaction. It is the state of the database ** at an instant in time. sqlite3WalOpenSnapshot gets a read lock and @@ -40636,6 +41090,8 @@ SQLITE_PRIVATE int sqlite3PagerOpen( int noReadlock = (flags & PAGER_NO_READLOCK)!=0; /* True to omit read-lock */ int pcacheSize = sqlite3PcacheSize(); /* Bytes to allocate for PCache */ u32 szPageDflt = SQLITE_DEFAULT_PAGE_SIZE; /* Default page size */ + const char *zUri = 0; /* URI args to copy */ + int nUri = 0; /* Number of bytes of URI args at *zUri */ /* Figure out how much space is required for each journal file-handle ** (there are two of them, the main journal and the sub-journal). This @@ -40666,6 +41122,7 @@ SQLITE_PRIVATE int sqlite3PagerOpen( ** leave both nPathname and zPathname set to 0. */ if( zFilename && zFilename[0] ){ + const char *z; nPathname = pVfs->mxPathname+1; zPathname = sqlite3Malloc(nPathname*2); if( zPathname==0 ){ @@ -40674,6 +41131,12 @@ SQLITE_PRIVATE int sqlite3PagerOpen( zPathname[0] = 0; /* Make sure initialized even if FullPathname() fails */ rc = sqlite3OsFullPathname(pVfs, zFilename, nPathname, zPathname); nPathname = sqlite3Strlen30(zPathname); + z = zUri = &zFilename[sqlite3Strlen30(zFilename)+1]; + while( *z ){ + z += sqlite3Strlen30(z)+1; + z += sqlite3Strlen30(z)+1; + } + nUri = &z[1] - zUri; if( rc==SQLITE_OK && nPathname+8>pVfs->mxPathname ){ /* This branch is taken when the journal path required by ** the database being opened will be more than pVfs->mxPathname @@ -40706,7 +41169,7 @@ SQLITE_PRIVATE int sqlite3PagerOpen( ROUND8(pcacheSize) + /* PCache object */ ROUND8(pVfs->szOsFile) + /* The main db file */ journalFileSize * 2 + /* The two journal files */ - nPathname + 1 + /* zFilename */ + nPathname + 1 + nUri + /* zFilename */ nPathname + 8 + 1 /* zJournal */ #ifndef SQLITE_OMIT_WAL + nPathname + 4 + 1 /* zWal */ @@ -40728,14 +41191,17 @@ SQLITE_PRIVATE int sqlite3PagerOpen( /* Fill in the Pager.zFilename and Pager.zJournal buffers, if required. */ if( zPathname ){ assert( nPathname>0 ); - pPager->zJournal = (char*)(pPtr += nPathname + 1); + pPager->zJournal = (char*)(pPtr += nPathname + 1 + nUri); memcpy(pPager->zFilename, zPathname, nPathname); + memcpy(&pPager->zFilename[nPathname+1], zUri, nUri); memcpy(pPager->zJournal, zPathname, nPathname); memcpy(&pPager->zJournal[nPathname], "-journal", 8); + sqlite3FileSuffix3(pPager->zFilename, pPager->zJournal); #ifndef SQLITE_OMIT_WAL pPager->zWal = &pPager->zJournal[nPathname+8+1]; memcpy(pPager->zWal, zPathname, nPathname); memcpy(&pPager->zWal[nPathname], "-wal", 4); + sqlite3FileSuffix3(pPager->zFilename, pPager->zWal); #endif sqlite3_free(zPathname); } @@ -42080,8 +42546,8 @@ SQLITE_PRIVATE int sqlite3PagerCommitPhaseOne( pList = pPageOne; pList->pDirty = 0; } - assert( pList!=0 || rc!=SQLITE_OK ); - if( pList ){ + assert( rc==SQLITE_OK ); + if( ALWAYS(pList) ){ rc = pagerWalFrames(pPager, pList, pPager->dbSize, 1, (pPager->fullSync ? pPager->syncFlags : 0) ); @@ -42944,6 +43410,7 @@ SQLITE_PRIVATE int sqlite3PagerOkToChangeJournalMode(Pager *pPager){ SQLITE_PRIVATE i64 sqlite3PagerJournalSizeLimit(Pager *pPager, i64 iLimit){ if( iLimit>=-1 ){ pPager->journalSizeLimit = iLimit; + sqlite3WalLimit(pPager->pWal, iLimit); } return pPager->journalSizeLimit; } @@ -43035,7 +43502,8 @@ static int pagerOpenWal(Pager *pPager){ */ if( rc==SQLITE_OK ){ rc = sqlite3WalOpen(pPager->pVfs, - pPager->fd, pPager->zWal, pPager->exclusiveMode, &pPager->pWal + pPager->fd, pPager->zWal, pPager->exclusiveMode, + pPager->journalSizeLimit, &pPager->pWal ); } @@ -43567,6 +44035,7 @@ struct Wal { sqlite3_file *pDbFd; /* File handle for the database file */ sqlite3_file *pWalFd; /* File handle for WAL file */ u32 iCallback; /* Value to pass to log callback (or 0) */ + i64 mxWalSize; /* Truncate WAL to this size upon reset */ int nWiData; /* Size of array apWiData */ volatile u32 **apWiData; /* Pointer to wal-index content in memory */ u32 szPage; /* Database page size */ @@ -43574,7 +44043,7 @@ struct Wal { u8 exclusiveMode; /* Non-zero if connection is in exclusive mode */ u8 writeLock; /* True if in a write transaction */ u8 ckptLock; /* True if holding a checkpoint lock */ - u8 readOnly; /* True if the WAL file is open read-only */ + u8 readOnly; /* WAL_RDWR, WAL_RDONLY, or WAL_SHM_RDONLY */ WalIndexHdr hdr; /* Wal-index header for current transaction */ const char *zWalName; /* Name of WAL file */ u32 nCkpt; /* Checkpoint sequence counter in the wal-header */ @@ -43591,6 +44060,13 @@ struct Wal { #define WAL_HEAPMEMORY_MODE 2 /* +** Possible values for WAL.readOnly +*/ +#define WAL_RDWR 0 /* Normal read/write connection */ +#define WAL_RDONLY 1 /* The WAL file is readonly */ +#define WAL_SHM_RDONLY 2 /* The SHM file is readonly */ + +/* ** Each page of the wal-index mapping contains a hash-table made up of ** an array of HASHTABLE_NSLOT elements of the following type. */ @@ -43683,6 +44159,10 @@ static int walIndexPage(Wal *pWal, int iPage, volatile u32 **ppPage){ rc = sqlite3OsShmMap(pWal->pDbFd, iPage, WALINDEX_PGSZ, pWal->writeLock, (void volatile **)&pWal->apWiData[iPage] ); + if( rc==SQLITE_READONLY ){ + pWal->readOnly |= WAL_SHM_RDONLY; + rc = SQLITE_OK; + } } } @@ -44389,6 +44869,7 @@ SQLITE_PRIVATE int sqlite3WalOpen( sqlite3_file *pDbFd, /* The open database file */ const char *zWalName, /* Name of the WAL file */ int bNoShm, /* True to run in heap-memory mode */ + i64 mxWalSize, /* Truncate WAL to this size on reset */ Wal **ppWal /* OUT: Allocated Wal handle */ ){ int rc; /* Return Code */ @@ -44421,6 +44902,7 @@ SQLITE_PRIVATE int sqlite3WalOpen( pRet->pWalFd = (sqlite3_file *)&pRet[1]; pRet->pDbFd = pDbFd; pRet->readLock = -1; + pRet->mxWalSize = mxWalSize; pRet->zWalName = zWalName; pRet->exclusiveMode = (bNoShm ? WAL_HEAPMEMORY_MODE: WAL_NORMAL_MODE); @@ -44428,7 +44910,7 @@ SQLITE_PRIVATE int sqlite3WalOpen( flags = (SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|SQLITE_OPEN_WAL); rc = sqlite3OsOpen(pVfs, zWalName, pRet->pWalFd, flags, &flags); if( rc==SQLITE_OK && flags&SQLITE_OPEN_READONLY ){ - pRet->readOnly = 1; + pRet->readOnly = WAL_RDONLY; } if( rc!=SQLITE_OK ){ @@ -44443,6 +44925,13 @@ SQLITE_PRIVATE int sqlite3WalOpen( } /* +** Change the size to which the WAL file is trucated on each reset. +*/ +SQLITE_PRIVATE void sqlite3WalLimit(Wal *pWal, i64 iLimit){ + if( pWal ) pWal->mxWalSize = iLimit; +} + +/* ** Find the smallest page number out of all pages held in the WAL that ** has not been returned by any prior invocation of this method on the ** same WalIterator object. Write into *piFrame the frame index where @@ -45062,21 +45551,28 @@ static int walIndexReadHdr(Wal *pWal, int *pChanged){ ** with a writer. So get a WRITE lock and try again. */ assert( badHdr==0 || pWal->writeLock==0 ); - if( badHdr && SQLITE_OK==(rc = walLockExclusive(pWal, WAL_WRITE_LOCK, 1)) ){ - pWal->writeLock = 1; - if( SQLITE_OK==(rc = walIndexPage(pWal, 0, &page0)) ){ - badHdr = walIndexTryHdr(pWal, pChanged); - if( badHdr ){ - /* If the wal-index header is still malformed even while holding - ** a WRITE lock, it can only mean that the header is corrupted and - ** needs to be reconstructed. So run recovery to do exactly that. - */ - rc = walIndexRecover(pWal); - *pChanged = 1; + if( badHdr ){ + if( pWal->readOnly & WAL_SHM_RDONLY ){ + if( SQLITE_OK==(rc = walLockShared(pWal, WAL_WRITE_LOCK)) ){ + walUnlockShared(pWal, WAL_WRITE_LOCK); + rc = SQLITE_READONLY_RECOVERY; + } + }else if( SQLITE_OK==(rc = walLockExclusive(pWal, WAL_WRITE_LOCK, 1)) ){ + pWal->writeLock = 1; + if( SQLITE_OK==(rc = walIndexPage(pWal, 0, &page0)) ){ + badHdr = walIndexTryHdr(pWal, pChanged); + if( badHdr ){ + /* If the wal-index header is still malformed even while holding + ** a WRITE lock, it can only mean that the header is corrupted and + ** needs to be reconstructed. So run recovery to do exactly that. + */ + rc = walIndexRecover(pWal); + *pChanged = 1; + } } + pWal->writeLock = 0; + walUnlockExclusive(pWal, WAL_WRITE_LOCK, 1); } - pWal->writeLock = 0; - walUnlockExclusive(pWal, WAL_WRITE_LOCK, 1); } /* If the header is read successfully, check the version number to make @@ -45263,7 +45759,9 @@ static int walTryBeginRead(Wal *pWal, int *pChanged, int useWal, int cnt){ } /* There was once an "if" here. The extra "{" is to preserve indentation. */ { - if( mxReadMark < pWal->hdr.mxFrame || mxI==0 ){ + if( (pWal->readOnly & WAL_SHM_RDONLY)==0 + && (mxReadMark<pWal->hdr.mxFrame || mxI==0) + ){ for(i=1; i<WAL_NREADER; i++){ rc = walLockExclusive(pWal, WAL_READ_LOCK(i), 1); if( rc==SQLITE_OK ){ @@ -45277,8 +45775,8 @@ static int walTryBeginRead(Wal *pWal, int *pChanged, int useWal, int cnt){ } } if( mxI==0 ){ - assert( rc==SQLITE_BUSY ); - return WAL_RETRY; + assert( rc==SQLITE_BUSY || (pWal->readOnly & WAL_SHM_RDONLY)!=0 ); + return rc==SQLITE_BUSY ? WAL_RETRY : SQLITE_READONLY_CANTLOCK; } rc = walLockShared(pWal, WAL_READ_LOCK(mxI)); @@ -45677,6 +46175,24 @@ static int walRestartLog(Wal *pWal){ */ int i; /* Loop counter */ u32 *aSalt = pWal->hdr.aSalt; /* Big-endian salt values */ + + /* Limit the size of WAL file if the journal_size_limit PRAGMA is + ** set to a non-negative value. Log errors encountered + ** during the truncation attempt. */ + if( pWal->mxWalSize>=0 ){ + i64 sz; + int rx; + sqlite3BeginBenignMalloc(); + rx = sqlite3OsFileSize(pWal->pWalFd, &sz); + if( rx==SQLITE_OK && (sz > pWal->mxWalSize) ){ + rx = sqlite3OsTruncate(pWal->pWalFd, pWal->mxWalSize); + } + sqlite3EndBenignMalloc(); + if( rx ){ + sqlite3_log(rx, "cannot limit WAL size: %s", pWal->zWalName); + } + } + pWal->nCkpt++; pWal->hdr.mxFrame = 0; sqlite3Put4byte((u8*)&aSalt[0], 1 + sqlite3Get4byte((u8*)&aSalt[0])); @@ -45902,6 +46418,7 @@ SQLITE_PRIVATE int sqlite3WalCheckpoint( assert( pWal->ckptLock==0 ); assert( pWal->writeLock==0 ); + if( pWal->readOnly ) return SQLITE_READONLY; WALTRACE(("WAL%p: checkpoint begins\n", pWal)); rc = walLockExclusive(pWal, WAL_CKPT_LOCK, 1); if( rc ){ @@ -47782,6 +48299,7 @@ static void ptrmapPut(BtShared *pBt, Pgno key, u8 eType, Pgno parent, int *pRC){ *pRC = SQLITE_CORRUPT_BKPT; goto ptrmap_exit; } + assert( offset <= (int)pBt->usableSize-5 ); pPtrmap = (u8 *)sqlite3PagerGetData(pDbPage); if( eType!=pPtrmap[offset] || get4byte(&pPtrmap[offset+1])!=parent ){ @@ -47821,6 +48339,11 @@ static int ptrmapGet(BtShared *pBt, Pgno key, u8 *pEType, Pgno *pPgno){ pPtrmap = (u8 *)sqlite3PagerGetData(pDbPage); offset = PTRMAP_PTROFFSET(iPtrmap, key); + if( offset<0 ){ + sqlite3PagerUnref(pDbPage); + return SQLITE_CORRUPT_BKPT; + } + assert( offset <= (int)pBt->usableSize-5 ); assert( pEType!=0 ); *pEType = pPtrmap[offset]; if( pPgno ) *pPgno = get4byte(&pPtrmap[offset+1]); @@ -47845,6 +48368,8 @@ static int ptrmapGet(BtShared *pBt, Pgno key, u8 *pEType, Pgno *pPgno){ */ #define findCell(P,I) \ ((P)->aData + ((P)->maskPage & get2byte(&(P)->aData[(P)->cellOffset+2*(I)]))) +#define findCellv2(D,M,O,I) (D+(M&get2byte(D+(O+2*(I))))) + /* ** This a more complex version of findCell() that works for @@ -48682,13 +49207,13 @@ static int btreeInvokeBusyHandler(void *pArg){ ** to problems with locking. */ SQLITE_PRIVATE int sqlite3BtreeOpen( + sqlite3_vfs *pVfs, /* VFS to use for this b-tree */ const char *zFilename, /* Name of the file containing the BTree database */ sqlite3 *db, /* Associated database handle */ Btree **ppBtree, /* Pointer to new Btree object written here */ int flags, /* Options */ int vfsFlags /* Flags passed through to sqlite3_vfs.xOpen() */ ){ - sqlite3_vfs *pVfs; /* The VFS to use for this btree */ BtShared *pBt = 0; /* Shared part of btree structure */ Btree *p; /* Handle to return */ sqlite3_mutex *mutexOpen = 0; /* Prevents a race condition. Ticket #3537 */ @@ -48710,6 +49235,7 @@ SQLITE_PRIVATE int sqlite3BtreeOpen( #endif assert( db!=0 ); + assert( pVfs!=0 ); assert( sqlite3_mutex_held(db->mutex) ); assert( (flags&0xff)==flags ); /* flags fit in 8 bits */ @@ -48728,7 +49254,6 @@ SQLITE_PRIVATE int sqlite3BtreeOpen( if( (vfsFlags & SQLITE_OPEN_MAIN_DB)!=0 && (isMemdb || isTempDb) ){ vfsFlags = (vfsFlags & ~SQLITE_OPEN_MAIN_DB) | SQLITE_OPEN_TEMP_DB; } - pVfs = db->pVfs; p = sqlite3MallocZero(sizeof(Btree)); if( !p ){ return SQLITE_NOMEM; @@ -51439,7 +51964,7 @@ SQLITE_PRIVATE int sqlite3BtreeMovetoUnpacked( } assert( pCur->apPage[0]->intKey || pIdxKey ); for(;;){ - int lwr, upr; + int lwr, upr, idx; Pgno chldPg; MemPage *pPage = pCur->apPage[pCur->iPage]; int c; @@ -51455,14 +51980,14 @@ SQLITE_PRIVATE int sqlite3BtreeMovetoUnpacked( lwr = 0; upr = pPage->nCell-1; if( biasRight ){ - pCur->aiIdx[pCur->iPage] = (u16)upr; + pCur->aiIdx[pCur->iPage] = (u16)(idx = upr); }else{ - pCur->aiIdx[pCur->iPage] = (u16)((upr+lwr)/2); + pCur->aiIdx[pCur->iPage] = (u16)(idx = (upr+lwr)/2); } for(;;){ - int idx = pCur->aiIdx[pCur->iPage]; /* Index of current cell in pPage */ u8 *pCell; /* Pointer to current cell in pPage */ + assert( idx==pCur->aiIdx[pCur->iPage] ); pCur->info.nSize = 0; pCell = findCell(pPage, idx) + pPage->childPtrSize; if( pPage->intKey ){ @@ -51545,7 +52070,7 @@ SQLITE_PRIVATE int sqlite3BtreeMovetoUnpacked( if( lwr>upr ){ break; } - pCur->aiIdx[pCur->iPage] = (u16)((lwr+upr)/2); + pCur->aiIdx[pCur->iPage] = (u16)(idx = (lwr+upr)/2); } assert( lwr==upr+1 ); assert( pPage->isInit ); @@ -52378,10 +52903,10 @@ static int fillInCell( ** "sz" must be the number of bytes in the cell. */ static void dropCell(MemPage *pPage, int idx, int sz, int *pRC){ - int i; /* Loop counter */ u32 pc; /* Offset to cell content of cell being deleted */ u8 *data; /* pPage->aData */ u8 *ptr; /* Used to move bytes around within data[] */ + u8 *endPtr; /* End of loop */ int rc; /* The return code */ int hdr; /* Beginning of the header. 0 most pages. 100 page 1 */ @@ -52406,9 +52931,11 @@ static void dropCell(MemPage *pPage, int idx, int sz, int *pRC){ *pRC = rc; return; } - for(i=idx+1; i<pPage->nCell; i++, ptr+=2){ - ptr[0] = ptr[2]; - ptr[1] = ptr[3]; + endPtr = &data[pPage->cellOffset + 2*pPage->nCell - 2]; + assert( (SQLITE_PTR_TO_INT(ptr)&1)==0 ); /* ptr is always 2-byte aligned */ + while( ptr<endPtr ){ + *(u16*)ptr = *(u16*)&ptr[2]; + ptr += 2; } pPage->nCell--; put2byte(&data[hdr+3], pPage->nCell); @@ -52448,6 +52975,7 @@ static void insertCell( int cellOffset; /* Address of first cell pointer in data[] */ u8 *data; /* The content of the whole page */ u8 *ptr; /* Used for moving information around in data[] */ + u8 *endPtr; /* End of the loop */ int nSkip = (iChild ? 4 : 0); @@ -52498,9 +53026,12 @@ static void insertCell( if( iChild ){ put4byte(&data[idx], iChild); } - for(j=end, ptr=&data[j]; j>ins; j-=2, ptr-=2){ - ptr[0] = ptr[-2]; - ptr[1] = ptr[-1]; + ptr = &data[end]; + endPtr = &data[ins]; + assert( (SQLITE_PTR_TO_INT(ptr)&1)==0 ); /* ptr is always 2-byte aligned */ + while( ptr>endPtr ){ + *(u16*)ptr = *(u16*)&ptr[-2]; + ptr -= 2; } put2byte(&data[ins], idx); put2byte(&data[pPage->hdrOffset+3], pPage->nCell); @@ -52545,10 +53076,11 @@ static void assemblePage( pCellptr = &data[pPage->cellOffset + nCell*2]; cellbody = nUsable; for(i=nCell-1; i>=0; i--){ + u16 sz = aSize[i]; pCellptr -= 2; - cellbody -= aSize[i]; + cellbody -= sz; put2byte(pCellptr, cellbody); - memcpy(&data[cellbody], apCell[i], aSize[i]); + memcpy(&data[cellbody], apCell[i], sz); } put2byte(&data[hdr+3], nCell); put2byte(&data[hdr+5], cellbody); @@ -53002,12 +53534,24 @@ static int balance_nonroot( memcpy(pOld->aData, apOld[i]->aData, pBt->pageSize); limit = pOld->nCell+pOld->nOverflow; - for(j=0; j<limit; j++){ - assert( nCell<nMaxCells ); - apCell[nCell] = findOverflowCell(pOld, j); - szCell[nCell] = cellSizePtr(pOld, apCell[nCell]); - nCell++; - } + if( pOld->nOverflow>0 ){ + for(j=0; j<limit; j++){ + assert( nCell<nMaxCells ); + apCell[nCell] = findOverflowCell(pOld, j); + szCell[nCell] = cellSizePtr(pOld, apCell[nCell]); + nCell++; + } + }else{ + u8 *aData = pOld->aData; + u16 maskPage = pOld->maskPage; + u16 cellOffset = pOld->cellOffset; + for(j=0; j<limit; j++){ + assert( nCell<nMaxCells ); + apCell[nCell] = findCellv2(aData, maskPage, cellOffset, j); + szCell[nCell] = cellSizePtr(pOld, apCell[nCell]); + nCell++; + } + } if( i<nOld-1 && !leafData){ u16 sz = (u16)szNew[i]; u8 *pTemp; @@ -57156,13 +57700,6 @@ SQLITE_PRIVATE int sqlite3VdbeAddOp3(Vdbe *p, int op, int p1, int p2, int p3){ pOp->p3 = p3; pOp->p4.p = 0; pOp->p4type = P4_NOTUSED; - p->expired = 0; - if( op==OP_ParseSchema ){ - /* Any program that uses the OP_ParseSchema opcode needs to lock - ** all btrees. */ - int j; - for(j=0; j<p->db->nDb; j++) sqlite3VdbeUsesBtree(p, j); - } #ifdef SQLITE_DEBUG pOp->zComment = 0; if( sqlite3VdbeAddopTrace ) sqlite3VdbePrintOp(0, i, &p->aOp[i]); @@ -57202,6 +57739,20 @@ SQLITE_PRIVATE int sqlite3VdbeAddOp4( } /* +** Add an OP_ParseSchema opcode. This routine is broken out from +** sqlite3VdbeAddOp4() since it needs to also local all btrees. +** +** The zWhere string must have been obtained from sqlite3_malloc(). +** This routine will take ownership of the allocated memory. +*/ +SQLITE_PRIVATE void sqlite3VdbeAddParseSchemaOp(Vdbe *p, int iDb, char *zWhere){ + int j; + int addr = sqlite3VdbeAddOp3(p, OP_ParseSchema, iDb, 0, 0); + sqlite3VdbeChangeP4(p, addr, zWhere, P4_DYNAMIC); + for(j=0; j<p->db->nDb; j++) sqlite3VdbeUsesBtree(p, j); +} + +/* ** Add an opcode that includes the p4 value as an integer. */ SQLITE_PRIVATE int sqlite3VdbeAddOp4Int( @@ -58391,44 +58942,88 @@ static void *allocSpace( } /* -** Prepare a virtual machine for execution. This involves things such +** Rewind the VDBE back to the beginning in preparation for +** running it. +*/ +SQLITE_PRIVATE void sqlite3VdbeRewind(Vdbe *p){ +#if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE) + int i; +#endif + assert( p!=0 ); + assert( p->magic==VDBE_MAGIC_INIT ); + + /* There should be at least one opcode. + */ + assert( p->nOp>0 ); + + /* Set the magic to VDBE_MAGIC_RUN sooner rather than later. */ + p->magic = VDBE_MAGIC_RUN; + +#ifdef SQLITE_DEBUG + for(i=1; i<p->nMem; i++){ + assert( p->aMem[i].db==p->db ); + } +#endif + p->pc = -1; + p->rc = SQLITE_OK; + p->errorAction = OE_Abort; + p->magic = VDBE_MAGIC_RUN; + p->nChange = 0; + p->cacheCtr = 1; + p->minWriteFileFormat = 255; + p->iStatement = 0; + p->nFkConstraint = 0; +#ifdef VDBE_PROFILE + for(i=0; i<p->nOp; i++){ + p->aOp[i].cnt = 0; + p->aOp[i].cycles = 0; + } +#endif +} + +/* +** Prepare a virtual machine for execution for the first time after +** creating the virtual machine. This involves things such ** as allocating stack space and initializing the program counter. ** After the VDBE has be prepped, it can be executed by one or more ** calls to sqlite3VdbeExec(). ** -** This is the only way to move a VDBE from VDBE_MAGIC_INIT to -** VDBE_MAGIC_RUN. +** This function may be called exact once on a each virtual machine. +** After this routine is called the VM has been "packaged" and is ready +** to run. After this routine is called, futher calls to +** sqlite3VdbeAddOp() functions are prohibited. This routine disconnects +** the Vdbe from the Parse object that helped generate it so that the +** the Vdbe becomes an independent entity and the Parse object can be +** destroyed. ** -** This function may be called more than once on a single virtual machine. -** The first call is made while compiling the SQL statement. Subsequent -** calls are made as part of the process of resetting a statement to be -** re-executed (from a call to sqlite3_reset()). The nVar, nMem, nCursor -** and isExplain parameters are only passed correct values the first time -** the function is called. On subsequent calls, from sqlite3_reset(), nVar -** is passed -1 and nMem, nCursor and isExplain are all passed zero. +** Use the sqlite3VdbeRewind() procedure to restore a virtual machine back +** to its initial state after it has been run. */ SQLITE_PRIVATE void sqlite3VdbeMakeReady( Vdbe *p, /* The VDBE */ - int nVar, /* Number of '?' see in the SQL statement */ - int nMem, /* Number of memory cells to allocate */ - int nCursor, /* Number of cursors to allocate */ - int nArg, /* Maximum number of args in SubPrograms */ - int isExplain, /* True if the EXPLAIN keywords is present */ - int usesStmtJournal /* True to set Vdbe.usesStmtJournal */ + Parse *pParse /* Parsing context */ ){ - int n; - sqlite3 *db = p->db; + sqlite3 *db; /* The database connection */ + int nVar; /* Number of parameters */ + int nMem; /* Number of VM memory registers */ + int nCursor; /* Number of cursors required */ + int nArg; /* Number of arguments in subprograms */ + int n; /* Loop counter */ + u8 *zCsr; /* Memory available for allocation */ + u8 *zEnd; /* First byte past allocated memory */ + int nByte; /* How much extra memory is needed */ assert( p!=0 ); - assert( p->magic==VDBE_MAGIC_INIT ); - - /* There should be at least one opcode. - */ assert( p->nOp>0 ); - - /* Set the magic to VDBE_MAGIC_RUN sooner rather than later. */ - p->magic = VDBE_MAGIC_RUN; - + assert( pParse!=0 ); + assert( p->magic==VDBE_MAGIC_INIT ); + db = p->db; + assert( db->mallocFailed==0 ); + nVar = pParse->nVar; + nMem = pParse->nMem; + nCursor = pParse->nTab; + nArg = pParse->nMaxArg; + /* For each cursor required, also allocate a memory cell. Memory ** cells (nMem+1-nCursor)..nMem, inclusive, will never be used by ** the vdbe program. Instead they are used to allocate space for @@ -58441,91 +59036,69 @@ SQLITE_PRIVATE void sqlite3VdbeMakeReady( nMem += nCursor; /* Allocate space for memory registers, SQL variables, VDBE cursors and - ** an array to marshal SQL function arguments in. This is only done the - ** first time this function is called for a given VDBE, not when it is - ** being called from sqlite3_reset() to reset the virtual machine. - */ - if( nVar>=0 && ALWAYS(db->mallocFailed==0) ){ - u8 *zCsr = (u8 *)&p->aOp[p->nOp]; /* Memory avaliable for alloation */ - u8 *zEnd = (u8 *)&p->aOp[p->nOpAlloc]; /* First byte past available mem */ - int nByte; /* How much extra memory needed */ - - resolveP2Values(p, &nArg); - p->usesStmtJournal = (u8)usesStmtJournal; - if( isExplain && nMem<10 ){ - nMem = 10; - } - memset(zCsr, 0, zEnd-zCsr); - zCsr += (zCsr - (u8*)0)&7; - assert( EIGHT_BYTE_ALIGNMENT(zCsr) ); - - /* Memory for registers, parameters, cursor, etc, is allocated in two - ** passes. On the first pass, we try to reuse unused space at the - ** end of the opcode array. If we are unable to satisfy all memory - ** requirements by reusing the opcode array tail, then the second - ** pass will fill in the rest using a fresh allocation. - ** - ** This two-pass approach that reuses as much memory as possible from - ** the leftover space at the end of the opcode array can significantly - ** reduce the amount of memory held by a prepared statement. - */ - do { - nByte = 0; - p->aMem = allocSpace(p->aMem, nMem*sizeof(Mem), &zCsr, zEnd, &nByte); - p->aVar = allocSpace(p->aVar, nVar*sizeof(Mem), &zCsr, zEnd, &nByte); - p->apArg = allocSpace(p->apArg, nArg*sizeof(Mem*), &zCsr, zEnd, &nByte); - p->azVar = allocSpace(p->azVar, nVar*sizeof(char*), &zCsr, zEnd, &nByte); - p->apCsr = allocSpace(p->apCsr, nCursor*sizeof(VdbeCursor*), - &zCsr, zEnd, &nByte); - if( nByte ){ - p->pFree = sqlite3DbMallocZero(db, nByte); - } - zCsr = p->pFree; - zEnd = &zCsr[nByte]; - }while( nByte && !db->mallocFailed ); + ** an array to marshal SQL function arguments in. + */ + zCsr = (u8*)&p->aOp[p->nOp]; /* Memory avaliable for allocation */ + zEnd = (u8*)&p->aOp[p->nOpAlloc]; /* First byte past end of zCsr[] */ - p->nCursor = (u16)nCursor; - if( p->aVar ){ - p->nVar = (ynVar)nVar; - for(n=0; n<nVar; n++){ - p->aVar[n].flags = MEM_Null; - p->aVar[n].db = db; - } + resolveP2Values(p, &nArg); + p->usesStmtJournal = (u8)(pParse->isMultiWrite && pParse->mayAbort); + if( pParse->explain && nMem<10 ){ + nMem = 10; + } + memset(zCsr, 0, zEnd-zCsr); + zCsr += (zCsr - (u8*)0)&7; + assert( EIGHT_BYTE_ALIGNMENT(zCsr) ); + p->expired = 0; + + /* Memory for registers, parameters, cursor, etc, is allocated in two + ** passes. On the first pass, we try to reuse unused space at the + ** end of the opcode array. If we are unable to satisfy all memory + ** requirements by reusing the opcode array tail, then the second + ** pass will fill in the rest using a fresh allocation. + ** + ** This two-pass approach that reuses as much memory as possible from + ** the leftover space at the end of the opcode array can significantly + ** reduce the amount of memory held by a prepared statement. + */ + do { + nByte = 0; + p->aMem = allocSpace(p->aMem, nMem*sizeof(Mem), &zCsr, zEnd, &nByte); + p->aVar = allocSpace(p->aVar, nVar*sizeof(Mem), &zCsr, zEnd, &nByte); + p->apArg = allocSpace(p->apArg, nArg*sizeof(Mem*), &zCsr, zEnd, &nByte); + p->azVar = allocSpace(p->azVar, nVar*sizeof(char*), &zCsr, zEnd, &nByte); + p->apCsr = allocSpace(p->apCsr, nCursor*sizeof(VdbeCursor*), + &zCsr, zEnd, &nByte); + if( nByte ){ + p->pFree = sqlite3DbMallocZero(db, nByte); } - if( p->aMem ){ - p->aMem--; /* aMem[] goes from 1..nMem */ - p->nMem = nMem; /* not from 0..nMem-1 */ - for(n=1; n<=nMem; n++){ - p->aMem[n].flags = MEM_Null; - p->aMem[n].db = db; - } + zCsr = p->pFree; + zEnd = &zCsr[nByte]; + }while( nByte && !db->mallocFailed ); + + p->nCursor = (u16)nCursor; + if( p->aVar ){ + p->nVar = (ynVar)nVar; + for(n=0; n<nVar; n++){ + p->aVar[n].flags = MEM_Null; + p->aVar[n].db = db; } } -#ifdef SQLITE_DEBUG - for(n=1; n<p->nMem; n++){ - assert( p->aMem[n].db==db ); + if( p->azVar ){ + p->nzVar = pParse->nzVar; + memcpy(p->azVar, pParse->azVar, p->nzVar*sizeof(p->azVar[0])); + memset(pParse->azVar, 0, pParse->nzVar*sizeof(pParse->azVar[0])); } -#endif - - p->pc = -1; - p->rc = SQLITE_OK; - p->errorAction = OE_Abort; - p->explain |= isExplain; - p->magic = VDBE_MAGIC_RUN; - p->nChange = 0; - p->cacheCtr = 1; - p->minWriteFileFormat = 255; - p->iStatement = 0; - p->nFkConstraint = 0; -#ifdef VDBE_PROFILE - { - int i; - for(i=0; i<p->nOp; i++){ - p->aOp[i].cnt = 0; - p->aOp[i].cycles = 0; + if( p->aMem ){ + p->aMem--; /* aMem[] goes from 1..nMem */ + p->nMem = nMem; /* not from 0..nMem-1 */ + for(n=1; n<=nMem; n++){ + p->aMem[n].flags = MEM_Null; + p->aMem[n].db = db; } } -#endif + p->explain = pParse->explain; + sqlite3VdbeRewind(p); } /* @@ -58799,6 +59372,7 @@ static int vdbeCommit(sqlite3 *db, Vdbe *p){ if( !zMaster ){ return SQLITE_NOMEM; } + sqlite3FileSuffix3(zMainFile, zMaster); rc = sqlite3OsAccess(pVfs, zMaster, SQLITE_ACCESS_EXISTS, &res); }while( rc==SQLITE_OK && res ); if( rc==SQLITE_OK ){ @@ -59013,6 +59587,15 @@ SQLITE_PRIVATE int sqlite3VdbeCloseStatement(Vdbe *p, int eOp){ db->nStatement--; p->iStatement = 0; + if( rc==SQLITE_OK ){ + if( eOp==SAVEPOINT_ROLLBACK ){ + rc = sqlite3VtabSavepoint(db, SAVEPOINT_ROLLBACK, iSavepoint); + } + if( rc==SQLITE_OK ){ + rc = sqlite3VtabSavepoint(db, SAVEPOINT_RELEASE, iSavepoint); + } + } + /* If the statement transaction is being rolled back, also restore the ** database handles deferred constraint counter to the value it had when ** the statement transaction was opened. */ @@ -59192,17 +59775,11 @@ SQLITE_PRIVATE int sqlite3VdbeHalt(Vdbe *p){ ** do so. If this operation returns an error, and the current statement ** error code is SQLITE_OK or SQLITE_CONSTRAINT, then promote the ** current statement error code. - ** - ** Note that sqlite3VdbeCloseStatement() can only fail if eStatementOp - ** is SAVEPOINT_ROLLBACK. But if p->rc==SQLITE_OK then eStatementOp - ** must be SAVEPOINT_RELEASE. Hence the NEVER(p->rc==SQLITE_OK) in - ** the following code. */ if( eStatementOp ){ rc = sqlite3VdbeCloseStatement(p, eStatementOp); if( rc ){ - assert( eStatementOp==SAVEPOINT_ROLLBACK ); - if( NEVER(p->rc==SQLITE_OK) || p->rc==SQLITE_CONSTRAINT ){ + if( p->rc==SQLITE_OK || p->rc==SQLITE_CONSTRAINT ){ p->rc = rc; sqlite3DbFree(db, p->zErrMsg); p->zErrMsg = 0; @@ -59395,6 +59972,7 @@ SQLITE_PRIVATE void sqlite3VdbeDeleteAuxData(VdbeFunc *pVdbeFunc, int mask){ */ SQLITE_PRIVATE void sqlite3VdbeDeleteObject(sqlite3 *db, Vdbe *p){ SubProgram *pSub, *pNext; + int i; assert( p->db==0 || p->db==db ); releaseMemArray(p->aVar, p->nVar); releaseMemArray(p->aColName, p->nResColumn*COLNAME_N); @@ -59403,6 +59981,7 @@ SQLITE_PRIVATE void sqlite3VdbeDeleteObject(sqlite3 *db, Vdbe *p){ vdbeFreeOpArray(db, pSub->aOp, pSub->nOp); sqlite3DbFree(db, pSub); } + for(i=p->nzVar-1; i>=0; i--) sqlite3DbFree(db, p->azVar[i]); vdbeFreeOpArray(db, p->aOp, p->nOp); sqlite3DbFree(db, p->aLabel); sqlite3DbFree(db, p->aColName); @@ -59848,7 +60427,7 @@ SQLITE_PRIVATE UnpackedRecord *sqlite3VdbeRecordUnpack( idx += getVarint32(&aKey[idx], serial_type); pMem->enc = pKeyInfo->enc; pMem->db = pKeyInfo->db; - pMem->flags = 0; + /* pMem->flags = 0; // sqlite3VdbeSerialGet() will set this for us */ pMem->zMalloc = 0; d += sqlite3VdbeSerialGet(&aKey[d], serial_type, pMem); pMem++; @@ -59863,6 +60442,7 @@ SQLITE_PRIVATE UnpackedRecord *sqlite3VdbeRecordUnpack( ** This routine destroys a UnpackedRecord object. */ SQLITE_PRIVATE void sqlite3VdbeDeleteUnpackedRecord(UnpackedRecord *p){ +#ifdef SQLITE_DEBUG int i; Mem *pMem; @@ -59876,6 +60456,7 @@ SQLITE_PRIVATE void sqlite3VdbeDeleteUnpackedRecord(UnpackedRecord *p){ */ if( NEVER(pMem->zMalloc) ) sqlite3VdbeMemRelease(pMem); } +#endif if( p->flags & UNPACKED_NEED_FREE ){ sqlite3DbFree(p->pKeyInfo->db, p); } @@ -59929,7 +60510,7 @@ SQLITE_PRIVATE int sqlite3VdbeRecordCompare( /* Compilers may complain that mem1.u.i is potentially uninitialized. ** We could initialize it, as shown here, to silence those complaints. - ** But in fact, mem1.u.i will never actually be used initialized, and doing + ** But in fact, mem1.u.i will never actually be used uninitialized, and doing ** the unnecessary initialization has a measurable negative performance ** impact, since this routine is a very high runner. And so, we choose ** to ignore the compiler warnings and leave this variable uninitialized. @@ -60311,7 +60892,7 @@ SQLITE_API int sqlite3_reset(sqlite3_stmt *pStmt){ Vdbe *v = (Vdbe*)pStmt; sqlite3_mutex_enter(v->db->mutex); rc = sqlite3VdbeReset(v); - sqlite3VdbeMakeReady(v, -1, 0, 0, 0, 0, 0); + sqlite3VdbeRewind(v); assert( (rc & (v->db->errMask))==rc ); rc = sqlite3ApiExit(v->db, rc); sqlite3_mutex_leave(v->db->mutex); @@ -60669,6 +61250,14 @@ end_of_step: } /* +** The maximum number of times that a statement will try to reparse +** itself before giving up and returning SQLITE_SCHEMA. +*/ +#ifndef SQLITE_MAX_SCHEMA_RETRY +# define SQLITE_MAX_SCHEMA_RETRY 5 +#endif + +/* ** This is the top-level implementation of sqlite3_step(). Call ** sqlite3Step() to do most of the work. If a schema error occurs, ** call sqlite3Reprepare() and try again. @@ -60686,7 +61275,7 @@ SQLITE_API int sqlite3_step(sqlite3_stmt *pStmt){ db = v->db; sqlite3_mutex_enter(db->mutex); while( (rc = sqlite3Step(v))==SQLITE_SCHEMA - && cnt++ < 5 + && cnt++ < SQLITE_MAX_SCHEMA_RETRY && (rc2 = rc = sqlite3Reprepare(v))==SQLITE_OK ){ sqlite3_reset(pStmt); v->expired = 0; @@ -61377,32 +61966,6 @@ SQLITE_API int sqlite3_bind_parameter_count(sqlite3_stmt *pStmt){ } /* -** Create a mapping from variable numbers to variable names -** in the Vdbe.azVar[] array, if such a mapping does not already -** exist. -*/ -static void createVarMap(Vdbe *p){ - if( !p->okVar ){ - int j; - Op *pOp; - sqlite3_mutex_enter(p->db->mutex); - /* The race condition here is harmless. If two threads call this - ** routine on the same Vdbe at the same time, they both might end - ** up initializing the Vdbe.azVar[] array. That is a little extra - ** work but it results in the same answer. - */ - for(j=0, pOp=p->aOp; j<p->nOp; j++, pOp++){ - if( pOp->opcode==OP_Variable ){ - assert( pOp->p1>0 && pOp->p1<=p->nVar ); - p->azVar[pOp->p1-1] = pOp->p4.z; - } - } - p->okVar = 1; - sqlite3_mutex_leave(p->db->mutex); - } -} - -/* ** Return the name of a wildcard parameter. Return NULL if the index ** is out of range or if the wildcard is unnamed. ** @@ -61410,10 +61973,9 @@ static void createVarMap(Vdbe *p){ */ SQLITE_API const char *sqlite3_bind_parameter_name(sqlite3_stmt *pStmt, int i){ Vdbe *p = (Vdbe*)pStmt; - if( p==0 || i<1 || i>p->nVar ){ + if( p==0 || i<1 || i>p->nzVar ){ return 0; } - createVarMap(p); return p->azVar[i-1]; } @@ -61427,9 +61989,8 @@ SQLITE_PRIVATE int sqlite3VdbeParameterIndex(Vdbe *p, const char *zName, int nNa if( p==0 ){ return 0; } - createVarMap(p); if( zName ){ - for(i=0; i<p->nVar; i++){ + for(i=0; i<p->nzVar; i++){ const char *z = p->azVar[i]; if( z && memcmp(z,zName,nName)==0 && z[nName]==0 ){ return i+1; @@ -62344,6 +62905,7 @@ SQLITE_PRIVATE int sqlite3VdbeExec( Mem *pOut = 0; /* Output operand */ int iCompare = 0; /* Result of last OP_Compare operation */ int *aPermute = 0; /* Permutation of columns for OP_Compare */ + i64 lastRowid = db->lastRowid; /* Saved value of the last insert ROWID */ #ifdef VDBE_PROFILE u64 start; /* CPU clock count at start of opcode */ int origPc; /* Program counter at start of opcode */ @@ -62752,6 +63314,7 @@ SQLITE_PRIVATE int sqlite3VdbeExec( } cm; struct OP_Trace_stack_vars { char *zTrace; + char *z; } cn; } u; /* End automatically generated code @@ -62985,7 +63548,7 @@ case OP_Yield: { /* in1 */ /* Opcode: HaltIfNull P1 P2 P3 P4 * ** -** Check the value in register P3. If is is NULL then Halt using +** Check the value in register P3. If it is NULL then Halt using ** parameter P1, P2, and P4 as if this were a Halt instruction. If the ** value in register P3 is not NULL, then this routine is a no-op. */ @@ -63022,6 +63585,7 @@ case OP_Halt: { p->nFrame--; sqlite3VdbeSetChanges(db, p->nChange); pc = sqlite3VdbeFrameRestore(pFrame); + lastRowid = db->lastRowid; if( pOp->p2==OE_Ignore ){ /* Instruction pc is the OP_Program that invoked the sub-program ** currently being halted. If the p2 instruction of this OP_Halt @@ -63177,6 +63741,7 @@ case OP_Variable: { /* out2-prerelease */ #endif /* local variables moved into u.ab */ assert( pOp->p1>0 && pOp->p1<=p->nVar ); + assert( pOp->p4.z==0 || pOp->p4.z==p->azVar[pOp->p1-1] ); u.ab.pVar = &p->aVar[pOp->p1 - 1]; if( sqlite3VdbeMemTooBig(u.ab.pVar) ){ goto too_big; @@ -63594,16 +64159,9 @@ case OP_Function: { assert( pOp[-1].opcode==OP_CollSeq ); u.ag.ctx.pColl = pOp[-1].p4.pColl; } + db->lastRowid = lastRowid; (*u.ag.ctx.pFunc->xFunc)(&u.ag.ctx, u.ag.n, u.ag.apVal); /* IMP: R-24505-23230 */ - if( db->mallocFailed ){ - /* Even though a malloc() has failed, the implementation of the - ** user function may have called an sqlite3_result_XXX() function - ** to return a value. The following call releases any resources - ** associated with such a value. - */ - sqlite3VdbeMemRelease(&u.ag.ctx.s); - goto no_mem; - } + lastRowid = db->lastRowid; /* If any auxiliary data functions have been called by this user function, ** immediately call the destructor for any non-static values. @@ -63614,6 +64172,16 @@ case OP_Function: { pOp->p4type = P4_VDBEFUNC; } + if( db->mallocFailed ){ + /* Even though a malloc() has failed, the implementation of the + ** user function may have called an sqlite3_result_XXX() function + ** to return a value. The following call releases any resources + ** associated with such a value. + */ + sqlite3VdbeMemRelease(&u.ag.ctx.s); + goto no_mem; + } + /* If the function returned an error, throw an exception */ if( u.ag.ctx.isError ){ sqlite3SetString(&p->zErrMsg, db, "%s", sqlite3_value_text(&u.ag.ctx.s)); @@ -63917,7 +64485,7 @@ case OP_ToReal: { /* same as TK_TO_REAL, in1 */ ** If SQLITE_NULLEQ is set in P5 then the result of comparison is always either ** true or false and is never NULL. If both operands are NULL then the result ** of comparison is false. If either operand is NULL then the result is true. -** If neither operand is NULL the the result is the same as it would be if +** If neither operand is NULL the result is the same as it would be if ** the SQLITE_NULLEQ flag were omitted from P5. */ /* Opcode: Eq P1 P2 P3 P4 P5 @@ -63929,7 +64497,7 @@ case OP_ToReal: { /* same as TK_TO_REAL, in1 */ ** If SQLITE_NULLEQ is set in P5 then the result of comparison is always either ** true or false and is never NULL. If both operands are NULL then the result ** of comparison is true. If either operand is NULL then the result is false. -** If neither operand is NULL the the result is the same as it would be if +** If neither operand is NULL the result is the same as it would be if ** the SQLITE_NULLEQ flag were omitted from P5. */ /* Opcode: Le P1 P2 P3 P4 P5 @@ -63967,7 +64535,7 @@ case OP_Ge: { /* same as TK_GE, jump, in1, in3 */ pIn3 = &aMem[pOp->p3]; u.ai.flags1 = pIn1->flags; u.ai.flags3 = pIn3->flags; - if( (pIn1->flags | pIn3->flags)&MEM_Null ){ + if( (u.ai.flags1 | u.ai.flags3)&MEM_Null ){ /* One or both operands are NULL */ if( pOp->p5 & SQLITE_NULLEQ ){ /* If SQLITE_NULLEQ is set (which will only happen if the operator is @@ -63975,7 +64543,7 @@ case OP_Ge: { /* same as TK_GE, jump, in1, in3 */ ** or not both operands are null. */ assert( pOp->opcode==OP_Eq || pOp->opcode==OP_Ne ); - u.ai.res = (pIn1->flags & pIn3->flags & MEM_Null)==0; + u.ai.res = (u.ai.flags1 & u.ai.flags3 & MEM_Null)==0; }else{ /* SQLITE_NULLEQ is clear and at least one operand is NULL, ** then the result is always NULL. @@ -64214,13 +64782,13 @@ case OP_BitNot: { /* same as TK_BITNOT, in1, out2 */ /* Opcode: If P1 P2 P3 * * ** -** Jump to P2 if the value in register P1 is true. The value is +** Jump to P2 if the value in register P1 is true. The value ** is considered true if it is numeric and non-zero. If the value ** in P1 is NULL then take the jump if P3 is true. */ /* Opcode: IfNot P1 P2 P3 * * ** -** Jump to P2 if the value in register P1 is False. The value is +** Jump to P2 if the value in register P1 is False. The value ** is considered true if it has a numeric value of zero. If the value ** in P1 is NULL then take the jump if P3 is true. */ @@ -64801,6 +65369,17 @@ case OP_Savepoint: { }else{ u.aq.nName = sqlite3Strlen30(u.aq.zName); +#ifndef SQLITE_OMIT_VIRTUALTABLE + /* This call is Ok even if this savepoint is actually a transaction + ** savepoint (and therefore should not prompt xSavepoint()) callbacks. + ** If this is a transaction savepoint being opened, it is guaranteed + ** that the db->aVTrans[] array is empty. */ + assert( db->autoCommit==0 || db->nVTrans==0 ); + rc = sqlite3VtabSavepoint(db, SAVEPOINT_BEGIN, + db->nStatement+db->nSavepoint); + if( rc!=SQLITE_OK ) goto abort_due_to_error; +#endif + /* Create a new savepoint structure. */ u.aq.pNew = sqlite3DbMallocRaw(db, sizeof(Savepoint)+u.aq.nName+1); if( u.aq.pNew ){ @@ -64907,6 +65486,11 @@ case OP_Savepoint: { }else{ db->nDeferredCons = u.aq.pSavepoint->nDeferredCons; } + + if( !isTransaction ){ + rc = sqlite3VtabSavepoint(db, u.aq.p1, u.aq.iSavepoint); + if( rc!=SQLITE_OK ) goto abort_due_to_error; + } } } @@ -65046,7 +65630,11 @@ case OP_Transaction: { db->nStatement++; p->iStatement = db->nSavepoint + db->nStatement; } - rc = sqlite3BtreeBeginStmt(u.as.pBt, p->iStatement); + + rc = sqlite3VtabSavepoint(db, SAVEPOINT_BEGIN, p->iStatement-1); + if( rc==SQLITE_OK ){ + rc = sqlite3BtreeBeginStmt(u.as.pBt, p->iStatement); + } /* Store the current value of the database handles deferred constraint ** counter. If the statement transaction needs to be rolled back, @@ -65367,7 +65955,7 @@ case OP_OpenEphemeral: { u.ax.pCx = allocateCursor(p, pOp->p1, pOp->p2, -1, 1); if( u.ax.pCx==0 ) goto no_mem; u.ax.pCx->nullRow = 1; - rc = sqlite3BtreeOpen(0, db, &u.ax.pCx->pBt, + rc = sqlite3BtreeOpen(db->pVfs, 0, db, &u.ax.pCx->pBt, BTREE_OMIT_JOURNAL | BTREE_SINGLE | pOp->p5, vfsFlags); if( rc==SQLITE_OK ){ rc = sqlite3BtreeBeginTrans(u.ax.pCx->pBt, 1); @@ -65854,7 +66442,7 @@ case OP_IsUnique: { /* jump, in3 */ /* Opcode: NotExists P1 P2 P3 * * ** -** Use the content of register P3 as a integer key. If a record +** Use the content of register P3 as an integer key. If a record ** with that key does not exist in table of P1, then jump to P2. ** If the record does exist, then fall through. The cursor is left ** pointing to the record if it exists. @@ -65932,7 +66520,7 @@ case OP_Sequence: { /* out2-prerelease */ ** If P3>0 then P3 is a register in the root frame of this VDBE that holds ** the largest previously generated record number. No new record numbers are ** allowed to be less than this value. When this value reaches its maximum, -** a SQLITE_FULL error is generated. The P3 register is updated with the ' +** an SQLITE_FULL error is generated. The P3 register is updated with the ' ** generated record number. This P3 mechanism is used to help implement the ** AUTOINCREMENT feature. */ @@ -66041,7 +66629,7 @@ case OP_NewRowid: { /* out2-prerelease */ assert( pOp->p3==0 ); /* We cannot be in random rowid mode if this is ** an AUTOINCREMENT table. */ /* on the first attempt, simply do one more than previous */ - u.be.v = db->lastRowid; + u.be.v = lastRowid; u.be.v &= (MAX_ROWID>>1); /* ensure doesn't go negative */ u.be.v++; /* ensure non-zero */ u.be.cnt = 0; @@ -66153,7 +66741,7 @@ case OP_InsertInt: { } if( pOp->p5 & OPFLAG_NCHANGE ) p->nChange++; - if( pOp->p5 & OPFLAG_LASTROWID ) db->lastRowid = u.bf.iKey; + if( pOp->p5 & OPFLAG_LASTROWID ) db->lastRowid = lastRowid = u.bf.iKey; if( u.bf.pData->flags & MEM_Null ){ u.bf.pData->z = 0; u.bf.pData->n = 0; @@ -66574,7 +67162,7 @@ case OP_Next: { /* jump */ /* Opcode: IdxInsert P1 P2 P3 * P5 ** -** Register P2 holds a SQL index key made using the +** Register P2 holds an SQL index key made using the ** MakeRecord instructions. This opcode writes that key ** into the index P1. Data for the entry is nil. ** @@ -67279,7 +67867,7 @@ case OP_Program: { /* jump */ p->nFrame++; u.by.pFrame->pParent = p->pFrame; - u.by.pFrame->lastRowid = db->lastRowid; + u.by.pFrame->lastRowid = lastRowid; u.by.pFrame->nChange = p->nChange; p->nChange = 0; p->pFrame = u.by.pFrame; @@ -68090,11 +68678,15 @@ case OP_VUpdate: { Mem *pX; #endif /* local variables moved into u.cm */ + assert( pOp->p2==1 || pOp->p5==OE_Fail || pOp->p5==OE_Rollback + || pOp->p5==OE_Abort || pOp->p5==OE_Ignore || pOp->p5==OE_Replace + ); u.cm.pVtab = pOp->p4.pVtab->pVtab; u.cm.pModule = (sqlite3_module *)u.cm.pVtab->pModule; u.cm.nArg = pOp->p2; assert( pOp->p4type==P4_VTAB ); if( ALWAYS(u.cm.pModule->xUpdate) ){ + u8 vtabOnConflict = db->vtabOnConflict; u.cm.apArg = p->apArg; u.cm.pX = &aMem[pOp->p3]; for(u.cm.i=0; u.cm.i<u.cm.nArg; u.cm.i++){ @@ -68104,13 +68696,23 @@ case OP_VUpdate: { u.cm.apArg[u.cm.i] = u.cm.pX; u.cm.pX++; } + db->vtabOnConflict = pOp->p5; rc = u.cm.pModule->xUpdate(u.cm.pVtab, u.cm.nArg, u.cm.apArg, &u.cm.rowid); + db->vtabOnConflict = vtabOnConflict; importVtabErrMsg(p, u.cm.pVtab); if( rc==SQLITE_OK && pOp->p1 ){ assert( u.cm.nArg>1 && u.cm.apArg[0] && (u.cm.apArg[0]->flags&MEM_Null) ); - db->lastRowid = u.cm.rowid; + db->lastRowid = lastRowid = u.cm.rowid; + } + if( rc==SQLITE_CONSTRAINT && pOp->p4.pVtab->bConstraint ){ + if( pOp->p5==OE_Ignore ){ + rc = SQLITE_OK; + }else{ + p->errorAction = ((pOp->p5==OE_Replace) ? OE_Abort : pOp->p5); + } + }else{ + p->nChange++; } - p->nChange++; } break; } @@ -68162,21 +68764,21 @@ case OP_MaxPgcnt: { /* out2-prerelease */ case OP_Trace: { #if 0 /* local variables moved into u.cn */ char *zTrace; + char *z; #endif /* local variables moved into u.cn */ - u.cn.zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql); - if( u.cn.zTrace ){ - if( db->xTrace ){ - char *z = sqlite3VdbeExpandSql(p, u.cn.zTrace); - db->xTrace(db->pTraceArg, z); - sqlite3DbFree(db, z); - } + if( db->xTrace && (u.cn.zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql))!=0 ){ + u.cn.z = sqlite3VdbeExpandSql(p, u.cn.zTrace); + db->xTrace(db->pTraceArg, u.cn.z); + sqlite3DbFree(db, u.cn.z); + } #ifdef SQLITE_DEBUG - if( (db->flags & SQLITE_SqlTrace)!=0 ){ - sqlite3DebugPrintf("SQL-trace: %s\n", u.cn.zTrace); - } -#endif /* SQLITE_DEBUG */ + if( (db->flags & SQLITE_SqlTrace)!=0 + && (u.cn.zTrace = (pOp->p4.z ? pOp->p4.z : p->zSql))!=0 + ){ + sqlite3DebugPrintf("SQL-trace: %s\n", u.cn.zTrace); } +#endif /* SQLITE_DEBUG */ break; } #endif @@ -68260,6 +68862,7 @@ vdbe_error_halt: ** release the mutexes on btrees that were acquired at the ** top. */ vdbe_return: + db->lastRowid = lastRowid; sqlite3VdbeLeave(p); return rc; @@ -68600,7 +69203,10 @@ SQLITE_API int sqlite3_blob_open( sqlite3VdbeChangeP4(v, 3+flags, SQLITE_INT_TO_PTR(pTab->nCol+1),P4_INT32); sqlite3VdbeChangeP2(v, 7, pTab->nCol); if( !db->mallocFailed ){ - sqlite3VdbeMakeReady(v, 1, 1, 1, 0, 0, 0); + pParse->nVar = 1; + pParse->nMem = 1; + pParse->nTab = 1; + sqlite3VdbeMakeReady(v, pParse); } } @@ -71167,53 +71773,53 @@ SQLITE_PRIVATE void sqlite3ExprAssignVarNumber(Parse *pParse, Expr *pExpr){ /* Wildcard of the form "?". Assign the next variable number */ assert( z[0]=='?' ); pExpr->iColumn = (ynVar)(++pParse->nVar); - }else if( z[0]=='?' ){ - /* Wildcard of the form "?nnn". Convert "nnn" to an integer and - ** use it as the variable number */ - i64 i; - int bOk = 0==sqlite3Atoi64(&z[1], &i, sqlite3Strlen30(&z[1]), SQLITE_UTF8); - pExpr->iColumn = (ynVar)i; - testcase( i==0 ); - testcase( i==1 ); - testcase( i==db->aLimit[SQLITE_LIMIT_VARIABLE_NUMBER]-1 ); - testcase( i==db->aLimit[SQLITE_LIMIT_VARIABLE_NUMBER] ); - if( bOk==0 || i<1 || i>db->aLimit[SQLITE_LIMIT_VARIABLE_NUMBER] ){ - sqlite3ErrorMsg(pParse, "variable number must be between ?1 and ?%d", - db->aLimit[SQLITE_LIMIT_VARIABLE_NUMBER]); - } - if( i>pParse->nVar ){ - pParse->nVar = (int)i; - } }else{ - /* Wildcards like ":aaa", "$aaa" or "@aaa". Reuse the same variable - ** number as the prior appearance of the same name, or if the name - ** has never appeared before, reuse the same variable number - */ - int i; - u32 n; - n = sqlite3Strlen30(z); - for(i=0; i<pParse->nVarExpr; i++){ - Expr *pE = pParse->apVarExpr[i]; - assert( pE!=0 ); - if( memcmp(pE->u.zToken, z, n)==0 && pE->u.zToken[n]==0 ){ - pExpr->iColumn = pE->iColumn; - break; + ynVar x = 0; + u32 n = sqlite3Strlen30(z); + if( z[0]=='?' ){ + /* Wildcard of the form "?nnn". Convert "nnn" to an integer and + ** use it as the variable number */ + i64 i; + int bOk = 0==sqlite3Atoi64(&z[1], &i, n-1, SQLITE_UTF8); + pExpr->iColumn = x = (ynVar)i; + testcase( i==0 ); + testcase( i==1 ); + testcase( i==db->aLimit[SQLITE_LIMIT_VARIABLE_NUMBER]-1 ); + testcase( i==db->aLimit[SQLITE_LIMIT_VARIABLE_NUMBER] ); + if( bOk==0 || i<1 || i>db->aLimit[SQLITE_LIMIT_VARIABLE_NUMBER] ){ + sqlite3ErrorMsg(pParse, "variable number must be between ?1 and ?%d", + db->aLimit[SQLITE_LIMIT_VARIABLE_NUMBER]); + x = 0; + } + if( i>pParse->nVar ){ + pParse->nVar = (int)i; + } + }else{ + /* Wildcards like ":aaa", "$aaa" or "@aaa". Reuse the same variable + ** number as the prior appearance of the same name, or if the name + ** has never appeared before, reuse the same variable number + */ + ynVar i; + for(i=0; i<pParse->nzVar; i++){ + if( pParse->azVar[i] && memcmp(pParse->azVar[i],z,n+1)==0 ){ + pExpr->iColumn = x = (ynVar)i+1; + break; + } } + if( x==0 ) x = pExpr->iColumn = (ynVar)(++pParse->nVar); } - if( i>=pParse->nVarExpr ){ - pExpr->iColumn = (ynVar)(++pParse->nVar); - if( pParse->nVarExpr>=pParse->nVarExprAlloc-1 ){ - pParse->nVarExprAlloc += pParse->nVarExprAlloc + 10; - pParse->apVarExpr = - sqlite3DbReallocOrFree( - db, - pParse->apVarExpr, - pParse->nVarExprAlloc*sizeof(pParse->apVarExpr[0]) - ); + if( x>0 ){ + if( x>pParse->nzVar ){ + char **a; + a = sqlite3DbRealloc(db, pParse->azVar, x*sizeof(a[0])); + if( a==0 ) return; /* Error reported through db->mallocFailed */ + pParse->azVar = a; + memset(&a[pParse->nzVar], 0, (x-pParse->nzVar)*sizeof(a[0])); + pParse->nzVar = x; } - if( !db->mallocFailed ){ - assert( pParse->apVarExpr!=0 ); - pParse->apVarExpr[pParse->nVarExpr++] = pExpr; + if( z[0]!='?' || pParse->azVar[x-1]==0 ){ + sqlite3DbFree(db, pParse->azVar[x-1]); + pParse->azVar[x-1] = sqlite3DbStrNDup(db, z, n); } } } @@ -72957,7 +73563,9 @@ SQLITE_PRIVATE int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target) assert( pExpr->u.zToken[0]!=0 ); sqlite3VdbeAddOp2(v, OP_Variable, pExpr->iColumn, target); if( pExpr->u.zToken[1]!=0 ){ - sqlite3VdbeChangeP4(v, -1, pExpr->u.zToken, P4_TRANSIENT); + assert( pExpr->u.zToken[0]=='?' + || strcmp(pExpr->u.zToken, pParse->azVar[pExpr->iColumn-1])==0 ); + sqlite3VdbeChangeP4(v, -1, pParse->azVar[pExpr->iColumn-1], P4_STATIC); } break; } @@ -74727,14 +75335,14 @@ static void reloadTableSchema(Parse *pParse, Table *pTab, const char *zName){ /* Reload the table, index and permanent trigger schemas. */ zWhere = sqlite3MPrintf(pParse->db, "tbl_name=%Q", zName); if( !zWhere ) return; - sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0, zWhere, P4_DYNAMIC); + sqlite3VdbeAddParseSchemaOp(v, iDb, zWhere); #ifndef SQLITE_OMIT_TRIGGER /* Now, if the table is not stored in the temp database, reload any temp ** triggers. Don't use IN(...) in case SQLITE_OMIT_SUBQUERY is defined. */ if( (zWhere=whereTempTriggers(pParse, pTab))!=0 ){ - sqlite3VdbeAddOp4(v, OP_ParseSchema, 1, 0, 0, zWhere, P4_DYNAMIC); + sqlite3VdbeAddParseSchemaOp(v, 1, zWhere); } #endif } @@ -75988,8 +76596,12 @@ static void attachFunc( sqlite3 *db = sqlite3_context_db_handle(context); const char *zName; const char *zFile; + char *zPath = 0; + char *zErr = 0; + unsigned int flags; Db *aNew; char *zErrDyn = 0; + sqlite3_vfs *pVfs; UNUSED_PARAMETER(NotUsed); @@ -76042,8 +76654,18 @@ static void attachFunc( ** it to obtain the database schema. At this point the schema may ** or may not be initialised. */ - rc = sqlite3BtreeOpen(zFile, db, &aNew->pBt, 0, - db->openFlags | SQLITE_OPEN_MAIN_DB); + flags = db->openFlags; + rc = sqlite3ParseUri(db->pVfs->zName, zFile, &flags, &pVfs, &zPath, &zErr); + if( rc!=SQLITE_OK ){ + if( rc==SQLITE_NOMEM ) db->mallocFailed = 1; + sqlite3_result_error(context, zErr, -1); + sqlite3_free(zErr); + return; + } + assert( pVfs ); + flags |= SQLITE_OPEN_MAIN_DB; + rc = sqlite3BtreeOpen(pVfs, zPath, db, &aNew->pBt, 0, flags); + sqlite3_free( zPath ); db->nDb++; if( rc==SQLITE_CONSTRAINT ){ rc = SQLITE_ERROR; @@ -76914,9 +77536,7 @@ SQLITE_PRIVATE void sqlite3FinishCoding(Parse *pParse){ /* A minimum of one cursor is required if autoincrement is used * See ticket [a696379c1f08866] */ if( pParse->pAinc!=0 && pParse->nTab==0 ) pParse->nTab = 1; - sqlite3VdbeMakeReady(v, pParse->nVar, pParse->nMem, - pParse->nTab, pParse->nMaxArg, pParse->explain, - pParse->isMultiWrite && pParse->mayAbort); + sqlite3VdbeMakeReady(v, pParse); pParse->rc = SQLITE_DONE; pParse->colNamesSet = 0; }else{ @@ -78335,8 +78955,8 @@ SQLITE_PRIVATE void sqlite3EndTable( #endif /* Reparse everything to update our internal data structures */ - sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0, - sqlite3MPrintf(db, "tbl_name='%q'",p->zName), P4_DYNAMIC); + sqlite3VdbeAddParseSchemaOp(v, iDb, + sqlite3MPrintf(db, "tbl_name='%q'", p->zName)); } @@ -79533,9 +80153,8 @@ SQLITE_PRIVATE Index *sqlite3CreateIndex( if( pTblName ){ sqlite3RefillIndex(pParse, pIndex, iMem); sqlite3ChangeCookie(pParse, iDb); - sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0, - sqlite3MPrintf(db, "name='%q' AND type='index'", pIndex->zName), - P4_DYNAMIC); + sqlite3VdbeAddParseSchemaOp(v, iDb, + sqlite3MPrintf(db, "name='%q' AND type='index'", pIndex->zName)); sqlite3VdbeAddOp1(v, OP_Expire, 0); } } @@ -80157,7 +80776,7 @@ SQLITE_PRIVATE int sqlite3OpenTempDatabase(Parse *pParse){ SQLITE_OPEN_DELETEONCLOSE | SQLITE_OPEN_TEMP_DB; - rc = sqlite3BtreeOpen(0, db, &pBt, 0, flags); + rc = sqlite3BtreeOpen(db->pVfs, 0, db, &pBt, 0, flags); if( rc!=SQLITE_OK ){ sqlite3ErrorMsg(pParse, "unable to open a temporary database " "file for storing temporary tables"); @@ -81333,6 +81952,7 @@ SQLITE_PRIVATE void sqlite3DeleteFrom( const char *pVTab = (const char *)sqlite3GetVTable(db, pTab); sqlite3VtabMakeWritable(pParse, pTab); sqlite3VdbeAddOp4(v, OP_VUpdate, 0, 1, iRowid, pVTab, P4_VTAB); + sqlite3VdbeChangeP5(v, OE_Abort); sqlite3MayAbort(pParse); }else #endif @@ -81567,8 +82187,14 @@ SQLITE_PRIVATE int sqlite3GenerateIndexKey( } } if( doMakeRec ){ + const char *zAff; + if( pTab->pSelect || (pParse->db->flags & SQLITE_IdxRealAsInt)!=0 ){ + zAff = 0; + }else{ + zAff = sqlite3IndexAffinityStr(v, pIdx); + } sqlite3VdbeAddOp3(v, OP_MakeRecord, regBase, nCol+1, regOut); - sqlite3VdbeChangeP4(v, -1, sqlite3IndexAffinityStr(v, pIdx), P4_TRANSIENT); + sqlite3VdbeChangeP4(v, -1, zAff, P4_TRANSIENT); } sqlite3ReleaseTempRange(pParse, regBase, nCol+1); return regBase; @@ -82080,10 +82706,10 @@ struct compareInfo { ** whereas only characters less than 0x80 do in ASCII. */ #if defined(SQLITE_EBCDIC) -# define sqlite3Utf8Read(A,C) (*(A++)) -# define GlogUpperToLower(A) A = sqlite3UpperToLower[A] +# define sqlite3Utf8Read(A,C) (*(A++)) +# define GlogUpperToLower(A) A = sqlite3UpperToLower[A] #else -# define GlogUpperToLower(A) if( A<0x80 ){ A = sqlite3UpperToLower[A]; } +# define GlogUpperToLower(A) if( !((A)&~0x7f) ){ A = sqlite3UpperToLower[A]; } #endif static const struct compareInfo globInfo = { '*', '?', '[', 0 }; @@ -82126,9 +82752,9 @@ static int patternCompare( const u8 *zPattern, /* The glob pattern */ const u8 *zString, /* The string to compare against the glob */ const struct compareInfo *pInfo, /* Information about how to do the compare */ - const int esc /* The escape character */ + u32 esc /* The escape character */ ){ - int c, c2; + u32 c, c2; int invert; int seen; u8 matchOne = pInfo->matchOne; @@ -82182,7 +82808,7 @@ static int patternCompare( return 0; } }else if( c==matchSet ){ - int prior_c = 0; + u32 prior_c = 0; assert( esc==0 ); /* This only occurs for GLOB, not LIKE */ seen = 0; invert = 0; @@ -82258,7 +82884,7 @@ static void likeFunc( sqlite3_value **argv ){ const unsigned char *zA, *zB; - int escape = 0; + u32 escape = 0; int nPat; sqlite3 *db = sqlite3_context_db_handle(context); @@ -82349,6 +82975,21 @@ static void sourceidFunc( } /* +** Implementation of the sqlite_log() function. This is a wrapper around +** sqlite3_log(). The return value is NULL. The function exists purely for +** its side-effects. +*/ +static void errlogFunc( + sqlite3_context *context, + int argc, + sqlite3_value **argv +){ + UNUSED_PARAMETER(argc); + UNUSED_PARAMETER(context); + sqlite3_log(sqlite3_value_int(argv[0]), "%s", sqlite3_value_text(argv[1])); +} + +/* ** Implementation of the sqlite_compileoption_used() function. ** The result is an integer that identifies if the compiler option ** was used to build SQLite. @@ -83115,6 +83756,7 @@ SQLITE_PRIVATE void sqlite3RegisterGlobalFunctions(void){ FUNCTION(nullif, 2, 0, 1, nullifFunc ), FUNCTION(sqlite_version, 0, 0, 0, versionFunc ), FUNCTION(sqlite_source_id, 0, 0, 0, sourceidFunc ), + FUNCTION(sqlite_log, 2, 0, 0, errlogFunc ), #ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS FUNCTION(sqlite_compileoption_used,1, 0, 0, compileoptionusedFunc ), FUNCTION(sqlite_compileoption_get, 1, 0, 0, compileoptiongetFunc ), @@ -83553,13 +84195,25 @@ static void fkLookupParent( /* If the parent table is the same as the child table, and we are about ** to increment the constraint-counter (i.e. this is an INSERT operation), ** then check if the row being inserted matches itself. If so, do not - ** increment the constraint-counter. */ + ** increment the constraint-counter. + ** + ** If any of the parent-key values are NULL, then the row cannot match + ** itself. So set JUMPIFNULL to make sure we do the OP_Found if any + ** of the parent-key values are NULL (at this point it is known that + ** none of the child key values are). + */ if( pTab==pFKey->pFrom && nIncr==1 ){ int iJump = sqlite3VdbeCurrentAddr(v) + nCol + 1; for(i=0; i<nCol; i++){ int iChild = aiCol[i]+1+regData; int iParent = pIdx->aiColumn[i]+1+regData; + assert( aiCol[i]!=pTab->iPKey ); + if( pIdx->aiColumn[i]==pTab->iPKey ){ + /* The parent key is a composite key that includes the IPK column */ + iParent = regData; + } sqlite3VdbeAddOp3(v, OP_Ne, iChild, iJump, iParent); + sqlite3VdbeChangeP5(v, SQLITE_JUMPIFNULL); } sqlite3VdbeAddOp2(v, OP_Goto, 0, iOk); } @@ -85327,6 +85981,7 @@ SQLITE_PRIVATE void sqlite3Insert( const char *pVTab = (const char *)sqlite3GetVTable(db, pTab); sqlite3VtabMakeWritable(pParse, pTab); sqlite3VdbeAddOp4(v, OP_VUpdate, 1, pTab->nCol+2, regIns, pVTab, P4_VTAB); + sqlite3VdbeChangeP5(v, onError==OE_Default ? OE_Abort : onError); sqlite3MayAbort(pParse); }else #endif @@ -86092,6 +86747,18 @@ static int xferOptimization( return 0; /* Tables have different CHECK constraints. Ticket #2252 */ } #endif +#ifndef SQLITE_OMIT_FOREIGN_KEY + /* Disallow the transfer optimization if the destination table constains + ** any foreign key constraints. This is more restrictive than necessary. + ** But the main beneficiary of the transfer optimization is the VACUUM + ** command, and the VACUUM command disables foreign key constraints. So + ** the extra complication to make this rule less restrictive is probably + ** not worth the effort. Ticket [6284df89debdfa61db8073e062908af0c9b6118e] + */ + if( (pParse->db->flags & SQLITE_ForeignKeys)!=0 && pDest->pFKey!=0 ){ + return 0; + } +#endif /* If we get this far, it means either: ** @@ -87424,10 +88091,6 @@ SQLITE_PRIVATE void sqlite3AutoLoadExtensions(sqlite3 *db){ ** This file contains code used to implement the PRAGMA command. */ -/* Ignore this whole file if pragmas are disabled -*/ -#if !defined(SQLITE_OMIT_PRAGMA) - /* ** Interpret the given string as a safety level. Return 0 for OFF, ** 1 for ON or NORMAL and 2 for FULL. Return 1 for an empty or @@ -87460,10 +88123,16 @@ static u8 getSafetyLevel(const char *z){ /* ** Interpret the given string as a boolean value. */ -static u8 getBoolean(const char *z){ +SQLITE_PRIVATE u8 sqlite3GetBoolean(const char *z){ return getSafetyLevel(z)&1; } +/* The sqlite3GetBoolean() function is used by other modules but the +** remainder of this file is specific to PRAGMA processing. So omit +** the rest of the file if PRAGMAs are omitted from the build. +*/ +#if !defined(SQLITE_OMIT_PRAGMA) + /* ** Interpret the given string as a locking mode value. */ @@ -87630,7 +88299,7 @@ static int flagPragma(Parse *pParse, const char *zLeft, const char *zRight){ mask &= ~(SQLITE_ForeignKeys); } - if( getBoolean(zRight) ){ + if( sqlite3GetBoolean(zRight) ){ db->flags |= mask; }else{ db->flags &= ~mask; @@ -87844,7 +88513,7 @@ SQLITE_PRIVATE void sqlite3Pragma( int b = -1; assert( pBt!=0 ); if( zRight ){ - b = getBoolean(zRight); + b = sqlite3GetBoolean(zRight); } if( pId2->n==0 && b>=0 ){ int ii; @@ -88444,7 +89113,7 @@ SQLITE_PRIVATE void sqlite3Pragma( #ifndef NDEBUG if( sqlite3StrICmp(zLeft, "parser_trace")==0 ){ if( zRight ){ - if( getBoolean(zRight) ){ + if( sqlite3GetBoolean(zRight) ){ sqlite3ParserTrace(stderr, "parser: "); }else{ sqlite3ParserTrace(0, 0); @@ -88458,7 +89127,7 @@ SQLITE_PRIVATE void sqlite3Pragma( */ if( sqlite3StrICmp(zLeft, "case_sensitive_like")==0 ){ if( zRight ){ - sqlite3RegisterLikeFunctions(db, getBoolean(zRight)); + sqlite3RegisterLikeFunctions(db, sqlite3GetBoolean(zRight)); } }else @@ -94036,11 +94705,13 @@ SQLITE_PRIVATE int sqlite3Select( ** and pKeyInfo to the KeyInfo structure required to navigate the ** index. ** + ** (2011-04-15) Do not do a full scan of an unordered index. + ** ** In practice the KeyInfo structure will not be used. It is only ** passed to keep OP_OpenRead happy. */ for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){ - if( !pBest || pIdx->nColumn<pBest->nColumn ){ + if( pIdx->bUnordered==0 && (!pBest || pIdx->nColumn<pBest->nColumn) ){ pBest = pIdx; } } @@ -94762,9 +95433,8 @@ SQLITE_PRIVATE void sqlite3FinishTrigger( pTrig->table, z); sqlite3DbFree(db, z); sqlite3ChangeCookie(pParse, iDb); - sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0, sqlite3MPrintf( - db, "type='trigger' AND name='%q'", zName), P4_DYNAMIC - ); + sqlite3VdbeAddParseSchemaOp(v, iDb, + sqlite3MPrintf(db, "type='trigger' AND name='%q'", zName)); } if( db->init.busy ){ @@ -95597,7 +96267,8 @@ static void updateVirtualTable( ExprList *pChanges, /* The columns to change in the UPDATE statement */ Expr *pRowidExpr, /* Expression used to recompute the rowid */ int *aXRef, /* Mapping from columns of pTab to entries in pChanges */ - Expr *pWhere /* WHERE clause of the UPDATE statement */ + Expr *pWhere, /* WHERE clause of the UPDATE statement */ + int onError /* ON CONFLICT strategy */ ); #endif /* SQLITE_OMIT_VIRTUALTABLE */ @@ -95817,7 +96488,7 @@ SQLITE_PRIVATE void sqlite3Update( } for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){ int reg; - if( chngRowid ){ + if( hasFK || chngRowid ){ reg = ++pParse->nMem; }else{ reg = 0; @@ -95841,7 +96512,7 @@ SQLITE_PRIVATE void sqlite3Update( /* Virtual tables must be handled separately */ if( IsVirtual(pTab) ){ updateVirtualTable(pParse, pTabList, pTab, pChanges, pRowidExpr, aXRef, - pWhere); + pWhere, onError); pWhere = 0; pTabList = 0; goto update_cleanup; @@ -96171,7 +96842,8 @@ static void updateVirtualTable( ExprList *pChanges, /* The columns to change in the UPDATE statement */ Expr *pRowid, /* Expression used to recompute the rowid */ int *aXRef, /* Mapping from columns of pTab to entries in pChanges */ - Expr *pWhere /* WHERE clause of the UPDATE statement */ + Expr *pWhere, /* WHERE clause of the UPDATE statement */ + int onError /* ON CONFLICT strategy */ ){ Vdbe *v = pParse->pVdbe; /* Virtual machine under construction */ ExprList *pEList = 0; /* The result set of the SELECT statement */ @@ -96228,6 +96900,7 @@ static void updateVirtualTable( } sqlite3VtabMakeWritable(pParse, pTab); sqlite3VdbeAddOp4(v, OP_VUpdate, 0, pTab->nCol+2, iReg, pVTab, P4_VTAB); + sqlite3VdbeChangeP5(v, onError==OE_Default ? OE_Abort : onError); sqlite3MayAbort(pParse); sqlite3VdbeAddOp2(v, OP_Next, ephemTab, addr+1); sqlite3VdbeJumpHere(v, addr); @@ -96602,6 +97275,18 @@ end_of_vacuum: #ifndef SQLITE_OMIT_VIRTUALTABLE /* +** Before a virtual table xCreate() or xConnect() method is invoked, the +** sqlite3.pVtabCtx member variable is set to point to an instance of +** this struct allocated on the stack. It is used by the implementation of +** the sqlite3_declare_vtab() and sqlite3_vtab_config() APIs, both of which +** are invoked only from within xCreate and xConnect methods. +*/ +struct VtabCtx { + Table *pTab; + VTable *pVTable; +}; + +/* ** The actual function that does the work of creating a new module. ** This function implements the sqlite3_create_module() and ** sqlite3_create_module_v2() interfaces. @@ -96629,13 +97314,13 @@ static int createModule( pMod->xDestroy = xDestroy; pDel = (Module *)sqlite3HashInsert(&db->aModule, zCopy, nName, (void*)pMod); if( pDel && pDel->xDestroy ){ + sqlite3ResetInternalSchema(db, -1); pDel->xDestroy(pDel->pAux); } sqlite3DbFree(db, pDel); if( pDel==pMod ){ db->mallocFailed = 1; } - sqlite3ResetInternalSchema(db, -1); }else if( xDestroy ){ xDestroy(pAux); } @@ -96958,7 +97643,7 @@ SQLITE_PRIVATE void sqlite3VtabFinishParse(Parse *pParse, Token *pEnd){ sqlite3VdbeAddOp2(v, OP_Expire, 0, 0); zWhere = sqlite3MPrintf(db, "name='%q' AND type='table'", pTab->zName); - sqlite3VdbeAddOp4(v, OP_ParseSchema, iDb, 0, 0, zWhere, P4_DYNAMIC); + sqlite3VdbeAddParseSchemaOp(v, iDb, zWhere); sqlite3VdbeAddOp4(v, OP_VCreate, iDb, 0, 0, pTab->zName, sqlite3Strlen30(pTab->zName) + 1); } @@ -97021,6 +97706,7 @@ static int vtabCallConstructor( int (*xConstruct)(sqlite3*,void*,int,const char*const*,sqlite3_vtab**,char**), char **pzErr ){ + VtabCtx sCtx; VTable *pVTable; int rc; const char *const*azArg = (const char *const*)pTab->azModuleArg; @@ -97040,12 +97726,14 @@ static int vtabCallConstructor( pVTable->db = db; pVTable->pMod = pMod; - assert( !db->pVTab ); - assert( xConstruct ); - db->pVTab = pTab; - /* Invoke the virtual table constructor */ + assert( &db->pVtabCtx ); + assert( xConstruct ); + sCtx.pTab = pTab; + sCtx.pVTable = pVTable; + db->pVtabCtx = &sCtx; rc = xConstruct(db, pMod->pAux, nArg, azArg, &pVTable->pVtab, &zErr); + db->pVtabCtx = 0; if( rc==SQLITE_NOMEM ) db->mallocFailed = 1; if( SQLITE_OK!=rc ){ @@ -97061,7 +97749,7 @@ static int vtabCallConstructor( ** the sqlite3_vtab object if successful. */ pVTable->pVtab->pModule = pMod->pModule; pVTable->nRef = 1; - if( db->pVTab ){ + if( sCtx.pTab ){ const char *zFormat = "vtable constructor did not declare schema: %s"; *pzErr = sqlite3MPrintf(db, zFormat, pTab->zName); sqlite3VtabUnlock(pVTable); @@ -97109,7 +97797,6 @@ static int vtabCallConstructor( } sqlite3DbFree(db, zModuleName); - db->pVTab = 0; return rc; } @@ -97150,11 +97837,11 @@ SQLITE_PRIVATE int sqlite3VtabCallConnect(Parse *pParse, Table *pTab){ return rc; } - /* -** Add the virtual table pVTab to the array sqlite3.aVTrans[]. +** Grow the db->aVTrans[] array so that there is room for at least one +** more v-table. Return SQLITE_NOMEM if a malloc fails, or SQLITE_OK otherwise. */ -static int addToVTrans(sqlite3 *db, VTable *pVTab){ +static int growVTrans(sqlite3 *db){ const int ARRAY_INCR = 5; /* Grow the sqlite3.aVTrans array if required */ @@ -97169,10 +97856,17 @@ static int addToVTrans(sqlite3 *db, VTable *pVTab){ db->aVTrans = aVTrans; } + return SQLITE_OK; +} + +/* +** Add the virtual table pVTab to the array sqlite3.aVTrans[]. Space should +** have already been reserved using growVTrans(). +*/ +static void addToVTrans(sqlite3 *db, VTable *pVTab){ /* Add pVtab to the end of sqlite3.aVTrans */ db->aVTrans[db->nVTrans++] = pVTab; sqlite3VtabLock(pVTab); - return SQLITE_OK; } /* @@ -97210,7 +97904,10 @@ SQLITE_PRIVATE int sqlite3VtabCallCreate(sqlite3 *db, int iDb, const char *zTab, /* Justification of ALWAYS(): The xConstructor method is required to ** create a valid sqlite3_vtab if it returns SQLITE_OK. */ if( rc==SQLITE_OK && ALWAYS(sqlite3GetVTable(db, pTab)) ){ - rc = addToVTrans(db, sqlite3GetVTable(db, pTab)); + rc = growVTrans(db); + if( rc==SQLITE_OK ){ + addToVTrans(db, sqlite3GetVTable(db, pTab)); + } } return rc; @@ -97229,8 +97926,7 @@ SQLITE_API int sqlite3_declare_vtab(sqlite3 *db, const char *zCreateTable){ char *zErr = 0; sqlite3_mutex_enter(db->mutex); - pTab = db->pVTab; - if( !pTab ){ + if( !db->pVtabCtx || !(pTab = db->pVtabCtx->pTab) ){ sqlite3Error(db, SQLITE_MISUSE, 0); sqlite3_mutex_leave(db->mutex); return SQLITE_MISUSE_BKPT; @@ -97257,7 +97953,7 @@ SQLITE_API int sqlite3_declare_vtab(sqlite3 *db, const char *zCreateTable){ pParse->pNewTable->nCol = 0; pParse->pNewTable->aCol = 0; } - db->pVTab = 0; + db->pVtabCtx->pTab = 0; }else{ sqlite3Error(db, SQLITE_ERROR, (zErr ? "%s" : 0), zErr); sqlite3DbFree(db, zErr); @@ -97327,6 +98023,7 @@ static void callFinaliser(sqlite3 *db, int offset){ x = *(int (**)(sqlite3_vtab *))((char *)p->pModule + offset); if( x ) x(p); } + pVTab->iSavepoint = 0; sqlite3VtabUnlock(pVTab); } sqlite3DbFree(db, db->aVTrans); @@ -97409,7 +98106,6 @@ SQLITE_PRIVATE int sqlite3VtabBegin(sqlite3 *db, VTable *pVTab){ if( pModule->xBegin ){ int i; - /* If pVtab is already in the aVTrans array, return early */ for(i=0; i<db->nVTrans; i++){ if( db->aVTrans[i]==pVTab ){ @@ -97417,10 +98113,62 @@ SQLITE_PRIVATE int sqlite3VtabBegin(sqlite3 *db, VTable *pVTab){ } } - /* Invoke the xBegin method */ - rc = pModule->xBegin(pVTab->pVtab); + /* Invoke the xBegin method. If successful, add the vtab to the + ** sqlite3.aVTrans[] array. */ + rc = growVTrans(db); if( rc==SQLITE_OK ){ - rc = addToVTrans(db, pVTab); + rc = pModule->xBegin(pVTab->pVtab); + if( rc==SQLITE_OK ){ + addToVTrans(db, pVTab); + } + } + } + return rc; +} + +/* +** Invoke either the xSavepoint, xRollbackTo or xRelease method of all +** virtual tables that currently have an open transaction. Pass iSavepoint +** as the second argument to the virtual table method invoked. +** +** If op is SAVEPOINT_BEGIN, the xSavepoint method is invoked. If it is +** SAVEPOINT_ROLLBACK, the xRollbackTo method. Otherwise, if op is +** SAVEPOINT_RELEASE, then the xRelease method of each virtual table with +** an open transaction is invoked. +** +** If any virtual table method returns an error code other than SQLITE_OK, +** processing is abandoned and the error returned to the caller of this +** function immediately. If all calls to virtual table methods are successful, +** SQLITE_OK is returned. +*/ +SQLITE_PRIVATE int sqlite3VtabSavepoint(sqlite3 *db, int op, int iSavepoint){ + int rc = SQLITE_OK; + + assert( op==SAVEPOINT_RELEASE||op==SAVEPOINT_ROLLBACK||op==SAVEPOINT_BEGIN ); + assert( iSavepoint>=0 ); + if( db->aVTrans ){ + int i; + for(i=0; rc==SQLITE_OK && i<db->nVTrans; i++){ + VTable *pVTab = db->aVTrans[i]; + const sqlite3_module *pMod = pVTab->pMod->pModule; + if( pMod->iVersion>=2 ){ + int (*xMethod)(sqlite3_vtab *, int); + switch( op ){ + case SAVEPOINT_BEGIN: + xMethod = pMod->xSavepoint; + pVTab->iSavepoint = iSavepoint+1; + break; + case SAVEPOINT_ROLLBACK: + xMethod = pMod->xRollbackTo; + break; + default: + xMethod = pMod->xRelease; + break; + } + if( xMethod && pVTab->iSavepoint>iSavepoint ){ + rc = xMethod(db->aVTrans[i]->pVtab, iSavepoint); + } + } } } return rc; @@ -97524,6 +98272,57 @@ SQLITE_PRIVATE void sqlite3VtabMakeWritable(Parse *pParse, Table *pTab){ } } +/* +** Return the ON CONFLICT resolution mode in effect for the virtual +** table update operation currently in progress. +** +** The results of this routine are undefined unless it is called from +** within an xUpdate method. +*/ +SQLITE_API int sqlite3_vtab_on_conflict(sqlite3 *db){ + static const unsigned char aMap[] = { + SQLITE_ROLLBACK, SQLITE_ABORT, SQLITE_FAIL, SQLITE_IGNORE, SQLITE_REPLACE + }; + assert( OE_Rollback==1 && OE_Abort==2 && OE_Fail==3 ); + assert( OE_Ignore==4 && OE_Replace==5 ); + assert( db->vtabOnConflict>=1 && db->vtabOnConflict<=5 ); + return (int)aMap[db->vtabOnConflict-1]; +} + +/* +** Call from within the xCreate() or xConnect() methods to provide +** the SQLite core with additional information about the behavior +** of the virtual table being implemented. +*/ +SQLITE_API int sqlite3_vtab_config(sqlite3 *db, int op, ...){ + va_list ap; + int rc = SQLITE_OK; + + sqlite3_mutex_enter(db->mutex); + + va_start(ap, op); + switch( op ){ + case SQLITE_VTAB_CONSTRAINT_SUPPORT: { + VtabCtx *p = db->pVtabCtx; + if( !p ){ + rc = SQLITE_MISUSE_BKPT; + }else{ + assert( p->pTab==0 || (p->pTab->tabFlags & TF_Virtual)!=0 ); + p->pVTable->bConstraint = (u8)va_arg(ap, int); + } + break; + } + default: + rc = SQLITE_MISUSE_BKPT; + break; + } + va_end(ap); + + if( rc!=SQLITE_OK ) sqlite3Error(db, rc, 0); + sqlite3_mutex_leave(db->mutex); + return rc; +} + #endif /* SQLITE_OMIT_VIRTUALTABLE */ /************** End of vtab.c ************************************************/ @@ -106571,13 +107370,12 @@ SQLITE_PRIVATE int sqlite3GetToken(const unsigned char *z, int *tokenType){ testcase( z[0]=='x' ); testcase( z[0]=='X' ); if( z[1]=='\'' ){ *tokenType = TK_BLOB; - for(i=2; (c=z[i])!=0 && c!='\''; i++){ - if( !sqlite3Isxdigit(c) ){ - *tokenType = TK_ILLEGAL; - } + for(i=2; sqlite3Isxdigit(z[i]); i++){} + if( z[i]!='\'' || i%2 ){ + *tokenType = TK_ILLEGAL; + while( z[i] && z[i]!='\'' ){ i++; } } - if( i%2 || !c ) *tokenType = TK_ILLEGAL; - if( c ) i++; + if( z[i] ) i++; return i; } /* Otherwise fall through to the next case */ @@ -106630,9 +107428,8 @@ SQLITE_PRIVATE int sqlite3RunParser(Parse *pParse, const char *zSql, char **pzEr assert( pParse->pNewTable==0 ); assert( pParse->pNewTrigger==0 ); assert( pParse->nVar==0 ); - assert( pParse->nVarExpr==0 ); - assert( pParse->nVarExprAlloc==0 ); - assert( pParse->apVarExpr==0 ); + assert( pParse->nzVar==0 ); + assert( pParse->azVar==0 ); enableLookaside = db->lookaside.bEnabled; if( db->lookaside.pStart ) db->lookaside.bEnabled = 1; while( !db->mallocFailed && zSql[i]!=0 ){ @@ -106726,7 +107523,8 @@ abort_parse: } sqlite3DeleteTrigger(db, pParse->pNewTrigger); - sqlite3DbFree(db, pParse->apVarExpr); + for(i=pParse->nzVar-1; i>=0; i--) sqlite3DbFree(db, pParse->azVar[i]); + sqlite3DbFree(db, pParse->azVar); sqlite3DbFree(db, pParse->aAlias); while( pParse->pAinc ){ AutoincInfo *p = pParse->pAinc; @@ -107546,6 +108344,11 @@ SQLITE_API int sqlite3_config(int op, ...){ break; } + case SQLITE_CONFIG_URI: { + sqlite3GlobalConfig.bOpenUri = va_arg(ap, int); + break; + } + default: { rc = SQLITE_ERROR; break; @@ -108906,6 +109709,236 @@ SQLITE_API int sqlite3_limit(sqlite3 *db, int limitId, int newLimit){ } /* +** This function is used to parse both URIs and non-URI filenames passed by the +** user to API functions sqlite3_open() or sqlite3_open_v2(), and for database +** URIs specified as part of ATTACH statements. +** +** The first argument to this function is the name of the VFS to use (or +** a NULL to signify the default VFS) if the URI does not contain a "vfs=xxx" +** query parameter. The second argument contains the URI (or non-URI filename) +** itself. When this function is called the *pFlags variable should contain +** the default flags to open the database handle with. The value stored in +** *pFlags may be updated before returning if the URI filename contains +** "cache=xxx" or "mode=xxx" query parameters. +** +** If successful, SQLITE_OK is returned. In this case *ppVfs is set to point to +** the VFS that should be used to open the database file. *pzFile is set to +** point to a buffer containing the name of the file to open. It is the +** responsibility of the caller to eventually call sqlite3_free() to release +** this buffer. +** +** If an error occurs, then an SQLite error code is returned and *pzErrMsg +** may be set to point to a buffer containing an English language error +** message. It is the responsibility of the caller to eventually release +** this buffer by calling sqlite3_free(). +*/ +SQLITE_PRIVATE int sqlite3ParseUri( + const char *zDefaultVfs, /* VFS to use if no "vfs=xxx" query option */ + const char *zUri, /* Nul-terminated URI to parse */ + unsigned int *pFlags, /* IN/OUT: SQLITE_OPEN_XXX flags */ + sqlite3_vfs **ppVfs, /* OUT: VFS to use */ + char **pzFile, /* OUT: Filename component of URI */ + char **pzErrMsg /* OUT: Error message (if rc!=SQLITE_OK) */ +){ + int rc = SQLITE_OK; + unsigned int flags = *pFlags; + const char *zVfs = zDefaultVfs; + char *zFile; + char c; + int nUri = sqlite3Strlen30(zUri); + + assert( *pzErrMsg==0 ); + + if( ((flags & SQLITE_OPEN_URI) || sqlite3GlobalConfig.bOpenUri) + && nUri>=5 && memcmp(zUri, "file:", 5)==0 + ){ + char *zOpt; + int eState; /* Parser state when parsing URI */ + int iIn; /* Input character index */ + int iOut = 0; /* Output character index */ + int nByte = nUri+2; /* Bytes of space to allocate */ + + /* Make sure the SQLITE_OPEN_URI flag is set to indicate to the VFS xOpen + ** method that there may be extra parameters following the file-name. */ + flags |= SQLITE_OPEN_URI; + + for(iIn=0; iIn<nUri; iIn++) nByte += (zUri[iIn]=='&'); + zFile = sqlite3_malloc(nByte); + if( !zFile ) return SQLITE_NOMEM; + + /* Discard the scheme and authority segments of the URI. */ + if( zUri[5]=='/' && zUri[6]=='/' ){ + iIn = 7; + while( zUri[iIn] && zUri[iIn]!='/' ) iIn++; + + if( iIn!=7 && (iIn!=16 || memcmp("localhost", &zUri[7], 9)) ){ + *pzErrMsg = sqlite3_mprintf("invalid uri authority: %.*s", + iIn-7, &zUri[7]); + rc = SQLITE_ERROR; + goto parse_uri_out; + } + }else{ + iIn = 5; + } + + /* Copy the filename and any query parameters into the zFile buffer. + ** Decode %HH escape codes along the way. + ** + ** Within this loop, variable eState may be set to 0, 1 or 2, depending + ** on the parsing context. As follows: + ** + ** 0: Parsing file-name. + ** 1: Parsing name section of a name=value query parameter. + ** 2: Parsing value section of a name=value query parameter. + */ + eState = 0; + while( (c = zUri[iIn])!=0 && c!='#' ){ + iIn++; + if( c=='%' + && sqlite3Isxdigit(zUri[iIn]) + && sqlite3Isxdigit(zUri[iIn+1]) + ){ + int octet = (sqlite3HexToInt(zUri[iIn++]) << 4); + octet += sqlite3HexToInt(zUri[iIn++]); + + assert( octet>=0 && octet<256 ); + if( octet==0 ){ + /* This branch is taken when "%00" appears within the URI. In this + ** case we ignore all text in the remainder of the path, name or + ** value currently being parsed. So ignore the current character + ** and skip to the next "?", "=" or "&", as appropriate. */ + while( (c = zUri[iIn])!=0 && c!='#' + && (eState!=0 || c!='?') + && (eState!=1 || (c!='=' && c!='&')) + && (eState!=2 || c!='&') + ){ + iIn++; + } + continue; + } + c = octet; + }else if( eState==1 && (c=='&' || c=='=') ){ + if( zFile[iOut-1]==0 ){ + /* An empty option name. Ignore this option altogether. */ + while( zUri[iIn] && zUri[iIn]!='#' && zUri[iIn-1]!='&' ) iIn++; + continue; + } + if( c=='&' ){ + zFile[iOut++] = '\0'; + }else{ + eState = 2; + } + c = 0; + }else if( (eState==0 && c=='?') || (eState==2 && c=='&') ){ + c = 0; + eState = 1; + } + zFile[iOut++] = c; + } + if( eState==1 ) zFile[iOut++] = '\0'; + zFile[iOut++] = '\0'; + zFile[iOut++] = '\0'; + + /* Check if there were any options specified that should be interpreted + ** here. Options that are interpreted here include "vfs" and those that + ** correspond to flags that may be passed to the sqlite3_open_v2() + ** method. */ + zOpt = &zFile[sqlite3Strlen30(zFile)+1]; + while( zOpt[0] ){ + int nOpt = sqlite3Strlen30(zOpt); + char *zVal = &zOpt[nOpt+1]; + int nVal = sqlite3Strlen30(zVal); + + if( nOpt==3 && memcmp("vfs", zOpt, 3)==0 ){ + zVfs = zVal; + }else{ + struct OpenMode { + const char *z; + int mode; + } *aMode = 0; + char *zModeType = 0; + int mask = 0; + int limit = 0; + + if( nOpt==5 && memcmp("cache", zOpt, 5)==0 ){ + static struct OpenMode aCacheMode[] = { + { "shared", SQLITE_OPEN_SHAREDCACHE }, + { "private", SQLITE_OPEN_PRIVATECACHE }, + { 0, 0 } + }; + + mask = SQLITE_OPEN_SHAREDCACHE|SQLITE_OPEN_PRIVATECACHE; + aMode = aCacheMode; + limit = mask; + zModeType = "cache"; + } + if( nOpt==4 && memcmp("mode", zOpt, 4)==0 ){ + static struct OpenMode aOpenMode[] = { + { "ro", SQLITE_OPEN_READONLY }, + { "rw", SQLITE_OPEN_READWRITE }, + { "rwc", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE }, + { 0, 0 } + }; + + mask = SQLITE_OPEN_READONLY|SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE; + aMode = aOpenMode; + limit = mask & flags; + zModeType = "access"; + } + + if( aMode ){ + int i; + int mode = 0; + for(i=0; aMode[i].z; i++){ + const char *z = aMode[i].z; + if( nVal==sqlite3Strlen30(z) && 0==memcmp(zVal, z, nVal) ){ + mode = aMode[i].mode; + break; + } + } + if( mode==0 ){ + *pzErrMsg = sqlite3_mprintf("no such %s mode: %s", zModeType, zVal); + rc = SQLITE_ERROR; + goto parse_uri_out; + } + if( mode>limit ){ + *pzErrMsg = sqlite3_mprintf("%s mode not allowed: %s", + zModeType, zVal); + rc = SQLITE_PERM; + goto parse_uri_out; + } + flags = (flags & ~mask) | mode; + } + } + + zOpt = &zVal[nVal+1]; + } + + }else{ + zFile = sqlite3_malloc(nUri+2); + if( !zFile ) return SQLITE_NOMEM; + memcpy(zFile, zUri, nUri); + zFile[nUri] = '\0'; + zFile[nUri+1] = '\0'; + } + + *ppVfs = sqlite3_vfs_find(zVfs); + if( *ppVfs==0 ){ + *pzErrMsg = sqlite3_mprintf("no such vfs: %s", zVfs); + rc = SQLITE_ERROR; + } + parse_uri_out: + if( rc!=SQLITE_OK ){ + sqlite3_free(zFile); + zFile = 0; + } + *pFlags = flags; + *pzFile = zFile; + return rc; +} + + +/* ** This routine does the work of opening a database on behalf of ** sqlite3_open() and sqlite3_open16(). The database filename "zFilename" ** is UTF-8 encoded. @@ -108913,12 +109946,14 @@ SQLITE_API int sqlite3_limit(sqlite3 *db, int limitId, int newLimit){ static int openDatabase( const char *zFilename, /* Database filename UTF-8 encoded */ sqlite3 **ppDb, /* OUT: Returned database handle */ - unsigned flags, /* Operational flags */ + unsigned int flags, /* Operational flags */ const char *zVfs /* Name of the VFS to use */ ){ - sqlite3 *db; - int rc; - int isThreadsafe; + sqlite3 *db; /* Store allocated handle here */ + int rc; /* Return code */ + int isThreadsafe; /* True for threadsafe connections */ + char *zOpen = 0; /* Filename argument to pass to BtreeOpen() */ + char *zErrMsg = 0; /* Error message from sqlite3ParseUri() */ *ppDb = 0; #ifndef SQLITE_OMIT_AUTOINIT @@ -108942,7 +109977,7 @@ static int openDatabase( testcase( (1<<(flags&7))==0x02 ); /* READONLY */ testcase( (1<<(flags&7))==0x04 ); /* READWRITE */ testcase( (1<<(flags&7))==0x40 ); /* READWRITE | CREATE */ - if( ((1<<(flags&7)) & 0x46)==0 ) return SQLITE_MISUSE; + if( ((1<<(flags&7)) & 0x46)==0 ) return SQLITE_MISUSE_BKPT; if( sqlite3GlobalConfig.bCoreMutex==0 ){ isThreadsafe = 0; @@ -109023,13 +110058,6 @@ static int openDatabase( sqlite3HashInit(&db->aModule); #endif - db->pVfs = sqlite3_vfs_find(zVfs); - if( !db->pVfs ){ - rc = SQLITE_ERROR; - sqlite3Error(db, rc, "no such vfs: %s", zVfs); - goto opendb_out; - } - /* Add the default collation sequence BINARY. BINARY works for both UTF-8 ** and UTF-16, so add a version for each to avoid any unnecessary ** conversions. The only error that can occur here is a malloc() failure. @@ -109052,9 +110080,18 @@ static int openDatabase( createCollation(db, "NOCASE", SQLITE_UTF8, SQLITE_COLL_NOCASE, 0, nocaseCollatingFunc, 0); - /* Open the backend database driver */ + /* Parse the filename/URI argument. */ db->openFlags = flags; - rc = sqlite3BtreeOpen(zFilename, db, &db->aDb[0].pBt, 0, + rc = sqlite3ParseUri(zVfs, zFilename, &flags, &db->pVfs, &zOpen, &zErrMsg); + if( rc!=SQLITE_OK ){ + if( rc==SQLITE_NOMEM ) db->mallocFailed = 1; + sqlite3Error(db, rc, zErrMsg ? "%s" : 0, zErrMsg); + sqlite3_free(zErrMsg); + goto opendb_out; + } + + /* Open the backend database driver */ + rc = sqlite3BtreeOpen(db->pVfs, zOpen, db, &db->aDb[0].pBt, 0, flags | SQLITE_OPEN_MAIN_DB); if( rc!=SQLITE_OK ){ if( rc==SQLITE_IOERR_NOMEM ){ @@ -109147,6 +110184,7 @@ static int openDatabase( sqlite3_wal_autocheckpoint(db, SQLITE_DEFAULT_WAL_AUTOCHECKPOINT); opendb_out: + sqlite3_free(zOpen); if( db ){ assert( db->mutex!=0 || isThreadsafe==0 || sqlite3GlobalConfig.bFullMutex==0 ); sqlite3_mutex_leave(db->mutex); @@ -109178,7 +110216,7 @@ SQLITE_API int sqlite3_open_v2( int flags, /* Flags */ const char *zVfs /* Name of VFS module to use */ ){ - return openDatabase(filename, ppDb, flags, zVfs); + return openDatabase(filename, ppDb, (unsigned int)flags, zVfs); } #ifndef SQLITE_OMIT_UTF16 @@ -109783,12 +110821,45 @@ SQLITE_API int sqlite3_test_control(int op, ...){ break; } + /* sqlite3_test_control(SQLITE_TESTCTRL_LOCALTIME_FAULT, int onoff); + ** + ** If parameter onoff is non-zero, configure the wrappers so that all + ** subsequent calls to localtime() and variants fail. If onoff is zero, + ** undo this setting. + */ + case SQLITE_TESTCTRL_LOCALTIME_FAULT: { + sqlite3GlobalConfig.bLocaltimeFault = va_arg(ap, int); + break; + } + } va_end(ap); #endif /* SQLITE_OMIT_BUILTIN_TEST */ return rc; } +/* +** This is a utility routine, useful to VFS implementations, that checks +** to see if a database file was a URI that contained a specific query +** parameter, and if so obtains the value of the query parameter. +** +** The zFilename argument is the filename pointer passed into the xOpen() +** method of a VFS implementation. The zParam argument is the name of the +** query parameter we seek. This routine returns the value of the zParam +** parameter if it exists. If the parameter does not exist, this routine +** returns a NULL pointer. +*/ +SQLITE_API const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam){ + zFilename += sqlite3Strlen30(zFilename) + 1; + while( zFilename[0] ){ + int x = strcmp(zFilename, zParam); + zFilename += sqlite3Strlen30(zFilename) + 1; + if( x==0 ) return zFilename; + zFilename += sqlite3Strlen30(zFilename) + 1; + } + return 0; +} + /************** End of main.c ************************************************/ /************** Begin file notify.c ******************************************/ /* @@ -110418,12 +111489,6 @@ SQLITE_PRIVATE void sqlite3ConnectionClosed(sqlite3 *db){ ** into a single segment. */ -#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3) - -#if defined(SQLITE_ENABLE_FTS3) && !defined(SQLITE_CORE) -# define SQLITE_CORE 1 -#endif - /************** Include fts3Int.h in the middle of fts3.c ********************/ /************** Begin file fts3Int.h *****************************************/ /* @@ -110439,7 +111504,6 @@ SQLITE_PRIVATE void sqlite3ConnectionClosed(sqlite3 *db){ ****************************************************************************** ** */ - #ifndef _FTSINT_H #define _FTSINT_H @@ -110447,6 +111511,16 @@ SQLITE_PRIVATE void sqlite3ConnectionClosed(sqlite3 *db){ # define NDEBUG 1 #endif +/* +** FTS4 is really an extension for FTS3. It is enabled using the +** SQLITE_ENABLE_FTS3 macro. But to avoid confusion we also all +** the SQLITE_ENABLE_FTS4 macro to serve as an alisse for SQLITE_ENABLE_FTS3. +*/ +#if defined(SQLITE_ENABLE_FTS4) && !defined(SQLITE_ENABLE_FTS3) +# define SQLITE_ENABLE_FTS3 +#endif + +#ifdef SQLITE_ENABLE_FTS3 /************** Include fts3_tokenizer.h in the middle of fts3Int.h **********/ /************** Begin file fts3_tokenizer.h **********************************/ /* @@ -110745,6 +111819,11 @@ SQLITE_PRIVATE Fts3HashElem *sqlite3Fts3HashFindElem(const Fts3Hash *, const voi */ #define SizeofArray(X) ((int)(sizeof(X)/sizeof(X[0]))) + +#ifndef MIN +# define MIN(x,y) ((x)<(y)?(x):(y)) +#endif + /* ** Maximum length of a varint encoded integer. The varint format is different ** from that used by SQLite, so the maximum length is 10, not 9. @@ -110752,6 +111831,24 @@ SQLITE_PRIVATE Fts3HashElem *sqlite3Fts3HashFindElem(const Fts3Hash *, const voi #define FTS3_VARINT_MAX 10 /* +** FTS4 virtual tables may maintain multiple indexes - one index of all terms +** in the document set and zero or more prefix indexes. All indexes are stored +** as one or more b+-trees in the %_segments and %_segdir tables. +** +** It is possible to determine which index a b+-tree belongs to based on the +** value stored in the "%_segdir.level" column. Given this value L, the index +** that the b+-tree belongs to is (L<<10). In other words, all b+-trees with +** level values between 0 and 1023 (inclusive) belong to index 0, all levels +** between 1024 and 2047 to index 1, and so on. +** +** It is considered impossible for an index to use more than 1024 levels. In +** theory though this may happen, but only after at least +** (FTS3_MERGE_COUNT^1024) separate flushes of the pending-terms tables. +*/ +#define FTS3_SEGDIR_MAXLEVEL 1024 +#define FTS3_SEGDIR_MAXLEVEL_STR "1024" + +/* ** The testcase() macro is only used by the amalgamation. If undefined, ** make it a no-op. */ @@ -110790,22 +111887,43 @@ typedef unsigned char u8; /* 1-byte (or larger) unsigned integer */ typedef short int i16; /* 2-byte (or larger) signed integer */ typedef unsigned int u32; /* 4-byte unsigned integer */ typedef sqlite3_uint64 u64; /* 8-byte unsigned integer */ + /* ** Macro used to suppress compiler warnings for unused parameters. */ #define UNUSED_PARAMETER(x) (void)(x) + +/* +** Activate assert() only if SQLITE_TEST is enabled. +*/ +#if !defined(NDEBUG) && !defined(SQLITE_DEBUG) +# define NDEBUG 1 #endif +/* +** The TESTONLY macro is used to enclose variable declarations or +** other bits of code that are needed to support the arguments +** within testcase() and assert() macros. +*/ +#if defined(SQLITE_DEBUG) || defined(SQLITE_COVERAGE_TEST) +# define TESTONLY(X) X +#else +# define TESTONLY(X) +#endif + +#endif /* SQLITE_AMALGAMATION */ + typedef struct Fts3Table Fts3Table; typedef struct Fts3Cursor Fts3Cursor; typedef struct Fts3Expr Fts3Expr; typedef struct Fts3Phrase Fts3Phrase; typedef struct Fts3PhraseToken Fts3PhraseToken; +typedef struct Fts3Doclist Fts3Doclist; typedef struct Fts3SegFilter Fts3SegFilter; typedef struct Fts3DeferredToken Fts3DeferredToken; typedef struct Fts3SegReader Fts3SegReader; -typedef struct Fts3SegReaderCursor Fts3SegReaderCursor; +typedef struct Fts3MultiSegReader Fts3MultiSegReader; /* ** A connection to a fulltext index is an instance of the following @@ -110826,7 +111944,7 @@ struct Fts3Table { /* Precompiled statements used by the implementation. Each of these ** statements is run and reset within a single virtual table API call. */ - sqlite3_stmt *aStmt[24]; + sqlite3_stmt *aStmt[27]; char *zReadExprlist; char *zWriteExprlist; @@ -110834,21 +111952,43 @@ struct Fts3Table { int nNodeSize; /* Soft limit for node size */ u8 bHasStat; /* True if %_stat table exists */ u8 bHasDocsize; /* True if %_docsize table exists */ + u8 bDescIdx; /* True if doclists are in reverse order */ int nPgsz; /* Page size for host database */ char *zSegmentsTbl; /* Name of %_segments table */ sqlite3_blob *pSegments; /* Blob handle open on %_segments table */ - /* The following hash table is used to buffer pending index updates during + /* TODO: Fix the first paragraph of this comment. + ** + ** The following hash table is used to buffer pending index updates during ** transactions. Variable nPendingData estimates the memory size of the ** pending data, including hash table overhead, but not malloc overhead. ** When nPendingData exceeds nMaxPendingData, the buffer is flushed ** automatically. Variable iPrevDocid is the docid of the most recently ** inserted record. + ** + ** A single FTS4 table may have multiple full-text indexes. For each index + ** there is an entry in the aIndex[] array. Index 0 is an index of all the + ** terms that appear in the document set. Each subsequent index in aIndex[] + ** is an index of prefixes of a specific length. + */ + int nIndex; /* Size of aIndex[] */ + struct Fts3Index { + int nPrefix; /* Prefix length (0 for main terms index) */ + Fts3Hash hPending; /* Pending terms table for this index */ + } *aIndex; + int nMaxPendingData; /* Max pending data before flush to disk */ + int nPendingData; /* Current bytes of pending data */ + sqlite_int64 iPrevDocid; /* Docid of most recently inserted document */ + +#if defined(SQLITE_DEBUG) + /* State variables used for validating that the transaction control + ** methods of the virtual table are called at appropriate times. These + ** values do not contribution to the FTS computation; they are used for + ** verifying the SQLite core. */ - int nMaxPendingData; - int nPendingData; - sqlite_int64 iPrevDocid; - Fts3Hash pendingTerms; + int inTransaction; /* True after xBegin but before xCommit/xRollback */ + int mxSavepoint; /* Largest valid xSavepoint integer */ +#endif }; /* @@ -110869,8 +112009,10 @@ struct Fts3Cursor { char *pNextId; /* Pointer into the body of aDoclist */ char *aDoclist; /* List of docids for full-text queries */ int nDoclist; /* Size of buffer at aDoclist */ + u8 bDesc; /* True to sort in descending order */ int eEvalmode; /* An FTS3_EVAL_XX constant */ int nRowAvg; /* Average size of database rows, in pages */ + sqlite3_int64 nDoc; /* Documents in table */ int isMatchinfoNeeded; /* True when aMatchinfo[] needs filling in */ u32 *aMatchinfo; /* Information about most recent match */ @@ -110901,47 +112043,70 @@ struct Fts3Cursor { #define FTS3_DOCID_SEARCH 1 /* Lookup by rowid on %_content table */ #define FTS3_FULLTEXT_SEARCH 2 /* Full-text index search */ + +struct Fts3Doclist { + char *aAll; /* Array containing doclist (or NULL) */ + int nAll; /* Size of a[] in bytes */ + char *pNextDocid; /* Pointer to next docid */ + + sqlite3_int64 iDocid; /* Current docid (if pList!=0) */ + int bFreeList; /* True if pList should be sqlite3_free()d */ + char *pList; /* Pointer to position list following iDocid */ + int nList; /* Length of position list */ +} doclist; + /* ** A "phrase" is a sequence of one or more tokens that must match in ** sequence. A single token is the base case and the most common case. ** For a sequence of tokens contained in double-quotes (i.e. "one two three") ** nToken will be the number of tokens in the string. -** -** The nDocMatch and nMatch variables contain data that may be used by the -** matchinfo() function. They are populated when the full-text index is -** queried for hits on the phrase. If one or more tokens in the phrase -** are deferred, the nDocMatch and nMatch variables are populated based -** on the assumption that the */ struct Fts3PhraseToken { char *z; /* Text of the token */ int n; /* Number of bytes in buffer z */ int isPrefix; /* True if token ends with a "*" character */ - int bFulltext; /* True if full-text index was used */ - Fts3SegReaderCursor *pSegcsr; /* Segment-reader for this token */ + + /* Variables above this point are populated when the expression is + ** parsed (by code in fts3_expr.c). Below this point the variables are + ** used when evaluating the expression. */ Fts3DeferredToken *pDeferred; /* Deferred token object for this token */ + Fts3MultiSegReader *pSegcsr; /* Segment-reader for this token */ }; struct Fts3Phrase { - /* Variables populated by fts3_expr.c when parsing a MATCH expression */ + /* Cache of doclist for this phrase. */ + Fts3Doclist doclist; + int bIncr; /* True if doclist is loaded incrementally */ + int iDoclistToken; + + /* Variables below this point are populated by fts3_expr.c when parsing + ** a MATCH expression. Everything above is part of the evaluation phase. + */ int nToken; /* Number of tokens in the phrase */ int iColumn; /* Index of column this phrase must match */ - int isNot; /* Phrase prefixed by unary not (-) operator */ Fts3PhraseToken aToken[1]; /* One entry for each token in the phrase */ }; /* ** A tree of these objects forms the RHS of a MATCH operator. ** -** If Fts3Expr.eType is either FTSQUERY_NEAR or FTSQUERY_PHRASE and isLoaded -** is true, then aDoclist points to a malloced buffer, size nDoclist bytes, -** containing the results of the NEAR or phrase query in FTS3 doclist -** format. As usual, the initial "Length" field found in doclists stored -** on disk is omitted from this buffer. +** If Fts3Expr.eType is FTSQUERY_PHRASE and isLoaded is true, then aDoclist +** points to a malloced buffer, size nDoclist bytes, containing the results +** of this phrase query in FTS3 doclist format. As usual, the initial +** "Length" field found in doclists stored on disk is omitted from this +** buffer. +** +** Variable aMI is used only for FTSQUERY_NEAR nodes to store the global +** matchinfo data. If it is not NULL, it points to an array of size nCol*3, +** where nCol is the number of columns in the queried FTS table. The array +** is populated as follows: ** -** Variable pCurrent always points to the start of a docid field within -** aDoclist. Since the doclist is usually scanned in docid order, this can -** be used to accelerate seeking to the required docid within the doclist. +** aMI[iCol*3 + 0] = Undefined +** aMI[iCol*3 + 1] = Number of occurrences +** aMI[iCol*3 + 2] = Number of rows containing at least one instance +** +** The aMI array is allocated using sqlite3_malloc(). It should be freed +** when the expression node is. */ struct Fts3Expr { int eType; /* One of the FTSQUERY_XXX values defined below */ @@ -110951,12 +112116,13 @@ struct Fts3Expr { Fts3Expr *pRight; /* Right operand */ Fts3Phrase *pPhrase; /* Valid if eType==FTSQUERY_PHRASE */ - int isLoaded; /* True if aDoclist/nDoclist are initialized. */ - char *aDoclist; /* Buffer containing doclist */ - int nDoclist; /* Size of aDoclist in bytes */ + /* The following are used by the fts3_eval.c module. */ + sqlite3_int64 iDocid; /* Current docid */ + u8 bEof; /* True this expression is at EOF already */ + u8 bStart; /* True if iDocid is valid */ + u8 bDeferred; /* True if this expression is entirely deferred */ - sqlite3_int64 iCurrent; - char *pCurrent; + u32 *aMI; }; /* @@ -110984,12 +112150,12 @@ SQLITE_PRIVATE void sqlite3Fts3PendingTermsClear(Fts3Table *); SQLITE_PRIVATE int sqlite3Fts3Optimize(Fts3Table *); SQLITE_PRIVATE int sqlite3Fts3SegReaderNew(int, sqlite3_int64, sqlite3_int64, sqlite3_int64, const char *, int, Fts3SegReader**); -SQLITE_PRIVATE int sqlite3Fts3SegReaderPending(Fts3Table*,const char*,int,int,Fts3SegReader**); +SQLITE_PRIVATE int sqlite3Fts3SegReaderPending( + Fts3Table*,int,const char*,int,int,Fts3SegReader**); SQLITE_PRIVATE void sqlite3Fts3SegReaderFree(Fts3SegReader *); -SQLITE_PRIVATE int sqlite3Fts3SegReaderCost(Fts3Cursor *, Fts3SegReader *, int *); -SQLITE_PRIVATE int sqlite3Fts3AllSegdirs(Fts3Table*, int, sqlite3_stmt **); +SQLITE_PRIVATE int sqlite3Fts3AllSegdirs(Fts3Table*, int, int, sqlite3_stmt **); SQLITE_PRIVATE int sqlite3Fts3ReadLock(Fts3Table *); -SQLITE_PRIVATE int sqlite3Fts3ReadBlock(Fts3Table*, sqlite3_int64, char **, int*); +SQLITE_PRIVATE int sqlite3Fts3ReadBlock(Fts3Table*, sqlite3_int64, char **, int*, int*); SQLITE_PRIVATE int sqlite3Fts3SelectDoctotal(Fts3Table *, sqlite3_stmt **); SQLITE_PRIVATE int sqlite3Fts3SelectDocsize(Fts3Table *, sqlite3_int64, sqlite3_stmt **); @@ -110998,17 +112164,18 @@ SQLITE_PRIVATE void sqlite3Fts3FreeDeferredTokens(Fts3Cursor *); SQLITE_PRIVATE int sqlite3Fts3DeferToken(Fts3Cursor *, Fts3PhraseToken *, int); SQLITE_PRIVATE int sqlite3Fts3CacheDeferredDoclists(Fts3Cursor *); SQLITE_PRIVATE void sqlite3Fts3FreeDeferredDoclists(Fts3Cursor *); -SQLITE_PRIVATE char *sqlite3Fts3DeferredDoclist(Fts3DeferredToken *, int *); SQLITE_PRIVATE void sqlite3Fts3SegmentsClose(Fts3Table *); -#define FTS3_SEGCURSOR_PENDING -1 -#define FTS3_SEGCURSOR_ALL -2 +/* Special values interpreted by sqlite3SegReaderCursor() */ +#define FTS3_SEGCURSOR_PENDING -1 +#define FTS3_SEGCURSOR_ALL -2 + +SQLITE_PRIVATE int sqlite3Fts3SegReaderStart(Fts3Table*, Fts3MultiSegReader*, Fts3SegFilter*); +SQLITE_PRIVATE int sqlite3Fts3SegReaderStep(Fts3Table *, Fts3MultiSegReader *); +SQLITE_PRIVATE void sqlite3Fts3SegReaderFinish(Fts3MultiSegReader *); -SQLITE_PRIVATE int sqlite3Fts3SegReaderStart(Fts3Table*, Fts3SegReaderCursor*, Fts3SegFilter*); -SQLITE_PRIVATE int sqlite3Fts3SegReaderStep(Fts3Table *, Fts3SegReaderCursor *); -SQLITE_PRIVATE void sqlite3Fts3SegReaderFinish(Fts3SegReaderCursor *); SQLITE_PRIVATE int sqlite3Fts3SegReaderCursor( - Fts3Table *, int, const char *, int, int, int, Fts3SegReaderCursor *); + Fts3Table *, int, int, const char *, int, int, int, Fts3MultiSegReader *); /* Flags allowed as part of the 4th argument to SegmentReaderIterate() */ #define FTS3_SEGMENT_REQUIRE_POS 0x00000001 @@ -111025,7 +112192,7 @@ struct Fts3SegFilter { int flags; }; -struct Fts3SegReaderCursor { +struct Fts3MultiSegReader { /* Used internally by sqlite3Fts3SegReaderXXX() calls */ Fts3SegReader **apSegment; /* Array of Fts3SegReader objects */ int nSegment; /* Size of apSegment array */ @@ -111034,8 +112201,12 @@ struct Fts3SegReaderCursor { char *aBuffer; /* Buffer to merge doclists in */ int nBuffer; /* Allocated size of aBuffer[] in bytes */ - /* Cost of running this iterator. Used by fts3.c only. */ - int nCost; + int iColFilter; /* If >=0, filter for this column */ + int bRestart; + + /* Used by fts3.c only. */ + int nCost; /* Cost of running iterator */ + int bLookup; /* True if a lookup of a single entry. */ /* Output values. Valid only after Fts3SegReaderStep() returns SQLITE_ROW. */ char *zTerm; /* Pointer to term buffer */ @@ -111050,11 +112221,9 @@ SQLITE_PRIVATE int sqlite3Fts3GetVarint(const char *, sqlite_int64 *); SQLITE_PRIVATE int sqlite3Fts3GetVarint32(const char *, int *); SQLITE_PRIVATE int sqlite3Fts3VarintLen(sqlite3_uint64); SQLITE_PRIVATE void sqlite3Fts3Dequote(char *); +SQLITE_PRIVATE void sqlite3Fts3DoclistPrev(int,char*,int,char**,sqlite3_int64*,int*,u8*); -SQLITE_PRIVATE char *sqlite3Fts3FindPositions(Fts3Expr *, sqlite3_int64, int); -SQLITE_PRIVATE int sqlite3Fts3ExprLoadDoclist(Fts3Cursor *, Fts3Expr *); -SQLITE_PRIVATE int sqlite3Fts3ExprLoadFtDoclist(Fts3Cursor *, Fts3Expr *, char **, int *); -SQLITE_PRIVATE int sqlite3Fts3ExprNearTrim(Fts3Expr *, Fts3Expr *, int); +SQLITE_PRIVATE int sqlite3Fts3EvalPhraseStats(Fts3Cursor *, Fts3Expr *, u32 *); /* fts3_tokenizer.c */ SQLITE_PRIVATE const char *sqlite3Fts3NextToken(const char *, int *); @@ -111078,15 +112247,45 @@ SQLITE_PRIVATE int sqlite3Fts3ExprParse(sqlite3_tokenizer *, SQLITE_PRIVATE void sqlite3Fts3ExprFree(Fts3Expr *); #ifdef SQLITE_TEST SQLITE_PRIVATE int sqlite3Fts3ExprInitTestInterface(sqlite3 *db); +SQLITE_PRIVATE int sqlite3Fts3InitTerm(sqlite3 *db); #endif /* fts3_aux.c */ SQLITE_PRIVATE int sqlite3Fts3InitAux(sqlite3 *db); +SQLITE_PRIVATE int sqlite3Fts3TermSegReaderCursor( + Fts3Cursor *pCsr, /* Virtual table cursor handle */ + const char *zTerm, /* Term to query for */ + int nTerm, /* Size of zTerm in bytes */ + int isPrefix, /* True for a prefix search */ + Fts3MultiSegReader **ppSegcsr /* OUT: Allocated seg-reader cursor */ +); + +SQLITE_PRIVATE void sqlite3Fts3EvalPhraseCleanup(Fts3Phrase *); + +SQLITE_PRIVATE int sqlite3Fts3EvalStart(Fts3Cursor *, Fts3Expr *, int); +SQLITE_PRIVATE int sqlite3Fts3EvalNext(Fts3Cursor *pCsr); + +SQLITE_PRIVATE int sqlite3Fts3MsrIncrStart( + Fts3Table*, Fts3MultiSegReader*, int, const char*, int); +SQLITE_PRIVATE int sqlite3Fts3MsrIncrNext( + Fts3Table *, Fts3MultiSegReader *, sqlite3_int64 *, char **, int *); +SQLITE_PRIVATE char *sqlite3Fts3EvalPhrasePoslist(Fts3Cursor *, Fts3Expr *, int iCol); +SQLITE_PRIVATE int sqlite3Fts3MsrOvfl(Fts3Cursor *, Fts3MultiSegReader *, int *); +SQLITE_PRIVATE int sqlite3Fts3MsrIncrRestart(Fts3MultiSegReader *pCsr); + +SQLITE_PRIVATE int sqlite3Fts3DeferredTokenList(Fts3DeferredToken *, char **, int *); + +#endif /* SQLITE_ENABLE_FTS3 */ #endif /* _FTSINT_H */ /************** End of fts3Int.h *********************************************/ /************** Continuing where we left off in fts3.c ***********************/ +#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3) + +#if defined(SQLITE_ENABLE_FTS3) && !defined(SQLITE_CORE) +# define SQLITE_CORE 1 +#endif #ifndef SQLITE_CORE @@ -111200,17 +112399,31 @@ static void fts3GetDeltaVarint(char **pp, sqlite3_int64 *pVal){ } /* -** As long as *pp has not reached its end (pEnd), then do the same -** as fts3GetDeltaVarint(): read a single varint and add it to *pVal. -** But if we have reached the end of the varint, just set *pp=0 and -** leave *pVal unchanged. +** When this function is called, *pp points to the first byte following a +** varint that is part of a doclist (or position-list, or any other list +** of varints). This function moves *pp to point to the start of that varint, +** and sets *pVal by the varint value. +** +** Argument pStart points to the first byte of the doclist that the +** varint is part of. */ -static void fts3GetDeltaVarint2(char **pp, char *pEnd, sqlite3_int64 *pVal){ - if( *pp>=pEnd ){ - *pp = 0; - }else{ - fts3GetDeltaVarint(pp, pVal); - } +static void fts3GetReverseVarint( + char **pp, + char *pStart, + sqlite3_int64 *pVal +){ + sqlite3_int64 iVal; + char *p = *pp; + + /* Pointer p now points at the first byte past the varint we are + ** interested in. So, unless the doclist is corrupt, the 0x80 bit is + ** clear on character p[-1]. */ + for(p = (*pp)-2; p>=pStart && *p&0x80; p--); + p++; + *pp = p; + + sqlite3Fts3GetVarint(p, &iVal); + *pVal = iVal; } /* @@ -111304,6 +112517,8 @@ static void fts3DeclareVtab(int *pRc, Fts3Table *p){ char *zSql; /* SQL statement passed to declare_vtab() */ char *zCols; /* List of user defined columns */ + sqlite3_vtab_config(p->db, SQLITE_VTAB_CONSTRAINT_SUPPORT, 1); + /* Create a list of user columns for the virtual table */ zCols = sqlite3_mprintf("%Q, ", p->azColumn[0]); for(i=1; zCols && i<p->nColumn; i++){ @@ -111409,6 +112624,9 @@ static void fts3DatabasePageSize(int *pRc, Fts3Table *p){ sqlite3_step(pStmt); p->nPgsz = sqlite3_column_int(pStmt, 0); rc = sqlite3_finalize(pStmt); + }else if( rc==SQLITE_AUTH ){ + p->nPgsz = 1024; + rc = SQLITE_OK; } } assert( p->nPgsz>0 || rc!=SQLITE_OK ); @@ -111582,6 +112800,58 @@ static char *fts3WriteExprList(Fts3Table *p, const char *zFunc, int *pRc){ return zRet; } +static int fts3GobbleInt(const char **pp, int *pnOut){ + const char *p = *pp; + int nInt = 0; + for(p=*pp; p[0]>='0' && p[0]<='9'; p++){ + nInt = nInt * 10 + (p[0] - '0'); + } + if( p==*pp ) return SQLITE_ERROR; + *pnOut = nInt; + *pp = p; + return SQLITE_OK; +} + + +static int fts3PrefixParameter( + const char *zParam, /* ABC in prefix=ABC parameter to parse */ + int *pnIndex, /* OUT: size of *apIndex[] array */ + struct Fts3Index **apIndex, /* OUT: Array of indexes for this table */ + struct Fts3Index **apFree /* OUT: Free this with sqlite3_free() */ +){ + struct Fts3Index *aIndex; + int nIndex = 1; + + if( zParam && zParam[0] ){ + const char *p; + nIndex++; + for(p=zParam; *p; p++){ + if( *p==',' ) nIndex++; + } + } + + aIndex = sqlite3_malloc(sizeof(struct Fts3Index) * nIndex); + *apIndex = *apFree = aIndex; + *pnIndex = nIndex; + if( !aIndex ){ + return SQLITE_NOMEM; + } + + memset(aIndex, 0, sizeof(struct Fts3Index) * nIndex); + if( zParam ){ + const char *p = zParam; + int i; + for(i=1; i<nIndex; i++){ + int nPrefix; + if( fts3GobbleInt(&p, &nPrefix) ) return SQLITE_ERROR; + aIndex[i].nPrefix = nPrefix; + p++; + } + } + + return SQLITE_OK; +} + /* ** This function is the implementation of both the xConnect and xCreate ** methods of the FTS3 virtual table. @@ -111614,12 +112884,19 @@ static int fts3InitVtab( int nDb; /* Bytes required to hold database name */ int nName; /* Bytes required to hold table name */ int isFts4 = (argv[0][3]=='4'); /* True for FTS4, false for FTS3 */ - int bNoDocsize = 0; /* True to omit %_docsize table */ const char **aCol; /* Array of column names */ sqlite3_tokenizer *pTokenizer = 0; /* Tokenizer for this table */ - char *zCompress = 0; - char *zUncompress = 0; + int nIndex; /* Size of aIndex[] array */ + struct Fts3Index *aIndex; /* Array of indexes for this table */ + struct Fts3Index *aFree = 0; /* Free this before returning */ + + /* The results of parsing supported FTS4 key=value options: */ + int bNoDocsize = 0; /* True to omit %_docsize table */ + int bDescIdx = 0; /* True to store descending indexes */ + char *zPrefix = 0; /* Prefix parameter value (or NULL) */ + char *zCompress = 0; /* compress=? parameter (or NULL) */ + char *zUncompress = 0; /* uncompress=? parameter (or NULL) */ assert( strlen(argv[0])==4 ); assert( (sqlite3_strnicmp(argv[0], "fts4", 4)==0 && isFts4) @@ -111660,28 +112937,72 @@ static int fts3InitVtab( /* Check if it is an FTS4 special argument. */ else if( isFts4 && fts3IsSpecialColumn(z, &nKey, &zVal) ){ + struct Fts4Option { + const char *zOpt; + int nOpt; + char **pzVar; + } aFts4Opt[] = { + { "matchinfo", 9, 0 }, /* 0 -> MATCHINFO */ + { "prefix", 6, 0 }, /* 1 -> PREFIX */ + { "compress", 8, 0 }, /* 2 -> COMPRESS */ + { "uncompress", 10, 0 }, /* 3 -> UNCOMPRESS */ + { "order", 5, 0 } /* 4 -> ORDER */ + }; + + int iOpt; if( !zVal ){ rc = SQLITE_NOMEM; - goto fts3_init_out; - } - if( nKey==9 && 0==sqlite3_strnicmp(z, "matchinfo", 9) ){ - if( strlen(zVal)==4 && 0==sqlite3_strnicmp(zVal, "fts3", 4) ){ - bNoDocsize = 1; - }else{ - *pzErr = sqlite3_mprintf("unrecognized matchinfo: %s", zVal); + }else{ + for(iOpt=0; iOpt<SizeofArray(aFts4Opt); iOpt++){ + struct Fts4Option *pOp = &aFts4Opt[iOpt]; + if( nKey==pOp->nOpt && !sqlite3_strnicmp(z, pOp->zOpt, pOp->nOpt) ){ + break; + } + } + if( iOpt==SizeofArray(aFts4Opt) ){ + *pzErr = sqlite3_mprintf("unrecognized parameter: %s", z); rc = SQLITE_ERROR; + }else{ + switch( iOpt ){ + case 0: /* MATCHINFO */ + if( strlen(zVal)!=4 || sqlite3_strnicmp(zVal, "fts3", 4) ){ + *pzErr = sqlite3_mprintf("unrecognized matchinfo: %s", zVal); + rc = SQLITE_ERROR; + } + bNoDocsize = 1; + break; + + case 1: /* PREFIX */ + sqlite3_free(zPrefix); + zPrefix = zVal; + zVal = 0; + break; + + case 2: /* COMPRESS */ + sqlite3_free(zCompress); + zCompress = zVal; + zVal = 0; + break; + + case 3: /* UNCOMPRESS */ + sqlite3_free(zUncompress); + zUncompress = zVal; + zVal = 0; + break; + + case 4: /* ORDER */ + if( (strlen(zVal)!=3 || sqlite3_strnicmp(zVal, "asc", 3)) + && (strlen(zVal)!=4 || sqlite3_strnicmp(zVal, "desc", 3)) + ){ + *pzErr = sqlite3_mprintf("unrecognized order: %s", zVal); + rc = SQLITE_ERROR; + } + bDescIdx = (zVal[0]=='d' || zVal[0]=='D'); + break; + } } - }else if( nKey==8 && 0==sqlite3_strnicmp(z, "compress", 8) ){ - zCompress = zVal; - zVal = 0; - }else if( nKey==10 && 0==sqlite3_strnicmp(z, "uncompress", 10) ){ - zUncompress = zVal; - zVal = 0; - }else{ - *pzErr = sqlite3_mprintf("unrecognized parameter: %s", z); - rc = SQLITE_ERROR; + sqlite3_free(zVal); } - sqlite3_free(zVal); } /* Otherwise, the argument is a column name. */ @@ -111705,10 +113026,17 @@ static int fts3InitVtab( } assert( pTokenizer ); + rc = fts3PrefixParameter(zPrefix, &nIndex, &aIndex, &aFree); + if( rc==SQLITE_ERROR ){ + assert( zPrefix ); + *pzErr = sqlite3_mprintf("error parsing prefix parameter: %s", zPrefix); + } + if( rc!=SQLITE_OK ) goto fts3_init_out; /* Allocate and populate the Fts3Table structure. */ - nByte = sizeof(Fts3Table) + /* Fts3Table */ + nByte = sizeof(Fts3Table) + /* Fts3Table */ nCol * sizeof(char *) + /* azColumn */ + nIndex * sizeof(struct Fts3Index) + /* aIndex */ nName + /* zName */ nDb + /* zDb */ nString; /* Space for azColumn strings */ @@ -111723,14 +113051,22 @@ static int fts3InitVtab( p->nPendingData = 0; p->azColumn = (char **)&p[1]; p->pTokenizer = pTokenizer; - p->nNodeSize = 1000; p->nMaxPendingData = FTS3_MAX_PENDING_DATA; p->bHasDocsize = (isFts4 && bNoDocsize==0); p->bHasStat = isFts4; - fts3HashInit(&p->pendingTerms, FTS3_HASH_STRING, 1); + p->bDescIdx = bDescIdx; + TESTONLY( p->inTransaction = -1 ); + TESTONLY( p->mxSavepoint = -1 ); + + p->aIndex = (struct Fts3Index *)&p->azColumn[nCol]; + memcpy(p->aIndex, aIndex, sizeof(struct Fts3Index) * nIndex); + p->nIndex = nIndex; + for(i=0; i<nIndex; i++){ + fts3HashInit(&p->aIndex[i].hPending, FTS3_HASH_STRING, 1); + } /* Fill in the zName and zDb fields of the vtab structure. */ - zCsr = (char *)&p->azColumn[nCol]; + zCsr = (char *)&p->aIndex[nIndex]; p->zName = zCsr; memcpy(zCsr, argv[2], nName); zCsr += nName; @@ -111741,7 +113077,7 @@ static int fts3InitVtab( /* Fill in the azColumn array */ for(iCol=0; iCol<nCol; iCol++){ char *z; - int n; + int n = 0; z = (char *)sqlite3Fts3NextToken(aCol[iCol], &n); memcpy(zCsr, z, n); zCsr[n] = '\0'; @@ -111768,15 +113104,16 @@ static int fts3InitVtab( } /* Figure out the page-size for the database. This is required in order to - ** estimate the cost of loading large doclists from the database (see - ** function sqlite3Fts3SegReaderCost() for details). - */ + ** estimate the cost of loading large doclists from the database. */ fts3DatabasePageSize(&rc, p); + p->nNodeSize = p->nPgsz-35; /* Declare the table schema to SQLite. */ fts3DeclareVtab(&rc, p); fts3_init_out: + sqlite3_free(zPrefix); + sqlite3_free(aFree); sqlite3_free(zCompress); sqlite3_free(zUncompress); sqlite3_free((void *)aCol); @@ -111787,6 +113124,7 @@ fts3_init_out: pTokenizer->pModule->xDestroy(pTokenizer); } }else{ + assert( p->pSegments==0 ); *ppVTab = &p->base; } return rc; @@ -111872,6 +113210,23 @@ static int fts3BestIndexMethod(sqlite3_vtab *pVTab, sqlite3_index_info *pInfo){ pInfo->aConstraintUsage[iCons].argvIndex = 1; pInfo->aConstraintUsage[iCons].omit = 1; } + + /* Regardless of the strategy selected, FTS can deliver rows in rowid (or + ** docid) order. Both ascending and descending are possible. + */ + if( pInfo->nOrderBy==1 ){ + struct sqlite3_index_orderby *pOrder = &pInfo->aOrderBy[0]; + if( pOrder->iColumn<0 || pOrder->iColumn==p->nColumn+1 ){ + if( pOrder->desc ){ + pInfo->idxStr = "DESC"; + }else{ + pInfo->idxStr = "ASC"; + } + pInfo->orderByConsumed = 1; + } + } + + assert( p->pSegments==0 ); return SQLITE_OK; } @@ -111907,6 +113262,7 @@ static int fts3CloseMethod(sqlite3_vtab_cursor *pCursor){ sqlite3Fts3FreeDeferredTokens(pCsr); sqlite3_free(pCsr->aDoclist); sqlite3_free(pCsr->aMatchinfo); + assert( ((Fts3Table *)pCsr->base.pVtab)->pSegments==0 ); sqlite3_free(pCsr); return SQLITE_OK; } @@ -111918,8 +113274,8 @@ static int fts3CloseMethod(sqlite3_vtab_cursor *pCursor){ */ static int fts3CursorSeek(sqlite3_context *pContext, Fts3Cursor *pCsr){ if( pCsr->isRequireSeek ){ - pCsr->isRequireSeek = 0; sqlite3_bind_int64(pCsr->pStmt, 1, pCsr->iPrevId); + pCsr->isRequireSeek = 0; if( SQLITE_ROW==sqlite3_step(pCsr->pStmt) ){ return SQLITE_OK; }else{ @@ -111929,7 +113285,7 @@ static int fts3CursorSeek(sqlite3_context *pContext, Fts3Cursor *pCsr){ ** table is missing a row that is present in the full-text index. ** The data structures are corrupt. */ - rc = SQLITE_CORRUPT; + rc = SQLITE_CORRUPT_VTAB; } pCsr->isEof = 1; if( pContext ){ @@ -111989,7 +113345,7 @@ static int fts3ScanInteriorNode( zCsr += sqlite3Fts3GetVarint(zCsr, &iChild); zCsr += sqlite3Fts3GetVarint(zCsr, &iChild); if( zCsr>zEnd ){ - return SQLITE_CORRUPT; + return SQLITE_CORRUPT_VTAB; } while( zCsr<zEnd && (piFirst || piLast) ){ @@ -112007,7 +113363,7 @@ static int fts3ScanInteriorNode( zCsr += sqlite3Fts3GetVarint32(zCsr, &nSuffix); if( nPrefix<0 || nSuffix<0 || &zCsr[nSuffix]>zEnd ){ - rc = SQLITE_CORRUPT; + rc = SQLITE_CORRUPT_VTAB; goto finish_scan; } if( nPrefix+nSuffix>nAlloc ){ @@ -112100,7 +113456,7 @@ static int fts3SelectLeaf( int nBlob; /* Size of zBlob in bytes */ if( piLeaf && piLeaf2 && (*piLeaf!=*piLeaf2) ){ - rc = sqlite3Fts3ReadBlock(p, *piLeaf, &zBlob, &nBlob); + rc = sqlite3Fts3ReadBlock(p, *piLeaf, &zBlob, &nBlob, 0); if( rc==SQLITE_OK ){ rc = fts3SelectLeaf(p, zTerm, nTerm, zBlob, nBlob, piLeaf, 0); } @@ -112110,7 +113466,7 @@ static int fts3SelectLeaf( } if( rc==SQLITE_OK ){ - rc = sqlite3Fts3ReadBlock(p, piLeaf ? *piLeaf : *piLeaf2, &zBlob, &nBlob); + rc = sqlite3Fts3ReadBlock(p, piLeaf?*piLeaf:*piLeaf2, &zBlob, &nBlob, 0); } if( rc==SQLITE_OK ){ rc = fts3SelectLeaf(p, zTerm, nTerm, zBlob, nBlob, piLeaf, piLeaf2); @@ -112486,7 +113842,19 @@ static int fts3PoslistPhraseMerge( } /* -** Merge two position-lists as required by the NEAR operator. +** Merge two position-lists as required by the NEAR operator. The argument +** position lists correspond to the left and right phrases of an expression +** like: +** +** "phrase 1" NEAR "phrase number 2" +** +** Position list *pp1 corresponds to the left-hand side of the NEAR +** expression and *pp2 to the right. As usual, the indexes in the position +** lists are the offsets of the last token in each phrase (tokens "1" and "2" +** in the example above). +** +** The output position list - written to *pp - is a copy of *pp2 with those +** entries that are not sufficiently NEAR entries in *pp1 removed. */ static int fts3PoslistNearMerge( char **pp, /* Output buffer */ @@ -112499,226 +113867,181 @@ static int fts3PoslistNearMerge( char *p1 = *pp1; char *p2 = *pp2; - if( !pp ){ - if( fts3PoslistPhraseMerge(0, nRight, 0, 0, pp1, pp2) ) return 1; - *pp1 = p1; - *pp2 = p2; - return fts3PoslistPhraseMerge(0, nLeft, 0, 0, pp2, pp1); + char *pTmp1 = aTmp; + char *pTmp2; + char *aTmp2; + int res = 1; + + fts3PoslistPhraseMerge(&pTmp1, nRight, 0, 0, pp1, pp2); + aTmp2 = pTmp2 = pTmp1; + *pp1 = p1; + *pp2 = p2; + fts3PoslistPhraseMerge(&pTmp2, nLeft, 1, 0, pp2, pp1); + if( pTmp1!=aTmp && pTmp2!=aTmp2 ){ + fts3PoslistMerge(pp, &aTmp, &aTmp2); + }else if( pTmp1!=aTmp ){ + fts3PoslistCopy(pp, &aTmp); + }else if( pTmp2!=aTmp2 ){ + fts3PoslistCopy(pp, &aTmp2); + }else{ + res = 0; + } + + return res; +} + +/* +** A pointer to an instance of this structure is used as the context +** argument to sqlite3Fts3SegReaderIterate() +*/ +typedef struct TermSelect TermSelect; +struct TermSelect { + int isReqPos; + char *aaOutput[16]; /* Malloc'd output buffer */ + int anOutput[16]; /* Size of output in bytes */ +}; + + +static void fts3GetDeltaVarint3( + char **pp, + char *pEnd, + int bDescIdx, + sqlite3_int64 *pVal +){ + if( *pp>=pEnd ){ + *pp = 0; }else{ - char *pTmp1 = aTmp; - char *pTmp2; - char *aTmp2; - int res = 1; - - fts3PoslistPhraseMerge(&pTmp1, nRight, 0, 0, pp1, pp2); - aTmp2 = pTmp2 = pTmp1; - *pp1 = p1; - *pp2 = p2; - fts3PoslistPhraseMerge(&pTmp2, nLeft, 1, 0, pp2, pp1); - if( pTmp1!=aTmp && pTmp2!=aTmp2 ){ - fts3PoslistMerge(pp, &aTmp, &aTmp2); - }else if( pTmp1!=aTmp ){ - fts3PoslistCopy(pp, &aTmp); - }else if( pTmp2!=aTmp2 ){ - fts3PoslistCopy(pp, &aTmp2); + sqlite3_int64 iVal; + *pp += sqlite3Fts3GetVarint(*pp, &iVal); + if( bDescIdx ){ + *pVal -= iVal; }else{ - res = 0; + *pVal += iVal; } + } +} - return res; +static void fts3PutDeltaVarint3( + char **pp, /* IN/OUT: Output pointer */ + int bDescIdx, /* True for descending docids */ + sqlite3_int64 *piPrev, /* IN/OUT: Previous value written to list */ + int *pbFirst, /* IN/OUT: True after first int written */ + sqlite3_int64 iVal /* Write this value to the list */ +){ + sqlite3_int64 iWrite; + if( bDescIdx==0 || *pbFirst==0 ){ + iWrite = iVal - *piPrev; + }else{ + iWrite = *piPrev - iVal; } + assert( *pbFirst || *piPrev==0 ); + assert( *pbFirst==0 || iWrite>0 ); + *pp += sqlite3Fts3PutVarint(*pp, iWrite); + *piPrev = iVal; + *pbFirst = 1; } -/* -** Values that may be used as the first parameter to fts3DoclistMerge(). -*/ -#define MERGE_NOT 2 /* D + D -> D */ -#define MERGE_AND 3 /* D + D -> D */ -#define MERGE_OR 4 /* D + D -> D */ -#define MERGE_POS_OR 5 /* P + P -> P */ -#define MERGE_PHRASE 6 /* P + P -> D */ -#define MERGE_POS_PHRASE 7 /* P + P -> P */ -#define MERGE_NEAR 8 /* P + P -> D */ -#define MERGE_POS_NEAR 9 /* P + P -> P */ +#define COMPARE_DOCID(i1, i2) ((bDescIdx?-1:1) * (i1-i2)) -/* -** Merge the two doclists passed in buffer a1 (size n1 bytes) and a2 -** (size n2 bytes). The output is written to pre-allocated buffer aBuffer, -** which is guaranteed to be large enough to hold the results. The number -** of bytes written to aBuffer is stored in *pnBuffer before returning. -** -** If successful, SQLITE_OK is returned. Otherwise, if a malloc error -** occurs while allocating a temporary buffer as part of the merge operation, -** SQLITE_NOMEM is returned. -*/ -static int fts3DoclistMerge( - int mergetype, /* One of the MERGE_XXX constants */ - int nParam1, /* Used by MERGE_NEAR and MERGE_POS_NEAR */ - int nParam2, /* Used by MERGE_NEAR and MERGE_POS_NEAR */ - char *aBuffer, /* Pre-allocated output buffer */ - int *pnBuffer, /* OUT: Bytes written to aBuffer */ - char *a1, /* Buffer containing first doclist */ - int n1, /* Size of buffer a1 */ - char *a2, /* Buffer containing second doclist */ - int n2, /* Size of buffer a2 */ - int *pnDoc /* OUT: Number of docids in output */ +static int fts3DoclistOrMerge( + int bDescIdx, /* True if arguments are desc */ + char *a1, int n1, /* First doclist */ + char *a2, int n2, /* Second doclist */ + char **paOut, int *pnOut /* OUT: Malloc'd doclist */ ){ sqlite3_int64 i1 = 0; sqlite3_int64 i2 = 0; sqlite3_int64 iPrev = 0; - - char *p = aBuffer; - char *p1 = a1; - char *p2 = a2; char *pEnd1 = &a1[n1]; char *pEnd2 = &a2[n2]; - int nDoc = 0; - - assert( mergetype==MERGE_OR || mergetype==MERGE_POS_OR - || mergetype==MERGE_AND || mergetype==MERGE_NOT - || mergetype==MERGE_PHRASE || mergetype==MERGE_POS_PHRASE - || mergetype==MERGE_NEAR || mergetype==MERGE_POS_NEAR - ); - - if( !aBuffer ){ - *pnBuffer = 0; - return SQLITE_NOMEM; - } - - /* Read the first docid from each doclist */ - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - - switch( mergetype ){ - case MERGE_OR: - case MERGE_POS_OR: - while( p1 || p2 ){ - if( p2 && p1 && i1==i2 ){ - fts3PutDeltaVarint(&p, &iPrev, i1); - if( mergetype==MERGE_POS_OR ) fts3PoslistMerge(&p, &p1, &p2); - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - }else if( !p2 || (p1 && i1<i2) ){ - fts3PutDeltaVarint(&p, &iPrev, i1); - if( mergetype==MERGE_POS_OR ) fts3PoslistCopy(&p, &p1); - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - }else{ - fts3PutDeltaVarint(&p, &iPrev, i2); - if( mergetype==MERGE_POS_OR ) fts3PoslistCopy(&p, &p2); - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - } - } - break; - - case MERGE_AND: - while( p1 && p2 ){ - if( i1==i2 ){ - fts3PutDeltaVarint(&p, &iPrev, i1); - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - nDoc++; - }else if( i1<i2 ){ - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - }else{ - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - } - } - break; - - case MERGE_NOT: - while( p1 ){ - if( p2 && i1==i2 ){ - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - }else if( !p2 || i1<i2 ){ - fts3PutDeltaVarint(&p, &iPrev, i1); - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - }else{ - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - } - } - break; + char *p1 = a1; + char *p2 = a2; + char *p; + char *aOut; + int bFirstOut = 0; - case MERGE_POS_PHRASE: - case MERGE_PHRASE: { - char **ppPos = (mergetype==MERGE_PHRASE ? 0 : &p); - while( p1 && p2 ){ - if( i1==i2 ){ - char *pSave = p; - sqlite3_int64 iPrevSave = iPrev; - fts3PutDeltaVarint(&p, &iPrev, i1); - if( 0==fts3PoslistPhraseMerge(ppPos, nParam1, 0, 1, &p1, &p2) ){ - p = pSave; - iPrev = iPrevSave; - }else{ - nDoc++; - } - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - }else if( i1<i2 ){ - fts3PoslistCopy(0, &p1); - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - }else{ - fts3PoslistCopy(0, &p2); - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - } - } - break; + *paOut = 0; + *pnOut = 0; + aOut = sqlite3_malloc(n1+n2); + if( !aOut ) return SQLITE_NOMEM; + + p = aOut; + fts3GetDeltaVarint3(&p1, pEnd1, 0, &i1); + fts3GetDeltaVarint3(&p2, pEnd2, 0, &i2); + while( p1 || p2 ){ + sqlite3_int64 iDiff = COMPARE_DOCID(i1, i2); + + if( p2 && p1 && iDiff==0 ){ + fts3PutDeltaVarint3(&p, bDescIdx, &iPrev, &bFirstOut, i1); + fts3PoslistMerge(&p, &p1, &p2); + fts3GetDeltaVarint3(&p1, pEnd1, bDescIdx, &i1); + fts3GetDeltaVarint3(&p2, pEnd2, bDescIdx, &i2); + }else if( !p2 || (p1 && iDiff<0) ){ + fts3PutDeltaVarint3(&p, bDescIdx, &iPrev, &bFirstOut, i1); + fts3PoslistCopy(&p, &p1); + fts3GetDeltaVarint3(&p1, pEnd1, bDescIdx, &i1); + }else{ + fts3PutDeltaVarint3(&p, bDescIdx, &iPrev, &bFirstOut, i2); + fts3PoslistCopy(&p, &p2); + fts3GetDeltaVarint3(&p2, pEnd2, bDescIdx, &i2); } + } - default: assert( mergetype==MERGE_POS_NEAR || mergetype==MERGE_NEAR ); { - char *aTmp = 0; - char **ppPos = 0; - - if( mergetype==MERGE_POS_NEAR ){ - ppPos = &p; - aTmp = sqlite3_malloc(2*(n1+n2+1)); - if( !aTmp ){ - return SQLITE_NOMEM; - } - } - - while( p1 && p2 ){ - if( i1==i2 ){ - char *pSave = p; - sqlite3_int64 iPrevSave = iPrev; - fts3PutDeltaVarint(&p, &iPrev, i1); + *paOut = aOut; + *pnOut = (p-aOut); + return SQLITE_OK; +} - if( !fts3PoslistNearMerge(ppPos, aTmp, nParam1, nParam2, &p1, &p2) ){ - iPrev = iPrevSave; - p = pSave; - } +static void fts3DoclistPhraseMerge( + int bDescIdx, /* True if arguments are desc */ + int nDist, /* Distance from left to right (1=adjacent) */ + char *aLeft, int nLeft, /* Left doclist */ + char *aRight, int *pnRight /* IN/OUT: Right/output doclist */ +){ + sqlite3_int64 i1 = 0; + sqlite3_int64 i2 = 0; + sqlite3_int64 iPrev = 0; + char *pEnd1 = &aLeft[nLeft]; + char *pEnd2 = &aRight[*pnRight]; + char *p1 = aLeft; + char *p2 = aRight; + char *p; + int bFirstOut = 0; + char *aOut = aRight; + + assert( nDist>0 ); + + p = aOut; + fts3GetDeltaVarint3(&p1, pEnd1, 0, &i1); + fts3GetDeltaVarint3(&p2, pEnd2, 0, &i2); + + while( p1 && p2 ){ + sqlite3_int64 iDiff = COMPARE_DOCID(i1, i2); + if( iDiff==0 ){ + char *pSave = p; + sqlite3_int64 iPrevSave = iPrev; + int bFirstOutSave = bFirstOut; - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - }else if( i1<i2 ){ - fts3PoslistCopy(0, &p1); - fts3GetDeltaVarint2(&p1, pEnd1, &i1); - }else{ - fts3PoslistCopy(0, &p2); - fts3GetDeltaVarint2(&p2, pEnd2, &i2); - } - } - sqlite3_free(aTmp); - break; + fts3PutDeltaVarint3(&p, bDescIdx, &iPrev, &bFirstOut, i1); + if( 0==fts3PoslistPhraseMerge(&p, nDist, 0, 1, &p1, &p2) ){ + p = pSave; + iPrev = iPrevSave; + bFirstOut = bFirstOutSave; + } + fts3GetDeltaVarint3(&p1, pEnd1, bDescIdx, &i1); + fts3GetDeltaVarint3(&p2, pEnd2, bDescIdx, &i2); + }else if( iDiff<0 ){ + fts3PoslistCopy(0, &p1); + fts3GetDeltaVarint3(&p1, pEnd1, bDescIdx, &i1); + }else{ + fts3PoslistCopy(0, &p2); + fts3GetDeltaVarint3(&p2, pEnd2, bDescIdx, &i2); } } - if( pnDoc ) *pnDoc = nDoc; - *pnBuffer = (int)(p-aBuffer); - return SQLITE_OK; + *pnRight = p - aOut; } -/* -** A pointer to an instance of this structure is used as the context -** argument to sqlite3Fts3SegReaderIterate() -*/ -typedef struct TermSelect TermSelect; -struct TermSelect { - int isReqPos; - char *aaOutput[16]; /* Malloc'd output buffer */ - int anOutput[16]; /* Size of output in bytes */ -}; /* ** Merge all doclists in the TermSelect.aaOutput[] array into a single @@ -112729,8 +114052,7 @@ struct TermSelect { ** the responsibility of the caller to free any doclists left in the ** TermSelect.aaOutput[] array. */ -static int fts3TermSelectMerge(TermSelect *pTS){ - int mergetype = (pTS->isReqPos ? MERGE_POS_OR : MERGE_OR); +static int fts3TermSelectMerge(Fts3Table *p, TermSelect *pTS){ char *aOut = 0; int nOut = 0; int i; @@ -112745,15 +114067,17 @@ static int fts3TermSelectMerge(TermSelect *pTS){ nOut = pTS->anOutput[i]; pTS->aaOutput[i] = 0; }else{ - int nNew = nOut + pTS->anOutput[i]; - char *aNew = sqlite3_malloc(nNew); - if( !aNew ){ + int nNew; + char *aNew; + + int rc = fts3DoclistOrMerge(p->bDescIdx, + pTS->aaOutput[i], pTS->anOutput[i], aOut, nOut, &aNew, &nNew + ); + if( rc!=SQLITE_OK ){ sqlite3_free(aOut); - return SQLITE_NOMEM; + return rc; } - fts3DoclistMerge(mergetype, 0, 0, - aNew, &nNew, pTS->aaOutput[i], pTS->anOutput[i], aOut, nOut, 0 - ); + sqlite3_free(pTS->aaOutput[i]); sqlite3_free(aOut); pTS->aaOutput[i] = 0; @@ -112789,9 +114113,7 @@ static int fts3TermSelectCb( if( pTS->aaOutput[0]==0 ){ /* If this is the first term selected, copy the doclist to the output - ** buffer using memcpy(). TODO: Add a way to transfer control of the - ** aDoclist buffer from the caller so as to avoid the memcpy(). - */ + ** buffer using memcpy(). */ pTS->aaOutput[0] = sqlite3_malloc(nDoclist); pTS->anOutput[0] = nDoclist; if( pTS->aaOutput[0] ){ @@ -112800,126 +114122,100 @@ static int fts3TermSelectCb( return SQLITE_NOMEM; } }else{ - int mergetype = (pTS->isReqPos ? MERGE_POS_OR : MERGE_OR); char *aMerge = aDoclist; int nMerge = nDoclist; int iOut; for(iOut=0; iOut<SizeofArray(pTS->aaOutput); iOut++){ - char *aNew; - int nNew; if( pTS->aaOutput[iOut]==0 ){ assert( iOut>0 ); pTS->aaOutput[iOut] = aMerge; pTS->anOutput[iOut] = nMerge; break; - } + }else{ + char *aNew; + int nNew; - nNew = nMerge + pTS->anOutput[iOut]; - aNew = sqlite3_malloc(nNew); - if( !aNew ){ - if( aMerge!=aDoclist ){ - sqlite3_free(aMerge); + int rc = fts3DoclistOrMerge(p->bDescIdx, aMerge, nMerge, + pTS->aaOutput[iOut], pTS->anOutput[iOut], &aNew, &nNew + ); + if( rc!=SQLITE_OK ){ + if( aMerge!=aDoclist ) sqlite3_free(aMerge); + return rc; } - return SQLITE_NOMEM; - } - fts3DoclistMerge(mergetype, 0, 0, aNew, &nNew, - pTS->aaOutput[iOut], pTS->anOutput[iOut], aMerge, nMerge, 0 - ); - if( iOut>0 ) sqlite3_free(aMerge); - sqlite3_free(pTS->aaOutput[iOut]); - pTS->aaOutput[iOut] = 0; - - aMerge = aNew; - nMerge = nNew; - if( (iOut+1)==SizeofArray(pTS->aaOutput) ){ - pTS->aaOutput[iOut] = aMerge; - pTS->anOutput[iOut] = nMerge; + if( aMerge!=aDoclist ) sqlite3_free(aMerge); + sqlite3_free(pTS->aaOutput[iOut]); + pTS->aaOutput[iOut] = 0; + + aMerge = aNew; + nMerge = nNew; + if( (iOut+1)==SizeofArray(pTS->aaOutput) ){ + pTS->aaOutput[iOut] = aMerge; + pTS->anOutput[iOut] = nMerge; + } } } } return SQLITE_OK; } -static int fts3DeferredTermSelect( - Fts3DeferredToken *pToken, /* Phrase token */ - int isTermPos, /* True to include positions */ - int *pnOut, /* OUT: Size of list */ - char **ppOut /* OUT: Body of list */ -){ - char *aSource; - int nSource; - - aSource = sqlite3Fts3DeferredDoclist(pToken, &nSource); - if( !aSource ){ - *pnOut = 0; - *ppOut = 0; - }else if( isTermPos ){ - *ppOut = sqlite3_malloc(nSource); - if( !*ppOut ) return SQLITE_NOMEM; - memcpy(*ppOut, aSource, nSource); - *pnOut = nSource; - }else{ - sqlite3_int64 docid; - *pnOut = sqlite3Fts3GetVarint(aSource, &docid); - *ppOut = sqlite3_malloc(*pnOut); - if( !*ppOut ) return SQLITE_NOMEM; - sqlite3Fts3PutVarint(*ppOut, docid); +/* +** Append SegReader object pNew to the end of the pCsr->apSegment[] array. +*/ +static int fts3SegReaderCursorAppend( + Fts3MultiSegReader *pCsr, + Fts3SegReader *pNew +){ + if( (pCsr->nSegment%16)==0 ){ + Fts3SegReader **apNew; + int nByte = (pCsr->nSegment + 16)*sizeof(Fts3SegReader*); + apNew = (Fts3SegReader **)sqlite3_realloc(pCsr->apSegment, nByte); + if( !apNew ){ + sqlite3Fts3SegReaderFree(pNew); + return SQLITE_NOMEM; + } + pCsr->apSegment = apNew; } - + pCsr->apSegment[pCsr->nSegment++] = pNew; return SQLITE_OK; } -SQLITE_PRIVATE int sqlite3Fts3SegReaderCursor( +static int fts3SegReaderCursor( Fts3Table *p, /* FTS3 table handle */ + int iIndex, /* Index to search (from 0 to p->nIndex-1) */ int iLevel, /* Level of segments to scan */ const char *zTerm, /* Term to query for */ int nTerm, /* Size of zTerm in bytes */ int isPrefix, /* True for a prefix search */ int isScan, /* True to scan from zTerm to EOF */ - Fts3SegReaderCursor *pCsr /* Cursor object to populate */ + Fts3MultiSegReader *pCsr /* Cursor object to populate */ ){ int rc = SQLITE_OK; int rc2; - int iAge = 0; sqlite3_stmt *pStmt = 0; - Fts3SegReader *pPending = 0; - - assert( iLevel==FTS3_SEGCURSOR_ALL - || iLevel==FTS3_SEGCURSOR_PENDING - || iLevel>=0 - ); - assert( FTS3_SEGCURSOR_PENDING<0 ); - assert( FTS3_SEGCURSOR_ALL<0 ); - assert( iLevel==FTS3_SEGCURSOR_ALL || (zTerm==0 && isPrefix==1) ); - assert( isPrefix==0 || isScan==0 ); - - memset(pCsr, 0, sizeof(Fts3SegReaderCursor)); - - /* If iLevel is less than 0, include a seg-reader for the pending-terms. */ - assert( isScan==0 || fts3HashCount(&p->pendingTerms)==0 ); - if( iLevel<0 && isScan==0 ){ - rc = sqlite3Fts3SegReaderPending(p, zTerm, nTerm, isPrefix, &pPending); - if( rc==SQLITE_OK && pPending ){ - int nByte = (sizeof(Fts3SegReader *) * 16); - pCsr->apSegment = (Fts3SegReader **)sqlite3_malloc(nByte); - if( pCsr->apSegment==0 ){ - rc = SQLITE_NOMEM; - }else{ - pCsr->apSegment[0] = pPending; - pCsr->nSegment = 1; - pPending = 0; - } + /* If iLevel is less than 0 and this is not a scan, include a seg-reader + ** for the pending-terms. If this is a scan, then this call must be being + ** made by an fts4aux module, not an FTS table. In this case calling + ** Fts3SegReaderPending might segfault, as the data structures used by + ** fts4aux are not completely populated. So it's easiest to filter these + ** calls out here. */ + if( iLevel<0 && p->aIndex ){ + Fts3SegReader *pSeg = 0; + rc = sqlite3Fts3SegReaderPending(p, iIndex, zTerm, nTerm, isPrefix, &pSeg); + if( rc==SQLITE_OK && pSeg ){ + rc = fts3SegReaderCursorAppend(pCsr, pSeg); } } if( iLevel!=FTS3_SEGCURSOR_PENDING ){ if( rc==SQLITE_OK ){ - rc = sqlite3Fts3AllSegdirs(p, iLevel, &pStmt); + rc = sqlite3Fts3AllSegdirs(p, iIndex, iLevel, &pStmt); } + while( rc==SQLITE_OK && SQLITE_ROW==(rc = sqlite3_step(pStmt)) ){ + Fts3SegReader *pSeg = 0; /* Read the values returned by the SELECT into local variables. */ sqlite3_int64 iStartBlock = sqlite3_column_int64(pStmt, 1); @@ -112928,18 +114224,6 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderCursor( int nRoot = sqlite3_column_bytes(pStmt, 4); char const *zRoot = sqlite3_column_blob(pStmt, 4); - /* If nSegment is a multiple of 16 the array needs to be extended. */ - if( (pCsr->nSegment%16)==0 ){ - Fts3SegReader **apNew; - int nByte = (pCsr->nSegment + 16)*sizeof(Fts3SegReader*); - apNew = (Fts3SegReader **)sqlite3_realloc(pCsr->apSegment, nByte); - if( !apNew ){ - rc = SQLITE_NOMEM; - goto finished; - } - pCsr->apSegment = apNew; - } - /* If zTerm is not NULL, and this segment is not stored entirely on its ** root node, the range of leaves scanned can be reduced. Do this. */ if( iStartBlock && zTerm ){ @@ -112949,53 +114233,117 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderCursor( if( isPrefix==0 && isScan==0 ) iLeavesEndBlock = iStartBlock; } - rc = sqlite3Fts3SegReaderNew(iAge, iStartBlock, iLeavesEndBlock, - iEndBlock, zRoot, nRoot, &pCsr->apSegment[pCsr->nSegment] + rc = sqlite3Fts3SegReaderNew(pCsr->nSegment+1, + iStartBlock, iLeavesEndBlock, iEndBlock, zRoot, nRoot, &pSeg ); if( rc!=SQLITE_OK ) goto finished; - pCsr->nSegment++; - iAge++; + rc = fts3SegReaderCursorAppend(pCsr, pSeg); } } finished: rc2 = sqlite3_reset(pStmt); if( rc==SQLITE_DONE ) rc = rc2; - sqlite3Fts3SegReaderFree(pPending); return rc; } +/* +** Set up a cursor object for iterating through a full-text index or a +** single level therein. +*/ +SQLITE_PRIVATE int sqlite3Fts3SegReaderCursor( + Fts3Table *p, /* FTS3 table handle */ + int iIndex, /* Index to search (from 0 to p->nIndex-1) */ + int iLevel, /* Level of segments to scan */ + const char *zTerm, /* Term to query for */ + int nTerm, /* Size of zTerm in bytes */ + int isPrefix, /* True for a prefix search */ + int isScan, /* True to scan from zTerm to EOF */ + Fts3MultiSegReader *pCsr /* Cursor object to populate */ +){ + assert( iIndex>=0 && iIndex<p->nIndex ); + assert( iLevel==FTS3_SEGCURSOR_ALL + || iLevel==FTS3_SEGCURSOR_PENDING + || iLevel>=0 + ); + assert( iLevel<FTS3_SEGDIR_MAXLEVEL ); + assert( FTS3_SEGCURSOR_ALL<0 && FTS3_SEGCURSOR_PENDING<0 ); + assert( isPrefix==0 || isScan==0 ); + + /* "isScan" is only set to true by the ft4aux module, an ordinary + ** full-text tables. */ + assert( isScan==0 || p->aIndex==0 ); + + memset(pCsr, 0, sizeof(Fts3MultiSegReader)); + + return fts3SegReaderCursor( + p, iIndex, iLevel, zTerm, nTerm, isPrefix, isScan, pCsr + ); +} + +static int fts3SegReaderCursorAddZero( + Fts3Table *p, + const char *zTerm, + int nTerm, + Fts3MultiSegReader *pCsr +){ + return fts3SegReaderCursor(p, 0, FTS3_SEGCURSOR_ALL, zTerm, nTerm, 0, 0,pCsr); +} + -static int fts3TermSegReaderCursor( +SQLITE_PRIVATE int sqlite3Fts3TermSegReaderCursor( Fts3Cursor *pCsr, /* Virtual table cursor handle */ const char *zTerm, /* Term to query for */ int nTerm, /* Size of zTerm in bytes */ int isPrefix, /* True for a prefix search */ - Fts3SegReaderCursor **ppSegcsr /* OUT: Allocated seg-reader cursor */ + Fts3MultiSegReader **ppSegcsr /* OUT: Allocated seg-reader cursor */ ){ - Fts3SegReaderCursor *pSegcsr; /* Object to allocate and return */ + Fts3MultiSegReader *pSegcsr; /* Object to allocate and return */ int rc = SQLITE_NOMEM; /* Return code */ - pSegcsr = sqlite3_malloc(sizeof(Fts3SegReaderCursor)); + pSegcsr = sqlite3_malloc(sizeof(Fts3MultiSegReader)); if( pSegcsr ){ - Fts3Table *p = (Fts3Table *)pCsr->base.pVtab; int i; - int nCost = 0; - rc = sqlite3Fts3SegReaderCursor( - p, FTS3_SEGCURSOR_ALL, zTerm, nTerm, isPrefix, 0, pSegcsr); - - for(i=0; rc==SQLITE_OK && i<pSegcsr->nSegment; i++){ - rc = sqlite3Fts3SegReaderCost(pCsr, pSegcsr->apSegment[i], &nCost); + int bFound = 0; /* True once an index has been found */ + Fts3Table *p = (Fts3Table *)pCsr->base.pVtab; + + if( isPrefix ){ + for(i=1; bFound==0 && i<p->nIndex; i++){ + if( p->aIndex[i].nPrefix==nTerm ){ + bFound = 1; + rc = sqlite3Fts3SegReaderCursor( + p, i, FTS3_SEGCURSOR_ALL, zTerm, nTerm, 0, 0, pSegcsr); + pSegcsr->bLookup = 1; + } + } + + for(i=1; bFound==0 && i<p->nIndex; i++){ + if( p->aIndex[i].nPrefix==nTerm+1 ){ + bFound = 1; + rc = sqlite3Fts3SegReaderCursor( + p, i, FTS3_SEGCURSOR_ALL, zTerm, nTerm, 1, 0, pSegcsr + ); + if( rc==SQLITE_OK ){ + rc = fts3SegReaderCursorAddZero(p, zTerm, nTerm, pSegcsr); + } + } + } + } + + if( bFound==0 ){ + rc = sqlite3Fts3SegReaderCursor( + p, 0, FTS3_SEGCURSOR_ALL, zTerm, nTerm, isPrefix, 0, pSegcsr + ); + pSegcsr->bLookup = !isPrefix; } - pSegcsr->nCost = nCost; } *ppSegcsr = pSegcsr; return rc; } -static void fts3SegReaderCursorFree(Fts3SegReaderCursor *pSegcsr){ +static void fts3SegReaderCursorFree(Fts3MultiSegReader *pSegcsr){ sqlite3Fts3SegReaderFinish(pSegcsr); sqlite3_free(pSegcsr); } @@ -113020,7 +114368,7 @@ static int fts3TermSelect( char **ppOut /* OUT: Malloced result buffer */ ){ int rc; /* Return code */ - Fts3SegReaderCursor *pSegcsr; /* Seg-reader cursor for this term */ + Fts3MultiSegReader *pSegcsr; /* Seg-reader cursor for this term */ TermSelect tsc; /* Context object for fts3TermSelectCb() */ Fts3SegFilter filter; /* Segment term filter configuration */ @@ -113046,7 +114394,7 @@ static int fts3TermSelect( } if( rc==SQLITE_OK ){ - rc = fts3TermSelectMerge(&tsc); + rc = fts3TermSelectMerge(p, &tsc); } if( rc==SQLITE_OK ){ *ppOut = tsc.aaOutput[0]; @@ -113097,660 +114445,6 @@ static int fts3DoclistCountDocids(int isPoslist, char *aList, int nList){ } /* -** Call sqlite3Fts3DeferToken() for each token in the expression pExpr. -*/ -static int fts3DeferExpression(Fts3Cursor *pCsr, Fts3Expr *pExpr){ - int rc = SQLITE_OK; - if( pExpr ){ - rc = fts3DeferExpression(pCsr, pExpr->pLeft); - if( rc==SQLITE_OK ){ - rc = fts3DeferExpression(pCsr, pExpr->pRight); - } - if( pExpr->eType==FTSQUERY_PHRASE ){ - int iCol = pExpr->pPhrase->iColumn; - int i; - for(i=0; rc==SQLITE_OK && i<pExpr->pPhrase->nToken; i++){ - Fts3PhraseToken *pToken = &pExpr->pPhrase->aToken[i]; - if( pToken->pDeferred==0 ){ - rc = sqlite3Fts3DeferToken(pCsr, pToken, iCol); - } - } - } - } - return rc; -} - -/* -** This function removes the position information from a doclist. When -** called, buffer aList (size *pnList bytes) contains a doclist that includes -** position information. This function removes the position information so -** that aList contains only docids, and adjusts *pnList to reflect the new -** (possibly reduced) size of the doclist. -*/ -static void fts3DoclistStripPositions( - char *aList, /* IN/OUT: Buffer containing doclist */ - int *pnList /* IN/OUT: Size of doclist in bytes */ -){ - if( aList ){ - char *aEnd = &aList[*pnList]; /* Pointer to one byte after EOF */ - char *p = aList; /* Input cursor */ - char *pOut = aList; /* Output cursor */ - - while( p<aEnd ){ - sqlite3_int64 delta; - p += sqlite3Fts3GetVarint(p, &delta); - fts3PoslistCopy(0, &p); - pOut += sqlite3Fts3PutVarint(pOut, delta); - } - - *pnList = (int)(pOut - aList); - } -} - -/* -** Return a DocList corresponding to the phrase *pPhrase. -** -** If this function returns SQLITE_OK, but *pnOut is set to a negative value, -** then no tokens in the phrase were looked up in the full-text index. This -** is only possible when this function is called from within xFilter(). The -** caller should assume that all documents match the phrase. The actual -** filtering will take place in xNext(). -*/ -static int fts3PhraseSelect( - Fts3Cursor *pCsr, /* Virtual table cursor handle */ - Fts3Phrase *pPhrase, /* Phrase to return a doclist for */ - int isReqPos, /* True if output should contain positions */ - char **paOut, /* OUT: Pointer to malloc'd result buffer */ - int *pnOut /* OUT: Size of buffer at *paOut */ -){ - char *pOut = 0; - int nOut = 0; - int rc = SQLITE_OK; - int ii; - int iCol = pPhrase->iColumn; - int isTermPos = (pPhrase->nToken>1 || isReqPos); - Fts3Table *p = (Fts3Table *)pCsr->base.pVtab; - int isFirst = 1; - - int iPrevTok = 0; - int nDoc = 0; - - /* If this is an xFilter() evaluation, create a segment-reader for each - ** phrase token. Or, if this is an xNext() or snippet/offsets/matchinfo - ** evaluation, only create segment-readers if there are no Fts3DeferredToken - ** objects attached to the phrase-tokens. - */ - for(ii=0; ii<pPhrase->nToken; ii++){ - Fts3PhraseToken *pTok = &pPhrase->aToken[ii]; - if( pTok->pSegcsr==0 ){ - if( (pCsr->eEvalmode==FTS3_EVAL_FILTER) - || (pCsr->eEvalmode==FTS3_EVAL_NEXT && pCsr->pDeferred==0) - || (pCsr->eEvalmode==FTS3_EVAL_MATCHINFO && pTok->bFulltext) - ){ - rc = fts3TermSegReaderCursor( - pCsr, pTok->z, pTok->n, pTok->isPrefix, &pTok->pSegcsr - ); - if( rc!=SQLITE_OK ) return rc; - } - } - } - - for(ii=0; ii<pPhrase->nToken; ii++){ - Fts3PhraseToken *pTok; /* Token to find doclist for */ - int iTok = 0; /* The token being queried this iteration */ - char *pList = 0; /* Pointer to token doclist */ - int nList = 0; /* Size of buffer at pList */ - - /* Select a token to process. If this is an xFilter() call, then tokens - ** are processed in order from least to most costly. Otherwise, tokens - ** are processed in the order in which they occur in the phrase. - */ - if( pCsr->eEvalmode==FTS3_EVAL_MATCHINFO ){ - assert( isReqPos ); - iTok = ii; - pTok = &pPhrase->aToken[iTok]; - if( pTok->bFulltext==0 ) continue; - }else if( pCsr->eEvalmode==FTS3_EVAL_NEXT || isReqPos ){ - iTok = ii; - pTok = &pPhrase->aToken[iTok]; - }else{ - int nMinCost = 0x7FFFFFFF; - int jj; - - /* Find the remaining token with the lowest cost. */ - for(jj=0; jj<pPhrase->nToken; jj++){ - Fts3SegReaderCursor *pSegcsr = pPhrase->aToken[jj].pSegcsr; - if( pSegcsr && pSegcsr->nCost<nMinCost ){ - iTok = jj; - nMinCost = pSegcsr->nCost; - } - } - pTok = &pPhrase->aToken[iTok]; - - /* This branch is taken if it is determined that loading the doclist - ** for the next token would require more IO than loading all documents - ** currently identified by doclist pOut/nOut. No further doclists will - ** be loaded from the full-text index for this phrase. - */ - if( nMinCost>nDoc && ii>0 ){ - rc = fts3DeferExpression(pCsr, pCsr->pExpr); - break; - } - } - - if( pCsr->eEvalmode==FTS3_EVAL_NEXT && pTok->pDeferred ){ - rc = fts3DeferredTermSelect(pTok->pDeferred, isTermPos, &nList, &pList); - }else{ - if( pTok->pSegcsr ){ - rc = fts3TermSelect(p, pTok, iCol, isTermPos, &nList, &pList); - } - pTok->bFulltext = 1; - } - assert( rc!=SQLITE_OK || pCsr->eEvalmode || pTok->pSegcsr==0 ); - if( rc!=SQLITE_OK ) break; - - if( isFirst ){ - pOut = pList; - nOut = nList; - if( pCsr->eEvalmode==FTS3_EVAL_FILTER && pPhrase->nToken>1 ){ - nDoc = fts3DoclistCountDocids(1, pOut, nOut); - } - isFirst = 0; - iPrevTok = iTok; - }else{ - /* Merge the new term list and the current output. */ - char *aLeft, *aRight; - int nLeft, nRight; - int nDist; - int mt; - - /* If this is the final token of the phrase, and positions were not - ** requested by the caller, use MERGE_PHRASE instead of POS_PHRASE. - ** This drops the position information from the output list. - */ - mt = MERGE_POS_PHRASE; - if( ii==pPhrase->nToken-1 && !isReqPos ) mt = MERGE_PHRASE; - - assert( iPrevTok!=iTok ); - if( iPrevTok<iTok ){ - aLeft = pOut; - nLeft = nOut; - aRight = pList; - nRight = nList; - nDist = iTok-iPrevTok; - iPrevTok = iTok; - }else{ - aRight = pOut; - nRight = nOut; - aLeft = pList; - nLeft = nList; - nDist = iPrevTok-iTok; - } - pOut = aRight; - fts3DoclistMerge( - mt, nDist, 0, pOut, &nOut, aLeft, nLeft, aRight, nRight, &nDoc - ); - sqlite3_free(aLeft); - } - assert( nOut==0 || pOut!=0 ); - } - - if( rc==SQLITE_OK ){ - if( ii!=pPhrase->nToken ){ - assert( pCsr->eEvalmode==FTS3_EVAL_FILTER && isReqPos==0 ); - fts3DoclistStripPositions(pOut, &nOut); - } - *paOut = pOut; - *pnOut = nOut; - }else{ - sqlite3_free(pOut); - } - return rc; -} - -/* -** This function merges two doclists according to the requirements of a -** NEAR operator. -** -** Both input doclists must include position information. The output doclist -** includes position information if the first argument to this function -** is MERGE_POS_NEAR, or does not if it is MERGE_NEAR. -*/ -static int fts3NearMerge( - int mergetype, /* MERGE_POS_NEAR or MERGE_NEAR */ - int nNear, /* Parameter to NEAR operator */ - int nTokenLeft, /* Number of tokens in LHS phrase arg */ - char *aLeft, /* Doclist for LHS (incl. positions) */ - int nLeft, /* Size of LHS doclist in bytes */ - int nTokenRight, /* As nTokenLeft */ - char *aRight, /* As aLeft */ - int nRight, /* As nRight */ - char **paOut, /* OUT: Results of merge (malloced) */ - int *pnOut /* OUT: Sized of output buffer */ -){ - char *aOut; /* Buffer to write output doclist to */ - int rc; /* Return code */ - - assert( mergetype==MERGE_POS_NEAR || MERGE_NEAR ); - - aOut = sqlite3_malloc(nLeft+nRight+1); - if( aOut==0 ){ - rc = SQLITE_NOMEM; - }else{ - rc = fts3DoclistMerge(mergetype, nNear+nTokenRight, nNear+nTokenLeft, - aOut, pnOut, aLeft, nLeft, aRight, nRight, 0 - ); - if( rc!=SQLITE_OK ){ - sqlite3_free(aOut); - aOut = 0; - } - } - - *paOut = aOut; - return rc; -} - -/* -** This function is used as part of the processing for the snippet() and -** offsets() functions. -** -** Both pLeft and pRight are expression nodes of type FTSQUERY_PHRASE. Both -** have their respective doclists (including position information) loaded -** in Fts3Expr.aDoclist/nDoclist. This function removes all entries from -** each doclist that are not within nNear tokens of a corresponding entry -** in the other doclist. -*/ -SQLITE_PRIVATE int sqlite3Fts3ExprNearTrim(Fts3Expr *pLeft, Fts3Expr *pRight, int nNear){ - int rc; /* Return code */ - - assert( pLeft->eType==FTSQUERY_PHRASE ); - assert( pRight->eType==FTSQUERY_PHRASE ); - assert( pLeft->isLoaded && pRight->isLoaded ); - - if( pLeft->aDoclist==0 || pRight->aDoclist==0 ){ - sqlite3_free(pLeft->aDoclist); - sqlite3_free(pRight->aDoclist); - pRight->aDoclist = 0; - pLeft->aDoclist = 0; - rc = SQLITE_OK; - }else{ - char *aOut; /* Buffer in which to assemble new doclist */ - int nOut; /* Size of buffer aOut in bytes */ - - rc = fts3NearMerge(MERGE_POS_NEAR, nNear, - pLeft->pPhrase->nToken, pLeft->aDoclist, pLeft->nDoclist, - pRight->pPhrase->nToken, pRight->aDoclist, pRight->nDoclist, - &aOut, &nOut - ); - if( rc!=SQLITE_OK ) return rc; - sqlite3_free(pRight->aDoclist); - pRight->aDoclist = aOut; - pRight->nDoclist = nOut; - - rc = fts3NearMerge(MERGE_POS_NEAR, nNear, - pRight->pPhrase->nToken, pRight->aDoclist, pRight->nDoclist, - pLeft->pPhrase->nToken, pLeft->aDoclist, pLeft->nDoclist, - &aOut, &nOut - ); - sqlite3_free(pLeft->aDoclist); - pLeft->aDoclist = aOut; - pLeft->nDoclist = nOut; - } - return rc; -} - - -/* -** Allocate an Fts3SegReaderArray for each token in the expression pExpr. -** The allocated objects are stored in the Fts3PhraseToken.pArray member -** variables of each token structure. -*/ -static int fts3ExprAllocateSegReaders( - Fts3Cursor *pCsr, /* FTS3 table */ - Fts3Expr *pExpr, /* Expression to create seg-readers for */ - int *pnExpr /* OUT: Number of AND'd expressions */ -){ - int rc = SQLITE_OK; /* Return code */ - - assert( pCsr->eEvalmode==FTS3_EVAL_FILTER ); - if( pnExpr && pExpr->eType!=FTSQUERY_AND ){ - (*pnExpr)++; - pnExpr = 0; - } - - if( pExpr->eType==FTSQUERY_PHRASE ){ - Fts3Phrase *pPhrase = pExpr->pPhrase; - int ii; - - for(ii=0; rc==SQLITE_OK && ii<pPhrase->nToken; ii++){ - Fts3PhraseToken *pTok = &pPhrase->aToken[ii]; - if( pTok->pSegcsr==0 ){ - rc = fts3TermSegReaderCursor( - pCsr, pTok->z, pTok->n, pTok->isPrefix, &pTok->pSegcsr - ); - } - } - }else{ - rc = fts3ExprAllocateSegReaders(pCsr, pExpr->pLeft, pnExpr); - if( rc==SQLITE_OK ){ - rc = fts3ExprAllocateSegReaders(pCsr, pExpr->pRight, pnExpr); - } - } - return rc; -} - -/* -** Free the Fts3SegReaderArray objects associated with each token in the -** expression pExpr. In other words, this function frees the resources -** allocated by fts3ExprAllocateSegReaders(). -*/ -static void fts3ExprFreeSegReaders(Fts3Expr *pExpr){ - if( pExpr ){ - Fts3Phrase *pPhrase = pExpr->pPhrase; - if( pPhrase ){ - int kk; - for(kk=0; kk<pPhrase->nToken; kk++){ - fts3SegReaderCursorFree(pPhrase->aToken[kk].pSegcsr); - pPhrase->aToken[kk].pSegcsr = 0; - } - } - fts3ExprFreeSegReaders(pExpr->pLeft); - fts3ExprFreeSegReaders(pExpr->pRight); - } -} - -/* -** Return the sum of the costs of all tokens in the expression pExpr. This -** function must be called after Fts3SegReaderArrays have been allocated -** for all tokens using fts3ExprAllocateSegReaders(). -*/ -static int fts3ExprCost(Fts3Expr *pExpr){ - int nCost; /* Return value */ - if( pExpr->eType==FTSQUERY_PHRASE ){ - Fts3Phrase *pPhrase = pExpr->pPhrase; - int ii; - nCost = 0; - for(ii=0; ii<pPhrase->nToken; ii++){ - Fts3SegReaderCursor *pSegcsr = pPhrase->aToken[ii].pSegcsr; - if( pSegcsr ) nCost += pSegcsr->nCost; - } - }else{ - nCost = fts3ExprCost(pExpr->pLeft) + fts3ExprCost(pExpr->pRight); - } - return nCost; -} - -/* -** The following is a helper function (and type) for fts3EvalExpr(). It -** must be called after Fts3SegReaders have been allocated for every token -** in the expression. See the context it is called from in fts3EvalExpr() -** for further explanation. -*/ -typedef struct ExprAndCost ExprAndCost; -struct ExprAndCost { - Fts3Expr *pExpr; - int nCost; -}; -static void fts3ExprAssignCosts( - Fts3Expr *pExpr, /* Expression to create seg-readers for */ - ExprAndCost **ppExprCost /* OUT: Write to *ppExprCost */ -){ - if( pExpr->eType==FTSQUERY_AND ){ - fts3ExprAssignCosts(pExpr->pLeft, ppExprCost); - fts3ExprAssignCosts(pExpr->pRight, ppExprCost); - }else{ - (*ppExprCost)->pExpr = pExpr; - (*ppExprCost)->nCost = fts3ExprCost(pExpr); - (*ppExprCost)++; - } -} - -/* -** Evaluate the full-text expression pExpr against FTS3 table pTab. Store -** the resulting doclist in *paOut and *pnOut. This routine mallocs for -** the space needed to store the output. The caller is responsible for -** freeing the space when it has finished. -** -** This function is called in two distinct contexts: -** -** * From within the virtual table xFilter() method. In this case, the -** output doclist contains entries for all rows in the table, based on -** data read from the full-text index. -** -** In this case, if the query expression contains one or more tokens that -** are very common, then the returned doclist may contain a superset of -** the documents that actually match the expression. -** -** * From within the virtual table xNext() method. This call is only made -** if the call from within xFilter() found that there were very common -** tokens in the query expression and did return a superset of the -** matching documents. In this case the returned doclist contains only -** entries that correspond to the current row of the table. Instead of -** reading the data for each token from the full-text index, the data is -** already available in-memory in the Fts3PhraseToken.pDeferred structures. -** See fts3EvalDeferred() for how it gets there. -** -** In the first case above, Fts3Cursor.doDeferred==0. In the second (if it is -** required) Fts3Cursor.doDeferred==1. -** -** If the SQLite invokes the snippet(), offsets() or matchinfo() function -** as part of a SELECT on an FTS3 table, this function is called on each -** individual phrase expression in the query. If there were very common tokens -** found in the xFilter() call, then this function is called once for phrase -** for each row visited, and the returned doclist contains entries for the -** current row only. Otherwise, if there were no very common tokens, then this -** function is called once only for each phrase in the query and the returned -** doclist contains entries for all rows of the table. -** -** Fts3Cursor.doDeferred==1 when this function is called on phrases as a -** result of a snippet(), offsets() or matchinfo() invocation. -*/ -static int fts3EvalExpr( - Fts3Cursor *p, /* Virtual table cursor handle */ - Fts3Expr *pExpr, /* Parsed fts3 expression */ - char **paOut, /* OUT: Pointer to malloc'd result buffer */ - int *pnOut, /* OUT: Size of buffer at *paOut */ - int isReqPos /* Require positions in output buffer */ -){ - int rc = SQLITE_OK; /* Return code */ - - /* Zero the output parameters. */ - *paOut = 0; - *pnOut = 0; - - if( pExpr ){ - assert( pExpr->eType==FTSQUERY_NEAR || pExpr->eType==FTSQUERY_OR - || pExpr->eType==FTSQUERY_AND || pExpr->eType==FTSQUERY_NOT - || pExpr->eType==FTSQUERY_PHRASE - ); - assert( pExpr->eType==FTSQUERY_PHRASE || isReqPos==0 ); - - if( pExpr->eType==FTSQUERY_PHRASE ){ - rc = fts3PhraseSelect(p, pExpr->pPhrase, - isReqPos || (pExpr->pParent && pExpr->pParent->eType==FTSQUERY_NEAR), - paOut, pnOut - ); - fts3ExprFreeSegReaders(pExpr); - }else if( p->eEvalmode==FTS3_EVAL_FILTER && pExpr->eType==FTSQUERY_AND ){ - ExprAndCost *aExpr = 0; /* Array of AND'd expressions and costs */ - int nExpr = 0; /* Size of aExpr[] */ - char *aRet = 0; /* Doclist to return to caller */ - int nRet = 0; /* Length of aRet[] in bytes */ - int nDoc = 0x7FFFFFFF; - - assert( !isReqPos ); - - rc = fts3ExprAllocateSegReaders(p, pExpr, &nExpr); - if( rc==SQLITE_OK ){ - assert( nExpr>1 ); - aExpr = sqlite3_malloc(sizeof(ExprAndCost) * nExpr); - if( !aExpr ) rc = SQLITE_NOMEM; - } - if( rc==SQLITE_OK ){ - int ii; /* Used to iterate through expressions */ - - fts3ExprAssignCosts(pExpr, &aExpr); - aExpr -= nExpr; - for(ii=0; ii<nExpr; ii++){ - char *aNew; - int nNew; - int jj; - ExprAndCost *pBest = 0; - - for(jj=0; jj<nExpr; jj++){ - ExprAndCost *pCand = &aExpr[jj]; - if( pCand->pExpr && (pBest==0 || pCand->nCost<pBest->nCost) ){ - pBest = pCand; - } - } - - if( pBest->nCost>nDoc ){ - rc = fts3DeferExpression(p, p->pExpr); - break; - }else{ - rc = fts3EvalExpr(p, pBest->pExpr, &aNew, &nNew, 0); - if( rc!=SQLITE_OK ) break; - pBest->pExpr = 0; - if( ii==0 ){ - aRet = aNew; - nRet = nNew; - nDoc = fts3DoclistCountDocids(0, aRet, nRet); - }else{ - fts3DoclistMerge( - MERGE_AND, 0, 0, aRet, &nRet, aRet, nRet, aNew, nNew, &nDoc - ); - sqlite3_free(aNew); - } - } - } - } - - if( rc==SQLITE_OK ){ - *paOut = aRet; - *pnOut = nRet; - }else{ - assert( *paOut==0 ); - sqlite3_free(aRet); - } - sqlite3_free(aExpr); - fts3ExprFreeSegReaders(pExpr); - - }else{ - char *aLeft; - char *aRight; - int nLeft; - int nRight; - - assert( pExpr->eType==FTSQUERY_NEAR - || pExpr->eType==FTSQUERY_OR - || pExpr->eType==FTSQUERY_NOT - || (pExpr->eType==FTSQUERY_AND && p->eEvalmode==FTS3_EVAL_NEXT) - ); - - if( 0==(rc = fts3EvalExpr(p, pExpr->pRight, &aRight, &nRight, isReqPos)) - && 0==(rc = fts3EvalExpr(p, pExpr->pLeft, &aLeft, &nLeft, isReqPos)) - ){ - switch( pExpr->eType ){ - case FTSQUERY_NEAR: { - Fts3Expr *pLeft; - Fts3Expr *pRight; - int mergetype = MERGE_NEAR; - if( pExpr->pParent && pExpr->pParent->eType==FTSQUERY_NEAR ){ - mergetype = MERGE_POS_NEAR; - } - pLeft = pExpr->pLeft; - while( pLeft->eType==FTSQUERY_NEAR ){ - pLeft=pLeft->pRight; - } - pRight = pExpr->pRight; - assert( pRight->eType==FTSQUERY_PHRASE ); - assert( pLeft->eType==FTSQUERY_PHRASE ); - - rc = fts3NearMerge(mergetype, pExpr->nNear, - pLeft->pPhrase->nToken, aLeft, nLeft, - pRight->pPhrase->nToken, aRight, nRight, - paOut, pnOut - ); - sqlite3_free(aLeft); - break; - } - - case FTSQUERY_OR: { - /* Allocate a buffer for the output. The maximum size is the - ** sum of the sizes of the two input buffers. The +1 term is - ** so that a buffer of zero bytes is never allocated - this can - ** cause fts3DoclistMerge() to incorrectly return SQLITE_NOMEM. - */ - char *aBuffer = sqlite3_malloc(nRight+nLeft+1); - rc = fts3DoclistMerge(MERGE_OR, 0, 0, aBuffer, pnOut, - aLeft, nLeft, aRight, nRight, 0 - ); - *paOut = aBuffer; - sqlite3_free(aLeft); - break; - } - - default: { - assert( FTSQUERY_NOT==MERGE_NOT && FTSQUERY_AND==MERGE_AND ); - fts3DoclistMerge(pExpr->eType, 0, 0, aLeft, pnOut, - aLeft, nLeft, aRight, nRight, 0 - ); - *paOut = aLeft; - break; - } - } - } - sqlite3_free(aRight); - } - } - - assert( rc==SQLITE_OK || *paOut==0 ); - return rc; -} - -/* -** This function is called from within xNext() for each row visited by -** an FTS3 query. If evaluating the FTS3 query expression within xFilter() -** was able to determine the exact set of matching rows, this function sets -** *pbRes to true and returns SQLITE_IO immediately. -** -** Otherwise, if evaluating the query expression within xFilter() returned a -** superset of the matching documents instead of an exact set (this happens -** when the query includes very common tokens and it is deemed too expensive to -** load their doclists from disk), this function tests if the current row -** really does match the FTS3 query. -** -** If an error occurs, an SQLite error code is returned. Otherwise, SQLITE_OK -** is returned and *pbRes is set to true if the current row matches the -** FTS3 query (and should be included in the results returned to SQLite), or -** false otherwise. -*/ -static int fts3EvalDeferred( - Fts3Cursor *pCsr, /* FTS3 cursor pointing at row to test */ - int *pbRes /* OUT: Set to true if row is a match */ -){ - int rc = SQLITE_OK; - if( pCsr->pDeferred==0 ){ - *pbRes = 1; - }else{ - rc = fts3CursorSeek(0, pCsr); - if( rc==SQLITE_OK ){ - sqlite3Fts3FreeDeferredDoclists(pCsr); - rc = sqlite3Fts3CacheDeferredDoclists(pCsr); - } - if( rc==SQLITE_OK ){ - char *a = 0; - int n = 0; - rc = fts3EvalExpr(pCsr, pCsr->pExpr, &a, &n, 0); - assert( n>=0 ); - *pbRes = (n>0); - sqlite3_free(a); - } - } - return rc; -} - -/* ** Advance the cursor to the next row in the %_content table that ** matches the search criteria. For a MATCH search, this will be ** the next row that matches. For a full-table scan, this will be @@ -113762,31 +114456,20 @@ static int fts3EvalDeferred( ** subsequently to determine whether or not an EOF was hit. */ static int fts3NextMethod(sqlite3_vtab_cursor *pCursor){ - int res; - int rc = SQLITE_OK; /* Return code */ + int rc; Fts3Cursor *pCsr = (Fts3Cursor *)pCursor; - - pCsr->eEvalmode = FTS3_EVAL_NEXT; - do { - if( pCsr->aDoclist==0 ){ - if( SQLITE_ROW!=sqlite3_step(pCsr->pStmt) ){ - pCsr->isEof = 1; - rc = sqlite3_reset(pCsr->pStmt); - break; - } - pCsr->iPrevId = sqlite3_column_int64(pCsr->pStmt, 0); + if( pCsr->eSearch==FTS3_DOCID_SEARCH || pCsr->eSearch==FTS3_FULLSCAN_SEARCH ){ + if( SQLITE_ROW!=sqlite3_step(pCsr->pStmt) ){ + pCsr->isEof = 1; + rc = sqlite3_reset(pCsr->pStmt); }else{ - if( pCsr->pNextId>=&pCsr->aDoclist[pCsr->nDoclist] ){ - pCsr->isEof = 1; - break; - } - sqlite3_reset(pCsr->pStmt); - fts3GetDeltaVarint(&pCsr->pNextId, &pCsr->iPrevId); - pCsr->isRequireSeek = 1; - pCsr->isMatchinfoNeeded = 1; + pCsr->iPrevId = sqlite3_column_int64(pCsr->pStmt, 0); + rc = SQLITE_OK; } - }while( SQLITE_OK==(rc = fts3EvalDeferred(pCsr, &res)) && res==0 ); - + }else{ + rc = sqlite3Fts3EvalNext((Fts3Cursor *)pCursor); + } + assert( ((Fts3Table *)pCsr->base.pVtab)->pSegments==0 ); return rc; } @@ -113813,11 +114496,7 @@ static int fts3FilterMethod( int nVal, /* Number of elements in apVal */ sqlite3_value **apVal /* Arguments for the indexing scheme */ ){ - const char *azSql[] = { - "SELECT %s FROM %Q.'%q_content' AS x WHERE docid = ?", /* non-full-scan */ - "SELECT %s FROM %Q.'%q_content' AS x ", /* full-scan */ - }; - int rc; /* Return code */ + int rc; char *zSql; /* SQL statement used to access %_content */ Fts3Table *p = (Fts3Table *)pCursor->pVtab; Fts3Cursor *pCsr = (Fts3Cursor *)pCursor; @@ -113836,6 +114515,13 @@ static int fts3FilterMethod( sqlite3Fts3ExprFree(pCsr->pExpr); memset(&pCursor[1], 0, sizeof(Fts3Cursor)-sizeof(sqlite3_vtab_cursor)); + if( idxStr ){ + pCsr->bDesc = (idxStr[0]=='D'); + }else{ + pCsr->bDesc = p->bDescIdx; + } + pCsr->eSearch = (i16)idxNum; + if( idxNum!=FTS3_DOCID_SEARCH && idxNum!=FTS3_FULLSCAN_SEARCH ){ int iCol = idxNum-FTS3_FULLTEXT_SEARCH; const char *zQuery = (const char *)sqlite3_value_text(apVal[0]); @@ -113849,8 +114535,8 @@ static int fts3FilterMethod( ); if( rc!=SQLITE_OK ){ if( rc==SQLITE_ERROR ){ - p->base.zErrMsg = sqlite3_mprintf("malformed MATCH expression: [%s]", - zQuery); + static const char *zErr = "malformed MATCH expression: [%s]"; + p->base.zErrMsg = sqlite3_mprintf(zErr, zQuery); } return rc; } @@ -113858,7 +114544,8 @@ static int fts3FilterMethod( rc = sqlite3Fts3ReadLock(p); if( rc!=SQLITE_OK ) return rc; - rc = fts3EvalExpr(pCsr, pCsr->pExpr, &pCsr->aDoclist, &pCsr->nDoclist, 0); + rc = sqlite3Fts3EvalStart(pCsr, pCsr->pExpr, 1); + sqlite3Fts3SegmentsClose(p); if( rc!=SQLITE_OK ) return rc; pCsr->pNextId = pCsr->aDoclist; @@ -113870,20 +114557,24 @@ static int fts3FilterMethod( ** full-text query or docid lookup, the statement retrieves a single ** row by docid. */ - zSql = (char *)azSql[idxNum==FTS3_FULLSCAN_SEARCH]; - zSql = sqlite3_mprintf(zSql, p->zReadExprlist, p->zDb, p->zName); - if( !zSql ){ - rc = SQLITE_NOMEM; + if( idxNum==FTS3_FULLSCAN_SEARCH ){ + const char *zSort = (pCsr->bDesc ? "DESC" : "ASC"); + const char *zTmpl = "SELECT %s FROM %Q.'%q_content' AS x ORDER BY docid %s"; + zSql = sqlite3_mprintf(zTmpl, p->zReadExprlist, p->zDb, p->zName, zSort); }else{ - rc = sqlite3_prepare_v2(p->db, zSql, -1, &pCsr->pStmt, 0); - sqlite3_free(zSql); + const char *zTmpl = "SELECT %s FROM %Q.'%q_content' AS x WHERE docid = ?"; + zSql = sqlite3_mprintf(zTmpl, p->zReadExprlist, p->zDb, p->zName); } - if( rc==SQLITE_OK && idxNum==FTS3_DOCID_SEARCH ){ + if( !zSql ) return SQLITE_NOMEM; + rc = sqlite3_prepare_v2(p->db, zSql, -1, &pCsr->pStmt, 0); + sqlite3_free(zSql); + if( rc!=SQLITE_OK ) return rc; + + if( idxNum==FTS3_DOCID_SEARCH ){ rc = sqlite3_bind_value(pCsr->pStmt, 1, apVal[0]); + if( rc!=SQLITE_OK ) return rc; } - pCsr->eSearch = (i16)idxNum; - if( rc!=SQLITE_OK ) return rc; return fts3NextMethod(pCursor); } @@ -113903,16 +114594,7 @@ static int fts3EofMethod(sqlite3_vtab_cursor *pCursor){ */ static int fts3RowidMethod(sqlite3_vtab_cursor *pCursor, sqlite_int64 *pRowid){ Fts3Cursor *pCsr = (Fts3Cursor *) pCursor; - if( pCsr->aDoclist ){ - *pRowid = pCsr->iPrevId; - }else{ - /* This branch runs if the query is implemented using a full-table scan - ** (not using the full-text index). In this case grab the rowid from the - ** SELECT statement. - */ - assert( pCsr->isRequireSeek==0 ); - *pRowid = sqlite3_column_int64(pCsr->pStmt, 0); - } + *pRowid = pCsr->iPrevId; return SQLITE_OK; } @@ -113925,7 +114607,7 @@ static int fts3ColumnMethod( sqlite3_context *pContext, /* Context for sqlite3_result_xxx() calls */ int iCol /* Index of column to read value from */ ){ - int rc; /* Return Code */ + int rc = SQLITE_OK; /* Return Code */ Fts3Cursor *pCsr = (Fts3Cursor *) pCursor; Fts3Table *p = (Fts3Table *)pCursor->pVtab; @@ -113936,21 +114618,20 @@ static int fts3ColumnMethod( /* This call is a request for the "docid" column. Since "docid" is an ** alias for "rowid", use the xRowid() method to obtain the value. */ - sqlite3_int64 iRowid; - rc = fts3RowidMethod(pCursor, &iRowid); - sqlite3_result_int64(pContext, iRowid); + sqlite3_result_int64(pContext, pCsr->iPrevId); }else if( iCol==p->nColumn ){ /* The extra column whose name is the same as the table. ** Return a blob which is a pointer to the cursor. */ sqlite3_result_blob(pContext, &pCsr, sizeof(pCsr), SQLITE_TRANSIENT); - rc = SQLITE_OK; }else{ rc = fts3CursorSeek(0, pCsr); if( rc==SQLITE_OK ){ sqlite3_result_value(pContext, sqlite3_column_value(pCsr->pStmt, iCol+1)); } } + + assert( ((Fts3Table *)pCsr->base.pVtab)->pSegments==0 ); return rc; } @@ -113982,8 +114663,13 @@ static int fts3SyncMethod(sqlite3_vtab *pVtab){ ** Implementation of xBegin() method. This is a no-op. */ static int fts3BeginMethod(sqlite3_vtab *pVtab){ + TESTONLY( Fts3Table *p = (Fts3Table*)pVtab ); UNUSED_PARAMETER(pVtab); - assert( ((Fts3Table *)pVtab)->nPendingData==0 ); + assert( p->pSegments==0 ); + assert( p->nPendingData==0 ); + assert( p->inTransaction!=1 ); + TESTONLY( p->inTransaction = 1 ); + TESTONLY( p->mxSavepoint = -1; ); return SQLITE_OK; } @@ -113993,8 +114679,13 @@ static int fts3BeginMethod(sqlite3_vtab *pVtab){ ** by fts3SyncMethod(). */ static int fts3CommitMethod(sqlite3_vtab *pVtab){ + TESTONLY( Fts3Table *p = (Fts3Table*)pVtab ); UNUSED_PARAMETER(pVtab); - assert( ((Fts3Table *)pVtab)->nPendingData==0 ); + assert( p->nPendingData==0 ); + assert( p->inTransaction!=0 ); + assert( p->pSegments==0 ); + TESTONLY( p->inTransaction = 0 ); + TESTONLY( p->mxSavepoint = -1; ); return SQLITE_OK; } @@ -114003,93 +114694,31 @@ static int fts3CommitMethod(sqlite3_vtab *pVtab){ ** hash-table. Any changes made to the database are reverted by SQLite. */ static int fts3RollbackMethod(sqlite3_vtab *pVtab){ - sqlite3Fts3PendingTermsClear((Fts3Table *)pVtab); + Fts3Table *p = (Fts3Table*)pVtab; + sqlite3Fts3PendingTermsClear(p); + assert( p->inTransaction!=0 ); + TESTONLY( p->inTransaction = 0 ); + TESTONLY( p->mxSavepoint = -1; ); return SQLITE_OK; } /* -** Load the doclist associated with expression pExpr to pExpr->aDoclist. -** The loaded doclist contains positions as well as the document ids. -** This is used by the matchinfo(), snippet() and offsets() auxillary -** functions. +** When called, *ppPoslist must point to the byte immediately following the +** end of a position-list. i.e. ( (*ppPoslist)[-1]==POS_END ). This function +** moves *ppPoslist so that it instead points to the first byte of the +** same position list. */ -SQLITE_PRIVATE int sqlite3Fts3ExprLoadDoclist(Fts3Cursor *pCsr, Fts3Expr *pExpr){ - int rc; - assert( pExpr->eType==FTSQUERY_PHRASE && pExpr->pPhrase ); - assert( pCsr->eEvalmode==FTS3_EVAL_NEXT ); - rc = fts3EvalExpr(pCsr, pExpr, &pExpr->aDoclist, &pExpr->nDoclist, 1); - return rc; -} - -SQLITE_PRIVATE int sqlite3Fts3ExprLoadFtDoclist( - Fts3Cursor *pCsr, - Fts3Expr *pExpr, - char **paDoclist, - int *pnDoclist -){ - int rc; - assert( pCsr->eEvalmode==FTS3_EVAL_NEXT ); - assert( pExpr->eType==FTSQUERY_PHRASE && pExpr->pPhrase ); - pCsr->eEvalmode = FTS3_EVAL_MATCHINFO; - rc = fts3EvalExpr(pCsr, pExpr, paDoclist, pnDoclist, 1); - pCsr->eEvalmode = FTS3_EVAL_NEXT; - return rc; -} +static void fts3ReversePoslist(char *pStart, char **ppPoslist){ + char *p = &(*ppPoslist)[-2]; + char c; -/* -** After ExprLoadDoclist() (see above) has been called, this function is -** used to iterate/search through the position lists that make up the doclist -** stored in pExpr->aDoclist. -*/ -SQLITE_PRIVATE char *sqlite3Fts3FindPositions( - Fts3Expr *pExpr, /* Access this expressions doclist */ - sqlite3_int64 iDocid, /* Docid associated with requested pos-list */ - int iCol /* Column of requested pos-list */ -){ - assert( pExpr->isLoaded ); - if( pExpr->aDoclist ){ - char *pEnd = &pExpr->aDoclist[pExpr->nDoclist]; - char *pCsr; - - if( pExpr->pCurrent==0 ){ - pExpr->pCurrent = pExpr->aDoclist; - pExpr->iCurrent = 0; - pExpr->pCurrent += sqlite3Fts3GetVarint(pExpr->pCurrent,&pExpr->iCurrent); - } - pCsr = pExpr->pCurrent; - assert( pCsr ); - - while( pCsr<pEnd ){ - if( pExpr->iCurrent<iDocid ){ - fts3PoslistCopy(0, &pCsr); - if( pCsr<pEnd ){ - fts3GetDeltaVarint(&pCsr, &pExpr->iCurrent); - } - pExpr->pCurrent = pCsr; - }else{ - if( pExpr->iCurrent==iDocid ){ - int iThis = 0; - if( iCol<0 ){ - /* If iCol is negative, return a pointer to the start of the - ** position-list (instead of a pointer to the start of a list - ** of offsets associated with a specific column). - */ - return pCsr; - } - while( iThis<iCol ){ - fts3ColumnlistCopy(0, &pCsr); - if( *pCsr==0x00 ) return 0; - pCsr++; - pCsr += sqlite3Fts3GetVarint32(pCsr, &iThis); - } - if( iCol==iThis && (*pCsr&0xFE) ) return pCsr; - } - return 0; - } - } + while( p>pStart && (c=*p--)==0 ); + while( p>pStart && (*p & 0x80) | c ){ + c = *p--; } - - return 0; + if( p>pStart ){ p = &p[2]; } + while( *p++&0x80 ); + *ppPoslist = p; } /* @@ -114322,8 +114951,34 @@ static int fts3RenameMethod( return rc; } +static int fts3SavepointMethod(sqlite3_vtab *pVtab, int iSavepoint){ + UNUSED_PARAMETER(iSavepoint); + assert( ((Fts3Table *)pVtab)->inTransaction ); + assert( ((Fts3Table *)pVtab)->mxSavepoint < iSavepoint ); + TESTONLY( ((Fts3Table *)pVtab)->mxSavepoint = iSavepoint ); + return fts3SyncMethod(pVtab); +} +static int fts3ReleaseMethod(sqlite3_vtab *pVtab, int iSavepoint){ + TESTONLY( Fts3Table *p = (Fts3Table*)pVtab ); + UNUSED_PARAMETER(iSavepoint); + UNUSED_PARAMETER(pVtab); + assert( p->inTransaction ); + assert( p->mxSavepoint >= iSavepoint ); + TESTONLY( p->mxSavepoint = iSavepoint-1 ); + return SQLITE_OK; +} +static int fts3RollbackToMethod(sqlite3_vtab *pVtab, int iSavepoint){ + Fts3Table *p = (Fts3Table*)pVtab; + UNUSED_PARAMETER(iSavepoint); + assert( p->inTransaction ); + assert( p->mxSavepoint >= iSavepoint ); + TESTONLY( p->mxSavepoint = iSavepoint ); + sqlite3Fts3PendingTermsClear(p); + return SQLITE_OK; +} + static const sqlite3_module fts3Module = { - /* iVersion */ 0, + /* iVersion */ 2, /* xCreate */ fts3CreateMethod, /* xConnect */ fts3ConnectMethod, /* xBestIndex */ fts3BestIndexMethod, @@ -114343,6 +114998,9 @@ static const sqlite3_module fts3Module = { /* xRollback */ fts3RollbackMethod, /* xFindFunction */ fts3FindFunctionMethod, /* xRename */ fts3RenameMethod, + /* xSavepoint */ fts3SavepointMethod, + /* xRelease */ fts3ReleaseMethod, + /* xRollbackTo */ fts3RollbackToMethod, }; /* @@ -114389,6 +115047,11 @@ SQLITE_PRIVATE int sqlite3Fts3Init(sqlite3 *db){ sqlite3Fts3IcuTokenizerModule(&pIcu); #endif +#ifdef SQLITE_TEST + rc = sqlite3Fts3InitTerm(db); + if( rc!=SQLITE_OK ) return rc; +#endif + rc = sqlite3Fts3InitAux(db); if( rc!=SQLITE_OK ) return rc; @@ -114464,6 +115127,1308 @@ SQLITE_API int sqlite3_extension_init( } #endif + +/* +** Allocate an Fts3MultiSegReader for each token in the expression headed +** by pExpr. +** +** An Fts3SegReader object is a cursor that can seek or scan a range of +** entries within a single segment b-tree. An Fts3MultiSegReader uses multiple +** Fts3SegReader objects internally to provide an interface to seek or scan +** within the union of all segments of a b-tree. Hence the name. +** +** If the allocated Fts3MultiSegReader just seeks to a single entry in a +** segment b-tree (if the term is not a prefix or it is a prefix for which +** there exists prefix b-tree of the right length) then it may be traversed +** and merged incrementally. Otherwise, it has to be merged into an in-memory +** doclist and then traversed. +*/ +static void fts3EvalAllocateReaders( + Fts3Cursor *pCsr, + Fts3Expr *pExpr, + int *pnToken, /* OUT: Total number of tokens in phrase. */ + int *pnOr, /* OUT: Total number of OR nodes in expr. */ + int *pRc +){ + if( pExpr && SQLITE_OK==*pRc ){ + if( pExpr->eType==FTSQUERY_PHRASE ){ + int i; + int nToken = pExpr->pPhrase->nToken; + *pnToken += nToken; + for(i=0; i<nToken; i++){ + Fts3PhraseToken *pToken = &pExpr->pPhrase->aToken[i]; + int rc = sqlite3Fts3TermSegReaderCursor(pCsr, + pToken->z, pToken->n, pToken->isPrefix, &pToken->pSegcsr + ); + if( rc!=SQLITE_OK ){ + *pRc = rc; + return; + } + } + assert( pExpr->pPhrase->iDoclistToken==0 ); + pExpr->pPhrase->iDoclistToken = -1; + }else{ + *pnOr += (pExpr->eType==FTSQUERY_OR); + fts3EvalAllocateReaders(pCsr, pExpr->pLeft, pnToken, pnOr, pRc); + fts3EvalAllocateReaders(pCsr, pExpr->pRight, pnToken, pnOr, pRc); + } + } +} + +static void fts3EvalPhraseMergeToken( + Fts3Table *pTab, + Fts3Phrase *p, + int iToken, + char *pList, + int nList +){ + assert( iToken!=p->iDoclistToken ); + + if( pList==0 ){ + sqlite3_free(p->doclist.aAll); + p->doclist.aAll = 0; + p->doclist.nAll = 0; + } + + else if( p->iDoclistToken<0 ){ + p->doclist.aAll = pList; + p->doclist.nAll = nList; + } + + else if( p->doclist.aAll==0 ){ + sqlite3_free(pList); + } + + else { + char *pLeft; + char *pRight; + int nLeft; + int nRight; + int nDiff; + + if( p->iDoclistToken<iToken ){ + pLeft = p->doclist.aAll; + nLeft = p->doclist.nAll; + pRight = pList; + nRight = nList; + nDiff = iToken - p->iDoclistToken; + }else{ + pRight = p->doclist.aAll; + nRight = p->doclist.nAll; + pLeft = pList; + nLeft = nList; + nDiff = p->iDoclistToken - iToken; + } + + fts3DoclistPhraseMerge(pTab->bDescIdx, nDiff, pLeft, nLeft, pRight,&nRight); + sqlite3_free(pLeft); + p->doclist.aAll = pRight; + p->doclist.nAll = nRight; + } + + if( iToken>p->iDoclistToken ) p->iDoclistToken = iToken; +} + +static int fts3EvalPhraseLoad( + Fts3Cursor *pCsr, + Fts3Phrase *p +){ + Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab; + int iToken; + int rc = SQLITE_OK; + + for(iToken=0; rc==SQLITE_OK && iToken<p->nToken; iToken++){ + Fts3PhraseToken *pToken = &p->aToken[iToken]; + assert( pToken->pDeferred==0 || pToken->pSegcsr==0 ); + + if( pToken->pSegcsr ){ + int nThis = 0; + char *pThis = 0; + rc = fts3TermSelect(pTab, pToken, p->iColumn, 1, &nThis, &pThis); + if( rc==SQLITE_OK ){ + fts3EvalPhraseMergeToken(pTab, p, iToken, pThis, nThis); + } + } + assert( pToken->pSegcsr==0 ); + } + + return rc; +} + +static int fts3EvalDeferredPhrase(Fts3Cursor *pCsr, Fts3Phrase *pPhrase){ + int iToken; + int rc = SQLITE_OK; + + int nMaxUndeferred = pPhrase->iDoclistToken; + char *aPoslist = 0; + int nPoslist = 0; + int iPrev = -1; + + assert( pPhrase->doclist.bFreeList==0 ); + + for(iToken=0; rc==SQLITE_OK && iToken<pPhrase->nToken; iToken++){ + Fts3PhraseToken *pToken = &pPhrase->aToken[iToken]; + Fts3DeferredToken *pDeferred = pToken->pDeferred; + + if( pDeferred ){ + char *pList; + int nList; + rc = sqlite3Fts3DeferredTokenList(pDeferred, &pList, &nList); + if( rc!=SQLITE_OK ) return rc; + + if( pList==0 ){ + sqlite3_free(aPoslist); + pPhrase->doclist.pList = 0; + pPhrase->doclist.nList = 0; + return SQLITE_OK; + + }else if( aPoslist==0 ){ + aPoslist = pList; + nPoslist = nList; + + }else{ + char *aOut = pList; + char *p1 = aPoslist; + char *p2 = aOut; + + assert( iPrev>=0 ); + fts3PoslistPhraseMerge(&aOut, iToken-iPrev, 0, 1, &p1, &p2); + sqlite3_free(aPoslist); + aPoslist = pList; + nPoslist = aOut - aPoslist; + if( nPoslist==0 ){ + sqlite3_free(aPoslist); + pPhrase->doclist.pList = 0; + pPhrase->doclist.nList = 0; + return SQLITE_OK; + } + } + iPrev = iToken; + } + } + + if( iPrev>=0 ){ + if( nMaxUndeferred<0 ){ + pPhrase->doclist.pList = aPoslist; + pPhrase->doclist.nList = nPoslist; + pPhrase->doclist.iDocid = pCsr->iPrevId; + pPhrase->doclist.bFreeList = 1; + }else{ + int nDistance; + char *p1; + char *p2; + char *aOut; + + if( nMaxUndeferred>iPrev ){ + p1 = aPoslist; + p2 = pPhrase->doclist.pList; + nDistance = nMaxUndeferred - iPrev; + }else{ + p1 = pPhrase->doclist.pList; + p2 = aPoslist; + nDistance = iPrev - nMaxUndeferred; + } + + aOut = (char *)sqlite3_malloc(nPoslist+8); + if( !aOut ){ + sqlite3_free(aPoslist); + return SQLITE_NOMEM; + } + + pPhrase->doclist.pList = aOut; + if( fts3PoslistPhraseMerge(&aOut, nDistance, 0, 1, &p1, &p2) ){ + pPhrase->doclist.bFreeList = 1; + pPhrase->doclist.nList = (aOut - pPhrase->doclist.pList); + }else{ + sqlite3_free(aOut); + pPhrase->doclist.pList = 0; + pPhrase->doclist.nList = 0; + } + sqlite3_free(aPoslist); + } + } + + return SQLITE_OK; +} + +/* +** This function is called for each Fts3Phrase in a full-text query +** expression to initialize the mechanism for returning rows. Once this +** function has been called successfully on an Fts3Phrase, it may be +** used with fts3EvalPhraseNext() to iterate through the matching docids. +*/ +static int fts3EvalPhraseStart(Fts3Cursor *pCsr, int bOptOk, Fts3Phrase *p){ + int rc; + Fts3PhraseToken *pFirst = &p->aToken[0]; + Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab; + + if( pCsr->bDesc==pTab->bDescIdx + && bOptOk==1 + && p->nToken==1 + && pFirst->pSegcsr + && pFirst->pSegcsr->bLookup + ){ + /* Use the incremental approach. */ + int iCol = (p->iColumn >= pTab->nColumn ? -1 : p->iColumn); + rc = sqlite3Fts3MsrIncrStart( + pTab, pFirst->pSegcsr, iCol, pFirst->z, pFirst->n); + p->bIncr = 1; + + }else{ + /* Load the full doclist for the phrase into memory. */ + rc = fts3EvalPhraseLoad(pCsr, p); + p->bIncr = 0; + } + + assert( rc!=SQLITE_OK || p->nToken<1 || p->aToken[0].pSegcsr==0 || p->bIncr ); + return rc; +} + +/* +** This function is used to iterate backwards (from the end to start) +** through doclists. +*/ +SQLITE_PRIVATE void sqlite3Fts3DoclistPrev( + int bDescIdx, /* True if the doclist is desc */ + char *aDoclist, /* Pointer to entire doclist */ + int nDoclist, /* Length of aDoclist in bytes */ + char **ppIter, /* IN/OUT: Iterator pointer */ + sqlite3_int64 *piDocid, /* IN/OUT: Docid pointer */ + int *pnList, /* IN/OUT: List length pointer */ + u8 *pbEof /* OUT: End-of-file flag */ +){ + char *p = *ppIter; + + assert( nDoclist>0 ); + assert( *pbEof==0 ); + assert( p || *piDocid==0 ); + assert( !p || (p>aDoclist && p<&aDoclist[nDoclist]) ); + + if( p==0 ){ + sqlite3_int64 iDocid = 0; + char *pNext = 0; + char *pDocid = aDoclist; + char *pEnd = &aDoclist[nDoclist]; + int iMul = 1; + + while( pDocid<pEnd ){ + sqlite3_int64 iDelta; + pDocid += sqlite3Fts3GetVarint(pDocid, &iDelta); + iDocid += (iMul * iDelta); + pNext = pDocid; + fts3PoslistCopy(0, &pDocid); + while( pDocid<pEnd && *pDocid==0 ) pDocid++; + iMul = (bDescIdx ? -1 : 1); + } + + *pnList = pEnd - pNext; + *ppIter = pNext; + *piDocid = iDocid; + }else{ + int iMul = (bDescIdx ? -1 : 1); + sqlite3_int64 iDelta; + fts3GetReverseVarint(&p, aDoclist, &iDelta); + *piDocid -= (iMul * iDelta); + + if( p==aDoclist ){ + *pbEof = 1; + }else{ + char *pSave = p; + fts3ReversePoslist(aDoclist, &p); + *pnList = (pSave - p); + } + *ppIter = p; + } +} + +/* +** Attempt to move the phrase iterator to point to the next matching docid. +** If an error occurs, return an SQLite error code. Otherwise, return +** SQLITE_OK. +** +** If there is no "next" entry and no error occurs, then *pbEof is set to +** 1 before returning. Otherwise, if no error occurs and the iterator is +** successfully advanced, *pbEof is set to 0. +*/ +static int fts3EvalPhraseNext( + Fts3Cursor *pCsr, + Fts3Phrase *p, + u8 *pbEof +){ + int rc = SQLITE_OK; + Fts3Doclist *pDL = &p->doclist; + Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab; + + if( p->bIncr ){ + assert( p->nToken==1 ); + assert( pDL->pNextDocid==0 ); + rc = sqlite3Fts3MsrIncrNext(pTab, p->aToken[0].pSegcsr, + &pDL->iDocid, &pDL->pList, &pDL->nList + ); + if( rc==SQLITE_OK && !pDL->pList ){ + *pbEof = 1; + } + }else if( pCsr->bDesc!=pTab->bDescIdx && pDL->nAll ){ + sqlite3Fts3DoclistPrev(pTab->bDescIdx, pDL->aAll, pDL->nAll, + &pDL->pNextDocid, &pDL->iDocid, &pDL->nList, pbEof + ); + pDL->pList = pDL->pNextDocid; + }else{ + char *pIter; /* Used to iterate through aAll */ + char *pEnd = &pDL->aAll[pDL->nAll]; /* 1 byte past end of aAll */ + if( pDL->pNextDocid ){ + pIter = pDL->pNextDocid; + }else{ + pIter = pDL->aAll; + } + + if( pIter>=pEnd ){ + /* We have already reached the end of this doclist. EOF. */ + *pbEof = 1; + }else{ + sqlite3_int64 iDelta; + pIter += sqlite3Fts3GetVarint(pIter, &iDelta); + if( pTab->bDescIdx==0 || pDL->pNextDocid==0 ){ + pDL->iDocid += iDelta; + }else{ + pDL->iDocid -= iDelta; + } + pDL->pList = pIter; + fts3PoslistCopy(0, &pIter); + pDL->nList = (pIter - pDL->pList); + + /* pIter now points just past the 0x00 that terminates the position- + ** list for document pDL->iDocid. However, if this position-list was + ** edited in place by fts3EvalNearTrim2(), then pIter may not actually + ** point to the start of the next docid value. The following line deals + ** with this case by advancing pIter past the zero-padding added by + ** fts3EvalNearTrim2(). */ + while( pIter<pEnd && *pIter==0 ) pIter++; + + pDL->pNextDocid = pIter; + assert( pIter>=&pDL->aAll[pDL->nAll] || *pIter ); + *pbEof = 0; + } + } + + return rc; +} + +static void fts3EvalStartReaders( + Fts3Cursor *pCsr, + Fts3Expr *pExpr, + int bOptOk, + int *pRc +){ + if( pExpr && SQLITE_OK==*pRc ){ + if( pExpr->eType==FTSQUERY_PHRASE ){ + int i; + int nToken = pExpr->pPhrase->nToken; + for(i=0; i<nToken; i++){ + if( pExpr->pPhrase->aToken[i].pDeferred==0 ) break; + } + pExpr->bDeferred = (i==nToken); + *pRc = fts3EvalPhraseStart(pCsr, bOptOk, pExpr->pPhrase); + }else{ + fts3EvalStartReaders(pCsr, pExpr->pLeft, bOptOk, pRc); + fts3EvalStartReaders(pCsr, pExpr->pRight, bOptOk, pRc); + pExpr->bDeferred = (pExpr->pLeft->bDeferred && pExpr->pRight->bDeferred); + } + } +} + +typedef struct Fts3TokenAndCost Fts3TokenAndCost; +struct Fts3TokenAndCost { + Fts3Phrase *pPhrase; /* The phrase the token belongs to */ + int iToken; /* Position of token in phrase */ + Fts3PhraseToken *pToken; /* The token itself */ + Fts3Expr *pRoot; + int nOvfl; + int iCol; /* The column the token must match */ +}; + +static void fts3EvalTokenCosts( + Fts3Cursor *pCsr, + Fts3Expr *pRoot, + Fts3Expr *pExpr, + Fts3TokenAndCost **ppTC, + Fts3Expr ***ppOr, + int *pRc +){ + if( *pRc==SQLITE_OK && pExpr ){ + if( pExpr->eType==FTSQUERY_PHRASE ){ + Fts3Phrase *pPhrase = pExpr->pPhrase; + int i; + for(i=0; *pRc==SQLITE_OK && i<pPhrase->nToken; i++){ + Fts3TokenAndCost *pTC = (*ppTC)++; + pTC->pPhrase = pPhrase; + pTC->iToken = i; + pTC->pRoot = pRoot; + pTC->pToken = &pPhrase->aToken[i]; + pTC->iCol = pPhrase->iColumn; + *pRc = sqlite3Fts3MsrOvfl(pCsr, pTC->pToken->pSegcsr, &pTC->nOvfl); + } + }else if( pExpr->eType!=FTSQUERY_NOT ){ + if( pExpr->eType==FTSQUERY_OR ){ + pRoot = pExpr->pLeft; + **ppOr = pRoot; + (*ppOr)++; + } + fts3EvalTokenCosts(pCsr, pRoot, pExpr->pLeft, ppTC, ppOr, pRc); + if( pExpr->eType==FTSQUERY_OR ){ + pRoot = pExpr->pRight; + **ppOr = pRoot; + (*ppOr)++; + } + fts3EvalTokenCosts(pCsr, pRoot, pExpr->pRight, ppTC, ppOr, pRc); + } + } +} + +static int fts3EvalAverageDocsize(Fts3Cursor *pCsr, int *pnPage){ + if( pCsr->nRowAvg==0 ){ + /* The average document size, which is required to calculate the cost + ** of each doclist, has not yet been determined. Read the required + ** data from the %_stat table to calculate it. + ** + ** Entry 0 of the %_stat table is a blob containing (nCol+1) FTS3 + ** varints, where nCol is the number of columns in the FTS3 table. + ** The first varint is the number of documents currently stored in + ** the table. The following nCol varints contain the total amount of + ** data stored in all rows of each column of the table, from left + ** to right. + */ + int rc; + Fts3Table *p = (Fts3Table*)pCsr->base.pVtab; + sqlite3_stmt *pStmt; + sqlite3_int64 nDoc = 0; + sqlite3_int64 nByte = 0; + const char *pEnd; + const char *a; + + rc = sqlite3Fts3SelectDoctotal(p, &pStmt); + if( rc!=SQLITE_OK ) return rc; + a = sqlite3_column_blob(pStmt, 0); + assert( a ); + + pEnd = &a[sqlite3_column_bytes(pStmt, 0)]; + a += sqlite3Fts3GetVarint(a, &nDoc); + while( a<pEnd ){ + a += sqlite3Fts3GetVarint(a, &nByte); + } + if( nDoc==0 || nByte==0 ){ + sqlite3_reset(pStmt); + return SQLITE_CORRUPT_VTAB; + } + + pCsr->nDoc = nDoc; + pCsr->nRowAvg = (int)(((nByte / nDoc) + p->nPgsz) / p->nPgsz); + assert( pCsr->nRowAvg>0 ); + rc = sqlite3_reset(pStmt); + if( rc!=SQLITE_OK ) return rc; + } + + *pnPage = pCsr->nRowAvg; + return SQLITE_OK; +} + +static int fts3EvalSelectDeferred( + Fts3Cursor *pCsr, + Fts3Expr *pRoot, + Fts3TokenAndCost *aTC, + int nTC +){ + int nDocSize = 0; + int nDocEst = 0; + int rc = SQLITE_OK; + Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab; + int ii; + + int nOvfl = 0; + int nTerm = 0; + + for(ii=0; ii<nTC; ii++){ + if( aTC[ii].pRoot==pRoot ){ + nOvfl += aTC[ii].nOvfl; + nTerm++; + } + } + if( nOvfl==0 || nTerm<2 ) return SQLITE_OK; + + rc = fts3EvalAverageDocsize(pCsr, &nDocSize); + + for(ii=0; ii<nTerm && rc==SQLITE_OK; ii++){ + int jj; + Fts3TokenAndCost *pTC = 0; + + for(jj=0; jj<nTC; jj++){ + if( aTC[jj].pToken && aTC[jj].pRoot==pRoot + && (!pTC || aTC[jj].nOvfl<pTC->nOvfl) + ){ + pTC = &aTC[jj]; + } + } + assert( pTC ); + + /* At this point pTC points to the cheapest remaining token. */ + if( ii==0 ){ + if( pTC->nOvfl ){ + nDocEst = (pTC->nOvfl * pTab->nPgsz + pTab->nPgsz) / 10; + }else{ + Fts3PhraseToken *pToken = pTC->pToken; + int nList = 0; + char *pList = 0; + rc = fts3TermSelect(pTab, pToken, pTC->iCol, 1, &nList, &pList); + assert( rc==SQLITE_OK || pList==0 ); + + if( rc==SQLITE_OK ){ + nDocEst = fts3DoclistCountDocids(1, pList, nList); + fts3EvalPhraseMergeToken(pTab, pTC->pPhrase, pTC->iToken,pList,nList); + } + } + }else{ + if( pTC->nOvfl>=(nDocEst*nDocSize) ){ + Fts3PhraseToken *pToken = pTC->pToken; + rc = sqlite3Fts3DeferToken(pCsr, pToken, pTC->iCol); + fts3SegReaderCursorFree(pToken->pSegcsr); + pToken->pSegcsr = 0; + } + nDocEst = 1 + (nDocEst/4); + } + pTC->pToken = 0; + } + + return rc; +} + +SQLITE_PRIVATE int sqlite3Fts3EvalStart(Fts3Cursor *pCsr, Fts3Expr *pExpr, int bOptOk){ + Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab; + int rc = SQLITE_OK; + int nToken = 0; + int nOr = 0; + + /* Allocate a MultiSegReader for each token in the expression. */ + fts3EvalAllocateReaders(pCsr, pExpr, &nToken, &nOr, &rc); + + /* Call fts3EvalPhraseStart() on all phrases in the expression. TODO: + ** This call will eventually also be responsible for determining which + ** tokens are 'deferred' until the document text is loaded into memory. + ** + ** Each token in each phrase is dealt with using one of the following + ** three strategies: + ** + ** 1. Entire doclist loaded into memory as part of the + ** fts3EvalStartReaders() call. + ** + ** 2. Doclist loaded into memory incrementally, as part of each + ** sqlite3Fts3EvalNext() call. + ** + ** 3. Token doclist is never loaded. Instead, documents are loaded into + ** memory and scanned for the token as part of the sqlite3Fts3EvalNext() + ** call. This is known as a "deferred" token. + */ + + /* If bOptOk is true, check if there are any tokens that should be deferred. + */ + if( rc==SQLITE_OK && bOptOk && nToken>1 && pTab->bHasStat ){ + Fts3TokenAndCost *aTC; + Fts3Expr **apOr; + aTC = (Fts3TokenAndCost *)sqlite3_malloc( + sizeof(Fts3TokenAndCost) * nToken + + sizeof(Fts3Expr *) * nOr * 2 + ); + apOr = (Fts3Expr **)&aTC[nToken]; + + if( !aTC ){ + rc = SQLITE_NOMEM; + }else{ + int ii; + Fts3TokenAndCost *pTC = aTC; + Fts3Expr **ppOr = apOr; + + fts3EvalTokenCosts(pCsr, 0, pExpr, &pTC, &ppOr, &rc); + nToken = pTC-aTC; + nOr = ppOr-apOr; + + if( rc==SQLITE_OK ){ + rc = fts3EvalSelectDeferred(pCsr, 0, aTC, nToken); + for(ii=0; rc==SQLITE_OK && ii<nOr; ii++){ + rc = fts3EvalSelectDeferred(pCsr, apOr[ii], aTC, nToken); + } + } + + sqlite3_free(aTC); + } + } + + fts3EvalStartReaders(pCsr, pExpr, bOptOk, &rc); + return rc; +} + +static void fts3EvalZeroPoslist(Fts3Phrase *pPhrase){ + if( pPhrase->doclist.bFreeList ){ + sqlite3_free(pPhrase->doclist.pList); + } + pPhrase->doclist.pList = 0; + pPhrase->doclist.nList = 0; + pPhrase->doclist.bFreeList = 0; +} + +static int fts3EvalNearTrim2( + int nNear, + char *aTmp, /* Temporary space to use */ + char **paPoslist, /* IN/OUT: Position list */ + int *pnToken, /* IN/OUT: Tokens in phrase of *paPoslist */ + Fts3Phrase *pPhrase /* The phrase object to trim the doclist of */ +){ + int nParam1 = nNear + pPhrase->nToken; + int nParam2 = nNear + *pnToken; + int nNew; + char *p2; + char *pOut; + int res; + + assert( pPhrase->doclist.pList ); + + p2 = pOut = pPhrase->doclist.pList; + res = fts3PoslistNearMerge( + &pOut, aTmp, nParam1, nParam2, paPoslist, &p2 + ); + if( res ){ + nNew = (pOut - pPhrase->doclist.pList) - 1; + assert( pPhrase->doclist.pList[nNew]=='\0' ); + assert( nNew<=pPhrase->doclist.nList && nNew>0 ); + memset(&pPhrase->doclist.pList[nNew], 0, pPhrase->doclist.nList - nNew); + pPhrase->doclist.nList = nNew; + *paPoslist = pPhrase->doclist.pList; + *pnToken = pPhrase->nToken; + } + + return res; +} + +static int fts3EvalNearTest(Fts3Expr *pExpr, int *pRc){ + int res = 1; + + /* The following block runs if pExpr is the root of a NEAR query. + ** For example, the query: + ** + ** "w" NEAR "x" NEAR "y" NEAR "z" + ** + ** which is represented in tree form as: + ** + ** | + ** +--NEAR--+ <-- root of NEAR query + ** | | + ** +--NEAR--+ "z" + ** | | + ** +--NEAR--+ "y" + ** | | + ** "w" "x" + ** + ** The right-hand child of a NEAR node is always a phrase. The + ** left-hand child may be either a phrase or a NEAR node. There are + ** no exceptions to this. + */ + if( *pRc==SQLITE_OK + && pExpr->eType==FTSQUERY_NEAR + && pExpr->bEof==0 + && (pExpr->pParent==0 || pExpr->pParent->eType!=FTSQUERY_NEAR) + ){ + Fts3Expr *p; + int nTmp = 0; /* Bytes of temp space */ + char *aTmp; /* Temp space for PoslistNearMerge() */ + + /* Allocate temporary working space. */ + for(p=pExpr; p->pLeft; p=p->pLeft){ + nTmp += p->pRight->pPhrase->doclist.nList; + } + nTmp += p->pPhrase->doclist.nList; + aTmp = sqlite3_malloc(nTmp*2); + if( !aTmp ){ + *pRc = SQLITE_NOMEM; + res = 0; + }else{ + char *aPoslist = p->pPhrase->doclist.pList; + int nToken = p->pPhrase->nToken; + + for(p=p->pParent;res && p && p->eType==FTSQUERY_NEAR; p=p->pParent){ + Fts3Phrase *pPhrase = p->pRight->pPhrase; + int nNear = p->nNear; + res = fts3EvalNearTrim2(nNear, aTmp, &aPoslist, &nToken, pPhrase); + } + + aPoslist = pExpr->pRight->pPhrase->doclist.pList; + nToken = pExpr->pRight->pPhrase->nToken; + for(p=pExpr->pLeft; p && res; p=p->pLeft){ + int nNear = p->pParent->nNear; + Fts3Phrase *pPhrase = ( + p->eType==FTSQUERY_NEAR ? p->pRight->pPhrase : p->pPhrase + ); + res = fts3EvalNearTrim2(nNear, aTmp, &aPoslist, &nToken, pPhrase); + } + } + + sqlite3_free(aTmp); + } + + return res; +} + +/* +** This macro is used by the fts3EvalNext() function. The two arguments are +** 64-bit docid values. If the current query is "ORDER BY docid ASC", then +** the macro returns (i1 - i2). Or if it is "ORDER BY docid DESC", then +** it returns (i2 - i1). This allows the same code to be used for merging +** doclists in ascending or descending order. +*/ +#define DOCID_CMP(i1, i2) ((pCsr->bDesc?-1:1) * (i1-i2)) + +static void fts3EvalNext( + Fts3Cursor *pCsr, + Fts3Expr *pExpr, + int *pRc +){ + if( *pRc==SQLITE_OK ){ + assert( pExpr->bEof==0 ); + pExpr->bStart = 1; + + switch( pExpr->eType ){ + case FTSQUERY_NEAR: + case FTSQUERY_AND: { + Fts3Expr *pLeft = pExpr->pLeft; + Fts3Expr *pRight = pExpr->pRight; + assert( !pLeft->bDeferred || !pRight->bDeferred ); + if( pLeft->bDeferred ){ + fts3EvalNext(pCsr, pRight, pRc); + pExpr->iDocid = pRight->iDocid; + pExpr->bEof = pRight->bEof; + }else if( pRight->bDeferred ){ + fts3EvalNext(pCsr, pLeft, pRc); + pExpr->iDocid = pLeft->iDocid; + pExpr->bEof = pLeft->bEof; + }else{ + fts3EvalNext(pCsr, pLeft, pRc); + fts3EvalNext(pCsr, pRight, pRc); + + while( !pLeft->bEof && !pRight->bEof && *pRc==SQLITE_OK ){ + sqlite3_int64 iDiff = DOCID_CMP(pLeft->iDocid, pRight->iDocid); + if( iDiff==0 ) break; + if( iDiff<0 ){ + fts3EvalNext(pCsr, pLeft, pRc); + }else{ + fts3EvalNext(pCsr, pRight, pRc); + } + } + + pExpr->iDocid = pLeft->iDocid; + pExpr->bEof = (pLeft->bEof || pRight->bEof); + } + break; + } + + case FTSQUERY_OR: { + Fts3Expr *pLeft = pExpr->pLeft; + Fts3Expr *pRight = pExpr->pRight; + sqlite3_int64 iCmp = DOCID_CMP(pLeft->iDocid, pRight->iDocid); + + assert( pLeft->bStart || pLeft->iDocid==pRight->iDocid ); + assert( pRight->bStart || pLeft->iDocid==pRight->iDocid ); + + if( pRight->bEof || (pLeft->bEof==0 && iCmp<0) ){ + fts3EvalNext(pCsr, pLeft, pRc); + }else if( pLeft->bEof || (pRight->bEof==0 && iCmp>0) ){ + fts3EvalNext(pCsr, pRight, pRc); + }else{ + fts3EvalNext(pCsr, pLeft, pRc); + fts3EvalNext(pCsr, pRight, pRc); + } + + pExpr->bEof = (pLeft->bEof && pRight->bEof); + iCmp = DOCID_CMP(pLeft->iDocid, pRight->iDocid); + if( pRight->bEof || (pLeft->bEof==0 && iCmp<0) ){ + pExpr->iDocid = pLeft->iDocid; + }else{ + pExpr->iDocid = pRight->iDocid; + } + + break; + } + + case FTSQUERY_NOT: { + Fts3Expr *pLeft = pExpr->pLeft; + Fts3Expr *pRight = pExpr->pRight; + + if( pRight->bStart==0 ){ + fts3EvalNext(pCsr, pRight, pRc); + assert( *pRc!=SQLITE_OK || pRight->bStart ); + } + + fts3EvalNext(pCsr, pLeft, pRc); + if( pLeft->bEof==0 ){ + while( !*pRc + && !pRight->bEof + && DOCID_CMP(pLeft->iDocid, pRight->iDocid)>0 + ){ + fts3EvalNext(pCsr, pRight, pRc); + } + } + pExpr->iDocid = pLeft->iDocid; + pExpr->bEof = pLeft->bEof; + break; + } + + default: { + Fts3Phrase *pPhrase = pExpr->pPhrase; + fts3EvalZeroPoslist(pPhrase); + *pRc = fts3EvalPhraseNext(pCsr, pPhrase, &pExpr->bEof); + pExpr->iDocid = pPhrase->doclist.iDocid; + break; + } + } + } +} + +static int fts3EvalDeferredTest(Fts3Cursor *pCsr, Fts3Expr *pExpr, int *pRc){ + int bHit = 1; + if( *pRc==SQLITE_OK ){ + switch( pExpr->eType ){ + case FTSQUERY_NEAR: + case FTSQUERY_AND: + bHit = ( + fts3EvalDeferredTest(pCsr, pExpr->pLeft, pRc) + && fts3EvalDeferredTest(pCsr, pExpr->pRight, pRc) + && fts3EvalNearTest(pExpr, pRc) + ); + + /* If the NEAR expression does not match any rows, zero the doclist for + ** all phrases involved in the NEAR. This is because the snippet(), + ** offsets() and matchinfo() functions are not supposed to recognize + ** any instances of phrases that are part of unmatched NEAR queries. + ** For example if this expression: + ** + ** ... MATCH 'a OR (b NEAR c)' + ** + ** is matched against a row containing: + ** + ** 'a b d e' + ** + ** then any snippet() should ony highlight the "a" term, not the "b" + ** (as "b" is part of a non-matching NEAR clause). + */ + if( bHit==0 + && pExpr->eType==FTSQUERY_NEAR + && (pExpr->pParent==0 || pExpr->pParent->eType!=FTSQUERY_NEAR) + ){ + Fts3Expr *p; + for(p=pExpr; p->pPhrase==0; p=p->pLeft){ + if( p->pRight->iDocid==pCsr->iPrevId ){ + fts3EvalZeroPoslist(p->pRight->pPhrase); + } + } + if( p->iDocid==pCsr->iPrevId ){ + fts3EvalZeroPoslist(p->pPhrase); + } + } + + break; + + case FTSQUERY_OR: { + int bHit1 = fts3EvalDeferredTest(pCsr, pExpr->pLeft, pRc); + int bHit2 = fts3EvalDeferredTest(pCsr, pExpr->pRight, pRc); + bHit = bHit1 || bHit2; + break; + } + + case FTSQUERY_NOT: + bHit = ( + fts3EvalDeferredTest(pCsr, pExpr->pLeft, pRc) + && !fts3EvalDeferredTest(pCsr, pExpr->pRight, pRc) + ); + break; + + default: { + if( pCsr->pDeferred + && (pExpr->iDocid==pCsr->iPrevId || pExpr->bDeferred) + ){ + Fts3Phrase *pPhrase = pExpr->pPhrase; + assert( pExpr->bDeferred || pPhrase->doclist.bFreeList==0 ); + if( pExpr->bDeferred ){ + fts3EvalZeroPoslist(pPhrase); + } + *pRc = fts3EvalDeferredPhrase(pCsr, pPhrase); + bHit = (pPhrase->doclist.pList!=0); + pExpr->iDocid = pCsr->iPrevId; + }else{ + bHit = (pExpr->bEof==0 && pExpr->iDocid==pCsr->iPrevId); + } + break; + } + } + } + return bHit; +} + +/* +** Return 1 if both of the following are true: +** +** 1. *pRc is SQLITE_OK when this function returns, and +** +** 2. After scanning the current FTS table row for the deferred tokens, +** it is determined that the row does not match the query. +** +** Or, if no error occurs and it seems the current row does match the FTS +** query, return 0. +*/ +static int fts3EvalLoadDeferred(Fts3Cursor *pCsr, int *pRc){ + int rc = *pRc; + int bMiss = 0; + if( rc==SQLITE_OK ){ + if( pCsr->pDeferred ){ + rc = fts3CursorSeek(0, pCsr); + if( rc==SQLITE_OK ){ + rc = sqlite3Fts3CacheDeferredDoclists(pCsr); + } + } + bMiss = (0==fts3EvalDeferredTest(pCsr, pCsr->pExpr, &rc)); + sqlite3Fts3FreeDeferredDoclists(pCsr); + *pRc = rc; + } + return (rc==SQLITE_OK && bMiss); +} + +/* +** Advance to the next document that matches the FTS expression in +** Fts3Cursor.pExpr. +*/ +SQLITE_PRIVATE int sqlite3Fts3EvalNext(Fts3Cursor *pCsr){ + int rc = SQLITE_OK; /* Return Code */ + Fts3Expr *pExpr = pCsr->pExpr; + assert( pCsr->isEof==0 ); + if( pExpr==0 ){ + pCsr->isEof = 1; + }else{ + do { + if( pCsr->isRequireSeek==0 ){ + sqlite3_reset(pCsr->pStmt); + } + assert( sqlite3_data_count(pCsr->pStmt)==0 ); + fts3EvalNext(pCsr, pExpr, &rc); + pCsr->isEof = pExpr->bEof; + pCsr->isRequireSeek = 1; + pCsr->isMatchinfoNeeded = 1; + pCsr->iPrevId = pExpr->iDocid; + }while( pCsr->isEof==0 && fts3EvalLoadDeferred(pCsr, &rc) ); + } + return rc; +} + +/* +** Restart interation for expression pExpr so that the next call to +** sqlite3Fts3EvalNext() visits the first row. Do not allow incremental +** loading or merging of phrase doclists for this iteration. +** +** If *pRc is other than SQLITE_OK when this function is called, it is +** a no-op. If an error occurs within this function, *pRc is set to an +** SQLite error code before returning. +*/ +static void fts3EvalRestart( + Fts3Cursor *pCsr, + Fts3Expr *pExpr, + int *pRc +){ + if( pExpr && *pRc==SQLITE_OK ){ + Fts3Phrase *pPhrase = pExpr->pPhrase; + + if( pPhrase ){ + fts3EvalZeroPoslist(pPhrase); + if( pPhrase->bIncr ){ + assert( pPhrase->nToken==1 ); + assert( pPhrase->aToken[0].pSegcsr ); + sqlite3Fts3MsrIncrRestart(pPhrase->aToken[0].pSegcsr); + *pRc = fts3EvalPhraseStart(pCsr, 0, pPhrase); + } + + pPhrase->doclist.pNextDocid = 0; + pPhrase->doclist.iDocid = 0; + } + + pExpr->iDocid = 0; + pExpr->bEof = 0; + pExpr->bStart = 0; + + fts3EvalRestart(pCsr, pExpr->pLeft, pRc); + fts3EvalRestart(pCsr, pExpr->pRight, pRc); + } +} + +/* +** After allocating the Fts3Expr.aMI[] array for each phrase in the +** expression rooted at pExpr, the cursor iterates through all rows matched +** by pExpr, calling this function for each row. This function increments +** the values in Fts3Expr.aMI[] according to the position-list currently +** found in Fts3Expr.pPhrase->doclist.pList for each of the phrase +** expression nodes. +*/ +static void fts3EvalUpdateCounts(Fts3Expr *pExpr){ + if( pExpr ){ + Fts3Phrase *pPhrase = pExpr->pPhrase; + if( pPhrase && pPhrase->doclist.pList ){ + int iCol = 0; + char *p = pPhrase->doclist.pList; + + assert( *p ); + while( 1 ){ + u8 c = 0; + int iCnt = 0; + while( 0xFE & (*p | c) ){ + if( (c&0x80)==0 ) iCnt++; + c = *p++ & 0x80; + } + + /* aMI[iCol*3 + 1] = Number of occurrences + ** aMI[iCol*3 + 2] = Number of rows containing at least one instance + */ + pExpr->aMI[iCol*3 + 1] += iCnt; + pExpr->aMI[iCol*3 + 2] += (iCnt>0); + if( *p==0x00 ) break; + p++; + p += sqlite3Fts3GetVarint32(p, &iCol); + } + } + + fts3EvalUpdateCounts(pExpr->pLeft); + fts3EvalUpdateCounts(pExpr->pRight); + } +} + +/* +** Expression pExpr must be of type FTSQUERY_PHRASE. +** +** If it is not already allocated and populated, this function allocates and +** populates the Fts3Expr.aMI[] array for expression pExpr. If pExpr is part +** of a NEAR expression, then it also allocates and populates the same array +** for all other phrases that are part of the NEAR expression. +** +** SQLITE_OK is returned if the aMI[] array is successfully allocated and +** populated. Otherwise, if an error occurs, an SQLite error code is returned. +*/ +static int fts3EvalGatherStats( + Fts3Cursor *pCsr, /* Cursor object */ + Fts3Expr *pExpr /* FTSQUERY_PHRASE expression */ +){ + int rc = SQLITE_OK; /* Return code */ + + assert( pExpr->eType==FTSQUERY_PHRASE ); + if( pExpr->aMI==0 ){ + Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab; + Fts3Expr *pRoot; /* Root of NEAR expression */ + Fts3Expr *p; /* Iterator used for several purposes */ + + sqlite3_int64 iPrevId = pCsr->iPrevId; + sqlite3_int64 iDocid; + u8 bEof; + + /* Find the root of the NEAR expression */ + pRoot = pExpr; + while( pRoot->pParent && pRoot->pParent->eType==FTSQUERY_NEAR ){ + pRoot = pRoot->pParent; + } + iDocid = pRoot->iDocid; + bEof = pRoot->bEof; + assert( pRoot->bStart ); + + /* Allocate space for the aMSI[] array of each FTSQUERY_PHRASE node */ + for(p=pRoot; p; p=p->pLeft){ + Fts3Expr *pE = (p->eType==FTSQUERY_PHRASE?p:p->pRight); + assert( pE->aMI==0 ); + pE->aMI = (u32 *)sqlite3_malloc(pTab->nColumn * 3 * sizeof(u32)); + if( !pE->aMI ) return SQLITE_NOMEM; + memset(pE->aMI, 0, pTab->nColumn * 3 * sizeof(u32)); + } + + fts3EvalRestart(pCsr, pRoot, &rc); + + while( pCsr->isEof==0 && rc==SQLITE_OK ){ + + do { + /* Ensure the %_content statement is reset. */ + if( pCsr->isRequireSeek==0 ) sqlite3_reset(pCsr->pStmt); + assert( sqlite3_data_count(pCsr->pStmt)==0 ); + + /* Advance to the next document */ + fts3EvalNext(pCsr, pRoot, &rc); + pCsr->isEof = pRoot->bEof; + pCsr->isRequireSeek = 1; + pCsr->isMatchinfoNeeded = 1; + pCsr->iPrevId = pRoot->iDocid; + }while( pCsr->isEof==0 + && pRoot->eType==FTSQUERY_NEAR + && fts3EvalLoadDeferred(pCsr, &rc) + ); + + if( rc==SQLITE_OK && pCsr->isEof==0 ){ + fts3EvalUpdateCounts(pRoot); + } + } + + pCsr->isEof = 0; + pCsr->iPrevId = iPrevId; + + if( bEof ){ + pRoot->bEof = bEof; + }else{ + /* Caution: pRoot may iterate through docids in ascending or descending + ** order. For this reason, even though it seems more defensive, the + ** do loop can not be written: + ** + ** do {...} while( pRoot->iDocid<iDocid && rc==SQLITE_OK ); + */ + fts3EvalRestart(pCsr, pRoot, &rc); + do { + fts3EvalNext(pCsr, pRoot, &rc); + assert( pRoot->bEof==0 ); + }while( pRoot->iDocid!=iDocid && rc==SQLITE_OK ); + fts3EvalLoadDeferred(pCsr, &rc); + } + } + return rc; +} + +/* +** This function is used by the matchinfo() module to query a phrase +** expression node for the following information: +** +** 1. The total number of occurrences of the phrase in each column of +** the FTS table (considering all rows), and +** +** 2. For each column, the number of rows in the table for which the +** column contains at least one instance of the phrase. +** +** If no error occurs, SQLITE_OK is returned and the values for each column +** written into the array aiOut as follows: +** +** aiOut[iCol*3 + 1] = Number of occurrences +** aiOut[iCol*3 + 2] = Number of rows containing at least one instance +** +** Caveats: +** +** * If a phrase consists entirely of deferred tokens, then all output +** values are set to the number of documents in the table. In other +** words we assume that very common tokens occur exactly once in each +** column of each row of the table. +** +** * If a phrase contains some deferred tokens (and some non-deferred +** tokens), count the potential occurrence identified by considering +** the non-deferred tokens instead of actual phrase occurrences. +** +** * If the phrase is part of a NEAR expression, then only phrase instances +** that meet the NEAR constraint are included in the counts. +*/ +SQLITE_PRIVATE int sqlite3Fts3EvalPhraseStats( + Fts3Cursor *pCsr, /* FTS cursor handle */ + Fts3Expr *pExpr, /* Phrase expression */ + u32 *aiOut /* Array to write results into (see above) */ +){ + Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab; + int rc = SQLITE_OK; + int iCol; + + if( pExpr->bDeferred && pExpr->pParent->eType!=FTSQUERY_NEAR ){ + assert( pCsr->nDoc>0 ); + for(iCol=0; iCol<pTab->nColumn; iCol++){ + aiOut[iCol*3 + 1] = (u32)pCsr->nDoc; + aiOut[iCol*3 + 2] = (u32)pCsr->nDoc; + } + }else{ + rc = fts3EvalGatherStats(pCsr, pExpr); + if( rc==SQLITE_OK ){ + assert( pExpr->aMI ); + for(iCol=0; iCol<pTab->nColumn; iCol++){ + aiOut[iCol*3 + 1] = pExpr->aMI[iCol*3 + 1]; + aiOut[iCol*3 + 2] = pExpr->aMI[iCol*3 + 2]; + } + } + } + + return rc; +} + +/* +** The expression pExpr passed as the second argument to this function +** must be of type FTSQUERY_PHRASE. +** +** The returned value is either NULL or a pointer to a buffer containing +** a position-list indicating the occurrences of the phrase in column iCol +** of the current row. +** +** More specifically, the returned buffer contains 1 varint for each +** occurence of the phrase in the column, stored using the normal (delta+2) +** compression and is terminated by either an 0x01 or 0x00 byte. For example, +** if the requested column contains "a b X c d X X" and the position-list +** for 'X' is requested, the buffer returned may contain: +** +** 0x04 0x05 0x03 0x01 or 0x04 0x05 0x03 0x00 +** +** This function works regardless of whether or not the phrase is deferred, +** incremental, or neither. +*/ +SQLITE_PRIVATE char *sqlite3Fts3EvalPhrasePoslist( + Fts3Cursor *pCsr, /* FTS3 cursor object */ + Fts3Expr *pExpr, /* Phrase to return doclist for */ + int iCol /* Column to return position list for */ +){ + Fts3Phrase *pPhrase = pExpr->pPhrase; + Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab; + char *pIter = pPhrase->doclist.pList; + int iThis; + + assert( iCol>=0 && iCol<pTab->nColumn ); + if( !pIter + || pExpr->bEof + || pExpr->iDocid!=pCsr->iPrevId + || (pPhrase->iColumn<pTab->nColumn && pPhrase->iColumn!=iCol) + ){ + return 0; + } + + assert( pPhrase->doclist.nList>0 ); + if( *pIter==0x01 ){ + pIter++; + pIter += sqlite3Fts3GetVarint32(pIter, &iThis); + }else{ + iThis = 0; + } + while( iThis<iCol ){ + fts3ColumnlistCopy(0, &pIter); + if( *pIter==0x00 ) return 0; + pIter++; + pIter += sqlite3Fts3GetVarint32(pIter, &iThis); + } + + return ((iCol==iThis)?pIter:0); +} + +/* +** Free all components of the Fts3Phrase structure that were allocated by +** the eval module. Specifically, this means to free: +** +** * the contents of pPhrase->doclist, and +** * any Fts3MultiSegReader objects held by phrase tokens. +*/ +SQLITE_PRIVATE void sqlite3Fts3EvalPhraseCleanup(Fts3Phrase *pPhrase){ + if( pPhrase ){ + int i; + sqlite3_free(pPhrase->doclist.aAll); + fts3EvalZeroPoslist(pPhrase); + memset(&pPhrase->doclist, 0, sizeof(Fts3Doclist)); + for(i=0; i<pPhrase->nToken; i++){ + fts3SegReaderCursorFree(pPhrase->aToken[i].pSegcsr); + pPhrase->aToken[i].pSegcsr = 0; + } + } +} + #endif /************** End of fts3.c ************************************************/ @@ -114481,7 +116446,6 @@ SQLITE_API int sqlite3_extension_init( ****************************************************************************** ** */ - #if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3) @@ -114495,7 +116459,7 @@ struct Fts3auxTable { struct Fts3auxCursor { sqlite3_vtab_cursor base; /* Base class used by SQLite core */ - Fts3SegReaderCursor csr; /* Must be right after "base" */ + Fts3MultiSegReader csr; /* Must be right after "base" */ Fts3SegFilter filter; char *zStop; int nStop; /* Byte-length of string zStop */ @@ -114563,6 +116527,7 @@ static int fts3auxConnectMethod( p->pFts3Tab->zDb = (char *)&p->pFts3Tab[1]; p->pFts3Tab->zName = &p->pFts3Tab->zDb[nDb+1]; p->pFts3Tab->db = db; + p->pFts3Tab->nIndex = 1; memcpy((char *)p->pFts3Tab->zDb, zDb, nDb); memcpy((char *)p->pFts3Tab->zName, zFts3, nFts3); @@ -114809,6 +116774,7 @@ static int fts3auxFilterMethod( int isScan; UNUSED_PARAMETER(nVal); + UNUSED_PARAMETER(idxStr); assert( idxStr==0 ); assert( idxNum==FTS4AUX_EQ_CONSTRAINT || idxNum==0 @@ -114842,7 +116808,7 @@ static int fts3auxFilterMethod( if( pCsr->zStop==0 ) return SQLITE_NOMEM; } - rc = sqlite3Fts3SegReaderCursor(pFts3, FTS3_SEGCURSOR_ALL, + rc = sqlite3Fts3SegReaderCursor(pFts3, 0, FTS3_SEGCURSOR_ALL, pCsr->filter.zTerm, pCsr->filter.nTerm, 0, isScan, &pCsr->csr ); if( rc==SQLITE_OK ){ @@ -114926,7 +116892,10 @@ SQLITE_PRIVATE int sqlite3Fts3InitAux(sqlite3 *db){ 0, /* xCommit */ 0, /* xRollback */ 0, /* xFindFunction */ - 0 /* xRename */ + 0, /* xRename */ + 0, /* xSavepoint */ + 0, /* xRelease */ + 0 /* xRollbackTo */ }; int rc; /* Return code */ @@ -115018,12 +116987,21 @@ SQLITE_API int sqlite3_fts3_enable_parentheses = 0; #define SQLITE_FTS3_DEFAULT_NEAR_PARAM 10 +/* +** isNot: +** This variable is used by function getNextNode(). When getNextNode() is +** called, it sets ParseContext.isNot to true if the 'next node' is a +** FTSQUERY_PHRASE with a unary "-" attached to it. i.e. "mysql" in the +** FTS3 query "sqlite -mysql". Otherwise, ParseContext.isNot is set to +** zero. +*/ typedef struct ParseContext ParseContext; struct ParseContext { sqlite3_tokenizer *pTokenizer; /* Tokenizer module */ const char **azCol; /* Array of column names for fts3 table */ int nCol; /* Number of entries in azCol[] */ int iDefaultCol; /* Default column to query */ + int isNot; /* True if getNextNode() sees a unary - */ sqlite3_context *pCtx; /* Write error message here */ int nNest; /* Number of nested brackets */ }; @@ -115109,7 +117087,7 @@ static int getNextToken( iEnd++; } if( !sqlite3_fts3_enable_parentheses && iStart>0 && z[iStart-1]=='-' ){ - pRet->pPhrase->isNot = 1; + pParse->isNot = 1; } } nConsumed = iEnd; @@ -115161,36 +117139,55 @@ static int getNextString( char *zTemp = 0; int nTemp = 0; + const int nSpace = sizeof(Fts3Expr) + sizeof(Fts3Phrase); + int nToken = 0; + + /* The final Fts3Expr data structure, including the Fts3Phrase, + ** Fts3PhraseToken structures token buffers are all stored as a single + ** allocation so that the expression can be freed with a single call to + ** sqlite3_free(). Setting this up requires a two pass approach. + ** + ** The first pass, in the block below, uses a tokenizer cursor to iterate + ** through the tokens in the expression. This pass uses fts3ReallocOrFree() + ** to assemble data in two dynamic buffers: + ** + ** Buffer p: Points to the Fts3Expr structure, followed by the Fts3Phrase + ** structure, followed by the array of Fts3PhraseToken + ** structures. This pass only populates the Fts3PhraseToken array. + ** + ** Buffer zTemp: Contains copies of all tokens. + ** + ** The second pass, in the block that begins "if( rc==SQLITE_DONE )" below, + ** appends buffer zTemp to buffer p, and fills in the Fts3Expr and Fts3Phrase + ** structures. + */ rc = pModule->xOpen(pTokenizer, zInput, nInput, &pCursor); if( rc==SQLITE_OK ){ int ii; pCursor->pTokenizer = pTokenizer; for(ii=0; rc==SQLITE_OK; ii++){ - const char *zToken; - int nToken, iBegin, iEnd, iPos; - rc = pModule->xNext(pCursor, &zToken, &nToken, &iBegin, &iEnd, &iPos); + const char *zByte; + int nByte, iBegin, iEnd, iPos; + rc = pModule->xNext(pCursor, &zByte, &nByte, &iBegin, &iEnd, &iPos); if( rc==SQLITE_OK ){ - int nByte = sizeof(Fts3Expr) + sizeof(Fts3Phrase); - p = fts3ReallocOrFree(p, nByte+ii*sizeof(Fts3PhraseToken)); - zTemp = fts3ReallocOrFree(zTemp, nTemp + nToken); - if( !p || !zTemp ){ - goto no_mem; - } - if( ii==0 ){ - memset(p, 0, nByte); - p->pPhrase = (Fts3Phrase *)&p[1]; - } - p->pPhrase = (Fts3Phrase *)&p[1]; - memset(&p->pPhrase->aToken[ii], 0, sizeof(Fts3PhraseToken)); - p->pPhrase->nToken = ii+1; - p->pPhrase->aToken[ii].n = nToken; - memcpy(&zTemp[nTemp], zToken, nToken); - nTemp += nToken; - if( iEnd<nInput && zInput[iEnd]=='*' ){ - p->pPhrase->aToken[ii].isPrefix = 1; - }else{ - p->pPhrase->aToken[ii].isPrefix = 0; - } + Fts3PhraseToken *pToken; + + p = fts3ReallocOrFree(p, nSpace + ii*sizeof(Fts3PhraseToken)); + if( !p ) goto no_mem; + + zTemp = fts3ReallocOrFree(zTemp, nTemp + nByte); + if( !zTemp ) goto no_mem; + + assert( nToken==ii ); + pToken = &((Fts3Phrase *)(&p[1]))->aToken[ii]; + memset(pToken, 0, sizeof(Fts3PhraseToken)); + + memcpy(&zTemp[nTemp], zByte, nByte); + nTemp += nByte; + + pToken->n = nByte; + pToken->isPrefix = (iEnd<nInput && zInput[iEnd]=='*'); + nToken = ii+1; } } @@ -115200,28 +117197,24 @@ static int getNextString( if( rc==SQLITE_DONE ){ int jj; - char *zNew = NULL; - int nNew = 0; - int nByte = sizeof(Fts3Expr) + sizeof(Fts3Phrase); - nByte += (p?(p->pPhrase->nToken-1):0) * sizeof(Fts3PhraseToken); - p = fts3ReallocOrFree(p, nByte + nTemp); - if( !p ){ - goto no_mem; - } - if( zTemp ){ - zNew = &(((char *)p)[nByte]); - memcpy(zNew, zTemp, nTemp); - }else{ - memset(p, 0, nByte+nTemp); - } + char *zBuf = 0; + + p = fts3ReallocOrFree(p, nSpace + nToken*sizeof(Fts3PhraseToken) + nTemp); + if( !p ) goto no_mem; + memset(p, 0, (char *)&(((Fts3Phrase *)&p[1])->aToken[0])-(char *)p); + p->eType = FTSQUERY_PHRASE; p->pPhrase = (Fts3Phrase *)&p[1]; + p->pPhrase->iColumn = pParse->iDefaultCol; + p->pPhrase->nToken = nToken; + + zBuf = (char *)&p->pPhrase->aToken[nToken]; + memcpy(zBuf, zTemp, nTemp); + sqlite3_free(zTemp); + for(jj=0; jj<p->pPhrase->nToken; jj++){ - p->pPhrase->aToken[jj].z = &zNew[nNew]; - nNew += p->pPhrase->aToken[jj].n; + p->pPhrase->aToken[jj].z = zBuf; + zBuf += p->pPhrase->aToken[jj].n; } - sqlite3_free(zTemp); - p->eType = FTSQUERY_PHRASE; - p->pPhrase->iColumn = pParse->iDefaultCol; rc = SQLITE_OK; } @@ -115278,6 +117271,8 @@ static int getNextNode( const char *zInput = z; int nInput = n; + pParse->isNot = 0; + /* Skip over any whitespace before checking for a keyword, an open or ** close bracket, or a quoted string. */ @@ -115496,7 +117491,7 @@ static int fts3ExprParse( int isPhrase; if( !sqlite3_fts3_enable_parentheses - && p->eType==FTSQUERY_PHRASE && p->pPhrase->isNot + && p->eType==FTSQUERY_PHRASE && pParse->isNot ){ /* Create an implicit NOT operator. */ Fts3Expr *pNot = fts3MallocZero(sizeof(Fts3Expr)); @@ -115514,7 +117509,6 @@ static int fts3ExprParse( p = pPrev; }else{ int eType = p->eType; - assert( eType!=FTSQUERY_PHRASE || !p->pPhrase->isNot ); isPhrase = (eType==FTSQUERY_PHRASE || p->pLeft); /* The isRequirePhrase variable is set to true if a phrase or @@ -115677,9 +117671,11 @@ SQLITE_PRIVATE int sqlite3Fts3ExprParse( */ SQLITE_PRIVATE void sqlite3Fts3ExprFree(Fts3Expr *p){ if( p ){ + assert( p->eType==FTSQUERY_PHRASE || p->pPhrase==0 ); sqlite3Fts3ExprFree(p->pLeft); sqlite3Fts3ExprFree(p->pRight); - sqlite3_free(p->aDoclist); + sqlite3Fts3EvalPhraseCleanup(p->pPhrase); + sqlite3_free(p->aMI); sqlite3_free(p); } } @@ -115736,7 +117732,7 @@ static char *exprToString(Fts3Expr *pExpr, char *zBuf){ Fts3Phrase *pPhrase = pExpr->pPhrase; int i; zBuf = sqlite3_mprintf( - "%zPHRASE %d %d", zBuf, pPhrase->iColumn, pPhrase->isNot); + "%zPHRASE %d 0", zBuf, pPhrase->iColumn); for(i=0; zBuf && i<pPhrase->nToken; i++){ zBuf = sqlite3_mprintf("%z %.*s%s", zBuf, pPhrase->aToken[i].n, pPhrase->aToken[i].z, @@ -116283,7 +118279,6 @@ SQLITE_PRIVATE void *sqlite3Fts3HashInsert( - /* ** Class derived from sqlite3_tokenizer */ @@ -116923,12 +118918,12 @@ SQLITE_PRIVATE void sqlite3Fts3PorterTokenizerModule( ** * The FTS3 module is being built into the core of ** SQLite (in which case SQLITE_ENABLE_FTS3 is defined). */ -#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3) - #ifndef SQLITE_CORE SQLITE_EXTENSION_INIT1 #endif +#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3) + /* ** Implementation of the SQL scalar function for accessing the underlying @@ -117052,7 +119047,7 @@ SQLITE_PRIVATE int sqlite3Fts3InitTokenizer( ){ int rc; char *z = (char *)zArg; - int n; + int n = 0; char *zCopy; char *zEnd; /* Pointer to nul-term of zCopy */ sqlite3_tokenizer_module *m; @@ -117417,7 +119412,6 @@ SQLITE_PRIVATE int sqlite3Fts3InitHashTable( - typedef struct simple_tokenizer { sqlite3_tokenizer base; char delim[128]; /* flag ASCII delimiters */ @@ -117654,14 +119648,40 @@ SQLITE_PRIVATE void sqlite3Fts3SimpleTokenizerModule( */ #define FTS3_NODE_PADDING (FTS3_VARINT_MAX*2) +/* +** Under certain circumstances, b-tree nodes (doclists) can be loaded into +** memory incrementally instead of all at once. This can be a big performance +** win (reduced IO and CPU) if SQLite stops calling the virtual table xNext() +** method before retrieving all query results (as may happen, for example, +** if a query has a LIMIT clause). +** +** Incremental loading is used for b-tree nodes FTS3_NODE_CHUNK_THRESHOLD +** bytes and larger. Nodes are loaded in chunks of FTS3_NODE_CHUNKSIZE bytes. +** The code is written so that the hard lower-limit for each of these values +** is 1. Clearly such small values would be inefficient, but can be useful +** for testing purposes. +** +** If this module is built with SQLITE_TEST defined, these constants may +** be overridden at runtime for testing purposes. File fts3_test.c contains +** a Tcl interface to read and write the values. +*/ +#ifdef SQLITE_TEST +int test_fts3_node_chunksize = (4*1024); +int test_fts3_node_chunk_threshold = (4*1024)*4; +# define FTS3_NODE_CHUNKSIZE test_fts3_node_chunksize +# define FTS3_NODE_CHUNK_THRESHOLD test_fts3_node_chunk_threshold +#else +# define FTS3_NODE_CHUNKSIZE (4*1024) +# define FTS3_NODE_CHUNK_THRESHOLD (FTS3_NODE_CHUNKSIZE*4) +#endif + typedef struct PendingList PendingList; typedef struct SegmentNode SegmentNode; typedef struct SegmentWriter SegmentWriter; /* -** Data structure used while accumulating terms in the pending-terms hash -** table. The hash table entry maps from term (a string) to a malloc'd -** instance of this structure. +** An instance of the following data structure is used to build doclists +** incrementally. See function fts3PendingListAppend() for details. */ struct PendingList { int nData; @@ -117692,7 +119712,6 @@ struct Fts3DeferredToken { ** ** sqlite3Fts3SegReaderNew() ** sqlite3Fts3SegReaderFree() -** sqlite3Fts3SegReaderCost() ** sqlite3Fts3SegReaderIterate() ** ** Methods used to manipulate Fts3SegReader structures: @@ -117711,6 +119730,9 @@ struct Fts3SegReader { char *aNode; /* Pointer to node data (or NULL) */ int nNode; /* Size of buffer at aNode (or 0) */ + int nPopulate; /* If >0, bytes of buffer aNode[] loaded */ + sqlite3_blob *pBlob; /* If not NULL, blob handle to read node */ + Fts3HashElem **ppNextElem; /* Variables set by fts3SegReaderNext(). These may be read directly @@ -117724,8 +119746,11 @@ struct Fts3SegReader { char *aDoclist; /* Pointer to doclist of current entry */ int nDoclist; /* Size of doclist in current entry */ - /* The following variables are used to iterate through the current doclist */ + /* The following variables are used by fts3SegReaderNextDocid() to iterate + ** through the current doclist (aDoclist/nDoclist). + */ char *pOffsetList; + int nOffsetList; /* For descending pending seg-readers only */ sqlite3_int64 iDocid; }; @@ -117763,6 +119788,14 @@ struct SegmentWriter { ** fts3NodeAddTerm() ** fts3NodeWrite() ** fts3NodeFree() +** +** When a b+tree is written to the database (either as a result of a merge +** or the pending-terms table being flushed), leaves are written into the +** database file as soon as they are completely populated. The interior of +** the tree is assembled in memory and written out only once all leaves have +** been populated and stored. This is Ok, as the b+-tree fanout is usually +** very large, meaning that the interior of the tree consumes relatively +** little memory. */ struct SegmentNode { SegmentNode *pParent; /* Parent node (or NULL for root node) */ @@ -117793,10 +119826,10 @@ struct SegmentNode { #define SQL_NEXT_SEGMENTS_ID 10 #define SQL_INSERT_SEGDIR 11 #define SQL_SELECT_LEVEL 12 -#define SQL_SELECT_ALL_LEVEL 13 +#define SQL_SELECT_LEVEL_RANGE 13 #define SQL_SELECT_LEVEL_COUNT 14 -#define SQL_SELECT_SEGDIR_COUNT_MAX 15 -#define SQL_DELETE_SEGDIR_BY_LEVEL 16 +#define SQL_SELECT_SEGDIR_MAX_LEVEL 15 +#define SQL_DELETE_SEGDIR_LEVEL 16 #define SQL_DELETE_SEGMENTS_RANGE 17 #define SQL_CONTENT_INSERT 18 #define SQL_DELETE_DOCSIZE 19 @@ -117805,6 +119838,11 @@ struct SegmentNode { #define SQL_SELECT_DOCTOTAL 22 #define SQL_REPLACE_DOCTOTAL 23 +#define SQL_SELECT_ALL_PREFIX_LEVEL 24 +#define SQL_DELETE_ALL_TERMS_SEGDIR 25 + +#define SQL_DELETE_SEGDIR_RANGE 26 + /* ** This function is used to obtain an SQLite prepared statement handle ** for the statement identified by the second argument. If successful, @@ -117840,10 +119878,11 @@ static int fts3SqlStmt( /* 12 */ "SELECT idx, start_block, leaves_end_block, end_block, root " "FROM %Q.'%q_segdir' WHERE level = ? ORDER BY idx ASC", /* 13 */ "SELECT idx, start_block, leaves_end_block, end_block, root " - "FROM %Q.'%q_segdir' ORDER BY level DESC, idx ASC", + "FROM %Q.'%q_segdir' WHERE level BETWEEN ? AND ?" + "ORDER BY level DESC, idx ASC", /* 14 */ "SELECT count(*) FROM %Q.'%q_segdir' WHERE level = ?", -/* 15 */ "SELECT count(*), max(level) FROM %Q.'%q_segdir'", +/* 15 */ "SELECT max(level) FROM %Q.'%q_segdir' WHERE level BETWEEN ? AND ?", /* 16 */ "DELETE FROM %Q.'%q_segdir' WHERE level = ?", /* 17 */ "DELETE FROM %Q.'%q_segments' WHERE blockid BETWEEN ? AND ?", @@ -117853,6 +119892,11 @@ static int fts3SqlStmt( /* 21 */ "SELECT size FROM %Q.'%q_docsize' WHERE docid=?", /* 22 */ "SELECT value FROM %Q.'%q_stat' WHERE id=0", /* 23 */ "REPLACE INTO %Q.'%q_stat' VALUES(0,?)", +/* 24 */ "", +/* 25 */ "", + +/* 26 */ "DELETE FROM %Q.'%q_segdir' WHERE level BETWEEN ? AND ?", + }; int rc = SQLITE_OK; sqlite3_stmt *pStmt; @@ -117909,7 +119953,7 @@ static int fts3SelectDocsize( rc = sqlite3_step(pStmt); if( rc!=SQLITE_ROW || sqlite3_column_type(pStmt, 0)!=SQLITE_BLOB ){ rc = sqlite3_reset(pStmt); - if( rc==SQLITE_OK ) rc = SQLITE_CORRUPT; + if( rc==SQLITE_OK ) rc = SQLITE_CORRUPT_VTAB; pStmt = 0; }else{ rc = SQLITE_OK; @@ -118008,14 +120052,32 @@ SQLITE_PRIVATE int sqlite3Fts3ReadLock(Fts3Table *p){ ** 3: end_block ** 4: root */ -SQLITE_PRIVATE int sqlite3Fts3AllSegdirs(Fts3Table *p, int iLevel, sqlite3_stmt **ppStmt){ +SQLITE_PRIVATE int sqlite3Fts3AllSegdirs( + Fts3Table *p, /* FTS3 table */ + int iIndex, /* Index for p->aIndex[] */ + int iLevel, /* Level to select */ + sqlite3_stmt **ppStmt /* OUT: Compiled statement */ +){ int rc; sqlite3_stmt *pStmt = 0; + + assert( iLevel==FTS3_SEGCURSOR_ALL || iLevel>=0 ); + assert( iLevel<FTS3_SEGDIR_MAXLEVEL ); + assert( iIndex>=0 && iIndex<p->nIndex ); + if( iLevel<0 ){ - rc = fts3SqlStmt(p, SQL_SELECT_ALL_LEVEL, &pStmt, 0); + /* "SELECT * FROM %_segdir WHERE level BETWEEN ? AND ? ORDER BY ..." */ + rc = fts3SqlStmt(p, SQL_SELECT_LEVEL_RANGE, &pStmt, 0); + if( rc==SQLITE_OK ){ + sqlite3_bind_int(pStmt, 1, iIndex*FTS3_SEGDIR_MAXLEVEL); + sqlite3_bind_int(pStmt, 2, (iIndex+1)*FTS3_SEGDIR_MAXLEVEL-1); + } }else{ + /* "SELECT * FROM %_segdir WHERE level = ? ORDER BY ..." */ rc = fts3SqlStmt(p, SQL_SELECT_LEVEL, &pStmt, 0); - if( rc==SQLITE_OK ) sqlite3_bind_int(pStmt, 1, iLevel); + if( rc==SQLITE_OK ){ + sqlite3_bind_int(pStmt, 1, iLevel+iIndex*FTS3_SEGDIR_MAXLEVEL); + } } *ppStmt = pStmt; return rc; @@ -118131,6 +120193,47 @@ static int fts3PendingListAppend( } /* +** Free a PendingList object allocated by fts3PendingListAppend(). +*/ +static void fts3PendingListDelete(PendingList *pList){ + sqlite3_free(pList); +} + +/* +** Add an entry to one of the pending-terms hash tables. +*/ +static int fts3PendingTermsAddOne( + Fts3Table *p, + int iCol, + int iPos, + Fts3Hash *pHash, /* Pending terms hash table to add entry to */ + const char *zToken, + int nToken +){ + PendingList *pList; + int rc = SQLITE_OK; + + pList = (PendingList *)fts3HashFind(pHash, zToken, nToken); + if( pList ){ + p->nPendingData -= (pList->nData + nToken + sizeof(Fts3HashElem)); + } + if( fts3PendingListAppend(&pList, p->iPrevDocid, iCol, iPos, &rc) ){ + if( pList==fts3HashInsert(pHash, zToken, nToken, pList) ){ + /* Malloc failed while inserting the new entry. This can only + ** happen if there was no previous entry for this token. + */ + assert( 0==fts3HashFind(pHash, zToken, nToken) ); + sqlite3_free(pList); + rc = SQLITE_NOMEM; + } + } + if( rc==SQLITE_OK ){ + p->nPendingData += (pList->nData + nToken + sizeof(Fts3HashElem)); + } + return rc; +} + +/* ** Tokenize the nul-terminated string zText and add all tokens to the ** pending-terms hash-table. The docid used is that currently stored in ** p->iPrevDocid, and the column is specified by argument iCol. @@ -118160,6 +120263,14 @@ static int fts3PendingTermsAdd( assert( pTokenizer && pModule ); + /* If the user has inserted a NULL value, this function may be called with + ** zText==0. In this case, add zero token entries to the hash table and + ** return early. */ + if( zText==0 ){ + *pnWord = 0; + return SQLITE_OK; + } + rc = pModule->xOpen(pTokenizer, zText, -1, &pCsr); if( rc!=SQLITE_OK ){ return rc; @@ -118170,8 +120281,7 @@ static int fts3PendingTermsAdd( while( SQLITE_OK==rc && SQLITE_OK==(rc = xNext(pCsr, &zToken, &nToken, &iStart, &iEnd, &iPos)) ){ - PendingList *pList; - + int i; if( iPos>=nWord ) nWord = iPos+1; /* Positions cannot be negative; we use -1 as a terminator internally. @@ -118182,22 +120292,19 @@ static int fts3PendingTermsAdd( break; } - pList = (PendingList *)fts3HashFind(&p->pendingTerms, zToken, nToken); - if( pList ){ - p->nPendingData -= (pList->nData + nToken + sizeof(Fts3HashElem)); - } - if( fts3PendingListAppend(&pList, p->iPrevDocid, iCol, iPos, &rc) ){ - if( pList==fts3HashInsert(&p->pendingTerms, zToken, nToken, pList) ){ - /* Malloc failed while inserting the new entry. This can only - ** happen if there was no previous entry for this token. - */ - assert( 0==fts3HashFind(&p->pendingTerms, zToken, nToken) ); - sqlite3_free(pList); - rc = SQLITE_NOMEM; - } - } - if( rc==SQLITE_OK ){ - p->nPendingData += (pList->nData + nToken + sizeof(Fts3HashElem)); + /* Add the term to the terms index */ + rc = fts3PendingTermsAddOne( + p, iCol, iPos, &p->aIndex[0].hPending, zToken, nToken + ); + + /* Add the term to each of the prefix indexes that it is not too + ** short for. */ + for(i=1; rc==SQLITE_OK && i<p->nIndex; i++){ + struct Fts3Index *pIndex = &p->aIndex[i]; + if( nToken<pIndex->nPrefix ) continue; + rc = fts3PendingTermsAddOne( + p, iCol, iPos, &pIndex->hPending, zToken, pIndex->nPrefix + ); } } @@ -118227,14 +120334,19 @@ static int fts3PendingTermsDocid(Fts3Table *p, sqlite_int64 iDocid){ } /* -** Discard the contents of the pending-terms hash table. +** Discard the contents of the pending-terms hash tables. */ SQLITE_PRIVATE void sqlite3Fts3PendingTermsClear(Fts3Table *p){ - Fts3HashElem *pElem; - for(pElem=fts3HashFirst(&p->pendingTerms); pElem; pElem=fts3HashNext(pElem)){ - sqlite3_free(fts3HashData(pElem)); + int i; + for(i=0; i<p->nIndex; i++){ + Fts3HashElem *pElem; + Fts3Hash *pHash = &p->aIndex[i].hPending; + for(pElem=fts3HashFirst(pHash); pElem; pElem=fts3HashNext(pElem)){ + PendingList *pList = (PendingList *)fts3HashData(pElem); + fts3PendingListDelete(pList); + } + fts3HashClear(pHash); } - fts3HashClear(&p->pendingTerms); p->nPendingData = 0; } @@ -118250,11 +120362,9 @@ static int fts3InsertTerms(Fts3Table *p, sqlite3_value **apVal, u32 *aSz){ int i; /* Iterator variable */ for(i=2; i<p->nColumn+2; i++){ const char *zText = (const char *)sqlite3_value_text(apVal[i]); - if( zText ){ - int rc = fts3PendingTermsAdd(p, zText, i-2, &aSz[i-2]); - if( rc!=SQLITE_OK ){ - return rc; - } + int rc = fts3PendingTermsAdd(p, zText, i-2, &aSz[i-2]); + if( rc!=SQLITE_OK ){ + return rc; } aSz[p->nColumn] += sqlite3_value_bytes(apVal[i]); } @@ -118359,14 +120469,14 @@ static int fts3DeleteAll(Fts3Table *p){ static void fts3DeleteTerms( int *pRC, /* Result code */ Fts3Table *p, /* The FTS table to delete from */ - sqlite3_value **apVal, /* apVal[] contains the docid to be deleted */ + sqlite3_value *pRowid, /* The docid to be deleted */ u32 *aSz /* Sizes of deleted document written here */ ){ int rc; sqlite3_stmt *pSelect; if( *pRC ) return; - rc = fts3SqlStmt(p, SQL_SELECT_CONTENT_BY_ROWID, &pSelect, apVal); + rc = fts3SqlStmt(p, SQL_SELECT_CONTENT_BY_ROWID, &pSelect, &pRowid); if( rc==SQLITE_OK ){ if( SQLITE_ROW==sqlite3_step(pSelect) ){ int i; @@ -118392,7 +120502,7 @@ static void fts3DeleteTerms( ** Forward declaration to account for the circular dependency between ** functions fts3SegmentMerge() and fts3AllocateSegdirIdx(). */ -static int fts3SegmentMerge(Fts3Table *, int); +static int fts3SegmentMerge(Fts3Table *, int, int); /* ** This function allocates a new level iLevel index in the segdir table. @@ -118409,7 +120519,12 @@ static int fts3SegmentMerge(Fts3Table *, int); ** If successful, *piIdx is set to the allocated index slot and SQLITE_OK ** returned. Otherwise, an SQLite error code is returned. */ -static int fts3AllocateSegdirIdx(Fts3Table *p, int iLevel, int *piIdx){ +static int fts3AllocateSegdirIdx( + Fts3Table *p, + int iIndex, /* Index for p->aIndex */ + int iLevel, + int *piIdx +){ int rc; /* Return Code */ sqlite3_stmt *pNextIdx; /* Query for next idx at level iLevel */ int iNext = 0; /* Result of query pNextIdx */ @@ -118417,7 +120532,7 @@ static int fts3AllocateSegdirIdx(Fts3Table *p, int iLevel, int *piIdx){ /* Set variable iNext to the next available segdir index at level iLevel. */ rc = fts3SqlStmt(p, SQL_NEXT_SEGMENT_INDEX, &pNextIdx, 0); if( rc==SQLITE_OK ){ - sqlite3_bind_int(pNextIdx, 1, iLevel); + sqlite3_bind_int(pNextIdx, 1, iIndex*FTS3_SEGDIR_MAXLEVEL + iLevel); if( SQLITE_ROW==sqlite3_step(pNextIdx) ){ iNext = sqlite3_column_int(pNextIdx, 0); } @@ -118431,7 +120546,7 @@ static int fts3AllocateSegdirIdx(Fts3Table *p, int iLevel, int *piIdx){ ** if iNext is less than FTS3_MERGE_COUNT, allocate index iNext. */ if( iNext>=FTS3_MERGE_COUNT ){ - rc = fts3SegmentMerge(p, iLevel); + rc = fts3SegmentMerge(p, iIndex, iLevel); *piIdx = 0; }else{ *piIdx = iNext; @@ -118472,7 +120587,8 @@ SQLITE_PRIVATE int sqlite3Fts3ReadBlock( Fts3Table *p, /* FTS3 table handle */ sqlite3_int64 iBlockid, /* Access the row with blockid=$iBlockid */ char **paBlob, /* OUT: Blob data in malloc'd buffer */ - int *pnBlob /* OUT: Size of blob data */ + int *pnBlob, /* OUT: Size of blob data */ + int *pnLoad /* OUT: Bytes actually loaded */ ){ int rc; /* Return code */ @@ -118493,11 +120609,16 @@ SQLITE_PRIVATE int sqlite3Fts3ReadBlock( if( rc==SQLITE_OK ){ int nByte = sqlite3_blob_bytes(p->pSegments); + *pnBlob = nByte; if( paBlob ){ char *aByte = sqlite3_malloc(nByte + FTS3_NODE_PADDING); if( !aByte ){ rc = SQLITE_NOMEM; }else{ + if( pnLoad && nByte>(FTS3_NODE_CHUNK_THRESHOLD) ){ + nByte = FTS3_NODE_CHUNKSIZE; + *pnLoad = nByte; + } rc = sqlite3_blob_read(p->pSegments, aByte, nByte, 0); memset(&aByte[nByte], 0, FTS3_NODE_PADDING); if( rc!=SQLITE_OK ){ @@ -118507,7 +120628,6 @@ SQLITE_PRIVATE int sqlite3Fts3ReadBlock( } *paBlob = aByte; } - *pnBlob = nByte; } return rc; @@ -118521,13 +120641,55 @@ SQLITE_PRIVATE void sqlite3Fts3SegmentsClose(Fts3Table *p){ sqlite3_blob_close(p->pSegments); p->pSegments = 0; } + +static int fts3SegReaderIncrRead(Fts3SegReader *pReader){ + int nRead; /* Number of bytes to read */ + int rc; /* Return code */ + + nRead = MIN(pReader->nNode - pReader->nPopulate, FTS3_NODE_CHUNKSIZE); + rc = sqlite3_blob_read( + pReader->pBlob, + &pReader->aNode[pReader->nPopulate], + nRead, + pReader->nPopulate + ); + + if( rc==SQLITE_OK ){ + pReader->nPopulate += nRead; + memset(&pReader->aNode[pReader->nPopulate], 0, FTS3_NODE_PADDING); + if( pReader->nPopulate==pReader->nNode ){ + sqlite3_blob_close(pReader->pBlob); + pReader->pBlob = 0; + pReader->nPopulate = 0; + } + } + return rc; +} + +static int fts3SegReaderRequire(Fts3SegReader *pReader, char *pFrom, int nByte){ + int rc = SQLITE_OK; + assert( !pReader->pBlob + || (pFrom>=pReader->aNode && pFrom<&pReader->aNode[pReader->nNode]) + ); + while( pReader->pBlob && rc==SQLITE_OK + && (pFrom - pReader->aNode + nByte)>pReader->nPopulate + ){ + rc = fts3SegReaderIncrRead(pReader); + } + return rc; +} /* ** Move the iterator passed as the first argument to the next term in the ** segment. If successful, SQLITE_OK is returned. If there is no next term, ** SQLITE_DONE. Otherwise, an SQLite error code. */ -static int fts3SegReaderNext(Fts3Table *p, Fts3SegReader *pReader){ +static int fts3SegReaderNext( + Fts3Table *p, + Fts3SegReader *pReader, + int bIncr +){ + int rc; /* Return code of various sub-routines */ char *pNext; /* Cursor variable */ int nPrefix; /* Number of bytes in term prefix */ int nSuffix; /* Number of bytes in term suffix */ @@ -118539,7 +120701,6 @@ static int fts3SegReaderNext(Fts3Table *p, Fts3SegReader *pReader){ } if( !pNext || pNext>=&pReader->aNode[pReader->nNode] ){ - int rc; /* Return code from Fts3ReadBlock() */ if( fts3SegReaderIsPending(pReader) ){ Fts3HashElem *pElem = *(pReader->ppNextElem); @@ -118559,6 +120720,8 @@ static int fts3SegReaderNext(Fts3Table *p, Fts3SegReader *pReader){ if( !fts3SegReaderIsRootOnly(pReader) ){ sqlite3_free(pReader->aNode); + sqlite3_blob_close(pReader->pBlob); + pReader->pBlob = 0; } pReader->aNode = 0; @@ -118570,21 +120733,31 @@ static int fts3SegReaderNext(Fts3Table *p, Fts3SegReader *pReader){ } rc = sqlite3Fts3ReadBlock( - p, ++pReader->iCurrentBlock, &pReader->aNode, &pReader->nNode + p, ++pReader->iCurrentBlock, &pReader->aNode, &pReader->nNode, + (bIncr ? &pReader->nPopulate : 0) ); if( rc!=SQLITE_OK ) return rc; + assert( pReader->pBlob==0 ); + if( bIncr && pReader->nPopulate<pReader->nNode ){ + pReader->pBlob = p->pSegments; + p->pSegments = 0; + } pNext = pReader->aNode; } + + assert( !fts3SegReaderIsPending(pReader) ); + + rc = fts3SegReaderRequire(pReader, pNext, FTS3_VARINT_MAX*2); + if( rc!=SQLITE_OK ) return rc; /* Because of the FTS3_NODE_PADDING bytes of padding, the following is - ** safe (no risk of overread) even if the node data is corrupted. - */ + ** safe (no risk of overread) even if the node data is corrupted. */ pNext += sqlite3Fts3GetVarint32(pNext, &nPrefix); pNext += sqlite3Fts3GetVarint32(pNext, &nSuffix); if( nPrefix<0 || nSuffix<=0 || &pNext[nSuffix]>&pReader->aNode[pReader->nNode] ){ - return SQLITE_CORRUPT; + return SQLITE_CORRUPT_VTAB; } if( nPrefix+nSuffix>pReader->nTermAlloc ){ @@ -118596,6 +120769,10 @@ static int fts3SegReaderNext(Fts3Table *p, Fts3SegReader *pReader){ pReader->zTerm = zNew; pReader->nTermAlloc = nNew; } + + rc = fts3SegReaderRequire(pReader, pNext, nSuffix+FTS3_VARINT_MAX); + if( rc!=SQLITE_OK ) return rc; + memcpy(&pReader->zTerm[nPrefix], pNext, nSuffix); pReader->nTerm = nPrefix+nSuffix; pNext += nSuffix; @@ -118608,9 +120785,9 @@ static int fts3SegReaderNext(Fts3Table *p, Fts3SegReader *pReader){ ** of these statements is untrue, then the data structure is corrupt. */ if( &pReader->aDoclist[pReader->nDoclist]>&pReader->aNode[pReader->nNode] - || pReader->aDoclist[pReader->nDoclist-1] + || (pReader->nPopulate==0 && pReader->aDoclist[pReader->nDoclist-1]) ){ - return SQLITE_CORRUPT; + return SQLITE_CORRUPT_VTAB; } return SQLITE_OK; } @@ -118619,12 +120796,26 @@ static int fts3SegReaderNext(Fts3Table *p, Fts3SegReader *pReader){ ** Set the SegReader to point to the first docid in the doclist associated ** with the current term. */ -static void fts3SegReaderFirstDocid(Fts3SegReader *pReader){ - int n; +static int fts3SegReaderFirstDocid(Fts3Table *pTab, Fts3SegReader *pReader){ + int rc = SQLITE_OK; assert( pReader->aDoclist ); assert( !pReader->pOffsetList ); - n = sqlite3Fts3GetVarint(pReader->aDoclist, &pReader->iDocid); - pReader->pOffsetList = &pReader->aDoclist[n]; + if( pTab->bDescIdx && fts3SegReaderIsPending(pReader) ){ + u8 bEof = 0; + pReader->iDocid = 0; + pReader->nOffsetList = 0; + sqlite3Fts3DoclistPrev(0, + pReader->aDoclist, pReader->nDoclist, &pReader->pOffsetList, + &pReader->iDocid, &pReader->nOffsetList, &bEof + ); + }else{ + rc = fts3SegReaderRequire(pReader, pReader->aDoclist, FTS3_VARINT_MAX); + if( rc==SQLITE_OK ){ + int n = sqlite3Fts3GetVarint(pReader->aDoclist, &pReader->iDocid); + pReader->pOffsetList = &pReader->aDoclist[n]; + } + } + return rc; } /* @@ -118637,128 +120828,125 @@ static void fts3SegReaderFirstDocid(Fts3SegReader *pReader){ ** *pnOffsetList is set to the length of the set of column-offset ** lists, not including the nul-terminator byte. For example: */ -static void fts3SegReaderNextDocid( - Fts3SegReader *pReader, - char **ppOffsetList, - int *pnOffsetList +static int fts3SegReaderNextDocid( + Fts3Table *pTab, + Fts3SegReader *pReader, /* Reader to advance to next docid */ + char **ppOffsetList, /* OUT: Pointer to current position-list */ + int *pnOffsetList /* OUT: Length of *ppOffsetList in bytes */ ){ + int rc = SQLITE_OK; char *p = pReader->pOffsetList; char c = 0; - /* Pointer p currently points at the first byte of an offset list. The - ** following two lines advance it to point one byte past the end of - ** the same offset list. - */ - while( *p | c ) c = *p++ & 0x80; - p++; - - /* If required, populate the output variables with a pointer to and the - ** size of the previous offset-list. - */ - if( ppOffsetList ){ - *ppOffsetList = pReader->pOffsetList; - *pnOffsetList = (int)(p - pReader->pOffsetList - 1); - } + assert( p ); - /* If there are no more entries in the doclist, set pOffsetList to - ** NULL. Otherwise, set Fts3SegReader.iDocid to the next docid and - ** Fts3SegReader.pOffsetList to point to the next offset list before - ** returning. - */ - if( p>=&pReader->aDoclist[pReader->nDoclist] ){ - pReader->pOffsetList = 0; + if( pTab->bDescIdx && fts3SegReaderIsPending(pReader) ){ + /* A pending-terms seg-reader for an FTS4 table that uses order=desc. + ** Pending-terms doclists are always built up in ascending order, so + ** we have to iterate through them backwards here. */ + u8 bEof = 0; + if( ppOffsetList ){ + *ppOffsetList = pReader->pOffsetList; + *pnOffsetList = pReader->nOffsetList - 1; + } + sqlite3Fts3DoclistPrev(0, + pReader->aDoclist, pReader->nDoclist, &p, &pReader->iDocid, + &pReader->nOffsetList, &bEof + ); + if( bEof ){ + pReader->pOffsetList = 0; + }else{ + pReader->pOffsetList = p; + } }else{ - sqlite3_int64 iDelta; - pReader->pOffsetList = p + sqlite3Fts3GetVarint(p, &iDelta); - pReader->iDocid += iDelta; - } -} - -/* -** This function is called to estimate the amount of data that will be -** loaded from the disk If SegReaderIterate() is called on this seg-reader, -** in units of average document size. -** -** This can be used as follows: If the caller has a small doclist that -** contains references to N documents, and is considering merging it with -** a large doclist (size X "average documents"), it may opt not to load -** the large doclist if X>N. -*/ -SQLITE_PRIVATE int sqlite3Fts3SegReaderCost( - Fts3Cursor *pCsr, /* FTS3 cursor handle */ - Fts3SegReader *pReader, /* Segment-reader handle */ - int *pnCost /* IN/OUT: Number of bytes read */ -){ - Fts3Table *p = (Fts3Table*)pCsr->base.pVtab; - int rc = SQLITE_OK; /* Return code */ - int nCost = 0; /* Cost in bytes to return */ - int pgsz = p->nPgsz; /* Database page size */ + char *pEnd = &pReader->aDoclist[pReader->nDoclist]; - /* If this seg-reader is reading the pending-terms table, or if all data - ** for the segment is stored on the root page of the b-tree, then the cost - ** is zero. In this case all required data is already in main memory. - */ - if( p->bHasStat - && !fts3SegReaderIsPending(pReader) - && !fts3SegReaderIsRootOnly(pReader) - ){ - int nBlob = 0; - sqlite3_int64 iBlock; - - if( pCsr->nRowAvg==0 ){ - /* The average document size, which is required to calculate the cost - ** of each doclist, has not yet been determined. Read the required - ** data from the %_stat table to calculate it. - ** - ** Entry 0 of the %_stat table is a blob containing (nCol+1) FTS3 - ** varints, where nCol is the number of columns in the FTS3 table. - ** The first varint is the number of documents currently stored in - ** the table. The following nCol varints contain the total amount of - ** data stored in all rows of each column of the table, from left - ** to right. + /* Pointer p currently points at the first byte of an offset list. The + ** following block advances it to point one byte past the end of + ** the same offset list. */ + while( 1 ){ + + /* The following line of code (and the "p++" below the while() loop) is + ** normally all that is required to move pointer p to the desired + ** position. The exception is if this node is being loaded from disk + ** incrementally and pointer "p" now points to the first byte passed + ** the populated part of pReader->aNode[]. */ - sqlite3_stmt *pStmt; - sqlite3_int64 nDoc = 0; - sqlite3_int64 nByte = 0; - const char *pEnd; - const char *a; - - rc = sqlite3Fts3SelectDoctotal(p, &pStmt); - if( rc!=SQLITE_OK ) return rc; - a = sqlite3_column_blob(pStmt, 0); - assert( a ); - - pEnd = &a[sqlite3_column_bytes(pStmt, 0)]; - a += sqlite3Fts3GetVarint(a, &nDoc); - while( a<pEnd ){ - a += sqlite3Fts3GetVarint(a, &nByte); - } - if( nDoc==0 || nByte==0 ){ - sqlite3_reset(pStmt); - return SQLITE_CORRUPT; - } - - pCsr->nRowAvg = (int)(((nByte / nDoc) + pgsz) / pgsz); - assert( pCsr->nRowAvg>0 ); - rc = sqlite3_reset(pStmt); + while( *p | c ) c = *p++ & 0x80; + assert( *p==0 ); + + if( pReader->pBlob==0 || p<&pReader->aNode[pReader->nPopulate] ) break; + rc = fts3SegReaderIncrRead(pReader); if( rc!=SQLITE_OK ) return rc; } + p++; + + /* If required, populate the output variables with a pointer to and the + ** size of the previous offset-list. + */ + if( ppOffsetList ){ + *ppOffsetList = pReader->pOffsetList; + *pnOffsetList = (int)(p - pReader->pOffsetList - 1); + } - /* Assume that a blob flows over onto overflow pages if it is larger - ** than (pgsz-35) bytes in size (the file-format documentation - ** confirms this). + while( p<pEnd && *p==0 ) p++; + + /* If there are no more entries in the doclist, set pOffsetList to + ** NULL. Otherwise, set Fts3SegReader.iDocid to the next docid and + ** Fts3SegReader.pOffsetList to point to the next offset list before + ** returning. */ - for(iBlock=pReader->iStartBlock; iBlock<=pReader->iLeafEndBlock; iBlock++){ - rc = sqlite3Fts3ReadBlock(p, iBlock, 0, &nBlob); - if( rc!=SQLITE_OK ) break; - if( (nBlob+35)>pgsz ){ - int nOvfl = (nBlob + 34)/pgsz; - nCost += ((nOvfl + pCsr->nRowAvg - 1)/pCsr->nRowAvg); + if( p>=pEnd ){ + pReader->pOffsetList = 0; + }else{ + rc = fts3SegReaderRequire(pReader, p, FTS3_VARINT_MAX); + if( rc==SQLITE_OK ){ + sqlite3_int64 iDelta; + pReader->pOffsetList = p + sqlite3Fts3GetVarint(p, &iDelta); + if( pTab->bDescIdx ){ + pReader->iDocid -= iDelta; + }else{ + pReader->iDocid += iDelta; + } } } } - *pnCost += nCost; + return SQLITE_OK; +} + + +SQLITE_PRIVATE int sqlite3Fts3MsrOvfl( + Fts3Cursor *pCsr, + Fts3MultiSegReader *pMsr, + int *pnOvfl +){ + Fts3Table *p = (Fts3Table*)pCsr->base.pVtab; + int nOvfl = 0; + int ii; + int rc = SQLITE_OK; + int pgsz = p->nPgsz; + + assert( p->bHasStat ); + assert( pgsz>0 ); + + for(ii=0; rc==SQLITE_OK && ii<pMsr->nSegment; ii++){ + Fts3SegReader *pReader = pMsr->apSegment[ii]; + if( !fts3SegReaderIsPending(pReader) + && !fts3SegReaderIsRootOnly(pReader) + ){ + sqlite3_int64 jj; + for(jj=pReader->iStartBlock; jj<=pReader->iLeafEndBlock; jj++){ + int nBlob; + rc = sqlite3Fts3ReadBlock(p, jj, 0, &nBlob, 0); + if( rc!=SQLITE_OK ) break; + if( (nBlob+35)>pgsz ){ + nOvfl += (nBlob + 34)/pgsz; + } + } + } + } + *pnOvfl = nOvfl; return rc; } @@ -118771,6 +120959,7 @@ SQLITE_PRIVATE void sqlite3Fts3SegReaderFree(Fts3SegReader *pReader){ sqlite3_free(pReader->zTerm); if( !fts3SegReaderIsRootOnly(pReader) ){ sqlite3_free(pReader->aNode); + sqlite3_blob_close(pReader->pBlob); } } sqlite3_free(pReader); @@ -118847,24 +121036,42 @@ static int fts3CompareElemByTerm(const void *lhs, const void *rhs){ /* ** This function is used to allocate an Fts3SegReader that iterates through ** a subset of the terms stored in the Fts3Table.pendingTerms array. +** +** If the isPrefixIter parameter is zero, then the returned SegReader iterates +** through each term in the pending-terms table. Or, if isPrefixIter is +** non-zero, it iterates through each term and its prefixes. For example, if +** the pending terms hash table contains the terms "sqlite", "mysql" and +** "firebird", then the iterator visits the following 'terms' (in the order +** shown): +** +** f fi fir fire fireb firebi firebir firebird +** m my mys mysq mysql +** s sq sql sqli sqlit sqlite +** +** Whereas if isPrefixIter is zero, the terms visited are: +** +** firebird mysql sqlite */ SQLITE_PRIVATE int sqlite3Fts3SegReaderPending( Fts3Table *p, /* Virtual table handle */ + int iIndex, /* Index for p->aIndex */ const char *zTerm, /* Term to search for */ int nTerm, /* Size of buffer zTerm */ - int isPrefix, /* True for a term-prefix query */ + int bPrefix, /* True for a prefix iterator */ Fts3SegReader **ppReader /* OUT: SegReader for pending-terms */ ){ Fts3SegReader *pReader = 0; /* Fts3SegReader object to return */ Fts3HashElem **aElem = 0; /* Array of term hash entries to scan */ int nElem = 0; /* Size of array at aElem */ int rc = SQLITE_OK; /* Return Code */ + Fts3Hash *pHash; - if( isPrefix ){ + pHash = &p->aIndex[iIndex].hPending; + if( bPrefix ){ int nAlloc = 0; /* Size of allocated array at aElem */ Fts3HashElem *pE = 0; /* Iterator variable */ - for(pE=fts3HashFirst(&p->pendingTerms); pE; pE=fts3HashNext(pE)){ + for(pE=fts3HashFirst(pHash); pE; pE=fts3HashNext(pE)){ char *zKey = (char *)fts3HashKey(pE); int nKey = fts3HashKeysize(pE); if( nTerm==0 || (nKey>=nTerm && 0==memcmp(zKey, zTerm, nTerm)) ){ @@ -118881,6 +121088,7 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderPending( } aElem = aElem2; } + aElem[nElem++] = pE; } } @@ -118894,7 +121102,9 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderPending( } }else{ - Fts3HashElem *pE = fts3HashFindElem(&p->pendingTerms, zTerm, nTerm); + /* The query is a simple term lookup that matches at most one term in + ** the index. All that is required is a straight hash-lookup. */ + Fts3HashElem *pE = fts3HashFindElem(pHash, zTerm, nTerm); if( pE ){ aElem = &pE; nElem = 1; @@ -118914,7 +121124,7 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderPending( } } - if( isPrefix ){ + if( bPrefix ){ sqlite3_free(aElem); } *ppReader = pReader; @@ -118978,6 +121188,18 @@ static int fts3SegReaderDoclistCmp(Fts3SegReader *pLhs, Fts3SegReader *pRhs){ assert( pLhs->aNode && pRhs->aNode ); return rc; } +static int fts3SegReaderDoclistCmpRev(Fts3SegReader *pLhs, Fts3SegReader *pRhs){ + int rc = (pLhs->pOffsetList==0)-(pRhs->pOffsetList==0); + if( rc==0 ){ + if( pLhs->iDocid==pRhs->iDocid ){ + rc = pRhs->iIdx - pLhs->iIdx; + }else{ + rc = (pLhs->iDocid < pRhs->iDocid) ? 1 : -1; + } + } + assert( pLhs->aNode && pRhs->aNode ); + return rc; +} /* ** Compare the term that the Fts3SegReader object passed as the first argument @@ -119506,16 +121728,16 @@ static void fts3SegWriterFree(SegmentWriter *pWriter){ ** The first value in the apVal[] array is assumed to contain an integer. ** This function tests if there exist any documents with docid values that ** are different from that integer. i.e. if deleting the document with docid -** apVal[0] would mean the FTS3 table were empty. +** pRowid would mean the FTS3 table were empty. ** ** If successful, *pisEmpty is set to true if the table is empty except for -** document apVal[0], or false otherwise, and SQLITE_OK is returned. If an +** document pRowid, or false otherwise, and SQLITE_OK is returned. If an ** error occurs, an SQLite error code is returned. */ -static int fts3IsEmpty(Fts3Table *p, sqlite3_value **apVal, int *pisEmpty){ +static int fts3IsEmpty(Fts3Table *p, sqlite3_value *pRowid, int *pisEmpty){ sqlite3_stmt *pStmt; int rc; - rc = fts3SqlStmt(p, SQL_IS_EMPTY, &pStmt, apVal); + rc = fts3SqlStmt(p, SQL_IS_EMPTY, &pStmt, &pRowid); if( rc==SQLITE_OK ){ if( SQLITE_ROW==sqlite3_step(pStmt) ){ *pisEmpty = sqlite3_column_int(pStmt, 0); @@ -119526,21 +121748,30 @@ static int fts3IsEmpty(Fts3Table *p, sqlite3_value **apVal, int *pisEmpty){ } /* -** Set *pnSegment to the total number of segments in the database. Set -** *pnMax to the largest segment level in the database (segment levels -** are stored in the 'level' column of the %_segdir table). +** Set *pnMax to the largest segment level in the database for the index +** iIndex. +** +** Segment levels are stored in the 'level' column of the %_segdir table. ** ** Return SQLITE_OK if successful, or an SQLite error code if not. */ -static int fts3SegmentCountMax(Fts3Table *p, int *pnSegment, int *pnMax){ +static int fts3SegmentMaxLevel(Fts3Table *p, int iIndex, int *pnMax){ sqlite3_stmt *pStmt; int rc; + assert( iIndex>=0 && iIndex<p->nIndex ); - rc = fts3SqlStmt(p, SQL_SELECT_SEGDIR_COUNT_MAX, &pStmt, 0); + /* Set pStmt to the compiled version of: + ** + ** SELECT max(level) FROM %Q.'%q_segdir' WHERE level BETWEEN ? AND ? + ** + ** (1024 is actually the value of macro FTS3_SEGDIR_PREFIXLEVEL_STR). + */ + rc = fts3SqlStmt(p, SQL_SELECT_SEGDIR_MAX_LEVEL, &pStmt, 0); if( rc!=SQLITE_OK ) return rc; + sqlite3_bind_int(pStmt, 1, iIndex*FTS3_SEGDIR_MAXLEVEL); + sqlite3_bind_int(pStmt, 2, (iIndex+1)*FTS3_SEGDIR_MAXLEVEL - 1); if( SQLITE_ROW==sqlite3_step(pStmt) ){ - *pnSegment = sqlite3_column_int(pStmt, 0); - *pnMax = sqlite3_column_int(pStmt, 1); + *pnMax = sqlite3_column_int(pStmt, 0); } return sqlite3_reset(pStmt); } @@ -119561,6 +121792,7 @@ static int fts3SegmentCountMax(Fts3Table *p, int *pnSegment, int *pnMax){ */ static int fts3DeleteSegdir( Fts3Table *p, /* Virtual table handle */ + int iIndex, /* Index for p->aIndex */ int iLevel, /* Level of %_segdir entries to delete */ Fts3SegReader **apSegment, /* Array of SegReader objects */ int nReader /* Size of array apSegment */ @@ -119583,20 +121815,25 @@ static int fts3DeleteSegdir( return rc; } + assert( iLevel>=0 || iLevel==FTS3_SEGCURSOR_ALL ); if( iLevel==FTS3_SEGCURSOR_ALL ){ - fts3SqlExec(&rc, p, SQL_DELETE_ALL_SEGDIR, 0); - }else if( iLevel==FTS3_SEGCURSOR_PENDING ){ - sqlite3Fts3PendingTermsClear(p); + rc = fts3SqlStmt(p, SQL_DELETE_SEGDIR_RANGE, &pDelete, 0); + if( rc==SQLITE_OK ){ + sqlite3_bind_int(pDelete, 1, iIndex*FTS3_SEGDIR_MAXLEVEL); + sqlite3_bind_int(pDelete, 2, (iIndex+1) * FTS3_SEGDIR_MAXLEVEL - 1); + } }else{ - assert( iLevel>=0 ); - rc = fts3SqlStmt(p, SQL_DELETE_SEGDIR_BY_LEVEL, &pDelete, 0); + rc = fts3SqlStmt(p, SQL_DELETE_SEGDIR_LEVEL, &pDelete, 0); if( rc==SQLITE_OK ){ - sqlite3_bind_int(pDelete, 1, iLevel); - sqlite3_step(pDelete); - rc = sqlite3_reset(pDelete); + sqlite3_bind_int(pDelete, 1, iIndex*FTS3_SEGDIR_MAXLEVEL + iLevel); } } + if( rc==SQLITE_OK ){ + sqlite3_step(pDelete); + rc = sqlite3_reset(pDelete); + } + return rc; } @@ -119643,15 +121880,106 @@ static void fts3ColumnFilter( *pnList = nList; } -SQLITE_PRIVATE int sqlite3Fts3SegReaderStart( +/* +** Cache data in the Fts3MultiSegReader.aBuffer[] buffer (overwriting any +** existing data). Grow the buffer if required. +** +** If successful, return SQLITE_OK. Otherwise, if an OOM error is encountered +** trying to resize the buffer, return SQLITE_NOMEM. +*/ +static int fts3MsrBufferData( + Fts3MultiSegReader *pMsr, /* Multi-segment-reader handle */ + char *pList, + int nList +){ + if( nList>pMsr->nBuffer ){ + char *pNew; + pMsr->nBuffer = nList*2; + pNew = (char *)sqlite3_realloc(pMsr->aBuffer, pMsr->nBuffer); + if( !pNew ) return SQLITE_NOMEM; + pMsr->aBuffer = pNew; + } + + memcpy(pMsr->aBuffer, pList, nList); + return SQLITE_OK; +} + +SQLITE_PRIVATE int sqlite3Fts3MsrIncrNext( Fts3Table *p, /* Virtual table handle */ - Fts3SegReaderCursor *pCsr, /* Cursor object */ - Fts3SegFilter *pFilter /* Restrictions on range of iteration */ + Fts3MultiSegReader *pMsr, /* Multi-segment-reader handle */ + sqlite3_int64 *piDocid, /* OUT: Docid value */ + char **paPoslist, /* OUT: Pointer to position list */ + int *pnPoslist /* OUT: Size of position list in bytes */ +){ + int nMerge = pMsr->nAdvance; + Fts3SegReader **apSegment = pMsr->apSegment; + int (*xCmp)(Fts3SegReader *, Fts3SegReader *) = ( + p->bDescIdx ? fts3SegReaderDoclistCmpRev : fts3SegReaderDoclistCmp + ); + + if( nMerge==0 ){ + *paPoslist = 0; + return SQLITE_OK; + } + + while( 1 ){ + Fts3SegReader *pSeg; + pSeg = pMsr->apSegment[0]; + + if( pSeg->pOffsetList==0 ){ + *paPoslist = 0; + break; + }else{ + int rc; + char *pList; + int nList; + int j; + sqlite3_int64 iDocid = apSegment[0]->iDocid; + + rc = fts3SegReaderNextDocid(p, apSegment[0], &pList, &nList); + j = 1; + while( rc==SQLITE_OK + && j<nMerge + && apSegment[j]->pOffsetList + && apSegment[j]->iDocid==iDocid + ){ + rc = fts3SegReaderNextDocid(p, apSegment[j], 0, 0); + j++; + } + if( rc!=SQLITE_OK ) return rc; + fts3SegReaderSort(pMsr->apSegment, nMerge, j, xCmp); + + if( pMsr->iColFilter>=0 ){ + fts3ColumnFilter(pMsr->iColFilter, &pList, &nList); + } + + if( nList>0 ){ + if( fts3SegReaderIsPending(apSegment[0]) ){ + rc = fts3MsrBufferData(pMsr, pList, nList+1); + if( rc!=SQLITE_OK ) return rc; + *paPoslist = pMsr->aBuffer; + assert( (pMsr->aBuffer[nList] & 0xFE)==0x00 ); + }else{ + *paPoslist = pList; + } + *piDocid = iDocid; + *pnPoslist = nList; + break; + } + } + } + + return SQLITE_OK; +} + +static int fts3SegReaderStart( + Fts3Table *p, /* Virtual table handle */ + Fts3MultiSegReader *pCsr, /* Cursor object */ + const char *zTerm, /* Term searched for (or NULL) */ + int nTerm /* Length of zTerm in bytes */ ){ int i; - - /* Initialize the cursor object */ - pCsr->pFilter = pFilter; + int nSeg = pCsr->nSegment; /* If the Fts3SegFilter defines a specific term (or term prefix) to search ** for, then advance each segment iterator until it points to a term of @@ -119659,24 +121987,105 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderStart( ** unnecessary merge/sort operations for the case where single segment ** b-tree leaf nodes contain more than one term. */ - for(i=0; i<pCsr->nSegment; i++){ - int nTerm = pFilter->nTerm; - const char *zTerm = pFilter->zTerm; + for(i=0; pCsr->bRestart==0 && i<pCsr->nSegment; i++){ Fts3SegReader *pSeg = pCsr->apSegment[i]; do { - int rc = fts3SegReaderNext(p, pSeg); + int rc = fts3SegReaderNext(p, pSeg, 0); if( rc!=SQLITE_OK ) return rc; }while( zTerm && fts3SegReaderTermCmp(pSeg, zTerm, nTerm)<0 ); } - fts3SegReaderSort( - pCsr->apSegment, pCsr->nSegment, pCsr->nSegment, fts3SegReaderCmp); + fts3SegReaderSort(pCsr->apSegment, nSeg, nSeg, fts3SegReaderCmp); return SQLITE_OK; } +SQLITE_PRIVATE int sqlite3Fts3SegReaderStart( + Fts3Table *p, /* Virtual table handle */ + Fts3MultiSegReader *pCsr, /* Cursor object */ + Fts3SegFilter *pFilter /* Restrictions on range of iteration */ +){ + pCsr->pFilter = pFilter; + return fts3SegReaderStart(p, pCsr, pFilter->zTerm, pFilter->nTerm); +} + +SQLITE_PRIVATE int sqlite3Fts3MsrIncrStart( + Fts3Table *p, /* Virtual table handle */ + Fts3MultiSegReader *pCsr, /* Cursor object */ + int iCol, /* Column to match on. */ + const char *zTerm, /* Term to iterate through a doclist for */ + int nTerm /* Number of bytes in zTerm */ +){ + int i; + int rc; + int nSegment = pCsr->nSegment; + int (*xCmp)(Fts3SegReader *, Fts3SegReader *) = ( + p->bDescIdx ? fts3SegReaderDoclistCmpRev : fts3SegReaderDoclistCmp + ); + + assert( pCsr->pFilter==0 ); + assert( zTerm && nTerm>0 ); + + /* Advance each segment iterator until it points to the term zTerm/nTerm. */ + rc = fts3SegReaderStart(p, pCsr, zTerm, nTerm); + if( rc!=SQLITE_OK ) return rc; + + /* Determine how many of the segments actually point to zTerm/nTerm. */ + for(i=0; i<nSegment; i++){ + Fts3SegReader *pSeg = pCsr->apSegment[i]; + if( !pSeg->aNode || fts3SegReaderTermCmp(pSeg, zTerm, nTerm) ){ + break; + } + } + pCsr->nAdvance = i; + + /* Advance each of the segments to point to the first docid. */ + for(i=0; i<pCsr->nAdvance; i++){ + rc = fts3SegReaderFirstDocid(p, pCsr->apSegment[i]); + if( rc!=SQLITE_OK ) return rc; + } + fts3SegReaderSort(pCsr->apSegment, i, i, xCmp); + + assert( iCol<0 || iCol<p->nColumn ); + pCsr->iColFilter = iCol; + + return SQLITE_OK; +} + +/* +** This function is called on a MultiSegReader that has been started using +** sqlite3Fts3MsrIncrStart(). One or more calls to MsrIncrNext() may also +** have been made. Calling this function puts the MultiSegReader in such +** a state that if the next two calls are: +** +** sqlite3Fts3SegReaderStart() +** sqlite3Fts3SegReaderStep() +** +** then the entire doclist for the term is available in +** MultiSegReader.aDoclist/nDoclist. +*/ +SQLITE_PRIVATE int sqlite3Fts3MsrIncrRestart(Fts3MultiSegReader *pCsr){ + int i; /* Used to iterate through segment-readers */ + + assert( pCsr->zTerm==0 ); + assert( pCsr->nTerm==0 ); + assert( pCsr->aDoclist==0 ); + assert( pCsr->nDoclist==0 ); + + pCsr->nAdvance = 0; + pCsr->bRestart = 1; + for(i=0; i<pCsr->nSegment; i++){ + pCsr->apSegment[i]->pOffsetList = 0; + pCsr->apSegment[i]->nOffsetList = 0; + pCsr->apSegment[i]->iDocid = 0; + } + + return SQLITE_OK; +} + + SQLITE_PRIVATE int sqlite3Fts3SegReaderStep( Fts3Table *p, /* Virtual table handle */ - Fts3SegReaderCursor *pCsr /* Cursor object */ + Fts3MultiSegReader *pCsr /* Cursor object */ ){ int rc = SQLITE_OK; @@ -119689,6 +122098,9 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderStep( Fts3SegReader **apSegment = pCsr->apSegment; int nSegment = pCsr->nSegment; Fts3SegFilter *pFilter = pCsr->pFilter; + int (*xCmp)(Fts3SegReader *, Fts3SegReader *) = ( + p->bDescIdx ? fts3SegReaderDoclistCmpRev : fts3SegReaderDoclistCmp + ); if( pCsr->nSegment==0 ) return SQLITE_OK; @@ -119700,7 +122112,7 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderStep( ** forward. Then sort the list in order of current term again. */ for(i=0; i<pCsr->nAdvance; i++){ - rc = fts3SegReaderNext(p, apSegment[i]); + rc = fts3SegReaderNext(p, apSegment[i], 0); if( rc!=SQLITE_OK ) return rc; } fts3SegReaderSort(apSegment, nSegment, pCsr->nAdvance, fts3SegReaderCmp); @@ -119739,10 +122151,18 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderStep( } assert( isIgnoreEmpty || (isRequirePos && !isColFilter) ); - if( nMerge==1 && !isIgnoreEmpty ){ - pCsr->aDoclist = apSegment[0]->aDoclist; + if( nMerge==1 + && !isIgnoreEmpty + && (p->bDescIdx==0 || fts3SegReaderIsPending(apSegment[0])==0) + ){ pCsr->nDoclist = apSegment[0]->nDoclist; - rc = SQLITE_ROW; + if( fts3SegReaderIsPending(apSegment[0]) ){ + rc = fts3MsrBufferData(pCsr, apSegment[0]->aDoclist, pCsr->nDoclist); + pCsr->aDoclist = pCsr->aBuffer; + }else{ + pCsr->aDoclist = apSegment[0]->aDoclist; + } + if( rc==SQLITE_OK ) rc = SQLITE_ROW; }else{ int nDoclist = 0; /* Size of doclist */ sqlite3_int64 iPrev = 0; /* Previous docid stored in doclist */ @@ -119752,22 +122172,22 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderStep( ** and a single term returned with the merged doclist. */ for(i=0; i<nMerge; i++){ - fts3SegReaderFirstDocid(apSegment[i]); + fts3SegReaderFirstDocid(p, apSegment[i]); } - fts3SegReaderSort(apSegment, nMerge, nMerge, fts3SegReaderDoclistCmp); + fts3SegReaderSort(apSegment, nMerge, nMerge, xCmp); while( apSegment[0]->pOffsetList ){ int j; /* Number of segments that share a docid */ char *pList; int nList; int nByte; sqlite3_int64 iDocid = apSegment[0]->iDocid; - fts3SegReaderNextDocid(apSegment[0], &pList, &nList); + fts3SegReaderNextDocid(p, apSegment[0], &pList, &nList); j = 1; while( j<nMerge && apSegment[j]->pOffsetList && apSegment[j]->iDocid==iDocid ){ - fts3SegReaderNextDocid(apSegment[j], 0, 0); + fts3SegReaderNextDocid(p, apSegment[j], 0, 0); j++; } @@ -119776,7 +122196,19 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderStep( } if( !isIgnoreEmpty || nList>0 ){ - nByte = sqlite3Fts3VarintLen(iDocid-iPrev) + (isRequirePos?nList+1:0); + + /* Calculate the 'docid' delta value to write into the merged + ** doclist. */ + sqlite3_int64 iDelta; + if( p->bDescIdx && nDoclist>0 ){ + iDelta = iPrev - iDocid; + }else{ + iDelta = iDocid - iPrev; + } + assert( iDelta>0 || (nDoclist==0 && iDelta==iDocid) ); + assert( nDoclist>0 || iDelta==iDocid ); + + nByte = sqlite3Fts3VarintLen(iDelta) + (isRequirePos?nList+1:0); if( nDoclist+nByte>pCsr->nBuffer ){ char *aNew; pCsr->nBuffer = (nDoclist+nByte)*2; @@ -119786,9 +122218,7 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderStep( } pCsr->aBuffer = aNew; } - nDoclist += sqlite3Fts3PutVarint( - &pCsr->aBuffer[nDoclist], iDocid-iPrev - ); + nDoclist += sqlite3Fts3PutVarint(&pCsr->aBuffer[nDoclist], iDelta); iPrev = iDocid; if( isRequirePos ){ memcpy(&pCsr->aBuffer[nDoclist], pList, nList); @@ -119797,7 +122227,7 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderStep( } } - fts3SegReaderSort(apSegment, nMerge, j, fts3SegReaderDoclistCmp); + fts3SegReaderSort(apSegment, nMerge, j, xCmp); } if( nDoclist>0 ){ pCsr->aDoclist = pCsr->aBuffer; @@ -119811,8 +122241,9 @@ SQLITE_PRIVATE int sqlite3Fts3SegReaderStep( return rc; } + SQLITE_PRIVATE void sqlite3Fts3SegReaderFinish( - Fts3SegReaderCursor *pCsr /* Cursor object */ + Fts3MultiSegReader *pCsr /* Cursor object */ ){ if( pCsr ){ int i; @@ -119839,43 +122270,56 @@ SQLITE_PRIVATE void sqlite3Fts3SegReaderFinish( ** Otherwise, if successful, SQLITE_OK is returned. If an error occurs, ** an SQLite error code is returned. */ -static int fts3SegmentMerge(Fts3Table *p, int iLevel){ +static int fts3SegmentMerge(Fts3Table *p, int iIndex, int iLevel){ int rc; /* Return code */ int iIdx = 0; /* Index of new segment */ - int iNewLevel = 0; /* Level to create new segment at */ + int iNewLevel = 0; /* Level/index to create new segment at */ SegmentWriter *pWriter = 0; /* Used to write the new, merged, segment */ Fts3SegFilter filter; /* Segment term filter condition */ - Fts3SegReaderCursor csr; /* Cursor to iterate through level(s) */ + Fts3MultiSegReader csr; /* Cursor to iterate through level(s) */ + int bIgnoreEmpty = 0; /* True to ignore empty segments */ + + assert( iLevel==FTS3_SEGCURSOR_ALL + || iLevel==FTS3_SEGCURSOR_PENDING + || iLevel>=0 + ); + assert( iLevel<FTS3_SEGDIR_MAXLEVEL ); + assert( iIndex>=0 && iIndex<p->nIndex ); - rc = sqlite3Fts3SegReaderCursor(p, iLevel, 0, 0, 1, 0, &csr); + rc = sqlite3Fts3SegReaderCursor(p, iIndex, iLevel, 0, 0, 1, 0, &csr); if( rc!=SQLITE_OK || csr.nSegment==0 ) goto finished; if( iLevel==FTS3_SEGCURSOR_ALL ){ /* This call is to merge all segments in the database to a single ** segment. The level of the new segment is equal to the the numerically - ** greatest segment level currently present in the database. The index - ** of the new segment is always 0. */ - int nDummy; /* TODO: Remove this */ + ** greatest segment level currently present in the database for this + ** index. The idx of the new segment is always 0. */ if( csr.nSegment==1 ){ rc = SQLITE_DONE; goto finished; } - rc = fts3SegmentCountMax(p, &nDummy, &iNewLevel); + rc = fts3SegmentMaxLevel(p, iIndex, &iNewLevel); + bIgnoreEmpty = 1; + + }else if( iLevel==FTS3_SEGCURSOR_PENDING ){ + iNewLevel = iIndex * FTS3_SEGDIR_MAXLEVEL; + rc = fts3AllocateSegdirIdx(p, iIndex, 0, &iIdx); }else{ - /* This call is to merge all segments at level iLevel. Find the next + /* This call is to merge all segments at level iLevel. find the next ** available segment index at level iLevel+1. The call to ** fts3AllocateSegdirIdx() will merge the segments at level iLevel+1 to ** a single iLevel+2 segment if necessary. */ - iNewLevel = iLevel+1; - rc = fts3AllocateSegdirIdx(p, iNewLevel, &iIdx); + rc = fts3AllocateSegdirIdx(p, iIndex, iLevel+1, &iIdx); + iNewLevel = iIndex * FTS3_SEGDIR_MAXLEVEL + iLevel+1; } if( rc!=SQLITE_OK ) goto finished; assert( csr.nSegment>0 ); - assert( iNewLevel>=0 ); + assert( iNewLevel>=(iIndex*FTS3_SEGDIR_MAXLEVEL) ); + assert( iNewLevel<((iIndex+1)*FTS3_SEGDIR_MAXLEVEL) ); memset(&filter, 0, sizeof(Fts3SegFilter)); filter.flags = FTS3_SEGMENT_REQUIRE_POS; - filter.flags |= (iLevel==FTS3_SEGCURSOR_ALL ? FTS3_SEGMENT_IGNORE_EMPTY : 0); + filter.flags |= (bIgnoreEmpty ? FTS3_SEGMENT_IGNORE_EMPTY : 0); rc = sqlite3Fts3SegReaderStart(p, &csr, &filter); while( SQLITE_OK==rc ){ @@ -119887,8 +122331,10 @@ static int fts3SegmentMerge(Fts3Table *p, int iLevel){ if( rc!=SQLITE_OK ) goto finished; assert( pWriter ); - rc = fts3DeleteSegdir(p, iLevel, csr.apSegment, csr.nSegment); - if( rc!=SQLITE_OK ) goto finished; + if( iLevel!=FTS3_SEGCURSOR_PENDING ){ + rc = fts3DeleteSegdir(p, iIndex, iLevel, csr.apSegment, csr.nSegment); + if( rc!=SQLITE_OK ) goto finished; + } rc = fts3SegWriterFlush(p, pWriter, iNewLevel, iIdx); finished: @@ -119899,10 +122345,17 @@ static int fts3SegmentMerge(Fts3Table *p, int iLevel){ /* -** Flush the contents of pendingTerms to a level 0 segment. +** Flush the contents of pendingTerms to level 0 segments. */ SQLITE_PRIVATE int sqlite3Fts3PendingTermsFlush(Fts3Table *p){ - return fts3SegmentMerge(p, FTS3_SEGCURSOR_PENDING); + int rc = SQLITE_OK; + int i; + for(i=0; rc==SQLITE_OK && i<p->nIndex; i++){ + rc = fts3SegmentMerge(p, i, FTS3_SEGCURSOR_PENDING); + if( rc==SQLITE_DONE ) rc = SQLITE_OK; + } + sqlite3Fts3PendingTermsClear(p); + return rc; } /* @@ -120053,6 +122506,23 @@ static void fts3UpdateDocTotals( sqlite3_free(a); } +static int fts3DoOptimize(Fts3Table *p, int bReturnDone){ + int i; + int bSeenDone = 0; + int rc = SQLITE_OK; + for(i=0; rc==SQLITE_OK && i<p->nIndex; i++){ + rc = fts3SegmentMerge(p, i, FTS3_SEGCURSOR_ALL); + if( rc==SQLITE_DONE ){ + bSeenDone = 1; + rc = SQLITE_OK; + } + } + sqlite3Fts3SegmentsClose(p); + sqlite3Fts3PendingTermsClear(p); + + return (rc==SQLITE_OK && bReturnDone && bSeenDone) ? SQLITE_DONE : rc; +} + /* ** Handle a 'special' INSERT of the form: ** @@ -120069,12 +122539,7 @@ static int fts3SpecialInsert(Fts3Table *p, sqlite3_value *pVal){ if( !zVal ){ return SQLITE_NOMEM; }else if( nVal==8 && 0==sqlite3_strnicmp(zVal, "optimize", 8) ){ - rc = fts3SegmentMerge(p, FTS3_SEGCURSOR_ALL); - if( rc==SQLITE_DONE ){ - rc = SQLITE_OK; - }else{ - sqlite3Fts3PendingTermsClear(p); - } + rc = fts3DoOptimize(p, 0); #ifdef SQLITE_TEST }else if( nVal>9 && 0==sqlite3_strnicmp(zVal, "nodesize=", 9) ){ p->nNodeSize = atoi(&zVal[9]); @@ -120087,57 +122552,19 @@ static int fts3SpecialInsert(Fts3Table *p, sqlite3_value *pVal){ rc = SQLITE_ERROR; } - sqlite3Fts3SegmentsClose(p); return rc; } /* -** Return the deferred doclist associated with deferred token pDeferred. -** This function assumes that sqlite3Fts3CacheDeferredDoclists() has already -** been called to allocate and populate the doclist. -*/ -SQLITE_PRIVATE char *sqlite3Fts3DeferredDoclist(Fts3DeferredToken *pDeferred, int *pnByte){ - if( pDeferred->pList ){ - *pnByte = pDeferred->pList->nData; - return pDeferred->pList->aData; - } - *pnByte = 0; - return 0; -} - -/* -** Helper fucntion for FreeDeferredDoclists(). This function removes all -** references to deferred doclists from within the tree of Fts3Expr -** structures headed by -*/ -static void fts3DeferredDoclistClear(Fts3Expr *pExpr){ - if( pExpr ){ - fts3DeferredDoclistClear(pExpr->pLeft); - fts3DeferredDoclistClear(pExpr->pRight); - if( pExpr->isLoaded ){ - sqlite3_free(pExpr->aDoclist); - pExpr->isLoaded = 0; - pExpr->aDoclist = 0; - pExpr->nDoclist = 0; - pExpr->pCurrent = 0; - pExpr->iCurrent = 0; - } - } -} - -/* ** Delete all cached deferred doclists. Deferred doclists are cached ** (allocated) by the sqlite3Fts3CacheDeferredDoclists() function. */ SQLITE_PRIVATE void sqlite3Fts3FreeDeferredDoclists(Fts3Cursor *pCsr){ Fts3DeferredToken *pDef; for(pDef=pCsr->pDeferred; pDef; pDef=pDef->pNext){ - sqlite3_free(pDef->pList); + fts3PendingListDelete(pDef->pList); pDef->pList = 0; } - if( pCsr->pDeferred ){ - fts3DeferredDoclistClear(pCsr->pExpr); - } } /* @@ -120149,7 +122576,7 @@ SQLITE_PRIVATE void sqlite3Fts3FreeDeferredTokens(Fts3Cursor *pCsr){ Fts3DeferredToken *pNext; for(pDef=pCsr->pDeferred; pDef; pDef=pNext){ pNext = pDef->pNext; - sqlite3_free(pDef->pList); + fts3PendingListDelete(pDef->pList); sqlite3_free(pDef); } pCsr->pDeferred = 0; @@ -120214,6 +122641,33 @@ SQLITE_PRIVATE int sqlite3Fts3CacheDeferredDoclists(Fts3Cursor *pCsr){ return rc; } +SQLITE_PRIVATE int sqlite3Fts3DeferredTokenList( + Fts3DeferredToken *p, + char **ppData, + int *pnData +){ + char *pRet; + int nSkip; + sqlite3_int64 dummy; + + *ppData = 0; + *pnData = 0; + + if( p->pList==0 ){ + return SQLITE_OK; + } + + pRet = (char *)sqlite3_malloc(p->pList->nData); + if( !pRet ) return SQLITE_NOMEM; + + nSkip = sqlite3Fts3GetVarint(p->pList->aData, &dummy); + *pnData = p->pList->nData - nSkip; + *ppData = pRet; + + memcpy(pRet, &p->pList->aData[nSkip], *pnData); + return SQLITE_OK; +} + /* ** Add an entry for token pToken to the pCsr->pDeferred list. */ @@ -120239,6 +122693,40 @@ SQLITE_PRIVATE int sqlite3Fts3DeferToken( return SQLITE_OK; } +/* +** SQLite value pRowid contains the rowid of a row that may or may not be +** present in the FTS3 table. If it is, delete it and adjust the contents +** of subsiduary data structures accordingly. +*/ +static int fts3DeleteByRowid( + Fts3Table *p, + sqlite3_value *pRowid, + int *pnDoc, + u32 *aSzDel +){ + int isEmpty = 0; + int rc = fts3IsEmpty(p, pRowid, &isEmpty); + if( rc==SQLITE_OK ){ + if( isEmpty ){ + /* Deleting this row means the whole table is empty. In this case + ** delete the contents of all three tables and throw away any + ** data in the pendingTerms hash table. */ + rc = fts3DeleteAll(p); + *pnDoc = *pnDoc - 1; + }else{ + sqlite3_int64 iRemove = sqlite3_value_int64(pRowid); + rc = fts3PendingTermsDocid(p, iRemove); + fts3DeleteTerms(&rc, p, pRowid, aSzDel); + fts3SqlExec(&rc, p, SQL_DELETE_CONTENT, &pRowid); + if( sqlite3_changes(p->db) ) *pnDoc = *pnDoc - 1; + if( p->bHasDocsize ){ + fts3SqlExec(&rc, p, SQL_DELETE_DOCSIZE, &pRowid); + } + } + } + + return rc; +} /* ** This function does the work for the xUpdate method of FTS3 virtual @@ -120254,49 +122742,97 @@ SQLITE_PRIVATE int sqlite3Fts3UpdateMethod( int rc = SQLITE_OK; /* Return Code */ int isRemove = 0; /* True for an UPDATE or DELETE */ sqlite3_int64 iRemove = 0; /* Rowid removed by UPDATE or DELETE */ - u32 *aSzIns; /* Sizes of inserted documents */ + u32 *aSzIns = 0; /* Sizes of inserted documents */ u32 *aSzDel; /* Sizes of deleted documents */ int nChng = 0; /* Net change in number of documents */ + int bInsertDone = 0; assert( p->pSegments==0 ); + /* Check for a "special" INSERT operation. One of the form: + ** + ** INSERT INTO xyz(xyz) VALUES('command'); + */ + if( nArg>1 + && sqlite3_value_type(apVal[0])==SQLITE_NULL + && sqlite3_value_type(apVal[p->nColumn+2])!=SQLITE_NULL + ){ + rc = fts3SpecialInsert(p, apVal[p->nColumn+2]); + goto update_out; + } + /* Allocate space to hold the change in document sizes */ aSzIns = sqlite3_malloc( sizeof(aSzIns[0])*(p->nColumn+1)*2 ); - if( aSzIns==0 ) return SQLITE_NOMEM; + if( aSzIns==0 ){ + rc = SQLITE_NOMEM; + goto update_out; + } aSzDel = &aSzIns[p->nColumn+1]; memset(aSzIns, 0, sizeof(aSzIns[0])*(p->nColumn+1)*2); - /* If this is a DELETE or UPDATE operation, remove the old record. */ - if( sqlite3_value_type(apVal[0])!=SQLITE_NULL ){ - int isEmpty = 0; - rc = fts3IsEmpty(p, apVal, &isEmpty); - if( rc==SQLITE_OK ){ - if( isEmpty ){ - /* Deleting this row means the whole table is empty. In this case - ** delete the contents of all three tables and throw away any - ** data in the pendingTerms hash table. - */ - rc = fts3DeleteAll(p); + /* If this is an INSERT operation, or an UPDATE that modifies the rowid + ** value, then this operation requires constraint handling. + ** + ** If the on-conflict mode is REPLACE, this means that the existing row + ** should be deleted from the database before inserting the new row. Or, + ** if the on-conflict mode is other than REPLACE, then this method must + ** detect the conflict and return SQLITE_CONSTRAINT before beginning to + ** modify the database file. + */ + if( nArg>1 ){ + /* Find the value object that holds the new rowid value. */ + sqlite3_value *pNewRowid = apVal[3+p->nColumn]; + if( sqlite3_value_type(pNewRowid)==SQLITE_NULL ){ + pNewRowid = apVal[1]; + } + + if( sqlite3_value_type(pNewRowid)!=SQLITE_NULL && ( + sqlite3_value_type(apVal[0])==SQLITE_NULL + || sqlite3_value_int64(apVal[0])!=sqlite3_value_int64(pNewRowid) + )){ + /* The new rowid is not NULL (in this case the rowid will be + ** automatically assigned and there is no chance of a conflict), and + ** the statement is either an INSERT or an UPDATE that modifies the + ** rowid column. So if the conflict mode is REPLACE, then delete any + ** existing row with rowid=pNewRowid. + ** + ** Or, if the conflict mode is not REPLACE, insert the new record into + ** the %_content table. If we hit the duplicate rowid constraint (or any + ** other error) while doing so, return immediately. + ** + ** This branch may also run if pNewRowid contains a value that cannot + ** be losslessly converted to an integer. In this case, the eventual + ** call to fts3InsertData() (either just below or further on in this + ** function) will return SQLITE_MISMATCH. If fts3DeleteByRowid is + ** invoked, it will delete zero rows (since no row will have + ** docid=$pNewRowid if $pNewRowid is not an integer value). + */ + if( sqlite3_vtab_on_conflict(p->db)==SQLITE_REPLACE ){ + rc = fts3DeleteByRowid(p, pNewRowid, &nChng, aSzDel); }else{ - isRemove = 1; - iRemove = sqlite3_value_int64(apVal[0]); - rc = fts3PendingTermsDocid(p, iRemove); - fts3DeleteTerms(&rc, p, apVal, aSzDel); - fts3SqlExec(&rc, p, SQL_DELETE_CONTENT, apVal); - if( p->bHasDocsize ){ - fts3SqlExec(&rc, p, SQL_DELETE_DOCSIZE, apVal); - } - nChng--; + rc = fts3InsertData(p, apVal, pRowid); + bInsertDone = 1; } } - }else if( sqlite3_value_type(apVal[p->nColumn+2])!=SQLITE_NULL ){ - sqlite3_free(aSzIns); - return fts3SpecialInsert(p, apVal[p->nColumn+2]); + } + if( rc!=SQLITE_OK ){ + goto update_out; + } + + /* If this is a DELETE or UPDATE operation, remove the old record. */ + if( sqlite3_value_type(apVal[0])!=SQLITE_NULL ){ + assert( sqlite3_value_type(apVal[0])==SQLITE_INTEGER ); + rc = fts3DeleteByRowid(p, apVal[0], &nChng, aSzDel); + isRemove = 1; + iRemove = sqlite3_value_int64(apVal[0]); } /* If this is an INSERT or UPDATE operation, insert the new record. */ if( nArg>1 && rc==SQLITE_OK ){ - rc = fts3InsertData(p, apVal, pRowid); + if( bInsertDone==0 ){ + rc = fts3InsertData(p, apVal, pRowid); + if( rc==SQLITE_CONSTRAINT ) rc = SQLITE_CORRUPT_VTAB; + } if( rc==SQLITE_OK && (!isRemove || *pRowid!=iRemove) ){ rc = fts3PendingTermsDocid(p, *pRowid); } @@ -120313,6 +122849,7 @@ SQLITE_PRIVATE int sqlite3Fts3UpdateMethod( fts3UpdateDocTotals(&rc, p, aSzIns, aSzDel, nChng); } + update_out: sqlite3_free(aSzIns); sqlite3Fts3SegmentsClose(p); return rc; @@ -120327,12 +122864,10 @@ SQLITE_PRIVATE int sqlite3Fts3Optimize(Fts3Table *p){ int rc; rc = sqlite3_exec(p->db, "SAVEPOINT fts3", 0, 0, 0); if( rc==SQLITE_OK ){ - rc = fts3SegmentMerge(p, FTS3_SEGCURSOR_ALL); - if( rc==SQLITE_OK ){ - rc = sqlite3_exec(p->db, "RELEASE fts3", 0, 0, 0); - if( rc==SQLITE_OK ){ - sqlite3Fts3PendingTermsClear(p); - } + rc = fts3DoOptimize(p, 1); + if( rc==SQLITE_OK || rc==SQLITE_DONE ){ + int rc2 = sqlite3_exec(p->db, "RELEASE fts3", 0, 0, 0); + if( rc2!=SQLITE_OK ) rc = rc2; }else{ sqlite3_exec(p->db, "ROLLBACK TO fts3", 0, 0, 0); sqlite3_exec(p->db, "RELEASE fts3", 0, 0, 0); @@ -120522,71 +123057,19 @@ static int fts3ExprIterate( } /* -** The argument to this function is always a phrase node. Its doclist -** (Fts3Expr.aDoclist[]) and the doclists associated with all phrase nodes -** to the left of this one in the query tree have already been loaded. -** -** If this phrase node is part of a series of phrase nodes joined by -** NEAR operators (and is not the left-most of said series), then elements are -** removed from the phrases doclist consistent with the NEAR restriction. If -** required, elements may be removed from the doclists of phrases to the -** left of this one that are part of the same series of NEAR operator -** connected phrases. -** -** If an OOM error occurs, SQLITE_NOMEM is returned. Otherwise, SQLITE_OK. -*/ -static int fts3ExprNearTrim(Fts3Expr *pExpr){ - int rc = SQLITE_OK; - Fts3Expr *pParent = pExpr->pParent; - - assert( pExpr->eType==FTSQUERY_PHRASE ); - while( rc==SQLITE_OK - && pParent - && pParent->eType==FTSQUERY_NEAR - && pParent->pRight==pExpr - ){ - /* This expression (pExpr) is the right-hand-side of a NEAR operator. - ** Find the expression to the left of the same operator. - */ - int nNear = pParent->nNear; - Fts3Expr *pLeft = pParent->pLeft; - - if( pLeft->eType!=FTSQUERY_PHRASE ){ - assert( pLeft->eType==FTSQUERY_NEAR ); - assert( pLeft->pRight->eType==FTSQUERY_PHRASE ); - pLeft = pLeft->pRight; - } - - rc = sqlite3Fts3ExprNearTrim(pLeft, pExpr, nNear); - - pExpr = pLeft; - pParent = pExpr->pParent; - } - - return rc; -} - -/* ** This is an fts3ExprIterate() callback used while loading the doclists ** for each phrase into Fts3Expr.aDoclist[]/nDoclist. See also ** fts3ExprLoadDoclists(). */ static int fts3ExprLoadDoclistsCb(Fts3Expr *pExpr, int iPhrase, void *ctx){ int rc = SQLITE_OK; + Fts3Phrase *pPhrase = pExpr->pPhrase; LoadDoclistCtx *p = (LoadDoclistCtx *)ctx; UNUSED_PARAMETER(iPhrase); p->nPhrase++; - p->nToken += pExpr->pPhrase->nToken; - - if( pExpr->isLoaded==0 ){ - rc = sqlite3Fts3ExprLoadDoclist(p->pCsr, pExpr); - pExpr->isLoaded = 1; - if( rc==SQLITE_OK ){ - rc = fts3ExprNearTrim(pExpr); - } - } + p->nToken += pPhrase->nToken; return rc; } @@ -120760,7 +123243,7 @@ static int fts3SnippetFindPositions(Fts3Expr *pExpr, int iPhrase, void *ctx){ pPhrase->nToken = pExpr->pPhrase->nToken; - pCsr = sqlite3Fts3FindPositions(pExpr, p->pCsr->iPrevId, p->iCol); + pCsr = sqlite3Fts3EvalPhrasePoslist(p->pCsr, pExpr, p->iCol); if( pCsr ){ int iFirst = 0; pPhrase->pList = pCsr; @@ -121117,26 +123600,6 @@ static int fts3ColumnlistCount(char **ppCollist){ return nEntry; } -static void fts3LoadColumnlistCounts(char **pp, u32 *aOut, int isGlobal){ - char *pCsr = *pp; - while( *pCsr ){ - int nHit; - sqlite3_int64 iCol = 0; - if( *pCsr==0x01 ){ - pCsr++; - pCsr += sqlite3Fts3GetVarint(pCsr, &iCol); - } - nHit = fts3ColumnlistCount(&pCsr); - assert( nHit>0 ); - if( isGlobal ){ - aOut[iCol*3+1]++; - } - aOut[iCol*3] += nHit; - } - pCsr++; - *pp = pCsr; -} - /* ** fts3ExprIterate() callback used to collect the "global" matchinfo stats ** for a single query. @@ -121170,48 +123633,9 @@ static int fts3ExprGlobalHitsCb( void *pCtx /* Pointer to MatchInfo structure */ ){ MatchInfo *p = (MatchInfo *)pCtx; - Fts3Cursor *pCsr = p->pCursor; - char *pIter; - char *pEnd; - char *pFree = 0; - u32 *aOut = &p->aMatchinfo[3*iPhrase*p->nCol]; - - assert( pExpr->isLoaded ); - assert( pExpr->eType==FTSQUERY_PHRASE ); - - if( pCsr->pDeferred ){ - Fts3Phrase *pPhrase = pExpr->pPhrase; - int ii; - for(ii=0; ii<pPhrase->nToken; ii++){ - if( pPhrase->aToken[ii].bFulltext ) break; - } - if( ii<pPhrase->nToken ){ - int nFree = 0; - int rc = sqlite3Fts3ExprLoadFtDoclist(pCsr, pExpr, &pFree, &nFree); - if( rc!=SQLITE_OK ) return rc; - pIter = pFree; - pEnd = &pFree[nFree]; - }else{ - int iCol; /* Column index */ - for(iCol=0; iCol<p->nCol; iCol++){ - aOut[iCol*3 + 1] = (u32)p->nDoc; - aOut[iCol*3 + 2] = (u32)p->nDoc; - } - return SQLITE_OK; - } - }else{ - pIter = pExpr->aDoclist; - pEnd = &pExpr->aDoclist[pExpr->nDoclist]; - } - - /* Fill in the global hit count matrix row for this phrase. */ - while( pIter<pEnd ){ - while( *pIter++ & 0x80 ); /* Skip past docid. */ - fts3LoadColumnlistCounts(&pIter, &aOut[1], 1); - } - - sqlite3_free(pFree); - return SQLITE_OK; + return sqlite3Fts3EvalPhraseStats( + p->pCursor, pExpr, &p->aMatchinfo[3*iPhrase*p->nCol] + ); } /* @@ -121228,14 +123652,13 @@ static int fts3ExprLocalHitsCb( int iStart = iPhrase * p->nCol * 3; int i; - for(i=0; i<p->nCol; i++) p->aMatchinfo[iStart+i*3] = 0; - - if( pExpr->aDoclist ){ + for(i=0; i<p->nCol; i++){ char *pCsr; - - pCsr = sqlite3Fts3FindPositions(pExpr, p->pCursor->iPrevId, -1); + pCsr = sqlite3Fts3EvalPhrasePoslist(p->pCursor, pExpr, i); if( pCsr ){ - fts3LoadColumnlistCounts(&pCsr, &p->aMatchinfo[iStart], 0); + p->aMatchinfo[iStart+i*3] = fts3ColumnlistCount(&pCsr); + }else{ + p->aMatchinfo[iStart+i*3] = 0; } } @@ -121305,7 +123728,7 @@ static int fts3MatchinfoSelectDoctotal( a = sqlite3_column_blob(pStmt, 0); a += sqlite3Fts3GetVarint(a, &nDoc); - if( nDoc==0 ) return SQLITE_CORRUPT; + if( nDoc==0 ) return SQLITE_CORRUPT_VTAB; *pnDoc = (u32)nDoc; if( paLen ) *paLen = a; @@ -121321,9 +123744,8 @@ static int fts3MatchinfoSelectDoctotal( typedef struct LcsIterator LcsIterator; struct LcsIterator { Fts3Expr *pExpr; /* Pointer to phrase expression */ - char *pRead; /* Cursor used to iterate through aDoclist */ int iPosOffset; /* Tokens count up to end of this phrase */ - int iCol; /* Current column number */ + char *pRead; /* Cursor used to iterate through aDoclist */ int iPos; /* Current position */ }; @@ -121354,17 +123776,10 @@ static int fts3LcsIteratorAdvance(LcsIterator *pIter){ int rc = 0; pRead += sqlite3Fts3GetVarint(pRead, &iRead); - if( iRead==0 ){ - pIter->iCol = LCS_ITERATOR_FINISHED; + if( iRead==0 || iRead==1 ){ + pRead = 0; rc = 1; }else{ - if( iRead==1 ){ - pRead += sqlite3Fts3GetVarint(pRead, &iRead); - pIter->iCol = (int)iRead; - pIter->iPos = pIter->iPosOffset; - pRead += sqlite3Fts3GetVarint(pRead, &iRead); - rc = 1; - } pIter->iPos += (int)(iRead-2); } @@ -121396,42 +123811,34 @@ static int fts3MatchinfoLcs(Fts3Cursor *pCsr, MatchInfo *pInfo){ if( !aIter ) return SQLITE_NOMEM; memset(aIter, 0, sizeof(LcsIterator) * pCsr->nPhrase); (void)fts3ExprIterate(pCsr->pExpr, fts3MatchinfoLcsCb, (void*)aIter); + for(i=0; i<pInfo->nPhrase; i++){ LcsIterator *pIter = &aIter[i]; nToken -= pIter->pExpr->pPhrase->nToken; pIter->iPosOffset = nToken; - pIter->pRead = sqlite3Fts3FindPositions(pIter->pExpr, pCsr->iPrevId, -1); - if( pIter->pRead ){ - pIter->iPos = pIter->iPosOffset; - fts3LcsIteratorAdvance(&aIter[i]); - }else{ - pIter->iCol = LCS_ITERATOR_FINISHED; - } } for(iCol=0; iCol<pInfo->nCol; iCol++){ int nLcs = 0; /* LCS value for this column */ int nLive = 0; /* Number of iterators in aIter not at EOF */ - /* Loop through the iterators in aIter[]. Set nLive to the number of - ** iterators that point to a position-list corresponding to column iCol. - */ for(i=0; i<pInfo->nPhrase; i++){ - assert( aIter[i].iCol>=iCol ); - if( aIter[i].iCol==iCol ) nLive++; + LcsIterator *pIt = &aIter[i]; + pIt->pRead = sqlite3Fts3EvalPhrasePoslist(pCsr, pIt->pExpr, iCol); + if( pIt->pRead ){ + pIt->iPos = pIt->iPosOffset; + fts3LcsIteratorAdvance(&aIter[i]); + nLive++; + } } - /* The following loop runs until all iterators in aIter[] have finished - ** iterating through positions in column iCol. Exactly one of the - ** iterators is advanced each time the body of the loop is run. - */ while( nLive>0 ){ LcsIterator *pAdv = 0; /* The iterator to advance by one position */ int nThisLcs = 0; /* LCS for the current iterator positions */ for(i=0; i<pInfo->nPhrase; i++){ LcsIterator *pIter = &aIter[i]; - if( iCol!=pIter->iCol ){ + if( pIter->pRead==0 ){ /* This iterator is already at EOF for this column. */ nThisLcs = 0; }else{ @@ -121497,7 +123904,7 @@ static int fts3MatchinfoValues( case FTS3_MATCHINFO_NDOC: if( bGlobal ){ - sqlite3_int64 nDoc; + sqlite3_int64 nDoc = 0; rc = fts3MatchinfoSelectDoctotal(pTab, &pSelect, &nDoc, 0); pInfo->aMatchinfo[0] = (u32)nDoc; } @@ -121753,6 +124160,7 @@ struct TermOffset { }; struct TermOffsetCtx { + Fts3Cursor *pCsr; int iCol; /* Column of table to populate aTerm for */ int iTerm; sqlite3_int64 iDocid; @@ -121770,7 +124178,7 @@ static int fts3ExprTermOffsetInit(Fts3Expr *pExpr, int iPhrase, void *ctx){ int iPos = 0; /* First position in position-list */ UNUSED_PARAMETER(iPhrase); - pList = sqlite3Fts3FindPositions(pExpr, p->iDocid, p->iCol); + pList = sqlite3Fts3EvalPhrasePoslist(p->pCsr, pExpr, p->iCol); nTerm = pExpr->pPhrase->nToken; if( pList ){ fts3GetDeltaPosition(&pList, &iPos); @@ -121823,6 +124231,7 @@ SQLITE_PRIVATE void sqlite3Fts3Offsets( goto offsets_out; } sCtx.iDocid = pCsr->iPrevId; + sCtx.pCsr = pCsr; /* Loop through the table columns, appending offset information to ** string-buffer res for each column. @@ -121898,7 +124307,7 @@ SQLITE_PRIVATE void sqlite3Fts3Offsets( ); rc = fts3StringAppend(&res, aBuffer, -1); }else if( rc==SQLITE_DONE ){ - rc = SQLITE_CORRUPT; + rc = SQLITE_CORRUPT_VTAB; } } } @@ -122486,17 +124895,17 @@ nodeAcquire( if( pNode && iNode==1 ){ pRtree->iDepth = readInt16(pNode->zData); if( pRtree->iDepth>RTREE_MAX_DEPTH ){ - rc = SQLITE_CORRUPT; + rc = SQLITE_CORRUPT_VTAB; } } /* If no error has occurred so far, check if the "number of entries" ** field on the node is too large. If so, set the return code to - ** SQLITE_CORRUPT. + ** SQLITE_CORRUPT_VTAB. */ if( pNode && rc==SQLITE_OK ){ if( NCELL(pNode)>((pRtree->iNodeSize-4)/pRtree->nBytesPerCell) ){ - rc = SQLITE_CORRUPT; + rc = SQLITE_CORRUPT_VTAB; } } @@ -122504,7 +124913,7 @@ nodeAcquire( if( pNode!=0 ){ nodeHashInsert(pRtree, pNode); }else{ - rc = SQLITE_CORRUPT; + rc = SQLITE_CORRUPT_VTAB; } *ppNode = pNode; }else{ @@ -123031,7 +125440,7 @@ static int nodeRowidIndex( return SQLITE_OK; } } - return SQLITE_CORRUPT; + return SQLITE_CORRUPT_VTAB; } /* @@ -123390,7 +125799,7 @@ static float cellArea(Rtree *pRtree, RtreeCell *p){ float area = 1.0; int ii; for(ii=0; ii<(pRtree->nDim*2); ii+=2){ - area = area * (DCOORD(p->aCoord[ii+1]) - DCOORD(p->aCoord[ii])); + area = (float)(area * (DCOORD(p->aCoord[ii+1]) - DCOORD(p->aCoord[ii]))); } return area; } @@ -123403,7 +125812,7 @@ static float cellMargin(Rtree *pRtree, RtreeCell *p){ float margin = 0.0; int ii; for(ii=0; ii<(pRtree->nDim*2); ii+=2){ - margin += (DCOORD(p->aCoord[ii+1]) - DCOORD(p->aCoord[ii])); + margin += (float)(DCOORD(p->aCoord[ii+1]) - DCOORD(p->aCoord[ii])); } return margin; } @@ -123488,7 +125897,7 @@ static float cellOverlap( o = 0.0; break; }else{ - o = o * (x2-x1); + o = o * (float)(x2-x1); } } overlap += o; @@ -123507,12 +125916,12 @@ static float cellOverlapEnlargement( int nCell, int iExclude ){ - float before; - float after; + double before; + double after; before = cellOverlap(pRtree, p, aCell, nCell, iExclude); cellUnion(pRtree, p, pInsert); after = cellOverlap(pRtree, p, aCell, nCell, iExclude); - return after-before; + return (float)(after-before); } #endif @@ -123534,11 +125943,11 @@ static int ChooseLeaf( for(ii=0; rc==SQLITE_OK && ii<(pRtree->iDepth-iHeight); ii++){ int iCell; - sqlite3_int64 iBest; + sqlite3_int64 iBest = 0; - float fMinGrowth; - float fMinArea; - float fMinOverlap; + float fMinGrowth = 0.0; + float fMinArea = 0.0; + float fMinOverlap = 0.0; int nCell = NCELL(pNode); RtreeCell cell; @@ -123626,7 +126035,7 @@ static int AdjustTree( int iCell; if( nodeParentIndex(pRtree, p, &iCell) ){ - return SQLITE_CORRUPT; + return SQLITE_CORRUPT_VTAB; } nodeGetCell(pRtree, pParent, iCell, &cell); @@ -123968,9 +126377,9 @@ static int splitNodeStartree( int *aSpare; int ii; - int iBestDim; - int iBestSplit; - float fBestMargin; + int iBestDim = 0; + int iBestSplit = 0; + float fBestMargin = 0.0; int nByte = (pRtree->nDim+1)*(sizeof(int*)+nCell*sizeof(int)); @@ -123992,9 +126401,9 @@ static int splitNodeStartree( for(ii=0; ii<pRtree->nDim; ii++){ float margin = 0.0; - float fBestOverlap; - float fBestArea; - int iBestLeft; + float fBestOverlap = 0.0; + float fBestArea = 0.0; + int iBestLeft = 0; int nLeft; for( @@ -124298,7 +126707,7 @@ static int fixLeafParent(Rtree *pRtree, RtreeNode *pLeaf){ } rc = sqlite3_reset(pRtree->pReadParent); if( rc==SQLITE_OK ) rc = rc2; - if( rc==SQLITE_OK && !pChild->pParent ) rc = SQLITE_CORRUPT; + if( rc==SQLITE_OK && !pChild->pParent ) rc = SQLITE_CORRUPT_VTAB; pChild = pChild->pParent; } return rc; @@ -124309,7 +126718,7 @@ static int deleteCell(Rtree *, RtreeNode *, int, int); static int removeNode(Rtree *pRtree, RtreeNode *pNode, int iHeight){ int rc; int rc2; - RtreeNode *pParent; + RtreeNode *pParent = 0; int iCell; assert( pNode->nRef==1 ); @@ -124457,19 +126866,19 @@ static int Reinsert( } aOrder[ii] = ii; for(iDim=0; iDim<pRtree->nDim; iDim++){ - aCenterCoord[iDim] += DCOORD(aCell[ii].aCoord[iDim*2]); - aCenterCoord[iDim] += DCOORD(aCell[ii].aCoord[iDim*2+1]); + aCenterCoord[iDim] += (float)DCOORD(aCell[ii].aCoord[iDim*2]); + aCenterCoord[iDim] += (float)DCOORD(aCell[ii].aCoord[iDim*2+1]); } } for(iDim=0; iDim<pRtree->nDim; iDim++){ - aCenterCoord[iDim] = aCenterCoord[iDim]/((float)nCell*2.0); + aCenterCoord[iDim] = (float)(aCenterCoord[iDim]/((float)nCell*2.0)); } for(ii=0; ii<nCell; ii++){ aDistance[ii] = 0.0; for(iDim=0; iDim<pRtree->nDim; iDim++){ - float coord = DCOORD(aCell[ii].aCoord[iDim*2+1]) - - DCOORD(aCell[ii].aCoord[iDim*2]); + float coord = (float)(DCOORD(aCell[ii].aCoord[iDim*2+1]) - + DCOORD(aCell[ii].aCoord[iDim*2])); aDistance[ii] += (coord-aCenterCoord[iDim])*(coord-aCenterCoord[iDim]); } } @@ -124568,10 +126977,10 @@ static int reinsertNodeContent(Rtree *pRtree, RtreeNode *pNode){ /* Find a node to store this cell in. pNode->iNode currently contains ** the height of the sub-tree headed by the cell. */ - rc = ChooseLeaf(pRtree, &cell, pNode->iNode, &pInsert); + rc = ChooseLeaf(pRtree, &cell, (int)pNode->iNode, &pInsert); if( rc==SQLITE_OK ){ int rc2; - rc = rtreeInsertCell(pRtree, pInsert, &cell, pNode->iNode); + rc = rtreeInsertCell(pRtree, pInsert, &cell, (int)pNode->iNode); rc2 = nodeRelease(pRtree, pInsert); if( rc==SQLITE_OK ){ rc = rc2; @@ -124595,113 +127004,119 @@ static int newRowid(Rtree *pRtree, i64 *piRowid){ } /* -** The xUpdate method for rtree module virtual tables. +** Remove the entry with rowid=iDelete from the r-tree structure. */ -static int rtreeUpdate( - sqlite3_vtab *pVtab, - int nData, - sqlite3_value **azData, - sqlite_int64 *pRowid -){ - Rtree *pRtree = (Rtree *)pVtab; - int rc = SQLITE_OK; +static int rtreeDeleteRowid(Rtree *pRtree, sqlite3_int64 iDelete){ + int rc; /* Return code */ + RtreeNode *pLeaf; /* Leaf node containing record iDelete */ + int iCell; /* Index of iDelete cell in pLeaf */ + RtreeNode *pRoot; /* Root node of rtree structure */ - rtreeReference(pRtree); - assert(nData>=1); + /* Obtain a reference to the root node to initialise Rtree.iDepth */ + rc = nodeAcquire(pRtree, 1, 0, &pRoot); - /* If azData[0] is not an SQL NULL value, it is the rowid of a - ** record to delete from the r-tree table. The following block does - ** just that. + /* Obtain a reference to the leaf node that contains the entry + ** about to be deleted. */ - if( sqlite3_value_type(azData[0])!=SQLITE_NULL ){ - i64 iDelete; /* The rowid to delete */ - RtreeNode *pLeaf; /* Leaf node containing record iDelete */ - int iCell; /* Index of iDelete cell in pLeaf */ - RtreeNode *pRoot; - - /* Obtain a reference to the root node to initialise Rtree.iDepth */ - rc = nodeAcquire(pRtree, 1, 0, &pRoot); + if( rc==SQLITE_OK ){ + rc = findLeafNode(pRtree, iDelete, &pLeaf); + } - /* Obtain a reference to the leaf node that contains the entry - ** about to be deleted. - */ + /* Delete the cell in question from the leaf node. */ + if( rc==SQLITE_OK ){ + int rc2; + rc = nodeRowidIndex(pRtree, pLeaf, iDelete, &iCell); if( rc==SQLITE_OK ){ - iDelete = sqlite3_value_int64(azData[0]); - rc = findLeafNode(pRtree, iDelete, &pLeaf); + rc = deleteCell(pRtree, pLeaf, iCell, 0); } - - /* Delete the cell in question from the leaf node. */ + rc2 = nodeRelease(pRtree, pLeaf); if( rc==SQLITE_OK ){ - int rc2; - rc = nodeRowidIndex(pRtree, pLeaf, iDelete, &iCell); - if( rc==SQLITE_OK ){ - rc = deleteCell(pRtree, pLeaf, iCell, 0); - } - rc2 = nodeRelease(pRtree, pLeaf); - if( rc==SQLITE_OK ){ - rc = rc2; - } + rc = rc2; } + } - /* Delete the corresponding entry in the <rtree>_rowid table. */ - if( rc==SQLITE_OK ){ - sqlite3_bind_int64(pRtree->pDeleteRowid, 1, iDelete); - sqlite3_step(pRtree->pDeleteRowid); - rc = sqlite3_reset(pRtree->pDeleteRowid); - } + /* Delete the corresponding entry in the <rtree>_rowid table. */ + if( rc==SQLITE_OK ){ + sqlite3_bind_int64(pRtree->pDeleteRowid, 1, iDelete); + sqlite3_step(pRtree->pDeleteRowid); + rc = sqlite3_reset(pRtree->pDeleteRowid); + } - /* Check if the root node now has exactly one child. If so, remove - ** it, schedule the contents of the child for reinsertion and - ** reduce the tree height by one. - ** - ** This is equivalent to copying the contents of the child into - ** the root node (the operation that Gutman's paper says to perform - ** in this scenario). - */ - if( rc==SQLITE_OK && pRtree->iDepth>0 && NCELL(pRoot)==1 ){ - int rc2; - RtreeNode *pChild; - i64 iChild = nodeGetRowid(pRtree, pRoot, 0); - rc = nodeAcquire(pRtree, iChild, pRoot, &pChild); - if( rc==SQLITE_OK ){ - rc = removeNode(pRtree, pChild, pRtree->iDepth-1); - } - rc2 = nodeRelease(pRtree, pChild); - if( rc==SQLITE_OK ) rc = rc2; - if( rc==SQLITE_OK ){ - pRtree->iDepth--; - writeInt16(pRoot->zData, pRtree->iDepth); - pRoot->isDirty = 1; - } + /* Check if the root node now has exactly one child. If so, remove + ** it, schedule the contents of the child for reinsertion and + ** reduce the tree height by one. + ** + ** This is equivalent to copying the contents of the child into + ** the root node (the operation that Gutman's paper says to perform + ** in this scenario). + */ + if( rc==SQLITE_OK && pRtree->iDepth>0 && NCELL(pRoot)==1 ){ + int rc2; + RtreeNode *pChild; + i64 iChild = nodeGetRowid(pRtree, pRoot, 0); + rc = nodeAcquire(pRtree, iChild, pRoot, &pChild); + if( rc==SQLITE_OK ){ + rc = removeNode(pRtree, pChild, pRtree->iDepth-1); } - - /* Re-insert the contents of any underfull nodes removed from the tree. */ - for(pLeaf=pRtree->pDeleted; pLeaf; pLeaf=pRtree->pDeleted){ - if( rc==SQLITE_OK ){ - rc = reinsertNodeContent(pRtree, pLeaf); - } - pRtree->pDeleted = pLeaf->pNext; - sqlite3_free(pLeaf); + rc2 = nodeRelease(pRtree, pChild); + if( rc==SQLITE_OK ) rc = rc2; + if( rc==SQLITE_OK ){ + pRtree->iDepth--; + writeInt16(pRoot->zData, pRtree->iDepth); + pRoot->isDirty = 1; } + } - /* Release the reference to the root node. */ + /* Re-insert the contents of any underfull nodes removed from the tree. */ + for(pLeaf=pRtree->pDeleted; pLeaf; pLeaf=pRtree->pDeleted){ if( rc==SQLITE_OK ){ - rc = nodeRelease(pRtree, pRoot); - }else{ - nodeRelease(pRtree, pRoot); + rc = reinsertNodeContent(pRtree, pLeaf); } + pRtree->pDeleted = pLeaf->pNext; + sqlite3_free(pLeaf); } - /* If the azData[] array contains more than one element, elements - ** (azData[2]..azData[argc-1]) contain a new record to insert into - ** the r-tree structure. + /* Release the reference to the root node. */ + if( rc==SQLITE_OK ){ + rc = nodeRelease(pRtree, pRoot); + }else{ + nodeRelease(pRtree, pRoot); + } + + return rc; +} + +/* +** The xUpdate method for rtree module virtual tables. +*/ +static int rtreeUpdate( + sqlite3_vtab *pVtab, + int nData, + sqlite3_value **azData, + sqlite_int64 *pRowid +){ + Rtree *pRtree = (Rtree *)pVtab; + int rc = SQLITE_OK; + RtreeCell cell; /* New cell to insert if nData>1 */ + int bHaveRowid = 0; /* Set to 1 after new rowid is determined */ + + rtreeReference(pRtree); + assert(nData>=1); + + /* Constraint handling. A write operation on an r-tree table may return + ** SQLITE_CONSTRAINT for two reasons: + ** + ** 1. A duplicate rowid value, or + ** 2. The supplied data violates the "x2>=x1" constraint. + ** + ** In the first case, if the conflict-handling mode is REPLACE, then + ** the conflicting row can be removed before proceeding. In the second + ** case, SQLITE_CONSTRAINT must be returned regardless of the + ** conflict-handling mode specified by the user. */ - if( rc==SQLITE_OK && nData>1 ){ - /* Insert a new record into the r-tree */ - RtreeCell cell; + if( nData>1 ){ int ii; - RtreeNode *pLeaf; /* Populate the cell.aCoord[] array. The first coordinate is azData[3]. */ assert( nData==(pRtree->nDim*2 + 3) ); @@ -124725,18 +127140,49 @@ static int rtreeUpdate( } } - /* Figure out the rowid of the new row. */ - if( sqlite3_value_type(azData[2])==SQLITE_NULL ){ - rc = newRowid(pRtree, &cell.iRowid); - }else{ + /* If a rowid value was supplied, check if it is already present in + ** the table. If so, the constraint has failed. */ + if( sqlite3_value_type(azData[2])!=SQLITE_NULL ){ cell.iRowid = sqlite3_value_int64(azData[2]); - sqlite3_bind_int64(pRtree->pReadRowid, 1, cell.iRowid); - if( SQLITE_ROW==sqlite3_step(pRtree->pReadRowid) ){ - sqlite3_reset(pRtree->pReadRowid); - rc = SQLITE_CONSTRAINT; - goto constraint; + if( sqlite3_value_type(azData[0])==SQLITE_NULL + || sqlite3_value_int64(azData[0])!=cell.iRowid + ){ + int steprc; + sqlite3_bind_int64(pRtree->pReadRowid, 1, cell.iRowid); + steprc = sqlite3_step(pRtree->pReadRowid); + rc = sqlite3_reset(pRtree->pReadRowid); + if( SQLITE_ROW==steprc ){ + if( sqlite3_vtab_on_conflict(pRtree->db)==SQLITE_REPLACE ){ + rc = rtreeDeleteRowid(pRtree, cell.iRowid); + }else{ + rc = SQLITE_CONSTRAINT; + goto constraint; + } + } } - rc = sqlite3_reset(pRtree->pReadRowid); + bHaveRowid = 1; + } + } + + /* If azData[0] is not an SQL NULL value, it is the rowid of a + ** record to delete from the r-tree table. The following block does + ** just that. + */ + if( sqlite3_value_type(azData[0])!=SQLITE_NULL ){ + rc = rtreeDeleteRowid(pRtree, sqlite3_value_int64(azData[0])); + } + + /* If the azData[] array contains more than one element, elements + ** (azData[2]..azData[argc-1]) contain a new record to insert into + ** the r-tree structure. + */ + if( rc==SQLITE_OK && nData>1 ){ + /* Insert the new record into the r-tree */ + RtreeNode *pLeaf; + + /* Figure out the rowid of the new row. */ + if( bHaveRowid==0 ){ + rc = newRowid(pRtree, &cell.iRowid); } *pRowid = cell.iRowid; @@ -124781,7 +127227,7 @@ static int rtreeRename(sqlite3_vtab *pVtab, const char *zNewName){ } static sqlite3_module rtreeModule = { - 0, /* iVersion */ + 0, /* iVersion */ rtreeCreate, /* xCreate - create a table */ rtreeConnect, /* xConnect - connect to an existing table */ rtreeBestIndex, /* xBestIndex - Determine search strategy */ @@ -124800,7 +127246,10 @@ static sqlite3_module rtreeModule = { 0, /* xCommit - commit transaction */ 0, /* xRollback - rollback transaction */ 0, /* xFindFunction - function overloading */ - rtreeRename /* xRename - rename the table */ + rtreeRename, /* xRename - rename the table */ + 0, /* xSavepoint */ + 0, /* xRelease */ + 0 /* xRollbackTo */ }; static int rtreeSqlInit( @@ -124920,7 +127369,7 @@ static int getNodeSize( int rc; char *zSql; if( isCreate ){ - int iPageSize; + int iPageSize = 0; zSql = sqlite3_mprintf("PRAGMA %Q.page_size", pRtree->zDb); rc = getIntFromStmt(db, zSql, &iPageSize); if( rc==SQLITE_OK ){ @@ -124977,6 +127426,8 @@ static int rtreeInit( return SQLITE_ERROR; } + sqlite3_vtab_config(db, SQLITE_VTAB_CONSTRAINT_SUPPORT, 1); + /* Allocate the sqlite3_vtab structure */ nDb = strlen(argv[1]); nName = strlen(argv[2]); @@ -125721,10 +128172,7 @@ SQLITE_API int sqlite3_extension_init( ** ************************************************************************* ** This file implements a tokenizer for fts3 based on the ICU library. -** -** $Id: fts3_icu.c,v 1.3 2008/09/01 18:34:20 danielk1977 Exp $ */ - #if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3) #ifdef SQLITE_ENABLE_ICU diff --git a/src/sqlite/sqlite3.h b/src/sqlite/sqlite3.h index 85e916c5e..ed9edbd20 100644 --- a/src/sqlite/sqlite3.h +++ b/src/sqlite/sqlite3.h @@ -107,9 +107,9 @@ extern "C" { ** [sqlite3_libversion_number()], [sqlite3_sourceid()], ** [sqlite_version()] and [sqlite_source_id()]. */ -#define SQLITE_VERSION "3.7.6.3" -#define SQLITE_VERSION_NUMBER 3007006 -#define SQLITE_SOURCE_ID "2011-05-19 13:26:54 ed1da510a239ea767a01dc332b667119fa3c908e" +#define SQLITE_VERSION "3.7.7.1" +#define SQLITE_VERSION_NUMBER 3007007 +#define SQLITE_SOURCE_ID "2011-06-28 17:39:05 af0d91adf497f5f36ec3813f04235a6e195a605f" /* ** CAPI3REF: Run-Time Library Version Numbers @@ -310,7 +310,7 @@ typedef int (*sqlite3_callback)(void*,int,char**, char**); ** argument. ^If the callback function of the 3rd argument to ** sqlite3_exec() is not NULL, then it is invoked for each result row ** coming out of the evaluated SQL statements. ^The 4th argument to -** to sqlite3_exec() is relayed through to the 1st argument of each +** sqlite3_exec() is relayed through to the 1st argument of each ** callback invocation. ^If the callback pointer to sqlite3_exec() ** is NULL, then no callback is ever invoked and result rows are ** ignored. @@ -375,7 +375,8 @@ SQLITE_API int sqlite3_exec( ** ** New error codes may be added in future versions of SQLite. ** -** See also: [SQLITE_IOERR_READ | extended result codes] +** See also: [SQLITE_IOERR_READ | extended result codes], +** [sqlite3_vtab_on_conflict()] [SQLITE_ROLLBACK | result codes]. */ #define SQLITE_OK 0 /* Successful result */ /* beginning-of-error-codes */ @@ -452,17 +453,21 @@ SQLITE_API int sqlite3_exec( #define SQLITE_IOERR_SHMOPEN (SQLITE_IOERR | (18<<8)) #define SQLITE_IOERR_SHMSIZE (SQLITE_IOERR | (19<<8)) #define SQLITE_IOERR_SHMLOCK (SQLITE_IOERR | (20<<8)) +#define SQLITE_IOERR_SHMMAP (SQLITE_IOERR | (21<<8)) +#define SQLITE_IOERR_SEEK (SQLITE_IOERR | (22<<8)) #define SQLITE_LOCKED_SHAREDCACHE (SQLITE_LOCKED | (1<<8)) #define SQLITE_BUSY_RECOVERY (SQLITE_BUSY | (1<<8)) #define SQLITE_CANTOPEN_NOTEMPDIR (SQLITE_CANTOPEN | (1<<8)) +#define SQLITE_CORRUPT_VTAB (SQLITE_CORRUPT | (1<<8)) +#define SQLITE_READONLY_RECOVERY (SQLITE_READONLY | (1<<8)) +#define SQLITE_READONLY_CANTLOCK (SQLITE_READONLY | (2<<8)) /* ** CAPI3REF: Flags For File Open Operations ** ** These bit values are intended for use in the ** 3rd parameter to the [sqlite3_open_v2()] interface and -** in the 4th parameter to the xOpen method of the -** [sqlite3_vfs] object. +** in the 4th parameter to the [sqlite3_vfs.xOpen] method. */ #define SQLITE_OPEN_READONLY 0x00000001 /* Ok for sqlite3_open_v2() */ #define SQLITE_OPEN_READWRITE 0x00000002 /* Ok for sqlite3_open_v2() */ @@ -470,6 +475,7 @@ SQLITE_API int sqlite3_exec( #define SQLITE_OPEN_DELETEONCLOSE 0x00000008 /* VFS only */ #define SQLITE_OPEN_EXCLUSIVE 0x00000010 /* VFS only */ #define SQLITE_OPEN_AUTOPROXY 0x00000020 /* VFS only */ +#define SQLITE_OPEN_URI 0x00000040 /* Ok for sqlite3_open_v2() */ #define SQLITE_OPEN_MAIN_DB 0x00000100 /* VFS only */ #define SQLITE_OPEN_TEMP_DB 0x00000200 /* VFS only */ #define SQLITE_OPEN_TRANSIENT_DB 0x00000400 /* VFS only */ @@ -580,17 +586,18 @@ struct sqlite3_file { /* ** CAPI3REF: OS Interface File Virtual Methods Object ** -** Every file opened by the [sqlite3_vfs] xOpen method populates an +** Every file opened by the [sqlite3_vfs.xOpen] method populates an ** [sqlite3_file] object (or, more commonly, a subclass of the ** [sqlite3_file] object) with a pointer to an instance of this object. ** This object defines the methods used to perform various operations ** against the open file represented by the [sqlite3_file] object. ** -** If the xOpen method sets the sqlite3_file.pMethods element +** If the [sqlite3_vfs.xOpen] method sets the sqlite3_file.pMethods element ** to a non-NULL pointer, then the sqlite3_io_methods.xClose method -** may be invoked even if the xOpen reported that it failed. The -** only way to prevent a call to xClose following a failed xOpen -** is for the xOpen to set the sqlite3_file.pMethods element to NULL. +** may be invoked even if the [sqlite3_vfs.xOpen] reported that it failed. The +** only way to prevent a call to xClose following a failed [sqlite3_vfs.xOpen] +** is for the [sqlite3_vfs.xOpen] to set the sqlite3_file.pMethods element +** to NULL. ** ** The flags argument to xSync may be one of [SQLITE_SYNC_NORMAL] or ** [SQLITE_SYNC_FULL]. The first choice is the normal fsync(). @@ -762,7 +769,8 @@ typedef struct sqlite3_mutex sqlite3_mutex; ** ** An instance of the sqlite3_vfs object defines the interface between ** the SQLite core and the underlying operating system. The "vfs" -** in the name of the object stands for "virtual file system". +** in the name of the object stands for "virtual file system". See +** the [VFS | VFS documentation] for further information. ** ** The value of the iVersion field is initially 1 but may be larger in ** future versions of SQLite. Additional fields may be appended to this @@ -791,6 +799,7 @@ typedef struct sqlite3_mutex sqlite3_mutex; ** The zName field holds the name of the VFS module. The name must ** be unique across all VFS modules. ** +** [[sqlite3_vfs.xOpen]] ** ^SQLite guarantees that the zFilename parameter to xOpen ** is either a NULL pointer or string obtained ** from xFullPathname() with an optional suffix added. @@ -868,6 +877,7 @@ typedef struct sqlite3_mutex sqlite3_mutex; ** element will be valid after xOpen returns regardless of the success ** or failure of the xOpen call. ** +** [[sqlite3_vfs.xAccess]] ** ^The flags argument to xAccess() may be [SQLITE_ACCESS_EXISTS] ** to test for the existence of a file, or [SQLITE_ACCESS_READWRITE] to ** test whether a file is readable and writable, or [SQLITE_ACCESS_READ] @@ -892,7 +902,7 @@ typedef struct sqlite3_mutex sqlite3_mutex; ** method returns a Julian Day Number for the current date and time as ** a floating point value. ** ^The xCurrentTimeInt64() method returns, as an integer, the Julian -** Day Number multipled by 86400000 (the number of milliseconds in +** Day Number multiplied by 86400000 (the number of milliseconds in ** a 24-hour day). ** ^SQLite will use the xCurrentTimeInt64() method to get the current ** date and time if that method is available (if iVersion is 2 or @@ -1114,9 +1124,9 @@ SQLITE_API int sqlite3_os_end(void); ** implementation of an application-defined [sqlite3_os_init()]. ** ** The first argument to sqlite3_config() is an integer -** [SQLITE_CONFIG_SINGLETHREAD | configuration option] that determines +** [configuration option] that determines ** what property of SQLite is to be configured. Subsequent arguments -** vary depending on the [SQLITE_CONFIG_SINGLETHREAD | configuration option] +** vary depending on the [configuration option] ** in the first argument. ** ** ^When a configuration option is set, sqlite3_config() returns [SQLITE_OK]. @@ -1226,6 +1236,7 @@ struct sqlite3_mem_methods { /* ** CAPI3REF: Configuration Options +** KEYWORDS: {configuration option} ** ** These constants are the available integer configuration options that ** can be passed as the first argument to the [sqlite3_config()] interface. @@ -1238,7 +1249,7 @@ struct sqlite3_mem_methods { ** is invoked. ** ** <dl> -** <dt>SQLITE_CONFIG_SINGLETHREAD</dt> +** [[SQLITE_CONFIG_SINGLETHREAD]] <dt>SQLITE_CONFIG_SINGLETHREAD</dt> ** <dd>There are no arguments to this option. ^This option sets the ** [threading mode] to Single-thread. In other words, it disables ** all mutexing and puts SQLite into a mode where it can only be used @@ -1249,7 +1260,7 @@ struct sqlite3_mem_methods { ** [SQLITE_ERROR] if called with the SQLITE_CONFIG_SINGLETHREAD ** configuration option.</dd> ** -** <dt>SQLITE_CONFIG_MULTITHREAD</dt> +** [[SQLITE_CONFIG_MULTITHREAD]] <dt>SQLITE_CONFIG_MULTITHREAD</dt> ** <dd>There are no arguments to this option. ^This option sets the ** [threading mode] to Multi-thread. In other words, it disables ** mutexing on [database connection] and [prepared statement] objects. @@ -1263,7 +1274,7 @@ struct sqlite3_mem_methods { ** [sqlite3_config()] will return [SQLITE_ERROR] if called with the ** SQLITE_CONFIG_MULTITHREAD configuration option.</dd> ** -** <dt>SQLITE_CONFIG_SERIALIZED</dt> +** [[SQLITE_CONFIG_SERIALIZED]] <dt>SQLITE_CONFIG_SERIALIZED</dt> ** <dd>There are no arguments to this option. ^This option sets the ** [threading mode] to Serialized. In other words, this option enables ** all mutexes including the recursive @@ -1279,7 +1290,7 @@ struct sqlite3_mem_methods { ** [sqlite3_config()] will return [SQLITE_ERROR] if called with the ** SQLITE_CONFIG_SERIALIZED configuration option.</dd> ** -** <dt>SQLITE_CONFIG_MALLOC</dt> +** [[SQLITE_CONFIG_MALLOC]] <dt>SQLITE_CONFIG_MALLOC</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** instance of the [sqlite3_mem_methods] structure. The argument specifies ** alternative low-level memory allocation routines to be used in place of @@ -1287,7 +1298,7 @@ struct sqlite3_mem_methods { ** its own private copy of the content of the [sqlite3_mem_methods] structure ** before the [sqlite3_config()] call returns.</dd> ** -** <dt>SQLITE_CONFIG_GETMALLOC</dt> +** [[SQLITE_CONFIG_GETMALLOC]] <dt>SQLITE_CONFIG_GETMALLOC</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** instance of the [sqlite3_mem_methods] structure. The [sqlite3_mem_methods] ** structure is filled with the currently defined memory allocation routines.)^ @@ -1295,7 +1306,7 @@ struct sqlite3_mem_methods { ** routines with a wrapper that simulations memory allocation failure or ** tracks memory usage, for example. </dd> ** -** <dt>SQLITE_CONFIG_MEMSTATUS</dt> +** [[SQLITE_CONFIG_MEMSTATUS]] <dt>SQLITE_CONFIG_MEMSTATUS</dt> ** <dd> ^This option takes single argument of type int, interpreted as a ** boolean, which enables or disables the collection of memory allocation ** statistics. ^(When memory allocation statistics are disabled, the @@ -1311,7 +1322,7 @@ struct sqlite3_mem_methods { ** allocation statistics are disabled by default. ** </dd> ** -** <dt>SQLITE_CONFIG_SCRATCH</dt> +** [[SQLITE_CONFIG_SCRATCH]] <dt>SQLITE_CONFIG_SCRATCH</dt> ** <dd> ^This option specifies a static memory buffer that SQLite can use for ** scratch memory. There are three arguments: A pointer an 8-byte ** aligned memory buffer from which the scratch allocations will be @@ -1327,9 +1338,9 @@ struct sqlite3_mem_methods { ** scratch memory beyond what is provided by this configuration option, then ** [sqlite3_malloc()] will be used to obtain the memory needed.</dd> ** -** <dt>SQLITE_CONFIG_PAGECACHE</dt> +** [[SQLITE_CONFIG_PAGECACHE]] <dt>SQLITE_CONFIG_PAGECACHE</dt> ** <dd> ^This option specifies a static memory buffer that SQLite can use for -** the database page cache with the default page cache implemenation. +** the database page cache with the default page cache implementation. ** This configuration should not be used if an application-define page ** cache implementation is loaded using the SQLITE_CONFIG_PCACHE option. ** There are three arguments to this option: A pointer to 8-byte aligned @@ -1348,7 +1359,7 @@ struct sqlite3_mem_methods { ** be aligned to an 8-byte boundary or subsequent behavior of SQLite ** will be undefined.</dd> ** -** <dt>SQLITE_CONFIG_HEAP</dt> +** [[SQLITE_CONFIG_HEAP]] <dt>SQLITE_CONFIG_HEAP</dt> ** <dd> ^This option specifies a static memory buffer that SQLite will use ** for all of its dynamic memory allocation needs beyond those provided ** for by [SQLITE_CONFIG_SCRATCH] and [SQLITE_CONFIG_PAGECACHE]. @@ -1365,7 +1376,7 @@ struct sqlite3_mem_methods { ** The minimum allocation size is capped at 2^12. Reasonable values ** for the minimum allocation size are 2^5 through 2^8.</dd> ** -** <dt>SQLITE_CONFIG_MUTEX</dt> +** [[SQLITE_CONFIG_MUTEX]] <dt>SQLITE_CONFIG_MUTEX</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** instance of the [sqlite3_mutex_methods] structure. The argument specifies ** alternative low-level mutex routines to be used in place @@ -1377,7 +1388,7 @@ struct sqlite3_mem_methods { ** [sqlite3_config()] with the SQLITE_CONFIG_MUTEX configuration option will ** return [SQLITE_ERROR].</dd> ** -** <dt>SQLITE_CONFIG_GETMUTEX</dt> +** [[SQLITE_CONFIG_GETMUTEX]] <dt>SQLITE_CONFIG_GETMUTEX</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** instance of the [sqlite3_mutex_methods] structure. The ** [sqlite3_mutex_methods] @@ -1390,7 +1401,7 @@ struct sqlite3_mem_methods { ** [sqlite3_config()] with the SQLITE_CONFIG_GETMUTEX configuration option will ** return [SQLITE_ERROR].</dd> ** -** <dt>SQLITE_CONFIG_LOOKASIDE</dt> +** [[SQLITE_CONFIG_LOOKASIDE]] <dt>SQLITE_CONFIG_LOOKASIDE</dt> ** <dd> ^(This option takes two arguments that determine the default ** memory allocation for the lookaside memory allocator on each ** [database connection]. The first argument is the @@ -1400,18 +1411,18 @@ struct sqlite3_mem_methods { ** verb to [sqlite3_db_config()] can be used to change the lookaside ** configuration on individual connections.)^ </dd> ** -** <dt>SQLITE_CONFIG_PCACHE</dt> +** [[SQLITE_CONFIG_PCACHE]] <dt>SQLITE_CONFIG_PCACHE</dt> ** <dd> ^(This option takes a single argument which is a pointer to ** an [sqlite3_pcache_methods] object. This object specifies the interface ** to a custom page cache implementation.)^ ^SQLite makes a copy of the ** object and uses it for page cache memory allocations.</dd> ** -** <dt>SQLITE_CONFIG_GETPCACHE</dt> +** [[SQLITE_CONFIG_GETPCACHE]] <dt>SQLITE_CONFIG_GETPCACHE</dt> ** <dd> ^(This option takes a single argument which is a pointer to an ** [sqlite3_pcache_methods] object. SQLite copies of the current ** page cache implementation into that object.)^ </dd> ** -** <dt>SQLITE_CONFIG_LOG</dt> +** [[SQLITE_CONFIG_LOG]] <dt>SQLITE_CONFIG_LOG</dt> ** <dd> ^The SQLITE_CONFIG_LOG option takes two arguments: a pointer to a ** function with a call signature of void(*)(void*,int,const char*), ** and a pointer to void. ^If the function pointer is not NULL, it is @@ -1429,6 +1440,18 @@ struct sqlite3_mem_methods { ** In a multi-threaded application, the application-defined logger ** function must be threadsafe. </dd> ** +** [[SQLITE_CONFIG_URI]] <dt>SQLITE_CONFIG_URI +** <dd> This option takes a single argument of type int. If non-zero, then +** URI handling is globally enabled. If the parameter is zero, then URI handling +** is globally disabled. If URI handling is globally enabled, all filenames +** passed to [sqlite3_open()], [sqlite3_open_v2()], [sqlite3_open16()] or +** specified as part of [ATTACH] commands are interpreted as URIs, regardless +** of whether or not the [SQLITE_OPEN_URI] flag is set when the database +** connection is opened. If it is globally disabled, filenames are +** only interpreted as URIs if the SQLITE_OPEN_URI flag is set when the +** database connection is opened. By default, URI handling is globally +** disabled. The default value may be changed by compiling with the +** [SQLITE_USE_URI] symbol defined. ** </dl> */ #define SQLITE_CONFIG_SINGLETHREAD 1 /* nil */ @@ -1447,6 +1470,7 @@ struct sqlite3_mem_methods { #define SQLITE_CONFIG_PCACHE 14 /* sqlite3_pcache_methods* */ #define SQLITE_CONFIG_GETPCACHE 15 /* sqlite3_pcache_methods* */ #define SQLITE_CONFIG_LOG 16 /* xFunc, void* */ +#define SQLITE_CONFIG_URI 17 /* int */ /* ** CAPI3REF: Database Connection Configuration Options @@ -1532,13 +1556,17 @@ SQLITE_API int sqlite3_extended_result_codes(sqlite3*, int onoff); ** ** ^This routine returns the [rowid] of the most recent ** successful [INSERT] into the database from the [database connection] -** in the first argument. ^If no successful [INSERT]s +** in the first argument. ^As of SQLite version 3.7.7, this routines +** records the last insert rowid of both ordinary tables and [virtual tables]. +** ^If no successful [INSERT]s ** have ever occurred on that database connection, zero is returned. ** -** ^(If an [INSERT] occurs within a trigger, then the [rowid] of the inserted -** row is returned by this routine as long as the trigger is running. -** But once the trigger terminates, the value returned by this routine -** reverts to the last value inserted before the trigger fired.)^ +** ^(If an [INSERT] occurs within a trigger or within a [virtual table] +** method, then this routine will return the [rowid] of the inserted +** row as long as the trigger or virtual table method is running. +** But once the trigger or virtual table method ends, the value returned +** by this routine reverts to what it was before the trigger or virtual +** table method began.)^ ** ** ^An [INSERT] that fails due to a constraint violation is not a ** successful [INSERT] and does not change the value returned by this @@ -2201,6 +2229,9 @@ SQLITE_API int sqlite3_set_authorizer( ** to signal SQLite whether or not the action is permitted. See the ** [sqlite3_set_authorizer | authorizer documentation] for additional ** information. +** +** Note that SQLITE_IGNORE is also used as a [SQLITE_ROLLBACK | return code] +** from the [sqlite3_vtab_on_conflict()] interface. */ #define SQLITE_DENY 1 /* Abort the SQL statement with an error */ #define SQLITE_IGNORE 2 /* Don't allow access, but don't generate an error */ @@ -2323,7 +2354,7 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); /* ** CAPI3REF: Opening A New Database Connection ** -** ^These routines open an SQLite database file whose name is given by the +** ^These routines open an SQLite database file as specified by the ** filename argument. ^The filename argument is interpreted as UTF-8 for ** sqlite3_open() and sqlite3_open_v2() and as UTF-16 in the native byte ** order for sqlite3_open16(). ^(A [database connection] handle is usually @@ -2350,7 +2381,7 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); ** sqlite3_open_v2() can take one of ** the following three values, optionally combined with the ** [SQLITE_OPEN_NOMUTEX], [SQLITE_OPEN_FULLMUTEX], [SQLITE_OPEN_SHAREDCACHE], -** and/or [SQLITE_OPEN_PRIVATECACHE] flags:)^ +** [SQLITE_OPEN_PRIVATECACHE], and/or [SQLITE_OPEN_URI] flags:)^ ** ** <dl> ** ^(<dt>[SQLITE_OPEN_READONLY]</dt> @@ -2369,9 +2400,8 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); ** </dl> ** ** If the 3rd parameter to sqlite3_open_v2() is not one of the -** combinations shown above or one of the combinations shown above combined -** with the [SQLITE_OPEN_NOMUTEX], [SQLITE_OPEN_FULLMUTEX], -** [SQLITE_OPEN_SHAREDCACHE] and/or [SQLITE_OPEN_PRIVATECACHE] flags, +** combinations shown above optionally combined with other +** [SQLITE_OPEN_READONLY | SQLITE_OPEN_* bits] ** then the behavior is undefined. ** ** ^If the [SQLITE_OPEN_NOMUTEX] flag is set, then the database connection @@ -2386,6 +2416,11 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); ** [SQLITE_OPEN_PRIVATECACHE] flag causes the database connection to not ** participate in [shared cache mode] even if it is enabled. ** +** ^The fourth parameter to sqlite3_open_v2() is the name of the +** [sqlite3_vfs] object that defines the operating system interface that +** the new database connection should use. ^If the fourth parameter is +** a NULL pointer then the default [sqlite3_vfs] object is used. +** ** ^If the filename is ":memory:", then a private, temporary in-memory database ** is created for the connection. ^This in-memory database will vanish when ** the database connection is closed. Future versions of SQLite might @@ -2398,10 +2433,111 @@ SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*); ** on-disk database will be created. ^This private database will be ** automatically deleted as soon as the database connection is closed. ** -** ^The fourth parameter to sqlite3_open_v2() is the name of the -** [sqlite3_vfs] object that defines the operating system interface that -** the new database connection should use. ^If the fourth parameter is -** a NULL pointer then the default [sqlite3_vfs] object is used. +** [[URI filenames in sqlite3_open()]] <h3>URI Filenames</h3> +** +** ^If [URI filename] interpretation is enabled, and the filename argument +** begins with "file:", then the filename is interpreted as a URI. ^URI +** filename interpretation is enabled if the [SQLITE_OPEN_URI] flag is +** set in the fourth argument to sqlite3_open_v2(), or if it has +** been enabled globally using the [SQLITE_CONFIG_URI] option with the +** [sqlite3_config()] method or by the [SQLITE_USE_URI] compile-time option. +** As of SQLite version 3.7.7, URI filename interpretation is turned off +** by default, but future releases of SQLite might enable URI filename +** interpretation by default. See "[URI filenames]" for additional +** information. +** +** URI filenames are parsed according to RFC 3986. ^If the URI contains an +** authority, then it must be either an empty string or the string +** "localhost". ^If the authority is not an empty string or "localhost", an +** error is returned to the caller. ^The fragment component of a URI, if +** present, is ignored. +** +** ^SQLite uses the path component of the URI as the name of the disk file +** which contains the database. ^If the path begins with a '/' character, +** then it is interpreted as an absolute path. ^If the path does not begin +** with a '/' (meaning that the authority section is omitted from the URI) +** then the path is interpreted as a relative path. +** ^On windows, the first component of an absolute path +** is a drive specification (e.g. "C:"). +** +** [[core URI query parameters]] +** The query component of a URI may contain parameters that are interpreted +** either by SQLite itself, or by a [VFS | custom VFS implementation]. +** SQLite interprets the following three query parameters: +** +** <ul> +** <li> <b>vfs</b>: ^The "vfs" parameter may be used to specify the name of +** a VFS object that provides the operating system interface that should +** be used to access the database file on disk. ^If this option is set to +** an empty string the default VFS object is used. ^Specifying an unknown +** VFS is an error. ^If sqlite3_open_v2() is used and the vfs option is +** present, then the VFS specified by the option takes precedence over +** the value passed as the fourth parameter to sqlite3_open_v2(). +** +** <li> <b>mode</b>: ^(The mode parameter may be set to either "ro", "rw" or +** "rwc". Attempting to set it to any other value is an error)^. +** ^If "ro" is specified, then the database is opened for read-only +** access, just as if the [SQLITE_OPEN_READONLY] flag had been set in the +** third argument to sqlite3_prepare_v2(). ^If the mode option is set to +** "rw", then the database is opened for read-write (but not create) +** access, as if SQLITE_OPEN_READWRITE (but not SQLITE_OPEN_CREATE) had +** been set. ^Value "rwc" is equivalent to setting both +** SQLITE_OPEN_READWRITE and SQLITE_OPEN_CREATE. ^If sqlite3_open_v2() is +** used, it is an error to specify a value for the mode parameter that is +** less restrictive than that specified by the flags passed as the third +** parameter. +** +** <li> <b>cache</b>: ^The cache parameter may be set to either "shared" or +** "private". ^Setting it to "shared" is equivalent to setting the +** SQLITE_OPEN_SHAREDCACHE bit in the flags argument passed to +** sqlite3_open_v2(). ^Setting the cache parameter to "private" is +** equivalent to setting the SQLITE_OPEN_PRIVATECACHE bit. +** ^If sqlite3_open_v2() is used and the "cache" parameter is present in +** a URI filename, its value overrides any behaviour requested by setting +** SQLITE_OPEN_PRIVATECACHE or SQLITE_OPEN_SHAREDCACHE flag. +** </ul> +** +** ^Specifying an unknown parameter in the query component of a URI is not an +** error. Future versions of SQLite might understand additional query +** parameters. See "[query parameters with special meaning to SQLite]" for +** additional information. +** +** [[URI filename examples]] <h3>URI filename examples</h3> +** +** <table border="1" align=center cellpadding=5> +** <tr><th> URI filenames <th> Results +** <tr><td> file:data.db <td> +** Open the file "data.db" in the current directory. +** <tr><td> file:/home/fred/data.db<br> +** file:///home/fred/data.db <br> +** file://localhost/home/fred/data.db <br> <td> +** Open the database file "/home/fred/data.db". +** <tr><td> file://darkstar/home/fred/data.db <td> +** An error. "darkstar" is not a recognized authority. +** <tr><td style="white-space:nowrap"> +** file:///C:/Documents%20and%20Settings/fred/Desktop/data.db +** <td> Windows only: Open the file "data.db" on fred's desktop on drive +** C:. Note that the %20 escaping in this example is not strictly +** necessary - space characters can be used literally +** in URI filenames. +** <tr><td> file:data.db?mode=ro&cache=private <td> +** Open file "data.db" in the current directory for read-only access. +** Regardless of whether or not shared-cache mode is enabled by +** default, use a private cache. +** <tr><td> file:/home/fred/data.db?vfs=unix-nolock <td> +** Open file "/home/fred/data.db". Use the special VFS "unix-nolock". +** <tr><td> file:data.db?mode=readonly <td> +** An error. "readonly" is not a valid option for the "mode" parameter. +** </table> +** +** ^URI hexadecimal escape sequences (%HH) are supported within the path and +** query components of a URI. A hexadecimal escape sequence consists of a +** percent sign - "%" - followed by exactly two hexadecimal digits +** specifying an octet value. ^Before the path or query components of a +** URI filename are interpreted, they are encoded using UTF-8 and all +** hexadecimal escape sequences replaced by a single byte containing the +** corresponding octet. If this process generates an invalid UTF-8 encoding, +** the results are undefined. ** ** <b>Note to Windows users:</b> The encoding used for the filename argument ** of sqlite3_open() and sqlite3_open_v2() must be UTF-8, not whatever @@ -2425,6 +2561,26 @@ SQLITE_API int sqlite3_open_v2( ); /* +** CAPI3REF: Obtain Values For URI Parameters +** +** This is a utility routine, useful to VFS implementations, that checks +** to see if a database file was a URI that contained a specific query +** parameter, and if so obtains the value of the query parameter. +** +** The zFilename argument is the filename pointer passed into the xOpen() +** method of a VFS implementation. The zParam argument is the name of the +** query parameter we seek. This routine returns the value of the zParam +** parameter if it exists. If the parameter does not exist, this routine +** returns a NULL pointer. +** +** If the zFilename argument to this function is not a pointer that SQLite +** passed into the xOpen VFS method, then the behavior of this routine +** is undefined and probably undesirable. +*/ +SQLITE_API const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam); + + +/* ** CAPI3REF: Error Codes And Messages ** ** ^The sqlite3_errcode() interface returns the numeric [result code] or @@ -2539,43 +2695,45 @@ SQLITE_API int sqlite3_limit(sqlite3*, int id, int newVal); ** Additional information is available at [limits | Limits in SQLite]. ** ** <dl> -** ^(<dt>SQLITE_LIMIT_LENGTH</dt> +** [[SQLITE_LIMIT_LENGTH]] ^(<dt>SQLITE_LIMIT_LENGTH</dt> ** <dd>The maximum size of any string or BLOB or table row, in bytes.<dd>)^ ** -** ^(<dt>SQLITE_LIMIT_SQL_LENGTH</dt> +** [[SQLITE_LIMIT_SQL_LENGTH]] ^(<dt>SQLITE_LIMIT_SQL_LENGTH</dt> ** <dd>The maximum length of an SQL statement, in bytes.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_COLUMN</dt> +** [[SQLITE_LIMIT_COLUMN]] ^(<dt>SQLITE_LIMIT_COLUMN</dt> ** <dd>The maximum number of columns in a table definition or in the ** result set of a [SELECT] or the maximum number of columns in an index ** or in an ORDER BY or GROUP BY clause.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_EXPR_DEPTH</dt> +** [[SQLITE_LIMIT_EXPR_DEPTH]] ^(<dt>SQLITE_LIMIT_EXPR_DEPTH</dt> ** <dd>The maximum depth of the parse tree on any expression.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt> +** [[SQLITE_LIMIT_COMPOUND_SELECT]] ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt> ** <dd>The maximum number of terms in a compound SELECT statement.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_VDBE_OP</dt> +** [[SQLITE_LIMIT_VDBE_OP]] ^(<dt>SQLITE_LIMIT_VDBE_OP</dt> ** <dd>The maximum number of instructions in a virtual machine program ** used to implement an SQL statement. This limit is not currently ** enforced, though that might be added in some future release of ** SQLite.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt> +** [[SQLITE_LIMIT_FUNCTION_ARG]] ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt> ** <dd>The maximum number of arguments on a function.</dd>)^ ** -** ^(<dt>SQLITE_LIMIT_ATTACHED</dt> +** [[SQLITE_LIMIT_ATTACHED]] ^(<dt>SQLITE_LIMIT_ATTACHED</dt> ** <dd>The maximum number of [ATTACH | attached databases].)^</dd> ** +** [[SQLITE_LIMIT_LIKE_PATTERN_LENGTH]] ** ^(<dt>SQLITE_LIMIT_LIKE_PATTERN_LENGTH</dt> ** <dd>The maximum length of the pattern argument to the [LIKE] or ** [GLOB] operators.</dd>)^ ** +** [[SQLITE_LIMIT_VARIABLE_NUMBER]] ** ^(<dt>SQLITE_LIMIT_VARIABLE_NUMBER</dt> ** <dd>The maximum index number of any [parameter] in an SQL statement.)^ ** -** ^(<dt>SQLITE_LIMIT_TRIGGER_DEPTH</dt> +** [[SQLITE_LIMIT_TRIGGER_DEPTH]] ^(<dt>SQLITE_LIMIT_TRIGGER_DEPTH</dt> ** <dd>The maximum depth of recursion for triggers.</dd>)^ ** </dl> */ @@ -3104,7 +3262,7 @@ SQLITE_API const void *sqlite3_column_decltype16(sqlite3_stmt*,int); ** ^[SQLITE_BUSY] means that the database engine was unable to acquire the ** database locks it needs to do its job. ^If the statement is a [COMMIT] ** or occurs outside of an explicit transaction, then you can retry the -** statement. If the statement is not a [COMMIT] and occurs within a +** statement. If the statement is not a [COMMIT] and occurs within an ** explicit transaction then you should rollback the transaction before ** continuing. ** @@ -3383,7 +3541,7 @@ SQLITE_API sqlite3_value *sqlite3_column_value(sqlite3_stmt*, int iCol); ** CAPI3REF: Destroy A Prepared Statement Object ** ** ^The sqlite3_finalize() function is called to delete a [prepared statement]. -** ^If the most recent evaluation of the statement encountered no errors or +** ^If the most recent evaluation of the statement encountered no errors ** or if the statement is never been evaluated, then sqlite3_finalize() returns ** SQLITE_OK. ^If the most recent evaluation of statement S failed, then ** sqlite3_finalize(S) returns the appropriate [error code] or @@ -4610,6 +4768,11 @@ struct sqlite3_module { void (**pxFunc)(sqlite3_context*,int,sqlite3_value**), void **ppArg); int (*xRename)(sqlite3_vtab *pVtab, const char *zNew); + /* The methods above are in version 1 of the sqlite_module object. Those + ** below are for version 2 and greater. */ + int (*xSavepoint)(sqlite3_vtab *pVTab, int); + int (*xRelease)(sqlite3_vtab *pVTab, int); + int (*xRollbackTo)(sqlite3_vtab *pVTab, int); }; /* @@ -5292,7 +5455,7 @@ struct sqlite3_mutex_methods { ** ** ^If the argument to sqlite3_mutex_held() is a NULL pointer then ** the routine should return 1. This seems counter-intuitive since -** clearly the mutex cannot be held if it does not exist. But the +** clearly the mutex cannot be held if it does not exist. But ** the reason the mutex does not exist is because the build is not ** using mutexes. And we do not want the assert() containing the ** call to sqlite3_mutex_held() to fail, so a non-zero return is @@ -5415,7 +5578,8 @@ SQLITE_API int sqlite3_test_control(int op, ...); #define SQLITE_TESTCTRL_ISKEYWORD 16 #define SQLITE_TESTCTRL_PGHDRSZ 17 #define SQLITE_TESTCTRL_SCRATCHMALLOC 18 -#define SQLITE_TESTCTRL_LAST 18 +#define SQLITE_TESTCTRL_LOCALTIME_FAULT 19 +#define SQLITE_TESTCTRL_LAST 19 /* ** CAPI3REF: SQLite Runtime Status @@ -5424,7 +5588,7 @@ SQLITE_API int sqlite3_test_control(int op, ...); ** about the performance of SQLite, and optionally to reset various ** highwater marks. ^The first argument is an integer code for ** the specific parameter to measure. ^(Recognized integer codes -** are of the form [SQLITE_STATUS_MEMORY_USED | SQLITE_STATUS_...].)^ +** are of the form [status parameters | SQLITE_STATUS_...].)^ ** ^The current value of the parameter is returned into *pCurrent. ** ^The highest recorded value is returned in *pHighwater. ^If the ** resetFlag is true, then the highest record value is reset after @@ -5451,12 +5615,13 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF /* ** CAPI3REF: Status Parameters +** KEYWORDS: {status parameters} ** ** These integer constants designate various run-time status parameters ** that can be returned by [sqlite3_status()]. ** ** <dl> -** ^(<dt>SQLITE_STATUS_MEMORY_USED</dt> +** [[SQLITE_STATUS_MEMORY_USED]] ^(<dt>SQLITE_STATUS_MEMORY_USED</dt> ** <dd>This parameter is the current amount of memory checked out ** using [sqlite3_malloc()], either directly or indirectly. The ** figure includes calls made to [sqlite3_malloc()] by the application @@ -5466,23 +5631,24 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** this parameter. The amount returned is the sum of the allocation ** sizes as reported by the xSize method in [sqlite3_mem_methods].</dd>)^ ** -** ^(<dt>SQLITE_STATUS_MALLOC_SIZE</dt> +** [[SQLITE_STATUS_MALLOC_SIZE]] ^(<dt>SQLITE_STATUS_MALLOC_SIZE</dt> ** <dd>This parameter records the largest memory allocation request ** handed to [sqlite3_malloc()] or [sqlite3_realloc()] (or their ** internal equivalents). Only the value returned in the ** *pHighwater parameter to [sqlite3_status()] is of interest. ** The value written into the *pCurrent parameter is undefined.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_MALLOC_COUNT</dt> +** [[SQLITE_STATUS_MALLOC_COUNT]] ^(<dt>SQLITE_STATUS_MALLOC_COUNT</dt> ** <dd>This parameter records the number of separate memory allocations ** currently checked out.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_PAGECACHE_USED</dt> +** [[SQLITE_STATUS_PAGECACHE_USED]] ^(<dt>SQLITE_STATUS_PAGECACHE_USED</dt> ** <dd>This parameter returns the number of pages used out of the ** [pagecache memory allocator] that was configured using ** [SQLITE_CONFIG_PAGECACHE]. The ** value returned is in pages, not in bytes.</dd>)^ ** +** [[SQLITE_STATUS_PAGECACHE_OVERFLOW]] ** ^(<dt>SQLITE_STATUS_PAGECACHE_OVERFLOW</dt> ** <dd>This parameter returns the number of bytes of page cache ** allocation which could not be satisfied by the [SQLITE_CONFIG_PAGECACHE] @@ -5492,13 +5658,13 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** [SQLITE_CONFIG_PAGECACHE]) and allocations that overflowed because ** no space was left in the page cache.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_PAGECACHE_SIZE</dt> +** [[SQLITE_STATUS_PAGECACHE_SIZE]] ^(<dt>SQLITE_STATUS_PAGECACHE_SIZE</dt> ** <dd>This parameter records the largest memory allocation request ** handed to [pagecache memory allocator]. Only the value returned in the ** *pHighwater parameter to [sqlite3_status()] is of interest. ** The value written into the *pCurrent parameter is undefined.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_SCRATCH_USED</dt> +** [[SQLITE_STATUS_SCRATCH_USED]] ^(<dt>SQLITE_STATUS_SCRATCH_USED</dt> ** <dd>This parameter returns the number of allocations used out of the ** [scratch memory allocator] configured using ** [SQLITE_CONFIG_SCRATCH]. The value returned is in allocations, not @@ -5506,7 +5672,7 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** outstanding at time, this parameter also reports the number of threads ** using scratch memory at the same time.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_SCRATCH_OVERFLOW</dt> +** [[SQLITE_STATUS_SCRATCH_OVERFLOW]] ^(<dt>SQLITE_STATUS_SCRATCH_OVERFLOW</dt> ** <dd>This parameter returns the number of bytes of scratch memory ** allocation which could not be satisfied by the [SQLITE_CONFIG_SCRATCH] ** buffer and where forced to overflow to [sqlite3_malloc()]. The values @@ -5516,13 +5682,13 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** slots were available. ** </dd>)^ ** -** ^(<dt>SQLITE_STATUS_SCRATCH_SIZE</dt> +** [[SQLITE_STATUS_SCRATCH_SIZE]] ^(<dt>SQLITE_STATUS_SCRATCH_SIZE</dt> ** <dd>This parameter records the largest memory allocation request ** handed to [scratch memory allocator]. Only the value returned in the ** *pHighwater parameter to [sqlite3_status()] is of interest. ** The value written into the *pCurrent parameter is undefined.</dd>)^ ** -** ^(<dt>SQLITE_STATUS_PARSER_STACK</dt> +** [[SQLITE_STATUS_PARSER_STACK]] ^(<dt>SQLITE_STATUS_PARSER_STACK</dt> ** <dd>This parameter records the deepest parser stack. It is only ** meaningful if SQLite is compiled with [YYTRACKMAXSTACKDEPTH].</dd>)^ ** </dl> @@ -5547,9 +5713,9 @@ SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetF ** about a single [database connection]. ^The first argument is the ** database connection object to be interrogated. ^The second argument ** is an integer constant, taken from the set of -** [SQLITE_DBSTATUS_LOOKASIDE_USED | SQLITE_DBSTATUS_*] macros, that +** [SQLITE_DBSTATUS options], that ** determines the parameter to interrogate. The set of -** [SQLITE_DBSTATUS_LOOKASIDE_USED | SQLITE_DBSTATUS_*] macros is likely +** [SQLITE_DBSTATUS options] is likely ** to grow in future releases of SQLite. ** ** ^The current value of the requested parameter is written into *pCur @@ -5566,6 +5732,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r /* ** CAPI3REF: Status Parameters for database connections +** KEYWORDS: {SQLITE_DBSTATUS options} ** ** These constants are the available integer "verbs" that can be passed as ** the second argument to the [sqlite3_db_status()] interface. @@ -5577,15 +5744,16 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** if a discontinued or unsupported verb is invoked. ** ** <dl> -** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_USED</dt> +** [[SQLITE_DBSTATUS_LOOKASIDE_USED]] ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_USED</dt> ** <dd>This parameter returns the number of lookaside memory slots currently ** checked out.</dd>)^ ** -** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_HIT</dt> +** [[SQLITE_DBSTATUS_LOOKASIDE_HIT]] ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_HIT</dt> ** <dd>This parameter returns the number malloc attempts that were ** satisfied using lookaside memory. Only the high-water value is meaningful; ** the current value is always zero.)^ ** +** [[SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE]] ** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE</dt> ** <dd>This parameter returns the number malloc attempts that might have ** been satisfied using lookaside memory but failed due to the amount of @@ -5593,6 +5761,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** Only the high-water value is meaningful; ** the current value is always zero.)^ ** +** [[SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL]] ** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL</dt> ** <dd>This parameter returns the number malloc attempts that might have ** been satisfied using lookaside memory but failed due to all lookaside @@ -5600,12 +5769,12 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** Only the high-water value is meaningful; ** the current value is always zero.)^ ** -** ^(<dt>SQLITE_DBSTATUS_CACHE_USED</dt> +** [[SQLITE_DBSTATUS_CACHE_USED]] ^(<dt>SQLITE_DBSTATUS_CACHE_USED</dt> ** <dd>This parameter returns the approximate number of of bytes of heap ** memory used by all pager caches associated with the database connection.)^ ** ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_USED is always 0. ** -** ^(<dt>SQLITE_DBSTATUS_SCHEMA_USED</dt> +** [[SQLITE_DBSTATUS_SCHEMA_USED]] ^(<dt>SQLITE_DBSTATUS_SCHEMA_USED</dt> ** <dd>This parameter returns the approximate number of of bytes of heap ** memory used to store the schema for all databases associated ** with the connection - main, temp, and any [ATTACH]-ed databases.)^ @@ -5614,7 +5783,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** [shared cache mode] being enabled. ** ^The highwater mark associated with SQLITE_DBSTATUS_SCHEMA_USED is always 0. ** -** ^(<dt>SQLITE_DBSTATUS_STMT_USED</dt> +** [[SQLITE_DBSTATUS_STMT_USED]] ^(<dt>SQLITE_DBSTATUS_STMT_USED</dt> ** <dd>This parameter returns the approximate number of of bytes of heap ** and lookaside memory used by all prepared statements associated with ** the database connection.)^ @@ -5636,7 +5805,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** CAPI3REF: Prepared Statement Status ** ** ^(Each prepared statement maintains various -** [SQLITE_STMTSTATUS_SORT | counters] that measure the number +** [SQLITE_STMTSTATUS counters] that measure the number ** of times it has performed specific operations.)^ These counters can ** be used to monitor the performance characteristics of the prepared ** statements. For example, if the number of table steps greatly exceeds @@ -5647,7 +5816,7 @@ SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int r ** ^(This interface is used to retrieve and reset counter values from ** a [prepared statement]. The first argument is the prepared statement ** object to be interrogated. The second argument -** is an integer code for a specific [SQLITE_STMTSTATUS_SORT | counter] +** is an integer code for a specific [SQLITE_STMTSTATUS counter] ** to be interrogated.)^ ** ^The current value of the requested counter is returned. ** ^If the resetFlg is true, then the counter is reset to zero after this @@ -5659,24 +5828,25 @@ SQLITE_API int sqlite3_stmt_status(sqlite3_stmt*, int op,int resetFlg); /* ** CAPI3REF: Status Parameters for prepared statements +** KEYWORDS: {SQLITE_STMTSTATUS counter} {SQLITE_STMTSTATUS counters} ** ** These preprocessor macros define integer codes that name counter ** values associated with the [sqlite3_stmt_status()] interface. ** The meanings of the various counters are as follows: ** ** <dl> -** <dt>SQLITE_STMTSTATUS_FULLSCAN_STEP</dt> +** [[SQLITE_STMTSTATUS_FULLSCAN_STEP]] <dt>SQLITE_STMTSTATUS_FULLSCAN_STEP</dt> ** <dd>^This is the number of times that SQLite has stepped forward in ** a table as part of a full table scan. Large numbers for this counter ** may indicate opportunities for performance improvement through ** careful use of indices.</dd> ** -** <dt>SQLITE_STMTSTATUS_SORT</dt> +** [[SQLITE_STMTSTATUS_SORT]] <dt>SQLITE_STMTSTATUS_SORT</dt> ** <dd>^This is the number of sort operations that have occurred. ** A non-zero value in this counter may indicate an opportunity to ** improvement performance through careful use of indices.</dd> ** -** <dt>SQLITE_STMTSTATUS_AUTOINDEX</dt> +** [[SQLITE_STMTSTATUS_AUTOINDEX]] <dt>SQLITE_STMTSTATUS_AUTOINDEX</dt> ** <dd>^This is the number of rows inserted into transient indices that ** were created automatically in order to help joins run faster. ** A non-zero value in this counter may indicate an opportunity to @@ -5727,6 +5897,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** the application may discard the parameter after the call to ** [sqlite3_config()] returns.)^ ** +** [[the xInit() page cache method]] ** ^(The xInit() method is called once for each effective ** call to [sqlite3_initialize()])^ ** (usually only once during the lifetime of the process). ^(The xInit() @@ -5737,6 +5908,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** built-in default page cache is used instead of the application defined ** page cache.)^ ** +** [[the xShutdown() page cache method]] ** ^The xShutdown() method is called by [sqlite3_shutdown()]. ** It can be used to clean up ** any outstanding resources before process shutdown, if required. @@ -5751,6 +5923,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** ^SQLite will never invoke xInit() more than once without an intervening ** call to xShutdown(). ** +** [[the xCreate() page cache methods]] ** ^SQLite invokes the xCreate() method to construct a new cache instance. ** SQLite will typically create one cache instance for each open database file, ** though this is not guaranteed. ^The @@ -5775,6 +5948,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** ^Hence, a cache created with bPurgeable false will ** never contain any unpinned pages. ** +** [[the xCachesize() page cache method]] ** ^(The xCachesize() method may be called at any time by SQLite to set the ** suggested maximum cache-size (number of pages stored by) the cache ** instance passed as the first argument. This is the value configured using @@ -5782,14 +5956,16 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** parameter, the implementation is not required to do anything with this ** value; it is advisory only. ** +** [[the xPagecount() page cache methods]] ** The xPagecount() method must return the number of pages currently ** stored in the cache, both pinned and unpinned. ** +** [[the xFetch() page cache methods]] ** The xFetch() method locates a page in the cache and returns a pointer to ** the page, or a NULL pointer. ** A "page", in this context, means a buffer of szPage bytes aligned at an ** 8-byte boundary. The page to be fetched is determined by the key. ^The -** mimimum key value is 1. After it has been retrieved using xFetch, the page +** minimum key value is 1. After it has been retrieved using xFetch, the page ** is considered to be "pinned". ** ** If the requested page is already in the page cache, then the page cache @@ -5813,6 +5989,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** attempt to unpin one or more cache pages by spilling the content of ** pinned pages to disk and synching the operating system disk cache. ** +** [[the xUnpin() page cache method]] ** ^xUnpin() is called by SQLite with a pointer to a currently pinned page ** as its second argument. If the third parameter, discard, is non-zero, ** then the page must be evicted from the cache. @@ -5825,6 +6002,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** call to xUnpin() unpins the page regardless of the number of prior calls ** to xFetch(). ** +** [[the xRekey() page cache methods]] ** The xRekey() method is used to change the key value associated with the ** page passed as the second argument. If the cache ** previously contains an entry associated with newKey, it must be @@ -5837,6 +6015,7 @@ typedef struct sqlite3_pcache sqlite3_pcache; ** of these pages are pinned, they are implicitly unpinned, meaning that ** they can be safely discarded. ** +** [[the xDestroy() page cache method]] ** ^The xDestroy() method is used to delete a cache allocated by xCreate(). ** All resources associated with the specified cache should be freed. ^After ** calling the xDestroy() method, SQLite considers the [sqlite3_pcache*] @@ -5899,7 +6078,7 @@ typedef struct sqlite3_backup sqlite3_backup; ** There should be exactly one call to sqlite3_backup_finish() for each ** successful call to sqlite3_backup_init(). ** -** <b>sqlite3_backup_init()</b> +** [[sqlite3_backup_init()]] <b>sqlite3_backup_init()</b> ** ** ^The D and N arguments to sqlite3_backup_init(D,N,S,M) are the ** [database connection] associated with the destination database @@ -5926,7 +6105,7 @@ typedef struct sqlite3_backup sqlite3_backup; ** sqlite3_backup_finish() functions to perform the specified backup ** operation. ** -** <b>sqlite3_backup_step()</b> +** [[sqlite3_backup_step()]] <b>sqlite3_backup_step()</b> ** ** ^Function sqlite3_backup_step(B,N) will copy up to N pages between ** the source and destination databases specified by [sqlite3_backup] object B. @@ -5983,7 +6162,7 @@ typedef struct sqlite3_backup sqlite3_backup; ** by the backup operation, then the backup database is automatically ** updated at the same time. ** -** <b>sqlite3_backup_finish()</b> +** [[sqlite3_backup_finish()]] <b>sqlite3_backup_finish()</b> ** ** When sqlite3_backup_step() has returned [SQLITE_DONE], or when the ** application wishes to abandon the backup operation, the application @@ -6006,7 +6185,8 @@ typedef struct sqlite3_backup sqlite3_backup; ** is not a permanent error and does not affect the return value of ** sqlite3_backup_finish(). ** -** <b>sqlite3_backup_remaining(), sqlite3_backup_pagecount()</b> +** [[sqlite3_backup__remaining()]] [[sqlite3_backup_pagecount()]] +** <b>sqlite3_backup_remaining() and sqlite3_backup_pagecount()</b> ** ** ^Each call to sqlite3_backup_step() sets two values inside ** the [sqlite3_backup] object: the number of pages still to be backed @@ -6392,6 +6572,93 @@ SQLITE_API int sqlite3_wal_checkpoint_v2( #define SQLITE_CHECKPOINT_FULL 1 #define SQLITE_CHECKPOINT_RESTART 2 +/* +** CAPI3REF: Virtual Table Interface Configuration +** +** This function may be called by either the [xConnect] or [xCreate] method +** of a [virtual table] implementation to configure +** various facets of the virtual table interface. +** +** If this interface is invoked outside the context of an xConnect or +** xCreate virtual table method then the behavior is undefined. +** +** At present, there is only one option that may be configured using +** this function. (See [SQLITE_VTAB_CONSTRAINT_SUPPORT].) Further options +** may be added in the future. +*/ +SQLITE_API int sqlite3_vtab_config(sqlite3*, int op, ...); + +/* +** CAPI3REF: Virtual Table Configuration Options +** +** These macros define the various options to the +** [sqlite3_vtab_config()] interface that [virtual table] implementations +** can use to customize and optimize their behavior. +** +** <dl> +** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT +** <dd>Calls of the form +** [sqlite3_vtab_config](db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported, +** where X is an integer. If X is zero, then the [virtual table] whose +** [xCreate] or [xConnect] method invoked [sqlite3_vtab_config()] does not +** support constraints. In this configuration (which is the default) if +** a call to the [xUpdate] method returns [SQLITE_CONSTRAINT], then the entire +** statement is rolled back as if [ON CONFLICT | OR ABORT] had been +** specified as part of the users SQL statement, regardless of the actual +** ON CONFLICT mode specified. +** +** If X is non-zero, then the virtual table implementation guarantees +** that if [xUpdate] returns [SQLITE_CONSTRAINT], it will do so before +** any modifications to internal or persistent data structures have been made. +** If the [ON CONFLICT] mode is ABORT, FAIL, IGNORE or ROLLBACK, SQLite +** is able to roll back a statement or database transaction, and abandon +** or continue processing the current SQL statement as appropriate. +** If the ON CONFLICT mode is REPLACE and the [xUpdate] method returns +** [SQLITE_CONSTRAINT], SQLite handles this as if the ON CONFLICT mode +** had been ABORT. +** +** Virtual table implementations that are required to handle OR REPLACE +** must do so within the [xUpdate] method. If a call to the +** [sqlite3_vtab_on_conflict()] function indicates that the current ON +** CONFLICT policy is REPLACE, the virtual table implementation should +** silently replace the appropriate rows within the xUpdate callback and +** return SQLITE_OK. Or, if this is not possible, it may return +** SQLITE_CONSTRAINT, in which case SQLite falls back to OR ABORT +** constraint handling. +** </dl> +*/ +#define SQLITE_VTAB_CONSTRAINT_SUPPORT 1 + +/* +** CAPI3REF: Determine The Virtual Table Conflict Policy +** +** This function may only be called from within a call to the [xUpdate] method +** of a [virtual table] implementation for an INSERT or UPDATE operation. ^The +** value returned is one of [SQLITE_ROLLBACK], [SQLITE_IGNORE], [SQLITE_FAIL], +** [SQLITE_ABORT], or [SQLITE_REPLACE], according to the [ON CONFLICT] mode +** of the SQL statement that triggered the call to the [xUpdate] method of the +** [virtual table]. +*/ +SQLITE_API int sqlite3_vtab_on_conflict(sqlite3 *); + +/* +** CAPI3REF: Conflict resolution modes +** +** These constants are returned by [sqlite3_vtab_on_conflict()] to +** inform a [virtual table] implementation what the [ON CONFLICT] mode +** is for the SQL statement being evaluated. +** +** Note that the [SQLITE_IGNORE] constant is also used as a potential +** return value from the [sqlite3_set_authorizer()] callback and that +** [SQLITE_ABORT] is also a [result code]. +*/ +#define SQLITE_ROLLBACK 1 +/* #define SQLITE_IGNORE 2 // Also used by sqlite3_authorizer() callback */ +#define SQLITE_FAIL 3 +/* #define SQLITE_ABORT 4 // Also an error code */ +#define SQLITE_REPLACE 5 + + /* ** Undo the hack that converts floating point types to integer for |