Pragma statements supported by SQLite. Small. Fast. Reliable. Choose any three. The PRAGMA statement is an SQL extension specific to SQLite and used to. SQLite library or to query the SQLite library for. The PRAGMA statement is issued using the same. SQLite commands e. SELECT, INSERT but is. Specific pragma statements may be removed and others added in future. SQLite. There is no guarantee of backwards compatibility. No error messages are generated if an unknown pragma is issued. Unknown pragmas are simply ignored. This means if there is a typo in. Some pragmas take effect during the SQL compilation stage, not the. This means if using the C language sqlite. API or similar in a wrapper. SQL statements do. SAP Adaptive Server Enterprise 16. Release Bulletin SAP Adaptive Server Enterprise 16. HPUX Release Bulletin SAP Adaptive Server Enterprise 16. IBM AIX. Or the pragma might run during sqlite. SQL statements. Whether or not the pragma runs during sqlite. The pragma command is specific to SQLite and is. SQL database engine. The C language API for SQLite provides the SQLITEFCNTLPRAGMAfile control which gives VFS implementations the. PRAGMA statements or to override the meaning of. PRAGMA statements. PRAGMA command syntaxpragma stmt hide. A pragma can take either zero or one argument. The argument is may be either. The two syntaxes yield identical results. In many pragmas, the argument is a boolean. The boolean can be one of. Checkpoint License File Format' title='Checkpoint License File Format' />FILExt. Here youll find a collection of file extensions many linked to the programs that created the files. This is the FILExt home. Keyword arguments can optionally appear in quotes. Example yes FALSE. Some pragmas. When pragma takes a keyword. For example, 0 and no mean the same thing, as does 1 and yes. When querying the value of a setting, many pragmas return the number. A pragma may have an optional schema name. The schema name is the name of an ATTACH ed database. Checkpoint License File Format' title='Checkpoint License File Format' />TEMP databases. If the optional. In some pragmas, the schema. In the documentation below. PRAGMA functions. PRAGMAs that return results and that have no side effects can be. SELECT statements as table valued functions. For each participating PRAGMA, the corresponding table valued function. PRAGMA with a 7 character pragma prefix. The PRAGMA argument and schema, if any, are passed as arguments to. For example, information about the columns in an index can be. PRAGMA indexinfoidx. Or, the same content can be read using. SELECT FROM pragmaindexinfoidx. The advantage of the table valued function format is that the query. PRAGMA columns, can include a WHERE clause. For example, to get a list of all indexed columns in a schema, one. SELECT DISTINCT m. AS indexed columns. FROM sqlitemaster AS m. AS il. pragmaindexinfoil. AS ii. WHERE m. typetable. Additional notes. Table valued functions exist only for built in PRAGMAs, not for PRAGMAs. SQLITEFCNTLPRAGMA file control. Table valued functions exist only for PRAGMAs that return results and. This feature could be used to implement. ATTACH memory AS informationschema. VIEWs in that schema that implement the official information schema. PRAGMA functions. This feature is experimental and is subject to change. Further documentation. PRAGMAs. feature becomes officially supported. The table valued functions for PRAGMA feature was added. SQLite version 3. Prior versions of SQLite. List Of PRAGMAs. Notes. Pragmas whose names are struck through. Do not use them. They exist. These pragmas are used for debugging SQLite and. SQLite is compiled using SQLITEDEBUG. These pragmas are used for testing SQLite and are not recommended. PRAGMA applicationid. PRAGMA schema. applicationid. PRAGMA schema. applicationid integer The applicationid PRAGMA is used to query or set the 3. Application ID integer located at offset. Applications that use SQLite as their. Application ID integer to. SQLite. 3 Database. A list of. assigned application IDs can be seen by consulting the. SQLite source repository. See also the userversion pragma. PRAGMA autovacuum. PRAGMA schema. autovacuum PRAGMA schema. NONE 1 FULL 2 INCREMENTAL Query or set the auto vacuum status in the database. The default setting for auto vacuum is 0 or none. SQLITEDEFAULTAUTOVACUUM compile time option is used. The none setting means that auto vacuum is disabled. When auto vacuum is disabled and data is deleted data from a database. Unused database file. So. no database file space is lost. However, the database file does not. In this mode the VACUUM. When the auto vacuum mode is 1 or full, the freelist pages are. Note, however, that auto vacuum only truncates the freelist pages. Auto vacuum does not defragment the database nor. VACUUM command does. In fact, because. Auto vacuuming is only possible if the database stores some. Therefore, auto vacuuming must. It is not possible. When the value of auto vacuum is 2 or incremental then the additional. In incremental mode, the separate. The database connection can be changed between full and incremental. However, changing from. VACUUM command. To. VACUUM command to. To change from full or. VACUUM even. on an empty database. When the autovacuum pragma is invoked with no arguments, it. PRAGMA automaticindex. PRAGMA automaticindex. PRAGMA automaticindex boolean Query, set, or clear the automatic indexing capability. Automatic indexing is enabled by default as of. SQLite. PRAGMA busytimeout. PRAGMA busytimeout. PRAGMA busytimeout milliseconds Query or change the setting of the. This pragma is an alternative to the sqlite. C language. interface which is made available as a pragma for use with language. Each database connection can only have a single. This PRAGMA sets the busy handler. PRAGMA cachesize. PRAGMA schema. cachesize. PRAGMA schema. cachesize pages. PRAGMA schema. cachesize kibibytes Query or change the suggested maximum number of database disk pages. SQLite will hold in memory at once per open database file. Whether. or not this suggestion is honored is at the discretion of the. Application Defined Page Cache. The default page cache that is built into SQLite honors the request. The default suggested cache size is 2. The default suggested cache size can be altered using the. SQLITEDEFAULTCACHESIZE compile time options. The TEMP database has a default suggested cache size of 0 pages. If the argument N is positive then the suggested cache size is set. N. If the argument N is negative, then the. N. 02. 4 bytes. Backwards compatibility note. The behavior of cachesize with a negative N. In. version 3. 7. N. When you change the cache size using the cachesize pragma, the. The cache size reverts. PRAGMA cachespill. PRAGMA cachespill. PRAGMA cachespillboolean. Iphoto 9 5 Dmg Files. PRAGMA schema. cachespillN The cachespill pragma enables or disables the ability of the pager. Cachespill is enabled by default and most applications. However, a cache spill has the side effect of acquiring an. EXCLUSIVE lock on the database file. Hence, some applications that. COMMITs. The PRAGMA cachespillN form of this pragma sets a minimum. The number of pages. PRAGMA cachesize statement in order for spilling to. The PRAGMA cachespillboolean form of this pragma applies. But the. PRAGMA cachespillN form of this statement only applies to. PRAGMA casesensitivelike. PRAGMA casesensitivelike boolean The default behavior of the LIKE operator is to ignore case. ASCII characters. Hence, by default a LIKE A is. The casesensitivelike pragma installs a new application defined. LIKE function that is either case sensitive or insensitive depending. When casesensitivelike is disabled, the default LIKE behavior is. When casesensitivelike is enabled, case becomes. So, for example. a LIKE A is false but a LIKE a is still true. This pragma uses sqlite.
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