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Diffstat (limited to 'lib/libsqlite3/src/pragma.c')
| -rw-r--r-- | lib/libsqlite3/src/pragma.c | 1925 |
1 files changed, 0 insertions, 1925 deletions
diff --git a/lib/libsqlite3/src/pragma.c b/lib/libsqlite3/src/pragma.c deleted file mode 100644 index 64614a7ebcd..00000000000 --- a/lib/libsqlite3/src/pragma.c +++ /dev/null @@ -1,1925 +0,0 @@ -/* -** 2003 April 6 -** -** The author disclaims copyright to this source code. In place of -** a legal notice, here is a blessing: -** -** May you do good and not evil. -** May you find forgiveness for yourself and forgive others. -** May you share freely, never taking more than you give. -** -************************************************************************* -** This file contains code used to implement the PRAGMA command. -*/ -#include "sqliteInt.h" - -#if !defined(SQLITE_ENABLE_LOCKING_STYLE) -# if defined(__APPLE__) -# define SQLITE_ENABLE_LOCKING_STYLE 1 -# else -# define SQLITE_ENABLE_LOCKING_STYLE 0 -# endif -#endif - -/*************************************************************************** -** The "pragma.h" include file is an automatically generated file that -** that includes the PragType_XXXX macro definitions and the aPragmaName[] -** object. This ensures that the aPragmaName[] table is arranged in -** lexicographical order to facility a binary search of the pragma name. -** Do not edit pragma.h directly. Edit and rerun the script in at -** ../tool/mkpragmatab.tcl. */ -#include "pragma.h" - -/* -** 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 -** unrecognized string argument. The FULL option is disallowed -** if the omitFull parameter it 1. -** -** Note that the values returned are one less that the values that -** should be passed into sqlite3BtreeSetSafetyLevel(). The is done -** to support legacy SQL code. The safety level used to be boolean -** and older scripts may have used numbers 0 for OFF and 1 for ON. -*/ -static u8 getSafetyLevel(const char *z, int omitFull, u8 dflt){ - /* 123456789 123456789 */ - static const char zText[] = "onoffalseyestruefull"; - static const u8 iOffset[] = {0, 1, 2, 4, 9, 12, 16}; - static const u8 iLength[] = {2, 2, 3, 5, 3, 4, 4}; - static const u8 iValue[] = {1, 0, 0, 0, 1, 1, 2}; - int i, n; - if( sqlite3Isdigit(*z) ){ - return (u8)sqlite3Atoi(z); - } - n = sqlite3Strlen30(z); - for(i=0; i<ArraySize(iLength)-omitFull; i++){ - if( iLength[i]==n && sqlite3StrNICmp(&zText[iOffset[i]],z,n)==0 ){ - return iValue[i]; - } - } - return dflt; -} - -/* -** Interpret the given string as a boolean value. -*/ -u8 sqlite3GetBoolean(const char *z, u8 dflt){ - return getSafetyLevel(z,1,dflt)!=0; -} - -/* 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. -*/ -static int getLockingMode(const char *z){ - if( z ){ - if( 0==sqlite3StrICmp(z, "exclusive") ) return PAGER_LOCKINGMODE_EXCLUSIVE; - if( 0==sqlite3StrICmp(z, "normal") ) return PAGER_LOCKINGMODE_NORMAL; - } - return PAGER_LOCKINGMODE_QUERY; -} - -#ifndef SQLITE_OMIT_AUTOVACUUM -/* -** Interpret the given string as an auto-vacuum mode value. -** -** The following strings, "none", "full" and "incremental" are -** acceptable, as are their numeric equivalents: 0, 1 and 2 respectively. -*/ -static int getAutoVacuum(const char *z){ - int i; - if( 0==sqlite3StrICmp(z, "none") ) return BTREE_AUTOVACUUM_NONE; - if( 0==sqlite3StrICmp(z, "full") ) return BTREE_AUTOVACUUM_FULL; - if( 0==sqlite3StrICmp(z, "incremental") ) return BTREE_AUTOVACUUM_INCR; - i = sqlite3Atoi(z); - return (u8)((i>=0&&i<=2)?i:0); -} -#endif /* ifndef SQLITE_OMIT_AUTOVACUUM */ - -#ifndef SQLITE_OMIT_PAGER_PRAGMAS -/* -** Interpret the given string as a temp db location. Return 1 for file -** backed temporary databases, 2 for the Red-Black tree in memory database -** and 0 to use the compile-time default. -*/ -static int getTempStore(const char *z){ - if( z[0]>='0' && z[0]<='2' ){ - return z[0] - '0'; - }else if( sqlite3StrICmp(z, "file")==0 ){ - return 1; - }else if( sqlite3StrICmp(z, "memory")==0 ){ - return 2; - }else{ - return 0; - } -} -#endif /* SQLITE_PAGER_PRAGMAS */ - -#ifndef SQLITE_OMIT_PAGER_PRAGMAS -/* -** Invalidate temp storage, either when the temp storage is changed -** from default, or when 'file' and the temp_store_directory has changed -*/ -static int invalidateTempStorage(Parse *pParse){ - sqlite3 *db = pParse->db; - if( db->aDb[1].pBt!=0 ){ - if( !db->autoCommit || sqlite3BtreeIsInReadTrans(db->aDb[1].pBt) ){ - sqlite3ErrorMsg(pParse, "temporary storage cannot be changed " - "from within a transaction"); - return SQLITE_ERROR; - } - sqlite3BtreeClose(db->aDb[1].pBt); - db->aDb[1].pBt = 0; - sqlite3ResetAllSchemasOfConnection(db); - } - return SQLITE_OK; -} -#endif /* SQLITE_PAGER_PRAGMAS */ - -#ifndef SQLITE_OMIT_PAGER_PRAGMAS -/* -** If the TEMP database is open, close it and mark the database schema -** as needing reloading. This must be done when using the SQLITE_TEMP_STORE -** or DEFAULT_TEMP_STORE pragmas. -*/ -static int changeTempStorage(Parse *pParse, const char *zStorageType){ - int ts = getTempStore(zStorageType); - sqlite3 *db = pParse->db; - if( db->temp_store==ts ) return SQLITE_OK; - if( invalidateTempStorage( pParse ) != SQLITE_OK ){ - return SQLITE_ERROR; - } - db->temp_store = (u8)ts; - return SQLITE_OK; -} -#endif /* SQLITE_PAGER_PRAGMAS */ - -/* -** Set the names of the first N columns to the values in azCol[] -*/ -static void setAllColumnNames( - Vdbe *v, /* The query under construction */ - int N, /* Number of columns */ - const char **azCol /* Names of columns */ -){ - int i; - sqlite3VdbeSetNumCols(v, N); - for(i=0; i<N; i++){ - sqlite3VdbeSetColName(v, i, COLNAME_NAME, azCol[i], SQLITE_STATIC); - } -} -static void setOneColumnName(Vdbe *v, const char *z){ - setAllColumnNames(v, 1, &z); -} - -/* -** Generate code to return a single integer value. -*/ -static void returnSingleInt(Vdbe *v, const char *zLabel, i64 value){ - sqlite3VdbeAddOp4Dup8(v, OP_Int64, 0, 1, 0, (const u8*)&value, P4_INT64); - setOneColumnName(v, zLabel); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1); -} - -/* -** Generate code to return a single text value. -*/ -static void returnSingleText( - Vdbe *v, /* Prepared statement under construction */ - const char *zLabel, /* Name of the result column */ - const char *zValue /* Value to be returned */ -){ - if( zValue ){ - sqlite3VdbeLoadString(v, 1, (const char*)zValue); - setOneColumnName(v, zLabel); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1); - } -} - - -/* -** Set the safety_level and pager flags for pager iDb. Or if iDb<0 -** set these values for all pagers. -*/ -#ifndef SQLITE_OMIT_PAGER_PRAGMAS -static void setAllPagerFlags(sqlite3 *db){ - if( db->autoCommit ){ - Db *pDb = db->aDb; - int n = db->nDb; - assert( SQLITE_FullFSync==PAGER_FULLFSYNC ); - assert( SQLITE_CkptFullFSync==PAGER_CKPT_FULLFSYNC ); - assert( SQLITE_CacheSpill==PAGER_CACHESPILL ); - assert( (PAGER_FULLFSYNC | PAGER_CKPT_FULLFSYNC | PAGER_CACHESPILL) - == PAGER_FLAGS_MASK ); - assert( (pDb->safety_level & PAGER_SYNCHRONOUS_MASK)==pDb->safety_level ); - while( (n--) > 0 ){ - if( pDb->pBt ){ - sqlite3BtreeSetPagerFlags(pDb->pBt, - pDb->safety_level | (db->flags & PAGER_FLAGS_MASK) ); - } - pDb++; - } - } -} -#else -# define setAllPagerFlags(X) /* no-op */ -#endif - - -/* -** Return a human-readable name for a constraint resolution action. -*/ -#ifndef SQLITE_OMIT_FOREIGN_KEY -static const char *actionName(u8 action){ - const char *zName; - switch( action ){ - case OE_SetNull: zName = "SET NULL"; break; - case OE_SetDflt: zName = "SET DEFAULT"; break; - case OE_Cascade: zName = "CASCADE"; break; - case OE_Restrict: zName = "RESTRICT"; break; - default: zName = "NO ACTION"; - assert( action==OE_None ); break; - } - return zName; -} -#endif - - -/* -** Parameter eMode must be one of the PAGER_JOURNALMODE_XXX constants -** defined in pager.h. This function returns the associated lowercase -** journal-mode name. -*/ -const char *sqlite3JournalModename(int eMode){ - static char * const azModeName[] = { - "delete", "persist", "off", "truncate", "memory" -#ifndef SQLITE_OMIT_WAL - , "wal" -#endif - }; - assert( PAGER_JOURNALMODE_DELETE==0 ); - assert( PAGER_JOURNALMODE_PERSIST==1 ); - assert( PAGER_JOURNALMODE_OFF==2 ); - assert( PAGER_JOURNALMODE_TRUNCATE==3 ); - assert( PAGER_JOURNALMODE_MEMORY==4 ); - assert( PAGER_JOURNALMODE_WAL==5 ); - assert( eMode>=0 && eMode<=ArraySize(azModeName) ); - - if( eMode==ArraySize(azModeName) ) return 0; - return azModeName[eMode]; -} - -/* -** Process a pragma statement. -** -** Pragmas are of this form: -** -** PRAGMA [database.]id [= value] -** -** The identifier might also be a string. The value is a string, and -** identifier, or a number. If minusFlag is true, then the value is -** a number that was preceded by a minus sign. -** -** If the left side is "database.id" then pId1 is the database name -** and pId2 is the id. If the left side is just "id" then pId1 is the -** id and pId2 is any empty string. -*/ -void sqlite3Pragma( - Parse *pParse, - Token *pId1, /* First part of [database.]id field */ - Token *pId2, /* Second part of [database.]id field, or NULL */ - Token *pValue, /* Token for <value>, or NULL */ - int minusFlag /* True if a '-' sign preceded <value> */ -){ - char *zLeft = 0; /* Nul-terminated UTF-8 string <id> */ - char *zRight = 0; /* Nul-terminated UTF-8 string <value>, or NULL */ - const char *zDb = 0; /* The database name */ - Token *pId; /* Pointer to <id> token */ - char *aFcntl[4]; /* Argument to SQLITE_FCNTL_PRAGMA */ - int iDb; /* Database index for <database> */ - int lwr, upr, mid = 0; /* Binary search bounds */ - int rc; /* return value form SQLITE_FCNTL_PRAGMA */ - sqlite3 *db = pParse->db; /* The database connection */ - Db *pDb; /* The specific database being pragmaed */ - Vdbe *v = sqlite3GetVdbe(pParse); /* Prepared statement */ - const struct sPragmaNames *pPragma; - - if( v==0 ) return; - sqlite3VdbeRunOnlyOnce(v); - pParse->nMem = 2; - - /* Interpret the [database.] part of the pragma statement. iDb is the - ** index of the database this pragma is being applied to in db.aDb[]. */ - iDb = sqlite3TwoPartName(pParse, pId1, pId2, &pId); - if( iDb<0 ) return; - pDb = &db->aDb[iDb]; - - /* If the temp database has been explicitly named as part of the - ** pragma, make sure it is open. - */ - if( iDb==1 && sqlite3OpenTempDatabase(pParse) ){ - return; - } - - zLeft = sqlite3NameFromToken(db, pId); - if( !zLeft ) return; - if( minusFlag ){ - zRight = sqlite3MPrintf(db, "-%T", pValue); - }else{ - zRight = sqlite3NameFromToken(db, pValue); - } - - assert( pId2 ); - zDb = pId2->n>0 ? pDb->zName : 0; - if( sqlite3AuthCheck(pParse, SQLITE_PRAGMA, zLeft, zRight, zDb) ){ - goto pragma_out; - } - - /* Send an SQLITE_FCNTL_PRAGMA file-control to the underlying VFS - ** connection. If it returns SQLITE_OK, then assume that the VFS - ** handled the pragma and generate a no-op prepared statement. - ** - ** IMPLEMENTATION-OF: R-12238-55120 Whenever a PRAGMA statement is parsed, - ** an SQLITE_FCNTL_PRAGMA file control is sent to the open sqlite3_file - ** object corresponding to the database file to which the pragma - ** statement refers. - ** - ** IMPLEMENTATION-OF: R-29875-31678 The argument to the SQLITE_FCNTL_PRAGMA - ** file control is an array of pointers to strings (char**) in which the - ** second element of the array is the name of the pragma and the third - ** element is the argument to the pragma or NULL if the pragma has no - ** argument. - */ - aFcntl[0] = 0; - aFcntl[1] = zLeft; - aFcntl[2] = zRight; - aFcntl[3] = 0; - db->busyHandler.nBusy = 0; - rc = sqlite3_file_control(db, zDb, SQLITE_FCNTL_PRAGMA, (void*)aFcntl); - if( rc==SQLITE_OK ){ - returnSingleText(v, "result", aFcntl[0]); - sqlite3_free(aFcntl[0]); - goto pragma_out; - } - if( rc!=SQLITE_NOTFOUND ){ - if( aFcntl[0] ){ - sqlite3ErrorMsg(pParse, "%s", aFcntl[0]); - sqlite3_free(aFcntl[0]); - } - pParse->nErr++; - pParse->rc = rc; - goto pragma_out; - } - - /* Locate the pragma in the lookup table */ - lwr = 0; - upr = ArraySize(aPragmaNames)-1; - while( lwr<=upr ){ - mid = (lwr+upr)/2; - rc = sqlite3_stricmp(zLeft, aPragmaNames[mid].zName); - if( rc==0 ) break; - if( rc<0 ){ - upr = mid - 1; - }else{ - lwr = mid + 1; - } - } - if( lwr>upr ) goto pragma_out; - pPragma = &aPragmaNames[mid]; - - /* Make sure the database schema is loaded if the pragma requires that */ - if( (pPragma->mPragFlag & PragFlag_NeedSchema)!=0 ){ - if( sqlite3ReadSchema(pParse) ) goto pragma_out; - } - - /* Jump to the appropriate pragma handler */ - switch( pPragma->ePragTyp ){ - -#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED) - /* - ** PRAGMA [database.]default_cache_size - ** PRAGMA [database.]default_cache_size=N - ** - ** The first form reports the current persistent setting for the - ** page cache size. The value returned is the maximum number of - ** pages in the page cache. The second form sets both the current - ** page cache size value and the persistent page cache size value - ** stored in the database file. - ** - ** Older versions of SQLite would set the default cache size to a - ** negative number to indicate synchronous=OFF. These days, synchronous - ** is always on by default regardless of the sign of the default cache - ** size. But continue to take the absolute value of the default cache - ** size of historical compatibility. - */ - case PragTyp_DEFAULT_CACHE_SIZE: { - static const int iLn = VDBE_OFFSET_LINENO(2); - static const VdbeOpList getCacheSize[] = { - { OP_Transaction, 0, 0, 0}, /* 0 */ - { OP_ReadCookie, 0, 1, BTREE_DEFAULT_CACHE_SIZE}, /* 1 */ - { OP_IfPos, 1, 8, 0}, - { OP_Integer, 0, 2, 0}, - { OP_Subtract, 1, 2, 1}, - { OP_IfPos, 1, 8, 0}, - { OP_Integer, 0, 1, 0}, /* 6 */ - { OP_Noop, 0, 0, 0}, - { OP_ResultRow, 1, 1, 0}, - }; - int addr; - sqlite3VdbeUsesBtree(v, iDb); - if( !zRight ){ - setOneColumnName(v, "cache_size"); - pParse->nMem += 2; - addr = sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize,iLn); - sqlite3VdbeChangeP1(v, addr, iDb); - sqlite3VdbeChangeP1(v, addr+1, iDb); - sqlite3VdbeChangeP1(v, addr+6, SQLITE_DEFAULT_CACHE_SIZE); - }else{ - int size = sqlite3AbsInt32(sqlite3Atoi(zRight)); - sqlite3BeginWriteOperation(pParse, 0, iDb); - sqlite3VdbeAddOp2(v, OP_Integer, size, 1); - sqlite3VdbeAddOp3(v, OP_SetCookie, iDb, BTREE_DEFAULT_CACHE_SIZE, 1); - assert( sqlite3SchemaMutexHeld(db, iDb, 0) ); - pDb->pSchema->cache_size = size; - sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size); - } - break; - } -#endif /* !SQLITE_OMIT_PAGER_PRAGMAS && !SQLITE_OMIT_DEPRECATED */ - -#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) - /* - ** PRAGMA [database.]page_size - ** PRAGMA [database.]page_size=N - ** - ** The first form reports the current setting for the - ** database page size in bytes. The second form sets the - ** database page size value. The value can only be set if - ** the database has not yet been created. - */ - case PragTyp_PAGE_SIZE: { - Btree *pBt = pDb->pBt; - assert( pBt!=0 ); - if( !zRight ){ - int size = ALWAYS(pBt) ? sqlite3BtreeGetPageSize(pBt) : 0; - returnSingleInt(v, "page_size", size); - }else{ - /* Malloc may fail when setting the page-size, as there is an internal - ** buffer that the pager module resizes using sqlite3_realloc(). - */ - db->nextPagesize = sqlite3Atoi(zRight); - if( SQLITE_NOMEM==sqlite3BtreeSetPageSize(pBt, db->nextPagesize,-1,0) ){ - db->mallocFailed = 1; - } - } - break; - } - - /* - ** PRAGMA [database.]secure_delete - ** PRAGMA [database.]secure_delete=ON/OFF - ** - ** The first form reports the current setting for the - ** secure_delete flag. The second form changes the secure_delete - ** flag setting and reports thenew value. - */ - case PragTyp_SECURE_DELETE: { - Btree *pBt = pDb->pBt; - int b = -1; - assert( pBt!=0 ); - if( zRight ){ - b = sqlite3GetBoolean(zRight, 0); - } - if( pId2->n==0 && b>=0 ){ - int ii; - for(ii=0; ii<db->nDb; ii++){ - sqlite3BtreeSecureDelete(db->aDb[ii].pBt, b); - } - } - b = sqlite3BtreeSecureDelete(pBt, b); - returnSingleInt(v, "secure_delete", b); - break; - } - - /* - ** PRAGMA [database.]max_page_count - ** PRAGMA [database.]max_page_count=N - ** - ** The first form reports the current setting for the - ** maximum number of pages in the database file. The - ** second form attempts to change this setting. Both - ** forms return the current setting. - ** - ** The absolute value of N is used. This is undocumented and might - ** change. The only purpose is to provide an easy way to test - ** the sqlite3AbsInt32() function. - ** - ** PRAGMA [database.]page_count - ** - ** Return the number of pages in the specified database. - */ - case PragTyp_PAGE_COUNT: { - int iReg; - sqlite3CodeVerifySchema(pParse, iDb); - iReg = ++pParse->nMem; - if( sqlite3Tolower(zLeft[0])=='p' ){ - sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg); - }else{ - sqlite3VdbeAddOp3(v, OP_MaxPgcnt, iDb, iReg, - sqlite3AbsInt32(sqlite3Atoi(zRight))); - } - sqlite3VdbeAddOp2(v, OP_ResultRow, iReg, 1); - sqlite3VdbeSetNumCols(v, 1); - sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, SQLITE_TRANSIENT); - break; - } - - /* - ** PRAGMA [database.]locking_mode - ** PRAGMA [database.]locking_mode = (normal|exclusive) - */ - case PragTyp_LOCKING_MODE: { - const char *zRet = "normal"; - int eMode = getLockingMode(zRight); - - if( pId2->n==0 && eMode==PAGER_LOCKINGMODE_QUERY ){ - /* Simple "PRAGMA locking_mode;" statement. This is a query for - ** the current default locking mode (which may be different to - ** the locking-mode of the main database). - */ - eMode = db->dfltLockMode; - }else{ - Pager *pPager; - if( pId2->n==0 ){ - /* This indicates that no database name was specified as part - ** of the PRAGMA command. In this case the locking-mode must be - ** set on all attached databases, as well as the main db file. - ** - ** Also, the sqlite3.dfltLockMode variable is set so that - ** any subsequently attached databases also use the specified - ** locking mode. - */ - int ii; - assert(pDb==&db->aDb[0]); - for(ii=2; ii<db->nDb; ii++){ - pPager = sqlite3BtreePager(db->aDb[ii].pBt); - sqlite3PagerLockingMode(pPager, eMode); - } - db->dfltLockMode = (u8)eMode; - } - pPager = sqlite3BtreePager(pDb->pBt); - eMode = sqlite3PagerLockingMode(pPager, eMode); - } - - assert( eMode==PAGER_LOCKINGMODE_NORMAL - || eMode==PAGER_LOCKINGMODE_EXCLUSIVE ); - if( eMode==PAGER_LOCKINGMODE_EXCLUSIVE ){ - zRet = "exclusive"; - } - returnSingleText(v, "locking_mode", zRet); - break; - } - - /* - ** PRAGMA [database.]journal_mode - ** PRAGMA [database.]journal_mode = - ** (delete|persist|off|truncate|memory|wal|off) - */ - case PragTyp_JOURNAL_MODE: { - int eMode; /* One of the PAGER_JOURNALMODE_XXX symbols */ - int ii; /* Loop counter */ - - setOneColumnName(v, "journal_mode"); - if( zRight==0 ){ - /* If there is no "=MODE" part of the pragma, do a query for the - ** current mode */ - eMode = PAGER_JOURNALMODE_QUERY; - }else{ - const char *zMode; - int n = sqlite3Strlen30(zRight); - for(eMode=0; (zMode = sqlite3JournalModename(eMode))!=0; eMode++){ - if( sqlite3StrNICmp(zRight, zMode, n)==0 ) break; - } - if( !zMode ){ - /* If the "=MODE" part does not match any known journal mode, - ** then do a query */ - eMode = PAGER_JOURNALMODE_QUERY; - } - } - if( eMode==PAGER_JOURNALMODE_QUERY && pId2->n==0 ){ - /* Convert "PRAGMA journal_mode" into "PRAGMA main.journal_mode" */ - iDb = 0; - pId2->n = 1; - } - for(ii=db->nDb-1; ii>=0; ii--){ - if( db->aDb[ii].pBt && (ii==iDb || pId2->n==0) ){ - sqlite3VdbeUsesBtree(v, ii); - sqlite3VdbeAddOp3(v, OP_JournalMode, ii, 1, eMode); - } - } - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1); - break; - } - - /* - ** PRAGMA [database.]journal_size_limit - ** PRAGMA [database.]journal_size_limit=N - ** - ** Get or set the size limit on rollback journal files. - */ - case PragTyp_JOURNAL_SIZE_LIMIT: { - Pager *pPager = sqlite3BtreePager(pDb->pBt); - i64 iLimit = -2; - if( zRight ){ - sqlite3DecOrHexToI64(zRight, &iLimit); - if( iLimit<-1 ) iLimit = -1; - } - iLimit = sqlite3PagerJournalSizeLimit(pPager, iLimit); - returnSingleInt(v, "journal_size_limit", iLimit); - break; - } - -#endif /* SQLITE_OMIT_PAGER_PRAGMAS */ - - /* - ** PRAGMA [database.]auto_vacuum - ** PRAGMA [database.]auto_vacuum=N - ** - ** Get or set the value of the database 'auto-vacuum' parameter. - ** The value is one of: 0 NONE 1 FULL 2 INCREMENTAL - */ -#ifndef SQLITE_OMIT_AUTOVACUUM - case PragTyp_AUTO_VACUUM: { - Btree *pBt = pDb->pBt; - assert( pBt!=0 ); - if( !zRight ){ - returnSingleInt(v, "auto_vacuum", sqlite3BtreeGetAutoVacuum(pBt)); - }else{ - int eAuto = getAutoVacuum(zRight); - assert( eAuto>=0 && eAuto<=2 ); - db->nextAutovac = (u8)eAuto; - /* Call SetAutoVacuum() to set initialize the internal auto and - ** incr-vacuum flags. This is required in case this connection - ** creates the database file. It is important that it is created - ** as an auto-vacuum capable db. - */ - rc = sqlite3BtreeSetAutoVacuum(pBt, eAuto); - if( rc==SQLITE_OK && (eAuto==1 || eAuto==2) ){ - /* When setting the auto_vacuum mode to either "full" or - ** "incremental", write the value of meta[6] in the database - ** file. Before writing to meta[6], check that meta[3] indicates - ** that this really is an auto-vacuum capable database. - */ - static const int iLn = VDBE_OFFSET_LINENO(2); - static const VdbeOpList setMeta6[] = { - { OP_Transaction, 0, 1, 0}, /* 0 */ - { OP_ReadCookie, 0, 1, BTREE_LARGEST_ROOT_PAGE}, - { OP_If, 1, 0, 0}, /* 2 */ - { OP_Halt, SQLITE_OK, OE_Abort, 0}, /* 3 */ - { OP_Integer, 0, 1, 0}, /* 4 */ - { OP_SetCookie, 0, BTREE_INCR_VACUUM, 1}, /* 5 */ - }; - int iAddr; - iAddr = sqlite3VdbeAddOpList(v, ArraySize(setMeta6), setMeta6, iLn); - sqlite3VdbeChangeP1(v, iAddr, iDb); - sqlite3VdbeChangeP1(v, iAddr+1, iDb); - sqlite3VdbeChangeP2(v, iAddr+2, iAddr+4); - sqlite3VdbeChangeP1(v, iAddr+4, eAuto-1); - sqlite3VdbeChangeP1(v, iAddr+5, iDb); - sqlite3VdbeUsesBtree(v, iDb); - } - } - break; - } -#endif - - /* - ** PRAGMA [database.]incremental_vacuum(N) - ** - ** Do N steps of incremental vacuuming on a database. - */ -#ifndef SQLITE_OMIT_AUTOVACUUM - case PragTyp_INCREMENTAL_VACUUM: { - int iLimit, addr; - if( zRight==0 || !sqlite3GetInt32(zRight, &iLimit) || iLimit<=0 ){ - iLimit = 0x7fffffff; - } - sqlite3BeginWriteOperation(pParse, 0, iDb); - sqlite3VdbeAddOp2(v, OP_Integer, iLimit, 1); - addr = sqlite3VdbeAddOp1(v, OP_IncrVacuum, iDb); VdbeCoverage(v); - sqlite3VdbeAddOp1(v, OP_ResultRow, 1); - sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1); - sqlite3VdbeAddOp2(v, OP_IfPos, 1, addr); VdbeCoverage(v); - sqlite3VdbeJumpHere(v, addr); - break; - } -#endif - -#ifndef SQLITE_OMIT_PAGER_PRAGMAS - /* - ** PRAGMA [database.]cache_size - ** PRAGMA [database.]cache_size=N - ** - ** The first form reports the current local setting for the - ** page cache size. The second form sets the local - ** page cache size value. If N is positive then that is the - ** number of pages in the cache. If N is negative, then the - ** number of pages is adjusted so that the cache uses -N kibibytes - ** of memory. - */ - case PragTyp_CACHE_SIZE: { - assert( sqlite3SchemaMutexHeld(db, iDb, 0) ); - if( !zRight ){ - if( sqlite3ReadSchema(pParse) ) goto pragma_out; - returnSingleInt(v, "cache_size", pDb->pSchema->cache_size); - }else{ - int size = sqlite3Atoi(zRight); - pDb->pSchema->cache_size = size; - sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size); - if( sqlite3ReadSchema(pParse) ) goto pragma_out; - } - break; - } - - /* - ** PRAGMA [database.]mmap_size(N) - ** - ** Used to set mapping size limit. The mapping size limit is - ** used to limit the aggregate size of all memory mapped regions of the - ** database file. If this parameter is set to zero, then memory mapping - ** is not used at all. If N is negative, then the default memory map - ** limit determined by sqlite3_config(SQLITE_CONFIG_MMAP_SIZE) is set. - ** The parameter N is measured in bytes. - ** - ** This value is advisory. The underlying VFS is free to memory map - ** as little or as much as it wants. Except, if N is set to 0 then the - ** upper layers will never invoke the xFetch interfaces to the VFS. - */ - case PragTyp_MMAP_SIZE: { - sqlite3_int64 sz; -#if SQLITE_MAX_MMAP_SIZE>0 - assert( sqlite3SchemaMutexHeld(db, iDb, 0) ); - if( zRight ){ - int ii; - sqlite3DecOrHexToI64(zRight, &sz); - if( sz<0 ) sz = sqlite3GlobalConfig.szMmap; - if( pId2->n==0 ) db->szMmap = sz; - for(ii=db->nDb-1; ii>=0; ii--){ - if( db->aDb[ii].pBt && (ii==iDb || pId2->n==0) ){ - sqlite3BtreeSetMmapLimit(db->aDb[ii].pBt, sz); - } - } - } - sz = -1; - rc = sqlite3_file_control(db, zDb, SQLITE_FCNTL_MMAP_SIZE, &sz); -#else - sz = 0; - rc = SQLITE_OK; -#endif - if( rc==SQLITE_OK ){ - returnSingleInt(v, "mmap_size", sz); - }else if( rc!=SQLITE_NOTFOUND ){ - pParse->nErr++; - pParse->rc = rc; - } - break; - } - - /* - ** PRAGMA temp_store - ** PRAGMA temp_store = "default"|"memory"|"file" - ** - ** Return or set the local value of the temp_store flag. Changing - ** the local value does not make changes to the disk file and the default - ** value will be restored the next time the database is opened. - ** - ** Note that it is possible for the library compile-time options to - ** override this setting - */ - case PragTyp_TEMP_STORE: { - if( !zRight ){ - returnSingleInt(v, "temp_store", db->temp_store); - }else{ - changeTempStorage(pParse, zRight); - } - break; - } - - /* - ** PRAGMA temp_store_directory - ** PRAGMA temp_store_directory = ""|"directory_name" - ** - ** Return or set the local value of the temp_store_directory flag. Changing - ** the value sets a specific directory to be used for temporary files. - ** Setting to a null string reverts to the default temporary directory search. - ** If temporary directory is changed, then invalidateTempStorage. - ** - */ - case PragTyp_TEMP_STORE_DIRECTORY: { - if( !zRight ){ - returnSingleText(v, "temp_store_directory", sqlite3_temp_directory); - }else{ -#ifndef SQLITE_OMIT_WSD - if( zRight[0] ){ - int res; - rc = sqlite3OsAccess(db->pVfs, zRight, SQLITE_ACCESS_READWRITE, &res); - if( rc!=SQLITE_OK || res==0 ){ - sqlite3ErrorMsg(pParse, "not a writable directory"); - goto pragma_out; - } - } - if( SQLITE_TEMP_STORE==0 - || (SQLITE_TEMP_STORE==1 && db->temp_store<=1) - || (SQLITE_TEMP_STORE==2 && db->temp_store==1) - ){ - invalidateTempStorage(pParse); - } - sqlite3_free(sqlite3_temp_directory); - if( zRight[0] ){ - sqlite3_temp_directory = sqlite3_mprintf("%s", zRight); - }else{ - sqlite3_temp_directory = 0; - } -#endif /* SQLITE_OMIT_WSD */ - } - break; - } - -#if SQLITE_OS_WIN - /* - ** PRAGMA data_store_directory - ** PRAGMA data_store_directory = ""|"directory_name" - ** - ** Return or set the local value of the data_store_directory flag. Changing - ** the value sets a specific directory to be used for database files that - ** were specified with a relative pathname. Setting to a null string reverts - ** to the default database directory, which for database files specified with - ** a relative path will probably be based on the current directory for the - ** process. Database file specified with an absolute path are not impacted - ** by this setting, regardless of its value. - ** - */ - case PragTyp_DATA_STORE_DIRECTORY: { - if( !zRight ){ - returnSingleText(v, "data_store_directory", sqlite3_data_directory); - }else{ -#ifndef SQLITE_OMIT_WSD - if( zRight[0] ){ - int res; - rc = sqlite3OsAccess(db->pVfs, zRight, SQLITE_ACCESS_READWRITE, &res); - if( rc!=SQLITE_OK || res==0 ){ - sqlite3ErrorMsg(pParse, "not a writable directory"); - goto pragma_out; - } - } - sqlite3_free(sqlite3_data_directory); - if( zRight[0] ){ - sqlite3_data_directory = sqlite3_mprintf("%s", zRight); - }else{ - sqlite3_data_directory = 0; - } -#endif /* SQLITE_OMIT_WSD */ - } - break; - } -#endif - -#if SQLITE_ENABLE_LOCKING_STYLE - /* - ** PRAGMA [database.]lock_proxy_file - ** PRAGMA [database.]lock_proxy_file = ":auto:"|"lock_file_path" - ** - ** Return or set the value of the lock_proxy_file flag. Changing - ** the value sets a specific file to be used for database access locks. - ** - */ - case PragTyp_LOCK_PROXY_FILE: { - if( !zRight ){ - Pager *pPager = sqlite3BtreePager(pDb->pBt); - char *proxy_file_path = NULL; - sqlite3_file *pFile = sqlite3PagerFile(pPager); - sqlite3OsFileControlHint(pFile, SQLITE_GET_LOCKPROXYFILE, - &proxy_file_path); - returnSingleText(v, "lock_proxy_file", proxy_file_path); - }else{ - Pager *pPager = sqlite3BtreePager(pDb->pBt); - sqlite3_file *pFile = sqlite3PagerFile(pPager); - int res; - if( zRight[0] ){ - res=sqlite3OsFileControl(pFile, SQLITE_SET_LOCKPROXYFILE, - zRight); - } else { - res=sqlite3OsFileControl(pFile, SQLITE_SET_LOCKPROXYFILE, - NULL); - } - if( res!=SQLITE_OK ){ - sqlite3ErrorMsg(pParse, "failed to set lock proxy file"); - goto pragma_out; - } - } - break; - } -#endif /* SQLITE_ENABLE_LOCKING_STYLE */ - - /* - ** PRAGMA [database.]synchronous - ** PRAGMA [database.]synchronous=OFF|ON|NORMAL|FULL - ** - ** Return or set the local value of the synchronous flag. Changing - ** the local value does not make changes to the disk file and the - ** default value will be restored the next time the database is - ** opened. - */ - case PragTyp_SYNCHRONOUS: { - if( !zRight ){ - returnSingleInt(v, "synchronous", pDb->safety_level-1); - }else{ - if( !db->autoCommit ){ - sqlite3ErrorMsg(pParse, - "Safety level may not be changed inside a transaction"); - }else{ - int iLevel = (getSafetyLevel(zRight,0,1)+1) & PAGER_SYNCHRONOUS_MASK; - if( iLevel==0 ) iLevel = 1; - pDb->safety_level = iLevel; - setAllPagerFlags(db); - } - } - break; - } -#endif /* SQLITE_OMIT_PAGER_PRAGMAS */ - -#ifndef SQLITE_OMIT_FLAG_PRAGMAS - case PragTyp_FLAG: { - if( zRight==0 ){ - returnSingleInt(v, pPragma->zName, (db->flags & pPragma->iArg)!=0 ); - }else{ - int mask = pPragma->iArg; /* Mask of bits to set or clear. */ - if( db->autoCommit==0 ){ - /* Foreign key support may not be enabled or disabled while not - ** in auto-commit mode. */ - mask &= ~(SQLITE_ForeignKeys); - } -#if SQLITE_USER_AUTHENTICATION - if( db->auth.authLevel==UAUTH_User ){ - /* Do not allow non-admin users to modify the schema arbitrarily */ - mask &= ~(SQLITE_WriteSchema); - } -#endif - - if( sqlite3GetBoolean(zRight, 0) ){ - db->flags |= mask; - }else{ - db->flags &= ~mask; - if( mask==SQLITE_DeferFKs ) db->nDeferredImmCons = 0; - } - - /* Many of the flag-pragmas modify the code generated by the SQL - ** compiler (eg. count_changes). So add an opcode to expire all - ** compiled SQL statements after modifying a pragma value. - */ - sqlite3VdbeAddOp2(v, OP_Expire, 0, 0); - setAllPagerFlags(db); - } - break; - } -#endif /* SQLITE_OMIT_FLAG_PRAGMAS */ - -#ifndef SQLITE_OMIT_SCHEMA_PRAGMAS - /* - ** PRAGMA table_info(<table>) - ** - ** Return a single row for each column of the named table. The columns of - ** the returned data set are: - ** - ** cid: Column id (numbered from left to right, starting at 0) - ** name: Column name - ** type: Column declaration type. - ** notnull: True if 'NOT NULL' is part of column declaration - ** dflt_value: The default value for the column, if any. - */ - case PragTyp_TABLE_INFO: if( zRight ){ - Table *pTab; - pTab = sqlite3FindTable(db, zRight, zDb); - if( pTab ){ - static const char *azCol[] = { - "cid", "name", "type", "notnull", "dflt_value", "pk" - }; - int i, k; - int nHidden = 0; - Column *pCol; - Index *pPk = sqlite3PrimaryKeyIndex(pTab); - pParse->nMem = 6; - sqlite3CodeVerifySchema(pParse, iDb); - setAllColumnNames(v, 6, azCol); assert( 6==ArraySize(azCol) ); - sqlite3ViewGetColumnNames(pParse, pTab); - for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){ - if( IsHiddenColumn(pCol) ){ - nHidden++; - continue; - } - if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){ - k = 0; - }else if( pPk==0 ){ - k = 1; - }else{ - for(k=1; k<=pTab->nCol && pPk->aiColumn[k-1]!=i; k++){} - } - sqlite3VdbeMultiLoad(v, 1, "issisi", - i-nHidden, - pCol->zName, - pCol->zType ? pCol->zType : "", - pCol->notNull ? 1 : 0, - pCol->zDflt, - k); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6); - } - } - } - break; - - case PragTyp_STATS: { - static const char *azCol[] = { "table", "index", "width", "height" }; - Index *pIdx; - HashElem *i; - v = sqlite3GetVdbe(pParse); - pParse->nMem = 4; - sqlite3CodeVerifySchema(pParse, iDb); - setAllColumnNames(v, 4, azCol); assert( 4==ArraySize(azCol) ); - for(i=sqliteHashFirst(&pDb->pSchema->tblHash); i; i=sqliteHashNext(i)){ - Table *pTab = sqliteHashData(i); - sqlite3VdbeMultiLoad(v, 1, "ssii", - pTab->zName, - 0, - (int)sqlite3LogEstToInt(pTab->szTabRow), - (int)sqlite3LogEstToInt(pTab->nRowLogEst)); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 4); - for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){ - sqlite3VdbeMultiLoad(v, 2, "sii", - pIdx->zName, - (int)sqlite3LogEstToInt(pIdx->szIdxRow), - (int)sqlite3LogEstToInt(pIdx->aiRowLogEst[0])); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 4); - } - } - } - break; - - case PragTyp_INDEX_INFO: if( zRight ){ - Index *pIdx; - Table *pTab; - pIdx = sqlite3FindIndex(db, zRight, zDb); - if( pIdx ){ - static const char *azCol[] = { - "seqno", "cid", "name", "desc", "coll", "key" - }; - int i; - int mx; - if( pPragma->iArg ){ - /* PRAGMA index_xinfo (newer version with more rows and columns) */ - mx = pIdx->nColumn; - pParse->nMem = 6; - }else{ - /* PRAGMA index_info (legacy version) */ - mx = pIdx->nKeyCol; - pParse->nMem = 3; - } - pTab = pIdx->pTable; - sqlite3CodeVerifySchema(pParse, iDb); - assert( pParse->nMem<=ArraySize(azCol) ); - setAllColumnNames(v, pParse->nMem, azCol); - for(i=0; i<mx; i++){ - i16 cnum = pIdx->aiColumn[i]; - sqlite3VdbeMultiLoad(v, 1, "iis", i, cnum, - cnum<0 ? 0 : pTab->aCol[cnum].zName); - if( pPragma->iArg ){ - sqlite3VdbeMultiLoad(v, 4, "isi", - pIdx->aSortOrder[i], - pIdx->azColl[i], - i<pIdx->nKeyCol); - } - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, pParse->nMem); - } - } - } - break; - - case PragTyp_INDEX_LIST: if( zRight ){ - Index *pIdx; - Table *pTab; - int i; - pTab = sqlite3FindTable(db, zRight, zDb); - if( pTab ){ - static const char *azCol[] = { - "seq", "name", "unique", "origin", "partial" - }; - v = sqlite3GetVdbe(pParse); - pParse->nMem = 5; - sqlite3CodeVerifySchema(pParse, iDb); - setAllColumnNames(v, 5, azCol); assert( 5==ArraySize(azCol) ); - for(pIdx=pTab->pIndex, i=0; pIdx; pIdx=pIdx->pNext, i++){ - const char *azOrigin[] = { "c", "u", "pk" }; - sqlite3VdbeMultiLoad(v, 1, "isisi", - i, - pIdx->zName, - IsUniqueIndex(pIdx), - azOrigin[pIdx->idxType], - pIdx->pPartIdxWhere!=0); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5); - } - } - } - break; - - case PragTyp_DATABASE_LIST: { - static const char *azCol[] = { "seq", "name", "file" }; - int i; - pParse->nMem = 3; - setAllColumnNames(v, 3, azCol); assert( 3==ArraySize(azCol) ); - for(i=0; i<db->nDb; i++){ - if( db->aDb[i].pBt==0 ) continue; - assert( db->aDb[i].zName!=0 ); - sqlite3VdbeMultiLoad(v, 1, "iss", - i, - db->aDb[i].zName, - sqlite3BtreeGetFilename(db->aDb[i].pBt)); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3); - } - } - break; - - case PragTyp_COLLATION_LIST: { - static const char *azCol[] = { "seq", "name" }; - int i = 0; - HashElem *p; - pParse->nMem = 2; - setAllColumnNames(v, 2, azCol); assert( 2==ArraySize(azCol) ); - for(p=sqliteHashFirst(&db->aCollSeq); p; p=sqliteHashNext(p)){ - CollSeq *pColl = (CollSeq *)sqliteHashData(p); - sqlite3VdbeMultiLoad(v, 1, "is", i++, pColl->zName); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2); - } - } - break; -#endif /* SQLITE_OMIT_SCHEMA_PRAGMAS */ - -#ifndef SQLITE_OMIT_FOREIGN_KEY - case PragTyp_FOREIGN_KEY_LIST: if( zRight ){ - FKey *pFK; - Table *pTab; - pTab = sqlite3FindTable(db, zRight, zDb); - if( pTab ){ - v = sqlite3GetVdbe(pParse); - pFK = pTab->pFKey; - if( pFK ){ - static const char *azCol[] = { - "id", "seq", "table", "from", "to", "on_update", "on_delete", - "match" - }; - int i = 0; - pParse->nMem = 8; - sqlite3CodeVerifySchema(pParse, iDb); - setAllColumnNames(v, 8, azCol); assert( 8==ArraySize(azCol) ); - while(pFK){ - int j; - for(j=0; j<pFK->nCol; j++){ - sqlite3VdbeMultiLoad(v, 1, "iissssss", - i, - j, - pFK->zTo, - pTab->aCol[pFK->aCol[j].iFrom].zName, - pFK->aCol[j].zCol, - actionName(pFK->aAction[1]), /* ON UPDATE */ - actionName(pFK->aAction[0]), /* ON DELETE */ - "NONE"); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 8); - } - ++i; - pFK = pFK->pNextFrom; - } - } - } - } - break; -#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */ - -#ifndef SQLITE_OMIT_FOREIGN_KEY -#ifndef SQLITE_OMIT_TRIGGER - case PragTyp_FOREIGN_KEY_CHECK: { - FKey *pFK; /* A foreign key constraint */ - Table *pTab; /* Child table contain "REFERENCES" keyword */ - Table *pParent; /* Parent table that child points to */ - Index *pIdx; /* Index in the parent table */ - int i; /* Loop counter: Foreign key number for pTab */ - int j; /* Loop counter: Field of the foreign key */ - HashElem *k; /* Loop counter: Next table in schema */ - int x; /* result variable */ - int regResult; /* 3 registers to hold a result row */ - int regKey; /* Register to hold key for checking the FK */ - int regRow; /* Registers to hold a row from pTab */ - int addrTop; /* Top of a loop checking foreign keys */ - int addrOk; /* Jump here if the key is OK */ - int *aiCols; /* child to parent column mapping */ - static const char *azCol[] = { "table", "rowid", "parent", "fkid" }; - - regResult = pParse->nMem+1; - pParse->nMem += 4; - regKey = ++pParse->nMem; - regRow = ++pParse->nMem; - v = sqlite3GetVdbe(pParse); - setAllColumnNames(v, 4, azCol); assert( 4==ArraySize(azCol) ); - sqlite3CodeVerifySchema(pParse, iDb); - k = sqliteHashFirst(&db->aDb[iDb].pSchema->tblHash); - while( k ){ - if( zRight ){ - pTab = sqlite3LocateTable(pParse, 0, zRight, zDb); - k = 0; - }else{ - pTab = (Table*)sqliteHashData(k); - k = sqliteHashNext(k); - } - if( pTab==0 || pTab->pFKey==0 ) continue; - sqlite3TableLock(pParse, iDb, pTab->tnum, 0, pTab->zName); - if( pTab->nCol+regRow>pParse->nMem ) pParse->nMem = pTab->nCol + regRow; - sqlite3OpenTable(pParse, 0, iDb, pTab, OP_OpenRead); - sqlite3VdbeLoadString(v, regResult, pTab->zName); - for(i=1, pFK=pTab->pFKey; pFK; i++, pFK=pFK->pNextFrom){ - pParent = sqlite3FindTable(db, pFK->zTo, zDb); - if( pParent==0 ) continue; - pIdx = 0; - sqlite3TableLock(pParse, iDb, pParent->tnum, 0, pParent->zName); - x = sqlite3FkLocateIndex(pParse, pParent, pFK, &pIdx, 0); - if( x==0 ){ - if( pIdx==0 ){ - sqlite3OpenTable(pParse, i, iDb, pParent, OP_OpenRead); - }else{ - sqlite3VdbeAddOp3(v, OP_OpenRead, i, pIdx->tnum, iDb); - sqlite3VdbeSetP4KeyInfo(pParse, pIdx); - } - }else{ - k = 0; - break; - } - } - assert( pParse->nErr>0 || pFK==0 ); - if( pFK ) break; - if( pParse->nTab<i ) pParse->nTab = i; - addrTop = sqlite3VdbeAddOp1(v, OP_Rewind, 0); VdbeCoverage(v); - for(i=1, pFK=pTab->pFKey; pFK; i++, pFK=pFK->pNextFrom){ - pParent = sqlite3FindTable(db, pFK->zTo, zDb); - pIdx = 0; - aiCols = 0; - if( pParent ){ - x = sqlite3FkLocateIndex(pParse, pParent, pFK, &pIdx, &aiCols); - assert( x==0 ); - } - addrOk = sqlite3VdbeMakeLabel(v); - if( pParent && pIdx==0 ){ - int iKey = pFK->aCol[0].iFrom; - assert( iKey>=0 && iKey<pTab->nCol ); - if( iKey!=pTab->iPKey ){ - sqlite3VdbeAddOp3(v, OP_Column, 0, iKey, regRow); - sqlite3ColumnDefault(v, pTab, iKey, regRow); - sqlite3VdbeAddOp2(v, OP_IsNull, regRow, addrOk); VdbeCoverage(v); - sqlite3VdbeAddOp2(v, OP_MustBeInt, regRow, - sqlite3VdbeCurrentAddr(v)+3); VdbeCoverage(v); - }else{ - sqlite3VdbeAddOp2(v, OP_Rowid, 0, regRow); - } - sqlite3VdbeAddOp3(v, OP_NotExists, i, 0, regRow); VdbeCoverage(v); - sqlite3VdbeGoto(v, addrOk); - sqlite3VdbeJumpHere(v, sqlite3VdbeCurrentAddr(v)-2); - }else{ - for(j=0; j<pFK->nCol; j++){ - sqlite3ExprCodeGetColumnOfTable(v, pTab, 0, - aiCols ? aiCols[j] : pFK->aCol[j].iFrom, regRow+j); - sqlite3VdbeAddOp2(v, OP_IsNull, regRow+j, addrOk); VdbeCoverage(v); - } - if( pParent ){ - sqlite3VdbeAddOp4(v, OP_MakeRecord, regRow, pFK->nCol, regKey, - sqlite3IndexAffinityStr(db,pIdx), pFK->nCol); - sqlite3VdbeAddOp4Int(v, OP_Found, i, addrOk, regKey, 0); - VdbeCoverage(v); - } - } - sqlite3VdbeAddOp2(v, OP_Rowid, 0, regResult+1); - sqlite3VdbeMultiLoad(v, regResult+2, "si", pFK->zTo, i-1); - sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, 4); - sqlite3VdbeResolveLabel(v, addrOk); - sqlite3DbFree(db, aiCols); - } - sqlite3VdbeAddOp2(v, OP_Next, 0, addrTop+1); VdbeCoverage(v); - sqlite3VdbeJumpHere(v, addrTop); - } - } - break; -#endif /* !defined(SQLITE_OMIT_TRIGGER) */ -#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */ - -#ifndef NDEBUG - case PragTyp_PARSER_TRACE: { - if( zRight ){ - if( sqlite3GetBoolean(zRight, 0) ){ - sqlite3ParserTrace(stderr, "parser: "); - }else{ - sqlite3ParserTrace(0, 0); - } - } - } - break; -#endif - - /* Reinstall the LIKE and GLOB functions. The variant of LIKE - ** used will be case sensitive or not depending on the RHS. - */ - case PragTyp_CASE_SENSITIVE_LIKE: { - if( zRight ){ - sqlite3RegisterLikeFunctions(db, sqlite3GetBoolean(zRight, 0)); - } - } - break; - -#ifndef SQLITE_INTEGRITY_CHECK_ERROR_MAX -# define SQLITE_INTEGRITY_CHECK_ERROR_MAX 100 -#endif - -#ifndef SQLITE_OMIT_INTEGRITY_CHECK - /* Pragma "quick_check" is reduced version of - ** integrity_check designed to detect most database corruption - ** without most of the overhead of a full integrity-check. - */ - case PragTyp_INTEGRITY_CHECK: { - int i, j, addr, mxErr; - - /* Code that appears at the end of the integrity check. If no error - ** messages have been generated, output OK. Otherwise output the - ** error message - */ - static const int iLn = VDBE_OFFSET_LINENO(2); - static const VdbeOpList endCode[] = { - { OP_AddImm, 1, 0, 0}, /* 0 */ - { OP_If, 1, 0, 0}, /* 1 */ - { OP_String8, 0, 3, 0}, /* 2 */ - { OP_ResultRow, 3, 1, 0}, - }; - - int isQuick = (sqlite3Tolower(zLeft[0])=='q'); - - /* If the PRAGMA command was of the form "PRAGMA <db>.integrity_check", - ** then iDb is set to the index of the database identified by <db>. - ** In this case, the integrity of database iDb only is verified by - ** the VDBE created below. - ** - ** Otherwise, if the command was simply "PRAGMA integrity_check" (or - ** "PRAGMA quick_check"), then iDb is set to 0. In this case, set iDb - ** to -1 here, to indicate that the VDBE should verify the integrity - ** of all attached databases. */ - assert( iDb>=0 ); - assert( iDb==0 || pId2->z ); - if( pId2->z==0 ) iDb = -1; - - /* Initialize the VDBE program */ - pParse->nMem = 6; - setOneColumnName(v, "integrity_check"); - - /* Set the maximum error count */ - mxErr = SQLITE_INTEGRITY_CHECK_ERROR_MAX; - if( zRight ){ - sqlite3GetInt32(zRight, &mxErr); - if( mxErr<=0 ){ - mxErr = SQLITE_INTEGRITY_CHECK_ERROR_MAX; - } - } - sqlite3VdbeAddOp2(v, OP_Integer, mxErr, 1); /* reg[1] holds errors left */ - - /* Do an integrity check on each database file */ - for(i=0; i<db->nDb; i++){ - HashElem *x; - Hash *pTbls; - int cnt = 0; - - if( OMIT_TEMPDB && i==1 ) continue; - if( iDb>=0 && i!=iDb ) continue; - - sqlite3CodeVerifySchema(pParse, i); - addr = sqlite3VdbeAddOp1(v, OP_IfPos, 1); /* Halt if out of errors */ - VdbeCoverage(v); - sqlite3VdbeAddOp2(v, OP_Halt, 0, 0); - sqlite3VdbeJumpHere(v, addr); - - /* Do an integrity check of the B-Tree - ** - ** Begin by filling registers 2, 3, ... with the root pages numbers - ** for all tables and indices in the database. - */ - assert( sqlite3SchemaMutexHeld(db, i, 0) ); - pTbls = &db->aDb[i].pSchema->tblHash; - for(x=sqliteHashFirst(pTbls); x; x=sqliteHashNext(x)){ - Table *pTab = sqliteHashData(x); - Index *pIdx; - if( HasRowid(pTab) ){ - sqlite3VdbeAddOp2(v, OP_Integer, pTab->tnum, 2+cnt); - VdbeComment((v, "%s", pTab->zName)); - cnt++; - } - for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){ - sqlite3VdbeAddOp2(v, OP_Integer, pIdx->tnum, 2+cnt); - VdbeComment((v, "%s", pIdx->zName)); - cnt++; - } - } - - /* Make sure sufficient number of registers have been allocated */ - pParse->nMem = MAX( pParse->nMem, cnt+8 ); - - /* Do the b-tree integrity checks */ - sqlite3VdbeAddOp3(v, OP_IntegrityCk, 2, cnt, 1); - sqlite3VdbeChangeP5(v, (u8)i); - addr = sqlite3VdbeAddOp1(v, OP_IsNull, 2); VdbeCoverage(v); - sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0, - sqlite3MPrintf(db, "*** in database %s ***\n", db->aDb[i].zName), - P4_DYNAMIC); - sqlite3VdbeAddOp3(v, OP_Move, 2, 4, 1); - sqlite3VdbeAddOp3(v, OP_Concat, 4, 3, 2); - sqlite3VdbeAddOp2(v, OP_ResultRow, 2, 1); - sqlite3VdbeJumpHere(v, addr); - - /* Make sure all the indices are constructed correctly. - */ - for(x=sqliteHashFirst(pTbls); x && !isQuick; x=sqliteHashNext(x)){ - Table *pTab = sqliteHashData(x); - Index *pIdx, *pPk; - Index *pPrior = 0; - int loopTop; - int iDataCur, iIdxCur; - int r1 = -1; - - if( pTab->pIndex==0 ) continue; - pPk = HasRowid(pTab) ? 0 : sqlite3PrimaryKeyIndex(pTab); - addr = sqlite3VdbeAddOp1(v, OP_IfPos, 1); /* Stop if out of errors */ - VdbeCoverage(v); - sqlite3VdbeAddOp2(v, OP_Halt, 0, 0); - sqlite3VdbeJumpHere(v, addr); - sqlite3ExprCacheClear(pParse); - sqlite3OpenTableAndIndices(pParse, pTab, OP_OpenRead, - 1, 0, &iDataCur, &iIdxCur); - sqlite3VdbeAddOp2(v, OP_Integer, 0, 7); - for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){ - sqlite3VdbeAddOp2(v, OP_Integer, 0, 8+j); /* index entries counter */ - } - pParse->nMem = MAX(pParse->nMem, 8+j); - sqlite3VdbeAddOp2(v, OP_Rewind, iDataCur, 0); VdbeCoverage(v); - loopTop = sqlite3VdbeAddOp2(v, OP_AddImm, 7, 1); - /* Verify that all NOT NULL columns really are NOT NULL */ - for(j=0; j<pTab->nCol; j++){ - char *zErr; - int jmp2, jmp3; - if( j==pTab->iPKey ) continue; - if( pTab->aCol[j].notNull==0 ) continue; - sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, j, 3); - sqlite3VdbeChangeP5(v, OPFLAG_TYPEOFARG); - jmp2 = sqlite3VdbeAddOp1(v, OP_NotNull, 3); VdbeCoverage(v); - sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1); /* Decrement error limit */ - zErr = sqlite3MPrintf(db, "NULL value in %s.%s", pTab->zName, - pTab->aCol[j].zName); - sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0, zErr, P4_DYNAMIC); - sqlite3VdbeAddOp2(v, OP_ResultRow, 3, 1); - jmp3 = sqlite3VdbeAddOp1(v, OP_IfPos, 1); VdbeCoverage(v); - sqlite3VdbeAddOp0(v, OP_Halt); - sqlite3VdbeJumpHere(v, jmp2); - sqlite3VdbeJumpHere(v, jmp3); - } - /* Validate index entries for the current row */ - for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){ - int jmp2, jmp3, jmp4, jmp5; - int ckUniq = sqlite3VdbeMakeLabel(v); - if( pPk==pIdx ) continue; - r1 = sqlite3GenerateIndexKey(pParse, pIdx, iDataCur, 0, 0, &jmp3, - pPrior, r1); - pPrior = pIdx; - sqlite3VdbeAddOp2(v, OP_AddImm, 8+j, 1); /* increment entry count */ - /* Verify that an index entry exists for the current table row */ - jmp2 = sqlite3VdbeAddOp4Int(v, OP_Found, iIdxCur+j, ckUniq, r1, - pIdx->nColumn); VdbeCoverage(v); - sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1); /* Decrement error limit */ - sqlite3VdbeLoadString(v, 3, "row "); - sqlite3VdbeAddOp3(v, OP_Concat, 7, 3, 3); - sqlite3VdbeLoadString(v, 4, " missing from index "); - sqlite3VdbeAddOp3(v, OP_Concat, 4, 3, 3); - jmp5 = sqlite3VdbeLoadString(v, 4, pIdx->zName); - sqlite3VdbeAddOp3(v, OP_Concat, 4, 3, 3); - sqlite3VdbeAddOp2(v, OP_ResultRow, 3, 1); - jmp4 = sqlite3VdbeAddOp1(v, OP_IfPos, 1); VdbeCoverage(v); - sqlite3VdbeAddOp0(v, OP_Halt); - sqlite3VdbeJumpHere(v, jmp2); - /* For UNIQUE indexes, verify that only one entry exists with the - ** current key. The entry is unique if (1) any column is NULL - ** or (2) the next entry has a different key */ - if( IsUniqueIndex(pIdx) ){ - int uniqOk = sqlite3VdbeMakeLabel(v); - int jmp6; - int kk; - for(kk=0; kk<pIdx->nKeyCol; kk++){ - int iCol = pIdx->aiColumn[kk]; - assert( iCol!=XN_ROWID && iCol<pTab->nCol ); - if( iCol>=0 && pTab->aCol[iCol].notNull ) continue; - sqlite3VdbeAddOp2(v, OP_IsNull, r1+kk, uniqOk); - VdbeCoverage(v); - } - jmp6 = sqlite3VdbeAddOp1(v, OP_Next, iIdxCur+j); VdbeCoverage(v); - sqlite3VdbeGoto(v, uniqOk); - sqlite3VdbeJumpHere(v, jmp6); - sqlite3VdbeAddOp4Int(v, OP_IdxGT, iIdxCur+j, uniqOk, r1, - pIdx->nKeyCol); VdbeCoverage(v); - sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1); /* Decrement error limit */ - sqlite3VdbeLoadString(v, 3, "non-unique entry in index "); - sqlite3VdbeGoto(v, jmp5); - sqlite3VdbeResolveLabel(v, uniqOk); - } - sqlite3VdbeJumpHere(v, jmp4); - sqlite3ResolvePartIdxLabel(pParse, jmp3); - } - sqlite3VdbeAddOp2(v, OP_Next, iDataCur, loopTop); VdbeCoverage(v); - sqlite3VdbeJumpHere(v, loopTop-1); -#ifndef SQLITE_OMIT_BTREECOUNT - sqlite3VdbeLoadString(v, 2, "wrong # of entries in index "); - for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){ - if( pPk==pIdx ) continue; - addr = sqlite3VdbeCurrentAddr(v); - sqlite3VdbeAddOp2(v, OP_IfPos, 1, addr+2); VdbeCoverage(v); - sqlite3VdbeAddOp2(v, OP_Halt, 0, 0); - sqlite3VdbeAddOp2(v, OP_Count, iIdxCur+j, 3); - sqlite3VdbeAddOp3(v, OP_Eq, 8+j, addr+8, 3); VdbeCoverage(v); - sqlite3VdbeChangeP5(v, SQLITE_NOTNULL); - sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1); - sqlite3VdbeLoadString(v, 3, pIdx->zName); - sqlite3VdbeAddOp3(v, OP_Concat, 3, 2, 7); - sqlite3VdbeAddOp2(v, OP_ResultRow, 7, 1); - } -#endif /* SQLITE_OMIT_BTREECOUNT */ - } - } - addr = sqlite3VdbeAddOpList(v, ArraySize(endCode), endCode, iLn); - sqlite3VdbeChangeP2(v, addr, -mxErr); - sqlite3VdbeJumpHere(v, addr+1); - sqlite3VdbeChangeP4(v, addr+2, "ok", P4_STATIC); - } - break; -#endif /* SQLITE_OMIT_INTEGRITY_CHECK */ - -#ifndef SQLITE_OMIT_UTF16 - /* - ** PRAGMA encoding - ** PRAGMA encoding = "utf-8"|"utf-16"|"utf-16le"|"utf-16be" - ** - ** In its first form, this pragma returns the encoding of the main - ** database. If the database is not initialized, it is initialized now. - ** - ** The second form of this pragma is a no-op if the main database file - ** has not already been initialized. In this case it sets the default - ** encoding that will be used for the main database file if a new file - ** is created. If an existing main database file is opened, then the - ** default text encoding for the existing database is used. - ** - ** In all cases new databases created using the ATTACH command are - ** created to use the same default text encoding as the main database. If - ** the main database has not been initialized and/or created when ATTACH - ** is executed, this is done before the ATTACH operation. - ** - ** In the second form this pragma sets the text encoding to be used in - ** new database files created using this database handle. It is only - ** useful if invoked immediately after the main database i - */ - case PragTyp_ENCODING: { - static const struct EncName { - char *zName; - u8 enc; - } encnames[] = { - { "UTF8", SQLITE_UTF8 }, - { "UTF-8", SQLITE_UTF8 }, /* Must be element [1] */ - { "UTF-16le", SQLITE_UTF16LE }, /* Must be element [2] */ - { "UTF-16be", SQLITE_UTF16BE }, /* Must be element [3] */ - { "UTF16le", SQLITE_UTF16LE }, - { "UTF16be", SQLITE_UTF16BE }, - { "UTF-16", 0 }, /* SQLITE_UTF16NATIVE */ - { "UTF16", 0 }, /* SQLITE_UTF16NATIVE */ - { 0, 0 } - }; - const struct EncName *pEnc; - if( !zRight ){ /* "PRAGMA encoding" */ - if( sqlite3ReadSchema(pParse) ) goto pragma_out; - assert( encnames[SQLITE_UTF8].enc==SQLITE_UTF8 ); - assert( encnames[SQLITE_UTF16LE].enc==SQLITE_UTF16LE ); - assert( encnames[SQLITE_UTF16BE].enc==SQLITE_UTF16BE ); - returnSingleText(v, "encoding", encnames[ENC(pParse->db)].zName); - }else{ /* "PRAGMA encoding = XXX" */ - /* Only change the value of sqlite.enc if the database handle is not - ** initialized. If the main database exists, the new sqlite.enc value - ** will be overwritten when the schema is next loaded. If it does not - ** already exists, it will be created to use the new encoding value. - */ - if( - !(DbHasProperty(db, 0, DB_SchemaLoaded)) || - DbHasProperty(db, 0, DB_Empty) - ){ - for(pEnc=&encnames[0]; pEnc->zName; pEnc++){ - if( 0==sqlite3StrICmp(zRight, pEnc->zName) ){ - SCHEMA_ENC(db) = ENC(db) = - pEnc->enc ? pEnc->enc : SQLITE_UTF16NATIVE; - break; - } - } - if( !pEnc->zName ){ - sqlite3ErrorMsg(pParse, "unsupported encoding: %s", zRight); - } - } - } - } - break; -#endif /* SQLITE_OMIT_UTF16 */ - -#ifndef SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS - /* - ** PRAGMA [database.]schema_version - ** PRAGMA [database.]schema_version = <integer> - ** - ** PRAGMA [database.]user_version - ** PRAGMA [database.]user_version = <integer> - ** - ** PRAGMA [database.]freelist_count = <integer> - ** - ** PRAGMA [database.]application_id - ** PRAGMA [database.]application_id = <integer> - ** - ** The pragma's schema_version and user_version are used to set or get - ** the value of the schema-version and user-version, respectively. Both - ** the schema-version and the user-version are 32-bit signed integers - ** stored in the database header. - ** - ** The schema-cookie is usually only manipulated internally by SQLite. It - ** is incremented by SQLite whenever the database schema is modified (by - ** creating or dropping a table or index). The schema version is used by - ** SQLite each time a query is executed to ensure that the internal cache - ** of the schema used when compiling the SQL query matches the schema of - ** the database against which the compiled query is actually executed. - ** Subverting this mechanism by using "PRAGMA schema_version" to modify - ** the schema-version is potentially dangerous and may lead to program - ** crashes or database corruption. Use with caution! - ** - ** The user-version is not used internally by SQLite. It may be used by - ** applications for any purpose. - */ - case PragTyp_HEADER_VALUE: { - int iCookie = pPragma->iArg; /* Which cookie to read or write */ - sqlite3VdbeUsesBtree(v, iDb); - if( zRight && (pPragma->mPragFlag & PragFlag_ReadOnly)==0 ){ - /* Write the specified cookie value */ - static const VdbeOpList setCookie[] = { - { OP_Transaction, 0, 1, 0}, /* 0 */ - { OP_Integer, 0, 1, 0}, /* 1 */ - { OP_SetCookie, 0, 0, 1}, /* 2 */ - }; - int addr = sqlite3VdbeAddOpList(v, ArraySize(setCookie), setCookie, 0); - sqlite3VdbeChangeP1(v, addr, iDb); - sqlite3VdbeChangeP1(v, addr+1, sqlite3Atoi(zRight)); - sqlite3VdbeChangeP1(v, addr+2, iDb); - sqlite3VdbeChangeP2(v, addr+2, iCookie); - }else{ - /* Read the specified cookie value */ - static const VdbeOpList readCookie[] = { - { OP_Transaction, 0, 0, 0}, /* 0 */ - { OP_ReadCookie, 0, 1, 0}, /* 1 */ - { OP_ResultRow, 1, 1, 0} - }; - int addr = sqlite3VdbeAddOpList(v, ArraySize(readCookie), readCookie, 0); - sqlite3VdbeChangeP1(v, addr, iDb); - sqlite3VdbeChangeP1(v, addr+1, iDb); - sqlite3VdbeChangeP3(v, addr+1, iCookie); - sqlite3VdbeSetNumCols(v, 1); - sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, SQLITE_TRANSIENT); - } - } - break; -#endif /* SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS */ - -#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS - /* - ** PRAGMA compile_options - ** - ** Return the names of all compile-time options used in this build, - ** one option per row. - */ - case PragTyp_COMPILE_OPTIONS: { - int i = 0; - const char *zOpt; - pParse->nMem = 1; - setOneColumnName(v, "compile_option"); - while( (zOpt = sqlite3_compileoption_get(i++))!=0 ){ - sqlite3VdbeLoadString(v, 1, zOpt); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1); - } - } - break; -#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */ - -#ifndef SQLITE_OMIT_WAL - /* - ** PRAGMA [database.]wal_checkpoint = passive|full|restart|truncate - ** - ** Checkpoint the database. - */ - case PragTyp_WAL_CHECKPOINT: { - static const char *azCol[] = { "busy", "log", "checkpointed" }; - int iBt = (pId2->z?iDb:SQLITE_MAX_ATTACHED); - int eMode = SQLITE_CHECKPOINT_PASSIVE; - if( zRight ){ - if( sqlite3StrICmp(zRight, "full")==0 ){ - eMode = SQLITE_CHECKPOINT_FULL; - }else if( sqlite3StrICmp(zRight, "restart")==0 ){ - eMode = SQLITE_CHECKPOINT_RESTART; - }else if( sqlite3StrICmp(zRight, "truncate")==0 ){ - eMode = SQLITE_CHECKPOINT_TRUNCATE; - } - } - setAllColumnNames(v, 3, azCol); assert( 3==ArraySize(azCol) ); - pParse->nMem = 3; - sqlite3VdbeAddOp3(v, OP_Checkpoint, iBt, eMode, 1); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3); - } - break; - - /* - ** PRAGMA wal_autocheckpoint - ** PRAGMA wal_autocheckpoint = N - ** - ** Configure a database connection to automatically checkpoint a database - ** after accumulating N frames in the log. Or query for the current value - ** of N. - */ - case PragTyp_WAL_AUTOCHECKPOINT: { - if( zRight ){ - sqlite3_wal_autocheckpoint(db, sqlite3Atoi(zRight)); - } - returnSingleInt(v, "wal_autocheckpoint", - db->xWalCallback==sqlite3WalDefaultHook ? - SQLITE_PTR_TO_INT(db->pWalArg) : 0); - } - break; -#endif - - /* - ** PRAGMA shrink_memory - ** - ** IMPLEMENTATION-OF: R-23445-46109 This pragma causes the database - ** connection on which it is invoked to free up as much memory as it - ** can, by calling sqlite3_db_release_memory(). - */ - case PragTyp_SHRINK_MEMORY: { - sqlite3_db_release_memory(db); - break; - } - - /* - ** PRAGMA busy_timeout - ** PRAGMA busy_timeout = N - ** - ** Call sqlite3_busy_timeout(db, N). Return the current timeout value - ** if one is set. If no busy handler or a different busy handler is set - ** then 0 is returned. Setting the busy_timeout to 0 or negative - ** disables the timeout. - */ - /*case PragTyp_BUSY_TIMEOUT*/ default: { - assert( pPragma->ePragTyp==PragTyp_BUSY_TIMEOUT ); - if( zRight ){ - sqlite3_busy_timeout(db, sqlite3Atoi(zRight)); - } - returnSingleInt(v, "timeout", db->busyTimeout); - break; - } - - /* - ** PRAGMA soft_heap_limit - ** PRAGMA soft_heap_limit = N - ** - ** IMPLEMENTATION-OF: R-26343-45930 This pragma invokes the - ** sqlite3_soft_heap_limit64() interface with the argument N, if N is - ** specified and is a non-negative integer. - ** IMPLEMENTATION-OF: R-64451-07163 The soft_heap_limit pragma always - ** returns the same integer that would be returned by the - ** sqlite3_soft_heap_limit64(-1) C-language function. - */ - case PragTyp_SOFT_HEAP_LIMIT: { - sqlite3_int64 N; - if( zRight && sqlite3DecOrHexToI64(zRight, &N)==SQLITE_OK ){ - sqlite3_soft_heap_limit64(N); - } - returnSingleInt(v, "soft_heap_limit", sqlite3_soft_heap_limit64(-1)); - break; - } - - /* - ** PRAGMA threads - ** PRAGMA threads = N - ** - ** Configure the maximum number of worker threads. Return the new - ** maximum, which might be less than requested. - */ - case PragTyp_THREADS: { - sqlite3_int64 N; - if( zRight - && sqlite3DecOrHexToI64(zRight, &N)==SQLITE_OK - && N>=0 - ){ - sqlite3_limit(db, SQLITE_LIMIT_WORKER_THREADS, (int)(N&0x7fffffff)); - } - returnSingleInt(v, "threads", - sqlite3_limit(db, SQLITE_LIMIT_WORKER_THREADS, -1)); - break; - } - -#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST) - /* - ** Report the current state of file logs for all databases - */ - case PragTyp_LOCK_STATUS: { - static const char *const azLockName[] = { - "unlocked", "shared", "reserved", "pending", "exclusive" - }; - static const char *azCol[] = { "database", "status" }; - int i; - setAllColumnNames(v, 2, azCol); assert( 2==ArraySize(azCol) ); - pParse->nMem = 2; - for(i=0; i<db->nDb; i++){ - Btree *pBt; - const char *zState = "unknown"; - int j; - if( db->aDb[i].zName==0 ) continue; - pBt = db->aDb[i].pBt; - if( pBt==0 || sqlite3BtreePager(pBt)==0 ){ - zState = "closed"; - }else if( sqlite3_file_control(db, i ? db->aDb[i].zName : 0, - SQLITE_FCNTL_LOCKSTATE, &j)==SQLITE_OK ){ - zState = azLockName[j]; - } - sqlite3VdbeMultiLoad(v, 1, "ss", db->aDb[i].zName, zState); - sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2); - } - break; - } -#endif - -#ifdef SQLITE_HAS_CODEC - case PragTyp_KEY: { - if( zRight ) sqlite3_key_v2(db, zDb, zRight, sqlite3Strlen30(zRight)); - break; - } - case PragTyp_REKEY: { - if( zRight ) sqlite3_rekey_v2(db, zDb, zRight, sqlite3Strlen30(zRight)); - break; - } - case PragTyp_HEXKEY: { - if( zRight ){ - u8 iByte; - int i; - char zKey[40]; - for(i=0, iByte=0; i<sizeof(zKey)*2 && sqlite3Isxdigit(zRight[i]); i++){ - iByte = (iByte<<4) + sqlite3HexToInt(zRight[i]); - if( (i&1)!=0 ) zKey[i/2] = iByte; - } - if( (zLeft[3] & 0xf)==0xb ){ - sqlite3_key_v2(db, zDb, zKey, i/2); - }else{ - sqlite3_rekey_v2(db, zDb, zKey, i/2); - } - } - break; - } -#endif -#if defined(SQLITE_HAS_CODEC) || defined(SQLITE_ENABLE_CEROD) - case PragTyp_ACTIVATE_EXTENSIONS: if( zRight ){ -#ifdef SQLITE_HAS_CODEC - if( sqlite3StrNICmp(zRight, "see-", 4)==0 ){ - sqlite3_activate_see(&zRight[4]); - } -#endif -#ifdef SQLITE_ENABLE_CEROD - if( sqlite3StrNICmp(zRight, "cerod-", 6)==0 ){ - sqlite3_activate_cerod(&zRight[6]); - } -#endif - } - break; -#endif - - } /* End of the PRAGMA switch */ - -pragma_out: - sqlite3DbFree(db, zLeft); - sqlite3DbFree(db, zRight); -} - -#endif /* SQLITE_OMIT_PRAGMA */ |