/*
** Usage: btree_open FILENAME NCACHE
**
** Open a new database
*/
static int btree_open(
void *NotUsed,
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int argc, /* Number of arguments */
const char **argv /* Text of each argument */
){
Btree *pBt;
int rc, nCache;
char zBuf[100];
if( argc!=3 ){
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" FILENAME NCACHE FLAGS\"", 0);
return TCL_ERROR;
}
if( Tcl_GetInt(interp, argv[2], &nCache) ) return TCL_ERROR;
nRefSqlite3++;
if( nRefSqlite3==1 ){
sDb.pVfs = sqlite3_vfs_find(0);
sDb.mutex = sqlite3MutexAlloc(SQLITE_MUTEX_RECURSIVE);
sqlite3_mutex_enter(sDb.mutex);
}
rc = sqlite3BtreeOpen(sDb.pVfs, argv[1], &sDb, &pBt, 0,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_MAIN_DB);
if( rc!=SQLITE_OK ){
Tcl_AppendResult(interp, errorName(rc), 0);
return TCL_ERROR;
}
sqlite3BtreeSetCacheSize(pBt, nCache);
sqlite3_snprintf(sizeof(zBuf), zBuf,"%p", pBt);
Tcl_AppendResult(interp, zBuf, 0);
return TCL_OK;
}
/*
** This routine is called to create a connection to a database BTree
** driver. If zFilename is the name of a file, then that file is
** opened and used. If zFilename is the magic name ":memory:" then
** the database is stored in memory (and is thus forgotten as soon as
** the connection is closed.) If zFilename is NULL then the database
** is a "virtual" database for transient use only and is deleted as
** soon as the connection is closed.
**
** A virtual database can be either a disk file (that is automatically
** deleted when the file is closed) or it an be held entirely in memory,
** depending on the values of the TEMP_STORE compile-time macro and the
** db->temp_store variable, according to the following chart:
**
** TEMP_STORE db->temp_store Location of temporary database
** ---------- -------------- ------------------------------
** 0 any file
** 1 1 file
** 1 2 memory
** 1 0 file
** 2 1 file
** 2 2 memory
** 2 0 memory
** 3 any memory
*/
int sqlite3BtreeFactory(
const sqlite3 *db, /* Main database when opening aux otherwise 0 */
const char *zFilename, /* Name of the file containing the BTree database */
int omitJournal, /* if TRUE then do not journal this file */
int nCache, /* How many pages in the page cache */
int vfsFlags, /* Flags passed through to vfsOpen */
Btree **ppBtree /* Pointer to new Btree object written here */
){
int btFlags = 0;
int rc;
assert( sqlite3_mutex_held(db->mutex) );
assert( ppBtree != 0);
if( omitJournal ){
btFlags |= BTREE_OMIT_JOURNAL;
}
if( db->flags & SQLITE_NoReadlock ){
btFlags |= BTREE_NO_READLOCK;
}
if( zFilename==0 ){
#if TEMP_STORE==0
/* Do nothing */
#endif
#ifndef SQLITE_OMIT_MEMORYDB
#if TEMP_STORE==1
if( db->temp_store==2 ) zFilename = ":memory:";
#endif
#if TEMP_STORE==2
if( db->temp_store!=1 ) zFilename = ":memory:";
#endif
#if TEMP_STORE==3
zFilename = ":memory:";
#endif
#endif /* SQLITE_OMIT_MEMORYDB */
}
if( (vfsFlags & SQLITE_OPEN_MAIN_DB)!=0 && (zFilename==0 || *zFilename==0) ){
vfsFlags = (vfsFlags & ~SQLITE_OPEN_MAIN_DB) | SQLITE_OPEN_TEMP_DB;
}
rc = sqlite3BtreeOpen(zFilename, (sqlite3 *)db, ppBtree, btFlags, vfsFlags);
if( rc==SQLITE_OK ){
sqlite3BtreeSetCacheSize(*ppBtree, nCache);
}
return rc;
}
/*
** This routine is called to create a connection to a database BTree
** driver. If zFilename is the name of a file, then that file is
** opened and used. If zFilename is the magic name ":memory:" then
** the database is stored in memory (and is thus forgotten as soon as
** the connection is closed.) If zFilename is NULL then the database
** is a "virtual" database for transient use only and is deleted as
** soon as the connection is closed.
**
** A virtual database can be either a disk file (that is automatically
** deleted when the file is closed) or it an be held entirely in memory,
** depending on the values of the TEMP_STORE compile-time macro and the
** db->temp_store variable, according to the following chart:
**
** TEMP_STORE db->temp_store Location of temporary database
** ---------- -------------- ------------------------------
** 0 any file
** 1 1 file
** 1 2 memory
** 1 0 file
** 2 1 file
** 2 2 memory
** 2 0 memory
** 3 any memory
*/
int sqlite3BtreeFactory(
const sqlite3 *db, /* Main database when opening aux otherwise 0 */
const char *zFilename, /* Name of the file containing the BTree database */
int omitJournal, /* if TRUE then do not journal this file */
int nCache, /* How many pages in the page cache */
Btree **ppBtree /* Pointer to new Btree object written here */
){
int btree_flags = 0;
int rc;
assert( ppBtree != 0);
if( omitJournal ){
btree_flags |= BTREE_OMIT_JOURNAL;
}
if( db->flags & SQLITE_NoReadlock ){
btree_flags |= BTREE_NO_READLOCK;
}
if( zFilename==0 ){
#if TEMP_STORE==0
/* Do nothing */
#endif
#ifndef SQLITE_OMIT_MEMORYDB
#if TEMP_STORE==1
if( db->temp_store==2 ) zFilename = ":memory:";
#endif
#if TEMP_STORE==2
if( db->temp_store!=1 ) zFilename = ":memory:";
#endif
#if TEMP_STORE==3
zFilename = ":memory:";
#endif
#endif /* SQLITE_OMIT_MEMORYDB */
}
rc = sqlite3BtreeOpen(zFilename, (sqlite3 *)db, ppBtree, btree_flags);
if( rc==SQLITE_OK ){
sqlite3BtreeSetBusyHandler(*ppBtree, (void*)&db->busyHandler);
sqlite3BtreeThreadLockHandlers(*ppBtree, (void*)&db->lockEventHandlers);
sqlite3BtreeSetCacheSize(*ppBtree, nCache);
}
return rc;
}
/*
** usage: btree_set_cache_size ID NCACHE
**
** Set the size of the cache used by btree $ID.
*/
static int btree_set_cache_size(
void *NotUsed,
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int argc, /* Number of arguments */
const char **argv /* Text of each argument */
){
int nCache;
Btree *pBt;
if( argc!=3 ){
Tcl_AppendResult(
interp, "wrong # args: should be \"", argv[0], " BT NCACHE\"", 0);
return TCL_ERROR;
}
pBt = sqlite3TestTextToPtr(argv[1]);
if( Tcl_GetInt(interp, argv[2], &nCache) ) return TCL_ERROR;
sqlite3_mutex_enter(pBt->db->mutex);
sqlite3BtreeEnter(pBt);
sqlite3BtreeSetCacheSize(pBt, nCache);
sqlite3BtreeLeave(pBt);
sqlite3_mutex_leave(pBt->db->mutex);
return TCL_OK;
}
/*
** 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 */
int iDb; /* Database index for <database> */
sqlite3 *db = pParse->db;
Db *pDb;
Vdbe *v = sqlite3GetVdbe(pParse);
if( v==0 ) return;
/* 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];
zLeft = sqlite3NameFromToken(pId);
if( !zLeft ) return;
if( minusFlag ){
zRight = sqlite3MPrintf("-%T", pValue);
}else{
zRight = sqlite3NameFromToken(pValue);
}
zDb = ((iDb>0)?pDb->zName:0);
if( sqlite3AuthCheck(pParse, SQLITE_PRAGMA, zLeft, zRight, zDb) ){
goto pragma_out;
}
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
/*
** 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.
**
** The default cache size is stored in meta-value 2 of page 1 of the
** database file. The cache size is actually the absolute value of
** this memory location. The sign of meta-value 2 determines the
** synchronous setting. A negative value means synchronous is off
** and a positive value means synchronous is on.
*/
if( sqlite3StrICmp(zLeft,"default_cache_size")==0 ){
static const VdbeOpList getCacheSize[] = {
{ OP_ReadCookie, 0, 2, 0}, /* 0 */
{ OP_AbsValue, 0, 0, 0},
{ OP_Dup, 0, 0, 0},
{ OP_Integer, 0, 0, 0},
{ OP_Ne, 0, 6, 0},
{ OP_Integer, 0, 0, 0}, /* 5 */
{ OP_Callback, 1, 0, 0},
};
int addr;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
if( !zRight ){
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cache_size", P3_STATIC);
addr = sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
sqlite3VdbeChangeP1(v, addr, iDb);
sqlite3VdbeChangeP1(v, addr+5, MAX_PAGES);
}else{
int size = atoi(zRight);
if( size<0 ) size = -size;
sqlite3BeginWriteOperation(pParse, 0, iDb);
sqlite3VdbeAddOp(v, OP_Integer, size, 0);
sqlite3VdbeAddOp(v, OP_ReadCookie, iDb, 2);
addr = sqlite3VdbeAddOp(v, OP_Integer, 0, 0);
sqlite3VdbeAddOp(v, OP_Ge, 0, addr+3);
sqlite3VdbeAddOp(v, OP_Negative, 0, 0);
sqlite3VdbeAddOp(v, OP_SetCookie, iDb, 2);
pDb->pSchema->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
}
}else
/*
** 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.
*/
if( sqlite3StrICmp(zLeft,"page_size")==0 ){
Btree *pBt = pDb->pBt;
if( !zRight ){
int size = pBt ? sqlite3BtreeGetPageSize(pBt) : 0;
returnSingleInt(pParse, "page_size", size);
}else{
sqlite3BtreeSetPageSize(pBt, atoi(zRight), -1);
}
}else
#endif /* SQLITE_OMIT_PAGER_PRAGMAS */
/*
** PRAGMA [database.]auto_vacuum
** PRAGMA [database.]auto_vacuum=N
**
** Get or set the (boolean) value of the database 'auto-vacuum' parameter.
*/
#ifndef SQLITE_OMIT_AUTOVACUUM
if( sqlite3StrICmp(zLeft,"auto_vacuum")==0 ){
Btree *pBt = pDb->pBt;
if( !zRight ){
int auto_vacuum =
pBt ? sqlite3BtreeGetAutoVacuum(pBt) : SQLITE_DEFAULT_AUTOVACUUM;
returnSingleInt(pParse, "auto_vacuum", auto_vacuum);
}else{
sqlite3BtreeSetAutoVacuum(pBt, getBoolean(zRight));
}
}else
#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 local setting can be different from
** the persistent cache size value that is stored in the database
** file itself. The value returned is the maximum number of
** pages in the page cache. The second form sets the local
** page cache size value. It does not change the persistent
** cache size stored on the disk so the cache size will revert
** to its default value when the database is closed and reopened.
** N should be a positive integer.
*/
if( sqlite3StrICmp(zLeft,"cache_size")==0 ){
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
if( !zRight ){
returnSingleInt(pParse, "cache_size", pDb->pSchema->cache_size);
}else{
int size = atoi(zRight);
if( size<0 ) size = -size;
pDb->pSchema->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
}
}else
/*
** 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
*/
if( sqlite3StrICmp(zLeft, "temp_store")==0 ){
if( !zRight ){
returnSingleInt(pParse, "temp_store", db->temp_store);
}else{
changeTempStorage(pParse, zRight);
}
}else
/*
** 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.
**
*/
if( sqlite3StrICmp(zLeft, "temp_store_directory")==0 ){
if( !zRight ){
if( sqlite3_temp_directory ){
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME,
"temp_store_directory", P3_STATIC);
sqlite3VdbeOp3(v, OP_String8, 0, 0, sqlite3_temp_directory, 0);
sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
}
}else{
if( zRight[0] && !sqlite3OsIsDirWritable(zRight) ){
sqlite3ErrorMsg(pParse, "not a writable directory");
goto pragma_out;
}
if( TEMP_STORE==0
|| (TEMP_STORE==1 && db->temp_store<=1)
|| (TEMP_STORE==2 && db->temp_store==1)
){
invalidateTempStorage(pParse);
}
sqliteFree(sqlite3_temp_directory);
if( zRight[0] ){
sqlite3_temp_directory = zRight;
zRight = 0;
}else{
sqlite3_temp_directory = 0;
}
}
}else
/*
** 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.
*/
if( sqlite3StrICmp(zLeft,"synchronous")==0 ){
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
if( !zRight ){
returnSingleInt(pParse, "synchronous", pDb->safety_level-1);
}else{
if( !db->autoCommit ){
sqlite3ErrorMsg(pParse,
"Safety level may not be changed inside a transaction");
}else{
pDb->safety_level = getSafetyLevel(zRight)+1;
}
}
}else
#endif /* SQLITE_OMIT_PAGER_PRAGMAS */
#ifndef SQLITE_OMIT_FLAG_PRAGMAS
if( flagPragma(pParse, zLeft, zRight) ){
/* The flagPragma() subroutine also generates any necessary code
** there is nothing more to do here */
}else
#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.
*/
if( sqlite3StrICmp(zLeft, "table_info")==0 && zRight ){
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pTab = sqlite3FindTable(db, zRight, zDb);
if( pTab ){
int i;
Column *pCol;
sqlite3VdbeSetNumCols(v, 6);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cid", P3_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P3_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "type", P3_STATIC);
sqlite3VdbeSetColName(v, 3, COLNAME_NAME, "notnull", P3_STATIC);
sqlite3VdbeSetColName(v, 4, COLNAME_NAME, "dflt_value", P3_STATIC);
sqlite3VdbeSetColName(v, 5, COLNAME_NAME, "pk", P3_STATIC);
sqlite3ViewGetColumnNames(pParse, pTab);
for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, pCol->zName, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
pCol->zType ? pCol->zType : "numeric", 0);
sqlite3VdbeAddOp(v, OP_Integer, pCol->notNull, 0);
sqlite3ExprCode(pParse, pCol->pDflt);
sqlite3VdbeAddOp(v, OP_Integer, pCol->isPrimKey, 0);
sqlite3VdbeAddOp(v, OP_Callback, 6, 0);
}
}
}else
if( sqlite3StrICmp(zLeft, "index_info")==0 && zRight ){
Index *pIdx;
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pIdx = sqlite3FindIndex(db, zRight, zDb);
if( pIdx ){
int i;
pTab = pIdx->pTable;
sqlite3VdbeSetNumCols(v, 3);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seqno", P3_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "cid", P3_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "name", P3_STATIC);
for(i=0; i<pIdx->nColumn; i++){
int cnum = pIdx->aiColumn[i];
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeAddOp(v, OP_Integer, cnum, 0);
assert( pTab->nCol>cnum );
sqlite3VdbeOp3(v, OP_String8, 0, 0, pTab->aCol[cnum].zName, 0);
sqlite3VdbeAddOp(v, OP_Callback, 3, 0);
}
}
}else
if( sqlite3StrICmp(zLeft, "index_list")==0 && zRight ){
Index *pIdx;
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pTab = sqlite3FindTable(db, zRight, zDb);
if( pTab ){
v = sqlite3GetVdbe(pParse);
pIdx = pTab->pIndex;
if( pIdx ){
int i = 0;
sqlite3VdbeSetNumCols(v, 3);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", P3_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P3_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "unique", P3_STATIC);
while(pIdx){
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, pIdx->zName, 0);
sqlite3VdbeAddOp(v, OP_Integer, pIdx->onError!=OE_None, 0);
sqlite3VdbeAddOp(v, OP_Callback, 3, 0);
++i;
pIdx = pIdx->pNext;
}
}
}
}else
if( sqlite3StrICmp(zLeft, "database_list")==0 ){
int i;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
sqlite3VdbeSetNumCols(v, 3);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", P3_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P3_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "file", P3_STATIC);
for(i=0; i<db->nDb; i++){
if( db->aDb[i].pBt==0 ) continue;
assert( db->aDb[i].zName!=0 );
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, db->aDb[i].zName, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
sqlite3BtreeGetFilename(db->aDb[i].pBt), 0);
sqlite3VdbeAddOp(v, OP_Callback, 3, 0);
}
}else
if( sqlite3StrICmp(zLeft, "collation_list")==0 ){
int i = 0;
HashElem *p;
sqlite3VdbeSetNumCols(v, 2);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", P3_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P3_STATIC);
for(p=sqliteHashFirst(&db->aCollSeq); p; p=sqliteHashNext(p)){
CollSeq *pColl = (CollSeq *)sqliteHashData(p);
sqlite3VdbeAddOp(v, OP_Integer, i++, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, pColl->zName, 0);
sqlite3VdbeAddOp(v, OP_Callback, 2, 0);
}
}else
#endif /* SQLITE_OMIT_SCHEMA_PRAGMAS */
#ifndef SQLITE_OMIT_FOREIGN_KEY
if( sqlite3StrICmp(zLeft, "foreign_key_list")==0 && zRight ){
FKey *pFK;
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pTab = sqlite3FindTable(db, zRight, zDb);
if( pTab ){
v = sqlite3GetVdbe(pParse);
pFK = pTab->pFKey;
if( pFK ){
int i = 0;
sqlite3VdbeSetNumCols(v, 5);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "id", P3_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "seq", P3_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "table", P3_STATIC);
sqlite3VdbeSetColName(v, 3, COLNAME_NAME, "from", P3_STATIC);
sqlite3VdbeSetColName(v, 4, COLNAME_NAME, "to", P3_STATIC);
while(pFK){
int j;
for(j=0; j<pFK->nCol; j++){
char *zCol = pFK->aCol[j].zCol;
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeAddOp(v, OP_Integer, j, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, pFK->zTo, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
pTab->aCol[pFK->aCol[j].iFrom].zName, 0);
sqlite3VdbeOp3(v, zCol ? OP_String8 : OP_Null, 0, 0, zCol, 0);
sqlite3VdbeAddOp(v, OP_Callback, 5, 0);
}
++i;
pFK = pFK->pNextFrom;
}
}
}
}else
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */
#ifndef NDEBUG
if( sqlite3StrICmp(zLeft, "parser_trace")==0 ){
extern void sqlite3ParserTrace(FILE*, char *);
if( zRight ){
if( getBoolean(zRight) ){
sqlite3ParserTrace(stderr, "parser: ");
}else{
sqlite3ParserTrace(0, 0);
}
}
}else
#endif
/* Reinstall the LIKE and GLOB functions. The variant of LIKE
** used will be case sensitive or not depending on the RHS.
*/
if( sqlite3StrICmp(zLeft, "case_sensitive_like")==0 ){
if( zRight ){
sqlite3RegisterLikeFunctions(db, getBoolean(zRight));
}
}else
#ifndef SQLITE_OMIT_INTEGRITY_CHECK
if( sqlite3StrICmp(zLeft, "integrity_check")==0 ){
int i, j, addr;
/* 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 VdbeOpList endCode[] = {
{ OP_MemLoad, 0, 0, 0},
{ OP_Integer, 0, 0, 0},
{ OP_Ne, 0, 0, 0}, /* 2 */
{ OP_String8, 0, 0, "ok"},
{ OP_Callback, 1, 0, 0},
};
/* Initialize the VDBE program */
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "integrity_check", P3_STATIC);
sqlite3VdbeAddOp(v, OP_MemInt, 0, 0); /* Initialize error count to 0 */
/* 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;
sqlite3CodeVerifySchema(pParse, i);
/* Do an integrity check of the B-Tree
*/
pTbls = &db->aDb[i].pSchema->tblHash;
for(x=sqliteHashFirst(pTbls); x; x=sqliteHashNext(x)){
Table *pTab = sqliteHashData(x);
Index *pIdx;
sqlite3VdbeAddOp(v, OP_Integer, pTab->tnum, 0);
cnt++;
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
sqlite3VdbeAddOp(v, OP_Integer, pIdx->tnum, 0);
cnt++;
}
}
assert( cnt>0 );
sqlite3VdbeAddOp(v, OP_IntegrityCk, cnt, i);
sqlite3VdbeAddOp(v, OP_Dup, 0, 1);
addr = sqlite3VdbeOp3(v, OP_String8, 0, 0, "ok", P3_STATIC);
sqlite3VdbeAddOp(v, OP_Eq, 0, addr+7);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
sqlite3MPrintf("*** in database %s ***\n", db->aDb[i].zName),
P3_DYNAMIC);
sqlite3VdbeAddOp(v, OP_Pull, 1, 0);
sqlite3VdbeAddOp(v, OP_Concat, 0, 1);
sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
sqlite3VdbeAddOp(v, OP_MemIncr, 1, 0);
/* Make sure all the indices are constructed correctly.
*/
sqlite3CodeVerifySchema(pParse, i);
for(x=sqliteHashFirst(pTbls); x; x=sqliteHashNext(x)){
Table *pTab = sqliteHashData(x);
Index *pIdx;
int loopTop;
if( pTab->pIndex==0 ) continue;
sqlite3OpenTableAndIndices(pParse, pTab, 1, OP_OpenRead);
sqlite3VdbeAddOp(v, OP_MemInt, 0, 1);
loopTop = sqlite3VdbeAddOp(v, OP_Rewind, 1, 0);
sqlite3VdbeAddOp(v, OP_MemIncr, 1, 1);
for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
int jmp2;
static const VdbeOpList idxErr[] = {
{ OP_MemIncr, 1, 0, 0},
{ OP_String8, 0, 0, "rowid "},
{ OP_Rowid, 1, 0, 0},
{ OP_String8, 0, 0, " missing from index "},
{ OP_String8, 0, 0, 0}, /* 4 */
{ OP_Concat, 2, 0, 0},
{ OP_Callback, 1, 0, 0},
};
sqlite3GenerateIndexKey(v, pIdx, 1);
jmp2 = sqlite3VdbeAddOp(v, OP_Found, j+2, 0);
addr = sqlite3VdbeAddOpList(v, ArraySize(idxErr), idxErr);
sqlite3VdbeChangeP3(v, addr+4, pIdx->zName, P3_STATIC);
sqlite3VdbeJumpHere(v, jmp2);
}
sqlite3VdbeAddOp(v, OP_Next, 1, loopTop+1);
sqlite3VdbeJumpHere(v, loopTop);
for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
static const VdbeOpList cntIdx[] = {
{ OP_MemInt, 0, 2, 0},
{ OP_Rewind, 0, 0, 0}, /* 1 */
{ OP_MemIncr, 1, 2, 0},
{ OP_Next, 0, 0, 0}, /* 3 */
{ OP_MemLoad, 1, 0, 0},
{ OP_MemLoad, 2, 0, 0},
{ OP_Eq, 0, 0, 0}, /* 6 */
{ OP_MemIncr, 1, 0, 0},
{ OP_String8, 0, 0, "wrong # of entries in index "},
{ OP_String8, 0, 0, 0}, /* 9 */
{ OP_Concat, 0, 0, 0},
{ OP_Callback, 1, 0, 0},
};
if( pIdx->tnum==0 ) continue;
addr = sqlite3VdbeAddOpList(v, ArraySize(cntIdx), cntIdx);
sqlite3VdbeChangeP1(v, addr+1, j+2);
sqlite3VdbeChangeP2(v, addr+1, addr+4);
sqlite3VdbeChangeP1(v, addr+3, j+2);
sqlite3VdbeChangeP2(v, addr+3, addr+2);
sqlite3VdbeJumpHere(v, addr+6);
sqlite3VdbeChangeP3(v, addr+9, pIdx->zName, P3_STATIC);
}
}
}
addr = sqlite3VdbeAddOpList(v, ArraySize(endCode), endCode);
sqlite3VdbeJumpHere(v, addr+2);
}else
#endif /* SQLITE_OMIT_INTEGRITY_CHECK */
#ifndef SQLITE_OMIT_UTF16
/*
** PRAGMA encoding
** PRAGMA encoding = "utf-8"|"utf-16"|"utf-16le"|"utf-16be"
**
** In it's 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
*/
if( sqlite3StrICmp(zLeft, "encoding")==0 ){
static struct EncName {
char *zName;
u8 enc;
} encnames[] = {
{ "UTF-8", SQLITE_UTF8 },
{ "UTF8", SQLITE_UTF8 },
{ "UTF-16le", SQLITE_UTF16LE },
{ "UTF16le", SQLITE_UTF16LE },
{ "UTF-16be", SQLITE_UTF16BE },
{ "UTF16be", SQLITE_UTF16BE },
{ "UTF-16", 0 /* Filled in at run-time */ },
{ "UTF16", 0 /* Filled in at run-time */ },
{ 0, 0 }
};
struct EncName *pEnc;
encnames[6].enc = encnames[7].enc = SQLITE_UTF16NATIVE;
if( !zRight ){ /* "PRAGMA encoding" */
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "encoding", P3_STATIC);
sqlite3VdbeAddOp(v, OP_String8, 0, 0);
for(pEnc=&encnames[0]; pEnc->zName; pEnc++){
if( pEnc->enc==ENC(pParse->db) ){
sqlite3VdbeChangeP3(v, -1, pEnc->zName, P3_STATIC);
break;
}
}
sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
}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) ){
ENC(pParse->db) = pEnc->enc;
break;
}
}
if( !pEnc->zName ){
sqlite3ErrorMsg(pParse, "unsupported encoding: %s", zRight);
}
}
}
}else
#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>
**
** 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.
*/
if( sqlite3StrICmp(zLeft, "schema_version")==0 ||
sqlite3StrICmp(zLeft, "user_version")==0 ){
int iCookie; /* Cookie index. 0 for schema-cookie, 6 for user-cookie. */
if( zLeft[0]=='s' || zLeft[0]=='S' ){
iCookie = 0;
}else{
iCookie = 5;
}
if( zRight ){
/* Write the specified cookie value */
static const VdbeOpList setCookie[] = {
{ OP_Transaction, 0, 1, 0}, /* 0 */
{ OP_Integer, 0, 0, 0}, /* 1 */
{ OP_SetCookie, 0, 0, 0}, /* 2 */
};
int addr = sqlite3VdbeAddOpList(v, ArraySize(setCookie), setCookie);
sqlite3VdbeChangeP1(v, addr, iDb);
sqlite3VdbeChangeP1(v, addr+1, atoi(zRight));
sqlite3VdbeChangeP1(v, addr+2, iDb);
sqlite3VdbeChangeP2(v, addr+2, iCookie);
}else{
/* Read the specified cookie value */
static const VdbeOpList readCookie[] = {
{ OP_ReadCookie, 0, 0, 0}, /* 0 */
{ OP_Callback, 1, 0, 0}
};
int addr = sqlite3VdbeAddOpList(v, ArraySize(readCookie), readCookie);
sqlite3VdbeChangeP1(v, addr, iDb);
sqlite3VdbeChangeP2(v, addr, iCookie);
sqlite3VdbeSetNumCols(v, 1);
}
}
#endif /* SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS */
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
/*
** Report the current state of file logs for all databases
*/
if( sqlite3StrICmp(zLeft, "lock_status")==0 ){
static const char *const azLockName[] = {
"unlocked", "shared", "reserved", "pending", "exclusive"
};
int i;
Vdbe *v = sqlite3GetVdbe(pParse);
sqlite3VdbeSetNumCols(v, 2);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "database", P3_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "status", P3_STATIC);
for(i=0; i<db->nDb; i++){
Btree *pBt;
Pager *pPager;
if( db->aDb[i].zName==0 ) continue;
sqlite3VdbeOp3(v, OP_String8, 0, 0, db->aDb[i].zName, P3_STATIC);
pBt = db->aDb[i].pBt;
if( pBt==0 || (pPager = sqlite3BtreePager(pBt))==0 ){
sqlite3VdbeOp3(v, OP_String8, 0, 0, "closed", P3_STATIC);
}else{
int j = sqlite3pager_lockstate(pPager);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
(j>=0 && j<=4) ? azLockName[j] : "unknown", P3_STATIC);
}
sqlite3VdbeAddOp(v, OP_Callback, 2, 0);
}
}else
#endif
#ifdef SQLITE_SSE
/*
** Check to see if the sqlite_statements table exists. Create it
** if it does not.
*/
if( sqlite3StrICmp(zLeft, "create_sqlite_statement_table")==0 ){
extern int sqlite3CreateStatementsTable(Parse*);
sqlite3CreateStatementsTable(pParse);
}else
#endif
#if SQLITE_HAS_CODEC
if( sqlite3StrICmp(zLeft, "key")==0 ){
sqlite3_key(db, zRight, strlen(zRight));
}else
#endif
{}
if( v ){
/* Code an OP_Expire at the end of each PRAGMA program to cause
** the VDBE implementing the pragma to expire. Most (all?) pragmas
** are only valid for a single execution.
*/
sqlite3VdbeAddOp(v, OP_Expire, 1, 0);
/*
** Reset the safety level, in case the fullfsync flag or synchronous
** setting changed.
*/
if( db->autoCommit ){
sqlite3BtreeSetSafetyLevel(pDb->pBt, pDb->safety_level,
(db->flags&SQLITE_FullFSync)!=0);
}
}
pragma_out:
sqliteFree(zLeft);
sqliteFree(zRight);
}
/*
** Attempt to read the database schema and initialize internal
** data structures for a single database file. The index of the
** database file is given by iDb. iDb==0 is used for the main
** database. iDb==1 should never be used. iDb>=2 is used for
** auxiliary databases. Return one of the SQLITE_ error codes to
** indicate success or failure.
*/
static int sqlite3InitOne(sqlite3 *db, int iDb, char **pzErrMsg){
int rc;
BtCursor *curMain;
int size;
Table *pTab;
Db *pDb;
char const *azArg[4];
int meta[10];
InitData initData;
char const *zMasterSchema;
char const *zMasterName = SCHEMA_TABLE(iDb);
/*
** The master database table has a structure like this
*/
static const char master_schema[] =
"CREATE TABLE sqlite_master(\n"
" type text,\n"
" name text,\n"
" tbl_name text,\n"
" rootpage integer,\n"
" sql text\n"
")"
;
#ifndef SQLITE_OMIT_TEMPDB
static const char temp_master_schema[] =
"CREATE TEMP TABLE sqlite_temp_master(\n"
" type text,\n"
" name text,\n"
" tbl_name text,\n"
" rootpage integer,\n"
" sql text\n"
")"
;
#else
#define temp_master_schema 0
#endif
assert( iDb>=0 && iDb<db->nDb );
assert( db->aDb[iDb].pSchema );
/* zMasterSchema and zInitScript are set to point at the master schema
** and initialisation script appropriate for the database being
** initialised. zMasterName is the name of the master table.
*/
if( !OMIT_TEMPDB && iDb==1 ){
zMasterSchema = temp_master_schema;
}else{
zMasterSchema = master_schema;
}
zMasterName = SCHEMA_TABLE(iDb);
/* Construct the schema tables. */
sqlite3SafetyOff(db);
azArg[0] = zMasterName;
azArg[1] = "1";
azArg[2] = zMasterSchema;
azArg[3] = 0;
initData.db = db;
initData.iDb = iDb;
initData.pzErrMsg = pzErrMsg;
rc = sqlite3InitCallback(&initData, 3, (char **)azArg, 0);
if( rc ){
sqlite3SafetyOn(db);
return initData.rc;
}
pTab = sqlite3FindTable(db, zMasterName, db->aDb[iDb].zName);
if( pTab ){
pTab->readOnly = 1;
}
sqlite3SafetyOn(db);
/* Create a cursor to hold the database open
*/
pDb = &db->aDb[iDb];
if( pDb->pBt==0 ){
if( !OMIT_TEMPDB && iDb==1 ){
DbSetProperty(db, 1, DB_SchemaLoaded);
}
return SQLITE_OK;
}
rc = sqlite3BtreeCursor(pDb->pBt, MASTER_ROOT, 0, 0, 0, &curMain);
if( rc!=SQLITE_OK && rc!=SQLITE_EMPTY ){
sqlite3SetString(pzErrMsg, sqlite3ErrStr(rc), (char*)0);
return rc;
}
/* Get the database meta information.
**
** Meta values are as follows:
** meta[0] Schema cookie. Changes with each schema change.
** meta[1] File format of schema layer.
** meta[2] Size of the page cache.
** meta[3] Use freelist if 0. Autovacuum if greater than zero.
** meta[4] Db text encoding. 1:UTF-8 2:UTF-16LE 3:UTF-16BE
** meta[5] The user cookie. Used by the application.
** meta[6]
** meta[7]
** meta[8]
** meta[9]
**
** Note: The #defined SQLITE_UTF* symbols in sqliteInt.h correspond to
** the possible values of meta[4].
*/
if( rc==SQLITE_OK ){
int i;
for(i=0; rc==SQLITE_OK && i<sizeof(meta)/sizeof(meta[0]); i++){
rc = sqlite3BtreeGetMeta(pDb->pBt, i+1, (u32 *)&meta[i]);
}
if( rc ){
sqlite3SetString(pzErrMsg, sqlite3ErrStr(rc), (char*)0);
sqlite3BtreeCloseCursor(curMain);
return rc;
}
}else{
memset(meta, 0, sizeof(meta));
}
pDb->pSchema->schema_cookie = meta[0];
/* If opening a non-empty database, check the text encoding. For the
** main database, set sqlite3.enc to the encoding of the main database.
** For an attached db, it is an error if the encoding is not the same
** as sqlite3.enc.
*/
if( meta[4] ){ /* text encoding */
if( iDb==0 ){
/* If opening the main database, set ENC(db). */
ENC(db) = (u8)meta[4];
db->pDfltColl = sqlite3FindCollSeq(db, SQLITE_UTF8, "BINARY", 6, 0);
}else{
/* If opening an attached database, the encoding much match ENC(db) */
if( meta[4]!=ENC(db) ){
sqlite3BtreeCloseCursor(curMain);
sqlite3SetString(pzErrMsg, "attached databases must use the same"
" text encoding as main database", (char*)0);
return SQLITE_ERROR;
}
}
}else{
DbSetProperty(db, iDb, DB_Empty);
}
pDb->pSchema->enc = ENC(db);
size = meta[2];
if( size==0 ){ size = MAX_PAGES; }
pDb->pSchema->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
/*
** file_format==1 Version 3.0.0.
** file_format==2 Version 3.1.3. // ALTER TABLE ADD COLUMN
** file_format==3 Version 3.1.4. // ditto but with non-NULL defaults
** file_format==4 Version 3.3.0. // DESC indices. Boolean constants
*/
pDb->pSchema->file_format = meta[1];
if( pDb->pSchema->file_format==0 ){
pDb->pSchema->file_format = 1;
}
if( pDb->pSchema->file_format>SQLITE_MAX_FILE_FORMAT ){
sqlite3BtreeCloseCursor(curMain);
sqlite3SetString(pzErrMsg, "unsupported file format", (char*)0);
return SQLITE_ERROR;
}
/* Read the schema information out of the schema tables
*/
assert( db->init.busy );
if( rc==SQLITE_EMPTY ){
/* For an empty database, there is nothing to read */
rc = SQLITE_OK;
}else{
char *zSql;
zSql = sqlite3MPrintf(
"SELECT name, rootpage, sql FROM '%q'.%s",
db->aDb[iDb].zName, zMasterName);
sqlite3SafetyOff(db);
rc = sqlite3_exec(db, zSql, sqlite3InitCallback, &initData, 0);
if( rc==SQLITE_ABORT ) rc = initData.rc;
sqlite3SafetyOn(db);
sqliteFree(zSql);
#ifndef SQLITE_OMIT_ANALYZE
if( rc==SQLITE_OK ){
sqlite3AnalysisLoad(db, iDb);
}
#endif
sqlite3BtreeCloseCursor(curMain);
}
if( sqlite3MallocFailed() ){
/* sqlite3SetString(pzErrMsg, "out of memory", (char*)0); */
rc = SQLITE_NOMEM;
sqlite3ResetInternalSchema(db, 0);
}
if( rc==SQLITE_OK ){
DbSetProperty(db, iDb, DB_SchemaLoaded);
}else{
sqlite3ResetInternalSchema(db, iDb);
}
return rc;
}
/*
** Attempt to read the database schema and initialize internal
** data structures for a single database file. The index of the
** database file is given by iDb. iDb==0 is used for the main
** database. iDb==1 should never be used. iDb>=2 is used for
** auxiliary databases. Return one of the SQLITE_ error codes to
** indicate success or failure.
*/
static int sqlite3InitOne(sqlite3 *db, int iDb, char **pzErrMsg){
int rc;
BtCursor *curMain;
int size;
Table *pTab;
Db *pDb;
char const *azArg[4];
int meta[10];
InitData initData;
char const *zMasterSchema;
char const *zMasterName = SCHEMA_TABLE(iDb);
/*
** The master database table has a structure like this
*/
static const char master_schema[] =
"CREATE TABLE sqlite_master(\n"
" type text,\n"
" name text,\n"
" tbl_name text,\n"
" rootpage integer,\n"
" sql text\n"
")"
;
#ifndef SQLITE_OMIT_TEMPDB
static const char temp_master_schema[] =
"CREATE TEMP TABLE sqlite_temp_master(\n"
" type text,\n"
" name text,\n"
" tbl_name text,\n"
" rootpage integer,\n"
" sql text\n"
")"
;
#else
#define temp_master_schema 0
#endif
assert( iDb>=0 && iDb<db->nDb );
assert( db->aDb[iDb].pSchema );
assert( sqlite3_mutex_held(db->mutex) );
assert( iDb==1 || sqlite3BtreeHoldsMutex(db->aDb[iDb].pBt) );
/* zMasterSchema and zInitScript are set to point at the master schema
** and initialisation script appropriate for the database being
** initialised. zMasterName is the name of the master table.
*/
if( !OMIT_TEMPDB && iDb==1 ){
zMasterSchema = temp_master_schema;
}else{
zMasterSchema = master_schema;
}
zMasterName = SCHEMA_TABLE(iDb);
/* Construct the schema tables. */
azArg[0] = zMasterName;
azArg[1] = "1";
azArg[2] = zMasterSchema;
azArg[3] = 0;
initData.db = db;
initData.iDb = iDb;
initData.rc = SQLITE_OK;
initData.pzErrMsg = pzErrMsg;
(void)sqlite3SafetyOff(db);
sqlite3InitCallback(&initData, 3, (char **)azArg, 0);
(void)sqlite3SafetyOn(db);
if( initData.rc ){
rc = initData.rc;
goto error_out;
}
pTab = sqlite3FindTable(db, zMasterName, db->aDb[iDb].zName);
if( pTab ){
pTab->tabFlags |= TF_Readonly;
}
/* Create a cursor to hold the database open
*/
pDb = &db->aDb[iDb];
if( pDb->pBt==0 ){
if( !OMIT_TEMPDB && iDb==1 ){
DbSetProperty(db, 1, DB_SchemaLoaded);
}
return SQLITE_OK;
}
curMain = sqlite3MallocZero(sqlite3BtreeCursorSize());
if( !curMain ){
rc = SQLITE_NOMEM;
goto error_out;
}
sqlite3BtreeEnter(pDb->pBt);
rc = sqlite3BtreeCursor(pDb->pBt, MASTER_ROOT, 0, 0, curMain);
if( rc!=SQLITE_OK && rc!=SQLITE_EMPTY ){
sqlite3SetString(pzErrMsg, db, "%s", sqlite3ErrStr(rc));
goto initone_error_out;
}
/* Get the database meta information.
**
** Meta values are as follows:
** meta[0] Schema cookie. Changes with each schema change.
** meta[1] File format of schema layer.
** meta[2] Size of the page cache.
** meta[3] Use freelist if 0. Autovacuum if greater than zero.
** meta[4] Db text encoding. 1:UTF-8 2:UTF-16LE 3:UTF-16BE
** meta[5] The user cookie. Used by the application.
** meta[6] Incremental-vacuum flag.
** meta[7]
** meta[8]
** meta[9]
**
** Note: The #defined SQLITE_UTF* symbols in sqliteInt.h correspond to
** the possible values of meta[4].
*/
if( rc==SQLITE_OK ){
int i;
for(i=0; i<ArraySize(meta); i++){
rc = sqlite3BtreeGetMeta(pDb->pBt, i+1, (u32 *)&meta[i]);
if( rc ){
sqlite3SetString(pzErrMsg, db, "%s", sqlite3ErrStr(rc));
goto initone_error_out;
}
}
}else{
memset(meta, 0, sizeof(meta));
}
pDb->pSchema->schema_cookie = meta[0];
/* If opening a non-empty database, check the text encoding. For the
** main database, set sqlite3.enc to the encoding of the main database.
** For an attached db, it is an error if the encoding is not the same
** as sqlite3.enc.
*/
if( meta[4] ){ /* text encoding */
if( iDb==0 ){
/* If opening the main database, set ENC(db). */
ENC(db) = (u8)meta[4];
db->pDfltColl = sqlite3FindCollSeq(db, SQLITE_UTF8, "BINARY", 6, 0);
}else{
/* If opening an attached database, the encoding much match ENC(db) */
if( meta[4]!=ENC(db) ){
sqlite3SetString(pzErrMsg, db, "attached databases must use the same"
" text encoding as main database");
rc = SQLITE_ERROR;
goto initone_error_out;
}
}
}else{
DbSetProperty(db, iDb, DB_Empty);
}
pDb->pSchema->enc = ENC(db);
if( pDb->pSchema->cache_size==0 ){
size = meta[2];
if( size==0 ){ size = SQLITE_DEFAULT_CACHE_SIZE; }
if( size<0 ) size = -size;
pDb->pSchema->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
}
/*
** file_format==1 Version 3.0.0.
** file_format==2 Version 3.1.3. // ALTER TABLE ADD COLUMN
** file_format==3 Version 3.1.4. // ditto but with non-NULL defaults
** file_format==4 Version 3.3.0. // DESC indices. Boolean constants
*/
pDb->pSchema->file_format = (u8)meta[1];
if( pDb->pSchema->file_format==0 ){
pDb->pSchema->file_format = 1;
}
if( pDb->pSchema->file_format>SQLITE_MAX_FILE_FORMAT ){
sqlite3SetString(pzErrMsg, db, "unsupported file format");
rc = SQLITE_ERROR;
goto initone_error_out;
}
/* Ticket #2804: When we open a database in the newer file format,
** clear the legacy_file_format pragma flag so that a VACUUM will
** not downgrade the database and thus invalidate any descending
** indices that the user might have created.
*/
if( iDb==0 && meta[1]>=4 ){
db->flags &= ~SQLITE_LegacyFileFmt;
}
/* Read the schema information out of the schema tables
*/
assert( db->init.busy );
if( rc==SQLITE_EMPTY ){
/* For an empty database, there is nothing to read */
rc = SQLITE_OK;
}else{
char *zSql;
zSql = sqlite3MPrintf(db,
"SELECT name, rootpage, sql FROM '%q'.%s",
db->aDb[iDb].zName, zMasterName);
(void)sqlite3SafetyOff(db);
#ifndef SQLITE_OMIT_AUTHORIZATION
{
int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
xAuth = db->xAuth;
db->xAuth = 0;
#endif
rc = sqlite3_exec(db, zSql, sqlite3InitCallback, &initData, 0);
#ifndef SQLITE_OMIT_AUTHORIZATION
db->xAuth = xAuth;
}
#endif
if( rc==SQLITE_OK ) rc = initData.rc;
(void)sqlite3SafetyOn(db);
sqlite3DbFree(db, zSql);
#ifndef SQLITE_OMIT_ANALYZE
if( rc==SQLITE_OK ){
sqlite3AnalysisLoad(db, iDb);
}
#endif
}
if( db->mallocFailed ){
rc = SQLITE_NOMEM;
sqlite3ResetInternalSchema(db, 0);
}
if( rc==SQLITE_OK || (db->flags&SQLITE_RecoveryMode)){
/* Black magic: If the SQLITE_RecoveryMode flag is set, then consider
** the schema loaded, even if errors occurred. In this situation the
** current sqlite3_prepare() operation will fail, but the following one
** will attempt to compile the supplied statement against whatever subset
** of the schema was loaded before the error occurred. The primary
** purpose of this is to allow access to the sqlite_master table
** even when its contents have been corrupted.
*/
DbSetProperty(db, iDb, DB_SchemaLoaded);
rc = SQLITE_OK;
}
/* Jump here for an error that occurs after successfully allocating
** curMain and calling sqlite3BtreeEnter(). For an error that occurs
** before that point, jump to error_out.
*/
initone_error_out:
sqlite3BtreeCloseCursor(curMain);
sqlite3_free(curMain);
sqlite3BtreeLeave(pDb->pBt);
error_out:
if( rc==SQLITE_NOMEM || rc==SQLITE_IOERR_NOMEM ){
db->mallocFailed = 1;
}
return rc;
}
/*
** Attempt to read the database schema and initialize internal
** data structures for a single database file. The index of the
** database file is given by iDb. iDb==0 is used for the main
** database. iDb==1 should never be used. iDb>=2 is used for
** auxiliary databases. Return one of the SQLITE_ error codes to
** indicate success or failure.
*/
static int sqlite3InitOne(sqlite3 *db, int iDb, char **pzErrMsg){
int rc;
BtCursor *curMain;
int size;
Table *pTab;
char const *azArg[5];
char zDbNum[30];
int meta[10];
InitData initData;
char const *zMasterSchema;
char const *zMasterName = SCHEMA_TABLE(iDb);
/*
** The master database table has a structure like this
*/
static const char master_schema[] =
"CREATE TABLE sqlite_master(\n"
" type text,\n"
" name text,\n"
" tbl_name text,\n"
" rootpage integer,\n"
" sql text\n"
")"
;
#ifndef SQLITE_OMIT_TEMPDB
static const char temp_master_schema[] =
"CREATE TEMP TABLE sqlite_temp_master(\n"
" type text,\n"
" name text,\n"
" tbl_name text,\n"
" rootpage integer,\n"
" sql text\n"
")"
;
#else
#define temp_master_schema 0
#endif
assert( iDb>=0 && iDb<db->nDb );
/* zMasterSchema and zInitScript are set to point at the master schema
** and initialisation script appropriate for the database being
** initialised. zMasterName is the name of the master table.
*/
if( !OMIT_TEMPDB && iDb==1 ){
zMasterSchema = temp_master_schema;
}else{
zMasterSchema = master_schema;
}
zMasterName = SCHEMA_TABLE(iDb);
/* Construct the schema tables. */
sqlite3SafetyOff(db);
azArg[0] = zMasterName;
azArg[1] = "1";
azArg[2] = zMasterSchema;
sprintf(zDbNum, "%d", iDb);
azArg[3] = zDbNum;
azArg[4] = 0;
initData.db = db;
initData.pzErrMsg = pzErrMsg;
rc = sqlite3InitCallback(&initData, 4, (char **)azArg, 0);
if( rc!=SQLITE_OK ){
sqlite3SafetyOn(db);
return rc;
}
pTab = sqlite3FindTable(db, zMasterName, db->aDb[iDb].zName);
if( pTab ){
pTab->readOnly = 1;
}
sqlite3SafetyOn(db);
/* Create a cursor to hold the database open
*/
if( db->aDb[iDb].pBt==0 ){
if( !OMIT_TEMPDB && iDb==1 ) DbSetProperty(db, 1, DB_SchemaLoaded);
return SQLITE_OK;
}
rc = sqlite3BtreeCursor(db->aDb[iDb].pBt, MASTER_ROOT, 0, 0, 0, &curMain);
if( rc!=SQLITE_OK && rc!=SQLITE_EMPTY ){
sqlite3SetString(pzErrMsg, sqlite3ErrStr(rc), (char*)0);
return rc;
}
/* Get the database meta information.
**
** Meta values are as follows:
** meta[0] Schema cookie. Changes with each schema change.
** meta[1] File format of schema layer.
** meta[2] Size of the page cache.
** meta[3] Use freelist if 0. Autovacuum if greater than zero.
** meta[4] Db text encoding. 1:UTF-8 3:UTF-16 LE 4:UTF-16 BE
** meta[5] The user cookie. Used by the application.
** meta[6]
** meta[7]
** meta[8]
** meta[9]
**
** Note: The hash defined SQLITE_UTF* symbols in sqliteInt.h correspond to
** the possible values of meta[4].
*/
if( rc==SQLITE_OK ){
int i;
for(i=0; rc==SQLITE_OK && i<sizeof(meta)/sizeof(meta[0]); i++){
rc = sqlite3BtreeGetMeta(db->aDb[iDb].pBt, i+1, (u32 *)&meta[i]);
}
if( rc ){
sqlite3SetString(pzErrMsg, sqlite3ErrStr(rc), (char*)0);
sqlite3BtreeCloseCursor(curMain);
return rc;
}
}else{
memset(meta, 0, sizeof(meta));
}
db->aDb[iDb].schema_cookie = meta[0];
/* If opening a non-empty database, check the text encoding. For the
** main database, set sqlite3.enc to the encoding of the main database.
** For an attached db, it is an error if the encoding is not the same
** as sqlite3.enc.
*/
if( meta[4] ){ /* text encoding */
if( iDb==0 ){
/* If opening the main database, set db->enc. */
db->enc = (u8)meta[4];
db->pDfltColl = sqlite3FindCollSeq(db, db->enc, "BINARY", 6, 0);
}else{
/* If opening an attached database, the encoding much match db->enc */
if( meta[4]!=db->enc ){
sqlite3BtreeCloseCursor(curMain);
sqlite3SetString(pzErrMsg, "attached databases must use the same"
" text encoding as main database", (char*)0);
return SQLITE_ERROR;
}
}
}
size = meta[2];
if( size==0 ){ size = MAX_PAGES; }
db->aDb[iDb].cache_size = size;
if( iDb==0 ){
db->file_format = meta[1];
if( db->file_format==0 ){
/* This happens if the database was initially empty */
db->file_format = 1;
}
if( db->file_format==2 || db->file_format==3 ){
/* File format 2 is treated exactly as file format 1. New
** databases are created with file format 1.
*/
db->file_format = 1;
}
}
/*
** file_format==1 Version 3.0.0.
** file_format==2 Version 3.1.3.
** file_format==3 Version 3.1.4.
**
** Version 3.0 can only use files with file_format==1. Version 3.1.3
** can read and write files with file_format==1 or file_format==2.
** Version 3.1.4 can read and write file formats 1, 2 and 3.
*/
if( meta[1]>3 ){
sqlite3BtreeCloseCursor(curMain);
sqlite3SetString(pzErrMsg, "unsupported file format", (char*)0);
return SQLITE_ERROR;
}
sqlite3BtreeSetCacheSize(db->aDb[iDb].pBt, db->aDb[iDb].cache_size);
/* Read the schema information out of the schema tables
*/
assert( db->init.busy );
if( rc==SQLITE_EMPTY ){
/* For an empty database, there is nothing to read */
rc = SQLITE_OK;
}else{
char *zSql;
zSql = sqlite3MPrintf(
"SELECT name, rootpage, sql, '%s' FROM '%q'.%s",
zDbNum, db->aDb[iDb].zName, zMasterName);
sqlite3SafetyOff(db);
rc = sqlite3_exec(db, zSql, sqlite3InitCallback, &initData, 0);
sqlite3SafetyOn(db);
sqliteFree(zSql);
sqlite3BtreeCloseCursor(curMain);
}
if( sqlite3_malloc_failed ){
sqlite3SetString(pzErrMsg, "out of memory", (char*)0);
rc = SQLITE_NOMEM;
sqlite3ResetInternalSchema(db, 0);
}
if( rc==SQLITE_OK ){
DbSetProperty(db, iDb, DB_SchemaLoaded);
}else{
sqlite3ResetInternalSchema(db, iDb);
}
return rc;
}
/* CHANGE 1 of 3: Add function parameter nRes */
SQLITE_PRIVATE int sqlite3RunVacuumForRekey(char **pzErrMsg, sqlite3 *db, int iDb, int nRes){
int rc = SQLITE_OK; /* Return code from service routines */
Btree *pMain; /* The database being vacuumed */
Btree *pTemp; /* The temporary database we vacuum into */
u16 saved_mDbFlags; /* Saved value of db->mDbFlags */
u32 saved_flags; /* Saved value of db->flags */
int saved_nChange; /* Saved value of db->nChange */
int saved_nTotalChange; /* Saved value of db->nTotalChange */
u8 saved_mTrace; /* Saved trace settings */
Db *pDb = 0; /* Database to detach at end of vacuum */
int isMemDb; /* True if vacuuming a :memory: database */
/* CHANGE 2 of 3: Do not define local variable nRes */
/*int nRes;*/ /* Bytes of reserved space at the end of each page */
int nDb; /* Number of attached databases */
const char *zDbMain; /* Schema name of database to vacuum */
if (!db->autoCommit) {
sqlite3SetString(pzErrMsg, db, "cannot VACUUM from within a transaction");
return SQLITE_ERROR;
}
if (db->nVdbeActive>1) {
sqlite3SetString(pzErrMsg, db, "cannot VACUUM - SQL statements in progress");
return SQLITE_ERROR;
}
/* Save the current value of the database flags so that it can be
** restored before returning. Then set the writable-schema flag, and
** disable CHECK and foreign key constraints. */
saved_flags = db->flags;
saved_mDbFlags = db->mDbFlags;
saved_nChange = db->nChange;
saved_nTotalChange = db->nTotalChange;
saved_mTrace = db->mTrace;
db->flags |= SQLITE_WriteSchema | SQLITE_IgnoreChecks;
db->mDbFlags |= DBFLAG_PreferBuiltin | DBFLAG_Vacuum;
db->flags &= ~(SQLITE_ForeignKeys | SQLITE_ReverseOrder | SQLITE_CountRows);
db->mTrace = 0;
zDbMain = db->aDb[iDb].zDbSName;
pMain = db->aDb[iDb].pBt;
isMemDb = sqlite3PagerIsMemdb(sqlite3BtreePager(pMain));
/* Attach the temporary database as 'vacuum_db'. The synchronous pragma
** can be set to 'off' for this file, as it is not recovered if a crash
** occurs anyway. The integrity of the database is maintained by a
** (possibly synchronous) transaction opened on the main database before
** sqlite3BtreeCopyFile() is called.
**
** An optimisation would be to use a non-journaled pager.
** (Later:) I tried setting "PRAGMA vacuum_db.journal_mode=OFF" but
** that actually made the VACUUM run slower. Very little journalling
** actually occurs when doing a vacuum since the vacuum_db is initially
** empty. Only the journal header is written. Apparently it takes more
** time to parse and run the PRAGMA to turn journalling off than it does
** to write the journal header file.
*/
nDb = db->nDb;
rc = execSql(db, pzErrMsg, "ATTACH''AS vacuum_db");
if (rc != SQLITE_OK) goto end_of_vacuum;
assert((db->nDb - 1) == nDb);
pDb = &db->aDb[nDb];
assert(strcmp(pDb->zDbSName, "vacuum_db") == 0);
pTemp = pDb->pBt;
/* The call to execSql() to attach the temp database has left the file
** locked (as there was more than one active statement when the transaction
** to read the schema was concluded. Unlock it here so that this doesn't
** cause problems for the call to BtreeSetPageSize() below. */
sqlite3BtreeCommit(pTemp);
/* CHANGE 3 of 3: Do not call sqlite3BtreeGetOptimalReserve */
/* nRes = sqlite3BtreeGetOptimalReserve(pMain); */
/* A VACUUM cannot change the pagesize of an encrypted database. */
#ifdef SQLITE_HAS_CODEC
if (db->nextPagesize) {
extern void sqlite3CodecGetKey(sqlite3*, int, void**, int*);
int nKey;
char *zKey;
sqlite3CodecGetKey(db, iDb, (void**)&zKey, &nKey);
if (nKey) db->nextPagesize = 0;
}
#endif
sqlite3BtreeSetCacheSize(pTemp, db->aDb[iDb].pSchema->cache_size);
sqlite3BtreeSetSpillSize(pTemp, sqlite3BtreeSetSpillSize(pMain, 0));
sqlite3BtreeSetPagerFlags(pTemp, PAGER_SYNCHRONOUS_OFF | PAGER_CACHESPILL);
/* Begin a transaction and take an exclusive lock on the main database
** file. This is done before the sqlite3BtreeGetPageSize(pMain) call below,
** to ensure that we do not try to change the page-size on a WAL database.
*/
rc = execSql(db, pzErrMsg, "BEGIN");
if (rc != SQLITE_OK) goto end_of_vacuum;
rc = sqlite3BtreeBeginTrans(pMain, 2);
if (rc != SQLITE_OK) goto end_of_vacuum;
/* Do not attempt to change the page size for a WAL database */
if (sqlite3PagerGetJournalMode(sqlite3BtreePager(pMain))
== PAGER_JOURNALMODE_WAL) {
db->nextPagesize = 0;
}
if (sqlite3BtreeSetPageSize(pTemp, sqlite3BtreeGetPageSize(pMain), nRes, 0)
|| (!isMemDb && sqlite3BtreeSetPageSize(pTemp, db->nextPagesize, nRes, 0))
|| NEVER(db->mallocFailed)
) {
rc = SQLITE_NOMEM_BKPT;
goto end_of_vacuum;
}
#ifndef SQLITE_OMIT_AUTOVACUUM
sqlite3BtreeSetAutoVacuum(pTemp, db->nextAutovac >= 0 ? db->nextAutovac :
sqlite3BtreeGetAutoVacuum(pMain));
#endif
/* Query the schema of the main database. Create a mirror schema
** in the temporary database.
*/
db->init.iDb = nDb; /* force new CREATE statements into vacuum_db */
rc = execSqlF(db, pzErrMsg,
"SELECT sql FROM \"%w\".sqlite_master"
" WHERE type='table'AND name<>'sqlite_sequence'"
" AND coalesce(rootpage,1)>0",
zDbMain
);
if (rc != SQLITE_OK) goto end_of_vacuum;
rc = execSqlF(db, pzErrMsg,
"SELECT sql FROM \"%w\".sqlite_master"
" WHERE type='index'",
zDbMain
);
if (rc != SQLITE_OK) goto end_of_vacuum;
db->init.iDb = 0;
/* Loop through the tables in the main database. For each, do
** an "INSERT INTO vacuum_db.xxx SELECT * FROM main.xxx;" to copy
** the contents to the temporary database.
*/
rc = execSqlF(db, pzErrMsg,
"SELECT'INSERT INTO vacuum_db.'||quote(name)"
"||' SELECT*FROM\"%w\".'||quote(name)"
"FROM vacuum_db.sqlite_master "
"WHERE type='table'AND coalesce(rootpage,1)>0",
zDbMain
);
assert((db->mDbFlags & DBFLAG_Vacuum) != 0);
db->mDbFlags &= ~DBFLAG_Vacuum;
if (rc != SQLITE_OK) goto end_of_vacuum;
/* Copy the triggers, views, and virtual tables from the main database
** over to the temporary database. None of these objects has any
** associated storage, so all we have to do is copy their entries
** from the SQLITE_MASTER table.
*/
rc = execSqlF(db, pzErrMsg,
"INSERT INTO vacuum_db.sqlite_master"
" SELECT*FROM \"%w\".sqlite_master"
" WHERE type IN('view','trigger')"
" OR(type='table'AND rootpage=0)",
zDbMain
);
if (rc) goto end_of_vacuum;
/* At this point, there is a write transaction open on both the
** vacuum database and the main database. Assuming no error occurs,
** both transactions are closed by this block - the main database
** transaction by sqlite3BtreeCopyFile() and the other by an explicit
** call to sqlite3BtreeCommit().
*/
{
u32 meta;
int i;
/* This array determines which meta meta values are preserved in the
** vacuum. Even entries are the meta value number and odd entries
** are an increment to apply to the meta value after the vacuum.
** The increment is used to increase the schema cookie so that other
** connections to the same database will know to reread the schema.
*/
static const unsigned char aCopy[] = {
BTREE_SCHEMA_VERSION, 1, /* Add one to the old schema cookie */
BTREE_DEFAULT_CACHE_SIZE, 0, /* Preserve the default page cache size */
BTREE_TEXT_ENCODING, 0, /* Preserve the text encoding */
BTREE_USER_VERSION, 0, /* Preserve the user version */
BTREE_APPLICATION_ID, 0, /* Preserve the application id */
};
assert(1 == sqlite3BtreeIsInTrans(pTemp));
assert(1 == sqlite3BtreeIsInTrans(pMain));
/* Copy Btree meta values */
for (i = 0; i<ArraySize(aCopy); i += 2) {
/* GetMeta() and UpdateMeta() cannot fail in this context because
** we already have page 1 loaded into cache and marked dirty. */
sqlite3BtreeGetMeta(pMain, aCopy[i], &meta);
rc = sqlite3BtreeUpdateMeta(pTemp, aCopy[i], meta + aCopy[i + 1]);
if (NEVER(rc != SQLITE_OK)) goto end_of_vacuum;
}
rc = sqlite3BtreeCopyFile(pMain, pTemp);
if (rc != SQLITE_OK) goto end_of_vacuum;
rc = sqlite3BtreeCommit(pTemp);
if (rc != SQLITE_OK) goto end_of_vacuum;
#ifndef SQLITE_OMIT_AUTOVACUUM
sqlite3BtreeSetAutoVacuum(pMain, sqlite3BtreeGetAutoVacuum(pTemp));
#endif
}
assert(rc == SQLITE_OK);
rc = sqlite3BtreeSetPageSize(pMain, sqlite3BtreeGetPageSize(pTemp), nRes, 1);
end_of_vacuum:
/* Restore the original value of db->flags */
db->init.iDb = 0;
db->mDbFlags = saved_mDbFlags;
db->flags = saved_flags;
db->nChange = saved_nChange;
db->nTotalChange = saved_nTotalChange;
db->mTrace = saved_mTrace;
sqlite3BtreeSetPageSize(pMain, -1, -1, 1);
/* Currently there is an SQL level transaction open on the vacuum
** database. No locks are held on any other files (since the main file
** was committed at the btree level). So it safe to end the transaction
** by manually setting the autoCommit flag to true and detaching the
** vacuum database. The vacuum_db journal file is deleted when the pager
** is closed by the DETACH.
*/
db->autoCommit = 1;
if (pDb) {
sqlite3BtreeClose(pDb->pBt);
pDb->pBt = 0;
pDb->pSchema = 0;
}
/* This both clears the schemas and reduces the size of the db->aDb[]
** array. */
sqlite3ResetAllSchemasOfConnection(db);
return rc;
}
/*
** 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 */
int iDb; /* Database index for <database> */
sqlite3 *db = pParse->db;
Db *pDb;
Vdbe *v = sqlite3GetVdbe(pParse);
if( v==0 ) return;
/* 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];
zLeft = sqlite3NameFromToken(pId);
if( !zLeft ) return;
if( minusFlag ){
zRight = sqlite3MPrintf("-%T", pValue);
}else{
zRight = sqlite3NameFromToken(pValue);
}
zDb = ((iDb>0)?pDb->zName:0);
if( sqlite3AuthCheck(pParse, SQLITE_PRAGMA, zLeft, zRight, zDb) ){
goto pragma_out;
}
/*
** 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.
**
** The default cache size is stored in meta-value 2 of page 1 of the
** database file. The cache size is actually the absolute value of
** this memory location. The sign of meta-value 2 determines the
** synchronous setting. A negative value means synchronous is off
** and a positive value means synchronous is on.
*/
if( sqlite3StrICmp(zLeft,"default_cache_size")==0 ){
static const VdbeOpList getCacheSize[] = {
{ OP_ReadCookie, 0, 2, 0}, /* 0 */
{ OP_AbsValue, 0, 0, 0},
{ OP_Dup, 0, 0, 0},
{ OP_Integer, 0, 0, 0},
{ OP_Ne, 0, 6, 0},
{ OP_Integer, 0, 0, 0}, /* 5 */
{ OP_Callback, 1, 0, 0},
};
int addr;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
if( !zRight ){
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, "cache_size", P3_STATIC);
addr = sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
sqlite3VdbeChangeP1(v, addr, iDb);
sqlite3VdbeChangeP1(v, addr+5, MAX_PAGES);
}else{
int size = atoi(zRight);
if( size<0 ) size = -size;
sqlite3BeginWriteOperation(pParse, 0, iDb);
sqlite3VdbeAddOp(v, OP_Integer, size, 0);
sqlite3VdbeAddOp(v, OP_ReadCookie, iDb, 2);
addr = sqlite3VdbeAddOp(v, OP_Integer, 0, 0);
sqlite3VdbeAddOp(v, OP_Ge, 0, addr+3);
sqlite3VdbeAddOp(v, OP_Negative, 0, 0);
sqlite3VdbeAddOp(v, OP_SetCookie, iDb, 2);
pDb->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->cache_size);
}
}else
/*
** 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.
*/
if( sqlite3StrICmp(zLeft,"page_size")==0 ){
Btree *pBt = pDb->pBt;
if( !zRight ){
int size = pBt ? sqlite3BtreeGetPageSize(pBt) : 0;
returnSingleInt(pParse, "page_size", size);
}else{
sqlite3BtreeSetPageSize(pBt, atoi(zRight), sqlite3BtreeGetReserve(pBt));
}
}else
/*
** PRAGMA [database.]cache_size
** PRAGMA [database.]cache_size=N
**
** The first form reports the current local setting for the
** page cache size. The local setting can be different from
** the persistent cache size value that is stored in the database
** file itself. The value returned is the maximum number of
** pages in the page cache. The second form sets the local
** page cache size value. It does not change the persistent
** cache size stored on the disk so the cache size will revert
** to its default value when the database is closed and reopened.
** N should be a positive integer.
*/
if( sqlite3StrICmp(zLeft,"cache_size")==0 ){
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
if( !zRight ){
returnSingleInt(pParse, "cache_size", pDb->cache_size);
}else{
int size = atoi(zRight);
if( size<0 ) size = -size;
pDb->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->cache_size);
}
}else
/*
** 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
*/
if( sqlite3StrICmp(zLeft, "temp_store")==0 ){
if( !zRight ){
returnSingleInt(pParse, "temp_store", db->temp_store);
}else{
changeTempStorage(pParse, zRight);
}
}else
/*
** 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.
*/
if( sqlite3StrICmp(zLeft,"synchronous")==0 ){
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
if( !zRight ){
returnSingleInt(pParse, "synchronous", pDb->safety_level-1);
}else{
if( !db->autoCommit ){
sqlite3ErrorMsg(pParse,
"Safety level may not be changed inside a transaction");
}else{
pDb->safety_level = getSafetyLevel(zRight)+1;
sqlite3BtreeSetSafetyLevel(pDb->pBt, pDb->safety_level);
}
}
}else
#if 0 /* Used once during development. No longer needed */
if( sqlite3StrICmp(zLeft, "trigger_overhead_test")==0 ){
if( getBoolean(zRight) ){
sqlite3_always_code_trigger_setup = 1;
}else{
sqlite3_always_code_trigger_setup = 0;
}
}else
#endif
if( flagPragma(pParse, zLeft, zRight) ){
/* The flagPragma() subroutine also generates any necessary code
** there is nothing more to do here */
}else
/*
** 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.
*/
if( sqlite3StrICmp(zLeft, "table_info")==0 && zRight ){
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pTab = sqlite3FindTable(db, zRight, zDb);
if( pTab ){
int i;
sqlite3VdbeSetNumCols(v, 6);
sqlite3VdbeSetColName(v, 0, "cid", P3_STATIC);
sqlite3VdbeSetColName(v, 1, "name", P3_STATIC);
sqlite3VdbeSetColName(v, 2, "type", P3_STATIC);
sqlite3VdbeSetColName(v, 3, "notnull", P3_STATIC);
sqlite3VdbeSetColName(v, 4, "dflt_value", P3_STATIC);
sqlite3VdbeSetColName(v, 5, "pk", P3_STATIC);
sqlite3ViewGetColumnNames(pParse, pTab);
for(i=0; i<pTab->nCol; i++){
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, pTab->aCol[i].zName, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
pTab->aCol[i].zType ? pTab->aCol[i].zType : "numeric", 0);
sqlite3VdbeAddOp(v, OP_Integer, pTab->aCol[i].notNull, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
pTab->aCol[i].zDflt, P3_STATIC);
sqlite3VdbeAddOp(v, OP_Integer, pTab->aCol[i].isPrimKey, 0);
sqlite3VdbeAddOp(v, OP_Callback, 6, 0);
}
}
}else
if( sqlite3StrICmp(zLeft, "index_info")==0 && zRight ){
Index *pIdx;
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pIdx = sqlite3FindIndex(db, zRight, zDb);
if( pIdx ){
int i;
pTab = pIdx->pTable;
sqlite3VdbeSetNumCols(v, 3);
sqlite3VdbeSetColName(v, 0, "seqno", P3_STATIC);
sqlite3VdbeSetColName(v, 1, "cid", P3_STATIC);
sqlite3VdbeSetColName(v, 2, "name", P3_STATIC);
for(i=0; i<pIdx->nColumn; i++){
int cnum = pIdx->aiColumn[i];
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeAddOp(v, OP_Integer, cnum, 0);
assert( pTab->nCol>cnum );
sqlite3VdbeOp3(v, OP_String8, 0, 0, pTab->aCol[cnum].zName, 0);
sqlite3VdbeAddOp(v, OP_Callback, 3, 0);
}
}
}else
if( sqlite3StrICmp(zLeft, "index_list")==0 && zRight ){
Index *pIdx;
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pTab = sqlite3FindTable(db, zRight, zDb);
if( pTab ){
v = sqlite3GetVdbe(pParse);
pIdx = pTab->pIndex;
if( pIdx ){
int i = 0;
sqlite3VdbeSetNumCols(v, 3);
sqlite3VdbeSetColName(v, 0, "seq", P3_STATIC);
sqlite3VdbeSetColName(v, 1, "name", P3_STATIC);
sqlite3VdbeSetColName(v, 2, "unique", P3_STATIC);
while(pIdx){
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, pIdx->zName, 0);
sqlite3VdbeAddOp(v, OP_Integer, pIdx->onError!=OE_None, 0);
sqlite3VdbeAddOp(v, OP_Callback, 3, 0);
++i;
pIdx = pIdx->pNext;
}
}
}
}else
if( sqlite3StrICmp(zLeft, "foreign_key_list")==0 && zRight ){
FKey *pFK;
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pTab = sqlite3FindTable(db, zRight, zDb);
if( pTab ){
v = sqlite3GetVdbe(pParse);
pFK = pTab->pFKey;
if( pFK ){
int i = 0;
sqlite3VdbeSetNumCols(v, 5);
sqlite3VdbeSetColName(v, 0, "id", P3_STATIC);
sqlite3VdbeSetColName(v, 1, "seq", P3_STATIC);
sqlite3VdbeSetColName(v, 2, "table", P3_STATIC);
sqlite3VdbeSetColName(v, 3, "from", P3_STATIC);
sqlite3VdbeSetColName(v, 4, "to", P3_STATIC);
while(pFK){
int j;
for(j=0; j<pFK->nCol; j++){
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeAddOp(v, OP_Integer, j, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, pFK->zTo, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
pTab->aCol[pFK->aCol[j].iFrom].zName, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, pFK->aCol[j].zCol, 0);
sqlite3VdbeAddOp(v, OP_Callback, 5, 0);
}
++i;
pFK = pFK->pNextFrom;
}
}
}
}else
if( sqlite3StrICmp(zLeft, "database_list")==0 ){
int i;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
sqlite3VdbeSetNumCols(v, 3);
sqlite3VdbeSetColName(v, 0, "seq", P3_STATIC);
sqlite3VdbeSetColName(v, 1, "name", P3_STATIC);
sqlite3VdbeSetColName(v, 2, "file", P3_STATIC);
for(i=0; i<db->nDb; i++){
if( db->aDb[i].pBt==0 ) continue;
assert( db->aDb[i].zName!=0 );
sqlite3VdbeAddOp(v, OP_Integer, i, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0, db->aDb[i].zName, 0);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
sqlite3BtreeGetFilename(db->aDb[i].pBt), 0);
sqlite3VdbeAddOp(v, OP_Callback, 3, 0);
}
}else
#ifndef NDEBUG
if( sqlite3StrICmp(zLeft, "parser_trace")==0 ){
extern void sqlite3ParserTrace(FILE*, char *);
if( getBoolean(zRight) ){
sqlite3ParserTrace(stdout, "parser: ");
}else{
sqlite3ParserTrace(0, 0);
}
}else
#endif
if( sqlite3StrICmp(zLeft, "integrity_check")==0 ){
int i, j, addr;
/* Code that initializes the integrity check program. Set the
** error count 0
*/
static const VdbeOpList initCode[] = {
{ OP_Integer, 0, 0, 0},
{ OP_MemStore, 0, 1, 0},
};
/* 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 VdbeOpList endCode[] = {
{ OP_MemLoad, 0, 0, 0},
{ OP_Integer, 0, 0, 0},
{ OP_Ne, 0, 0, 0}, /* 2 */
{ OP_String8, 0, 0, "ok"},
{ OP_Callback, 1, 0, 0},
};
/* Initialize the VDBE program */
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, "integrity_check", P3_STATIC);
sqlite3VdbeAddOpList(v, ArraySize(initCode), initCode);
/* Do an integrity check on each database file */
for(i=0; i<db->nDb; i++){
HashElem *x;
int cnt = 0;
sqlite3CodeVerifySchema(pParse, i);
/* Do an integrity check of the B-Tree
*/
for(x=sqliteHashFirst(&db->aDb[i].tblHash); x; x=sqliteHashNext(x)){
Table *pTab = sqliteHashData(x);
Index *pIdx;
sqlite3VdbeAddOp(v, OP_Integer, pTab->tnum, 0);
cnt++;
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
if( sqlite3CheckIndexCollSeq(pParse, pIdx) ) goto pragma_out;
sqlite3VdbeAddOp(v, OP_Integer, pIdx->tnum, 0);
cnt++;
}
}
assert( cnt>0 );
sqlite3VdbeAddOp(v, OP_IntegrityCk, cnt, i);
sqlite3VdbeAddOp(v, OP_Dup, 0, 1);
addr = sqlite3VdbeOp3(v, OP_String8, 0, 0, "ok", P3_STATIC);
sqlite3VdbeAddOp(v, OP_Eq, 0, addr+6);
sqlite3VdbeOp3(v, OP_String8, 0, 0,
sqlite3MPrintf("*** in database %s ***\n", db->aDb[i].zName),
P3_DYNAMIC);
sqlite3VdbeAddOp(v, OP_Pull, 1, 0);
sqlite3VdbeAddOp(v, OP_Concat, 0, 1);
sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
/* Make sure all the indices are constructed correctly.
*/
sqlite3CodeVerifySchema(pParse, i);
for(x=sqliteHashFirst(&db->aDb[i].tblHash); x; x=sqliteHashNext(x)){
Table *pTab = sqliteHashData(x);
Index *pIdx;
int loopTop;
if( pTab->pIndex==0 ) continue;
sqlite3OpenTableAndIndices(pParse, pTab, 1, OP_OpenRead);
sqlite3VdbeAddOp(v, OP_Integer, 0, 0);
sqlite3VdbeAddOp(v, OP_MemStore, 1, 1);
loopTop = sqlite3VdbeAddOp(v, OP_Rewind, 1, 0);
sqlite3VdbeAddOp(v, OP_MemIncr, 1, 0);
for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
int jmp2;
static const VdbeOpList idxErr[] = {
{ OP_MemIncr, 0, 0, 0},
{ OP_String8, 0, 0, "rowid "},
{ OP_Recno, 1, 0, 0},
{ OP_String8, 0, 0, " missing from index "},
{ OP_String8, 0, 0, 0}, /* 4 */
{ OP_Concat, 2, 0, 0},
{ OP_Callback, 1, 0, 0},
};
sqlite3GenerateIndexKey(v, pIdx, 1);
jmp2 = sqlite3VdbeAddOp(v, OP_Found, j+2, 0);
addr = sqlite3VdbeAddOpList(v, ArraySize(idxErr), idxErr);
sqlite3VdbeChangeP3(v, addr+4, pIdx->zName, P3_STATIC);
sqlite3VdbeChangeP2(v, jmp2, sqlite3VdbeCurrentAddr(v));
}
sqlite3VdbeAddOp(v, OP_Next, 1, loopTop+1);
sqlite3VdbeChangeP2(v, loopTop, sqlite3VdbeCurrentAddr(v));
for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
static const VdbeOpList cntIdx[] = {
{ OP_Integer, 0, 0, 0},
{ OP_MemStore, 2, 1, 0},
{ OP_Rewind, 0, 0, 0}, /* 2 */
{ OP_MemIncr, 2, 0, 0},
{ OP_Next, 0, 0, 0}, /* 4 */
{ OP_MemLoad, 1, 0, 0},
{ OP_MemLoad, 2, 0, 0},
{ OP_Eq, 0, 0, 0}, /* 7 */
{ OP_MemIncr, 0, 0, 0},
{ OP_String8, 0, 0, "wrong # of entries in index "},
{ OP_String8, 0, 0, 0}, /* 10 */
{ OP_Concat, 0, 0, 0},
{ OP_Callback, 1, 0, 0},
};
if( pIdx->tnum==0 ) continue;
addr = sqlite3VdbeAddOpList(v, ArraySize(cntIdx), cntIdx);
sqlite3VdbeChangeP1(v, addr+2, j+2);
sqlite3VdbeChangeP2(v, addr+2, addr+5);
sqlite3VdbeChangeP1(v, addr+4, j+2);
sqlite3VdbeChangeP2(v, addr+4, addr+3);
sqlite3VdbeChangeP2(v, addr+7, addr+ArraySize(cntIdx));
sqlite3VdbeChangeP3(v, addr+10, pIdx->zName, P3_STATIC);
}
}
}
addr = sqlite3VdbeAddOpList(v, ArraySize(endCode), endCode);
sqlite3VdbeChangeP2(v, addr+2, addr+ArraySize(endCode));
}else
/*
** PRAGMA encoding
** PRAGMA encoding = "utf-8"|"utf-16"|"utf-16le"|"utf-16be"
**
** In it's 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
*/
if( sqlite3StrICmp(zLeft, "encoding")==0 ){
static struct EncName {
char *zName;
u8 enc;
} encnames[] = {
{ "UTF-8", SQLITE_UTF8 },
{ "UTF8", SQLITE_UTF8 },
{ "UTF-16le", SQLITE_UTF16LE },
{ "UTF16le", SQLITE_UTF16LE },
{ "UTF-16be", SQLITE_UTF16BE },
{ "UTF16be", SQLITE_UTF16BE },
{ "UTF-16", 0 /* Filled in at run-time */ },
{ "UTF16", 0 /* Filled in at run-time */ },
{ 0, 0 }
};
struct EncName *pEnc;
encnames[6].enc = encnames[7].enc = SQLITE_UTF16NATIVE;
if( !zRight ){ /* "PRAGMA encoding" */
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, "encoding", P3_STATIC);
sqlite3VdbeAddOp(v, OP_String8, 0, 0);
for(pEnc=&encnames[0]; pEnc->zName; pEnc++){
if( pEnc->enc==pParse->db->enc ){
sqlite3VdbeChangeP3(v, -1, pEnc->zName, P3_STATIC);
break;
}
}
sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
}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( !(pParse->db->flags&SQLITE_Initialized) ){
for(pEnc=&encnames[0]; pEnc->zName; pEnc++){
if( 0==sqlite3StrICmp(zRight, pEnc->zName) ){
pParse->db->enc = pEnc->enc;
break;
}
}
if( !pEnc->zName ){
sqlite3ErrorMsg(pParse, "unsupported encoding: %s", zRight);
}
}
}
}else
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
/*
** Report the current state of file logs for all databases
*/
if( sqlite3StrICmp(zLeft, "lock_status")==0 ){
static const char *const azLockName[] = {
"unlocked", "shared", "reserved", "pending", "exclusive"
};
int i;
Vdbe *v = sqlite3GetVdbe(pParse);
sqlite3VdbeSetNumCols(v, 2);
sqlite3VdbeSetColName(v, 0, "database", P3_STATIC);
sqlite3VdbeSetColName(v, 1, "status", P3_STATIC);
for(i=0; i<db->nDb; i++){
Btree *pBt;
Pager *pPager;
if( db->aDb[i].zName==0 ) continue;
sqlite3VdbeOp3(v, OP_String, 0, 0, db->aDb[i].zName, P3_STATIC);
pBt = db->aDb[i].pBt;
if( pBt==0 || (pPager = sqlite3BtreePager(pBt))==0 ){
sqlite3VdbeOp3(v, OP_String, 0, 0, "closed", P3_STATIC);
}else{
int j = sqlite3pager_lockstate(pPager);
sqlite3VdbeOp3(v, OP_String, 0, 0,
(j>=0 && j<=4) ? azLockName[j] : "unknown", P3_STATIC);
}
sqlite3VdbeAddOp(v, OP_Callback, 2, 0);
}
}else
#endif
{}
pragma_out:
sqliteFree(zLeft);
sqliteFree(zRight);
}
/*
** 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 */
int iDb; /* Database index for <database> */
sqlite3 *db = pParse->db;
Db *pDb;
Vdbe *v = pParse->pVdbe = sqlite3VdbeCreate(db);
if( v==0 ) return;
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);
}
zDb = ((pId2 && pId2->n>0)?pDb->zName:0);
if( sqlite3AuthCheck(pParse, SQLITE_PRAGMA, zLeft, zRight, zDb) ){
goto pragma_out;
}
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
/*
** 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.
**
** The default cache size is stored in meta-value 2 of page 1 of the
** database file. The cache size is actually the absolute value of
** this memory location. The sign of meta-value 2 determines the
** synchronous setting. A negative value means synchronous is off
** and a positive value means synchronous is on.
*/
if( sqlite3StrICmp(zLeft,"default_cache_size")==0 ){
static const VdbeOpList getCacheSize[] = {
{ OP_ReadCookie, 0, 1, 2}, /* 0 */
{ OP_IfPos, 1, 6, 0},
{ OP_Integer, 0, 2, 0},
{ OP_Subtract, 1, 2, 1},
{ OP_IfPos, 1, 6, 0},
{ OP_Integer, 0, 1, 0}, /* 5 */
{ OP_ResultRow, 1, 1, 0},
};
int addr;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
sqlite3VdbeUsesBtree(v, iDb);
if( !zRight ){
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cache_size", P4_STATIC);
pParse->nMem += 2;
addr = sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
sqlite3VdbeChangeP1(v, addr, iDb);
sqlite3VdbeChangeP1(v, addr+5, SQLITE_DEFAULT_CACHE_SIZE);
}else{
int size = atoi(zRight);
if( size<0 ) size = -size;
sqlite3BeginWriteOperation(pParse, 0, iDb);
sqlite3VdbeAddOp2(v, OP_Integer, size, 1);
sqlite3VdbeAddOp3(v, OP_ReadCookie, iDb, 2, 2);
addr = sqlite3VdbeAddOp2(v, OP_IfPos, 2, 0);
sqlite3VdbeAddOp2(v, OP_Integer, -size, 1);
sqlite3VdbeJumpHere(v, addr);
sqlite3VdbeAddOp3(v, OP_SetCookie, iDb, 2, 1);
pDb->pSchema->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
}
}else
/*
** 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.
*/
if( sqlite3StrICmp(zLeft,"page_size")==0 ){
Btree *pBt = pDb->pBt;
if( !zRight ){
int size = pBt ? sqlite3BtreeGetPageSize(pBt) : 0;
returnSingleInt(pParse, "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 = atoi(zRight);
if( SQLITE_NOMEM==sqlite3BtreeSetPageSize(pBt, db->nextPagesize, -1) ){
db->mallocFailed = 1;
}
}
}else
/*
** 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.
*/
if( sqlite3StrICmp(zLeft,"max_page_count")==0 ){
Btree *pBt = pDb->pBt;
int newMax = 0;
if( zRight ){
newMax = atoi(zRight);
}
if( pBt ){
newMax = sqlite3BtreeMaxPageCount(pBt, newMax);
}
returnSingleInt(pParse, "max_page_count", newMax);
}else
/*
** PRAGMA [database.]page_count
**
** Return the number of pages in the specified database.
*/
if( sqlite3StrICmp(zLeft,"page_count")==0 ){
Vdbe *v;
int iReg;
v = sqlite3GetVdbe(pParse);
if( !v || sqlite3ReadSchema(pParse) ) goto pragma_out;
sqlite3CodeVerifySchema(pParse, iDb);
iReg = ++pParse->nMem;
sqlite3VdbeAddOp2(v, OP_Pagecount, iDb, iReg);
sqlite3VdbeAddOp2(v, OP_ResultRow, iReg, 1);
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "page_count", P4_STATIC);
}else
/*
** PRAGMA [database.]locking_mode
** PRAGMA [database.]locking_mode = (normal|exclusive)
*/
if( sqlite3StrICmp(zLeft,"locking_mode")==0 ){
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 = 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";
}
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "locking_mode", P4_STATIC);
sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, zRet, 0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
}else
/*
** PRAGMA [database.]journal_mode
** PRAGMA [database.]journal_mode = (delete|persist|off)
*/
if( sqlite3StrICmp(zLeft,"journal_mode")==0 ){
int eMode;
static char * const azModeName[] = {"delete", "persist", "off", "truncate"};
if( zRight==0 ){
eMode = PAGER_JOURNALMODE_QUERY;
}else{
int n = strlen(zRight);
eMode = sizeof(azModeName)/sizeof(azModeName[0]) - 1;
while( eMode>=0 && sqlite3StrNICmp(zRight, azModeName[eMode], n)!=0 ){
eMode--;
}
}
if( pId2->n==0 && eMode==PAGER_JOURNALMODE_QUERY ){
/* Simple "PRAGMA journal_mode;" statement. This is a query for
** the current default journal mode (which may be different to
** the journal-mode of the main database).
*/
eMode = db->dfltJournalMode;
}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 journal-mode must be
** set on all attached databases, as well as the main db file.
**
** Also, the sqlite3.dfltJournalMode variable is set so that
** any subsequently attached databases also use the specified
** journal mode.
*/
int ii;
assert(pDb==&db->aDb[0]);
for(ii=1; ii<db->nDb; ii++){
if( db->aDb[ii].pBt ){
pPager = sqlite3BtreePager(db->aDb[ii].pBt);
sqlite3PagerJournalMode(pPager, eMode);
}
}
db->dfltJournalMode = eMode;
}
pPager = sqlite3BtreePager(pDb->pBt);
eMode = sqlite3PagerJournalMode(pPager, eMode);
}
assert( eMode==PAGER_JOURNALMODE_DELETE
|| eMode==PAGER_JOURNALMODE_TRUNCATE
|| eMode==PAGER_JOURNALMODE_PERSIST
|| eMode==PAGER_JOURNALMODE_OFF );
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "journal_mode", P4_STATIC);
sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0,
azModeName[eMode], P4_STATIC);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
}else
/*
** PRAGMA [database.]journal_size_limit
** PRAGMA [database.]journal_size_limit=N
**
** Get or set the (boolean) value of the database 'auto-vacuum' parameter.
*/
if( sqlite3StrICmp(zLeft,"journal_size_limit")==0 ){
Pager *pPager = sqlite3BtreePager(pDb->pBt);
i64 iLimit = -2;
if( zRight ){
int iLimit32 = atoi(zRight);
if( iLimit32<-1 ){
iLimit32 = -1;
}
iLimit = iLimit32;
}
iLimit = sqlite3PagerJournalSizeLimit(pPager, iLimit);
returnSingleInt(pParse, "journal_size_limit", (int)iLimit);
}else
#endif /* SQLITE_OMIT_PAGER_PRAGMAS */
/*
** PRAGMA [database.]auto_vacuum
** PRAGMA [database.]auto_vacuum=N
**
** Get or set the (boolean) value of the database 'auto-vacuum' parameter.
*/
#ifndef SQLITE_OMIT_AUTOVACUUM
if( sqlite3StrICmp(zLeft,"auto_vacuum")==0 ){
Btree *pBt = pDb->pBt;
if( sqlite3ReadSchema(pParse) ){
goto pragma_out;
}
if( !zRight ){
int auto_vacuum =
pBt ? sqlite3BtreeGetAutoVacuum(pBt) : SQLITE_DEFAULT_AUTOVACUUM;
returnSingleInt(pParse, "auto_vacuum", auto_vacuum);
}else{
int eAuto = getAutoVacuum(zRight);
db->nextAutovac = eAuto;
if( eAuto>=0 ){
/* 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.
*/
int 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 VdbeOpList setMeta6[] = {
{ OP_Transaction, 0, 1, 0}, /* 0 */
{ OP_ReadCookie, 0, 1, 3}, /* 1 */
{ OP_If, 1, 0, 0}, /* 2 */
{ OP_Halt, SQLITE_OK, OE_Abort, 0}, /* 3 */
{ OP_Integer, 0, 1, 0}, /* 4 */
{ OP_SetCookie, 0, 6, 1}, /* 5 */
};
int iAddr;
iAddr = sqlite3VdbeAddOpList(v, ArraySize(setMeta6), setMeta6);
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);
}
}
}
}else
#endif
/*
** PRAGMA [database.]incremental_vacuum(N)
**
** Do N steps of incremental vacuuming on a database.
*/
#ifndef SQLITE_OMIT_AUTOVACUUM
if( sqlite3StrICmp(zLeft,"incremental_vacuum")==0 ){
int iLimit, addr;
if( sqlite3ReadSchema(pParse) ){
goto pragma_out;
}
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);
sqlite3VdbeAddOp1(v, OP_ResultRow, 1);
sqlite3VdbeAddOp2(v, OP_AddImm, 1, -1);
sqlite3VdbeAddOp2(v, OP_IfPos, 1, addr);
sqlite3VdbeJumpHere(v, addr);
}else
#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 local setting can be different from
** the persistent cache size value that is stored in the database
** file itself. The value returned is the maximum number of
** pages in the page cache. The second form sets the local
** page cache size value. It does not change the persistent
** cache size stored on the disk so the cache size will revert
** to its default value when the database is closed and reopened.
** N should be a positive integer.
*/
if( sqlite3StrICmp(zLeft,"cache_size")==0 ){
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
if( !zRight ){
returnSingleInt(pParse, "cache_size", pDb->pSchema->cache_size);
}else{
int size = atoi(zRight);
if( size<0 ) size = -size;
pDb->pSchema->cache_size = size;
sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
}
}else
/*
** 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
*/
if( sqlite3StrICmp(zLeft, "temp_store")==0 ){
if( !zRight ){
returnSingleInt(pParse, "temp_store", db->temp_store);
}else{
changeTempStorage(pParse, zRight);
}
}else
/*
** 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.
**
*/
if( sqlite3StrICmp(zLeft, "temp_store_directory")==0 ){
if( !zRight ){
if( sqlite3_temp_directory ){
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME,
"temp_store_directory", P4_STATIC);
sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, sqlite3_temp_directory, 0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
}
}else{
#ifndef SQLITE_OMIT_WSD
if( zRight[0] ){
int rc;
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 = sqlite3DbStrDup(0, zRight);
}else{
sqlite3_temp_directory = 0;
}
#endif /* SQLITE_OMIT_WSD */
}
}else
/*
** 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.
*/
if( sqlite3StrICmp(zLeft,"synchronous")==0 ){
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
if( !zRight ){
returnSingleInt(pParse, "synchronous", pDb->safety_level-1);
}else{
if( !db->autoCommit ){
sqlite3ErrorMsg(pParse,
"Safety level may not be changed inside a transaction");
}else{
pDb->safety_level = getSafetyLevel(zRight)+1;
}
}
}else
#endif /* SQLITE_OMIT_PAGER_PRAGMAS */
#ifndef SQLITE_OMIT_FLAG_PRAGMAS
if( flagPragma(pParse, zLeft, zRight) ){
/* The flagPragma() subroutine also generates any necessary code
** there is nothing more to do here */
}else
#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.
*/
if( sqlite3StrICmp(zLeft, "table_info")==0 && zRight ){
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pTab = sqlite3FindTable(db, zRight, zDb);
if( pTab ){
int i;
int nHidden = 0;
Column *pCol;
sqlite3VdbeSetNumCols(v, 6);
pParse->nMem = 6;
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cid", P4_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P4_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "type", P4_STATIC);
sqlite3VdbeSetColName(v, 3, COLNAME_NAME, "notnull", P4_STATIC);
sqlite3VdbeSetColName(v, 4, COLNAME_NAME, "dflt_value", P4_STATIC);
sqlite3VdbeSetColName(v, 5, COLNAME_NAME, "pk", P4_STATIC);
sqlite3ViewGetColumnNames(pParse, pTab);
for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
const Token *pDflt;
if( IsHiddenColumn(pCol) ){
nHidden++;
continue;
}
sqlite3VdbeAddOp2(v, OP_Integer, i-nHidden, 1);
sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, pCol->zName, 0);
sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0,
pCol->zType ? pCol->zType : "", 0);
sqlite3VdbeAddOp2(v, OP_Integer, pCol->notNull, 4);
if( pCol->pDflt && (pDflt = &pCol->pDflt->span)->z ){
sqlite3VdbeAddOp4(v, OP_String8, 0, 5, 0, (char*)pDflt->z, pDflt->n);
}else{
sqlite3VdbeAddOp2(v, OP_Null, 0, 5);
}
sqlite3VdbeAddOp2(v, OP_Integer, pCol->isPrimKey, 6);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6);
}
}
}else
if( sqlite3StrICmp(zLeft, "index_info")==0 && zRight ){
Index *pIdx;
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pIdx = sqlite3FindIndex(db, zRight, zDb);
if( pIdx ){
int i;
pTab = pIdx->pTable;
sqlite3VdbeSetNumCols(v, 3);
pParse->nMem = 3;
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seqno", P4_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "cid", P4_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "name", P4_STATIC);
for(i=0; i<pIdx->nColumn; i++){
int cnum = pIdx->aiColumn[i];
sqlite3VdbeAddOp2(v, OP_Integer, i, 1);
sqlite3VdbeAddOp2(v, OP_Integer, cnum, 2);
assert( pTab->nCol>cnum );
sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0, pTab->aCol[cnum].zName, 0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
}
}
}else
if( sqlite3StrICmp(zLeft, "index_list")==0 && zRight ){
Index *pIdx;
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pTab = sqlite3FindTable(db, zRight, zDb);
if( pTab ){
v = sqlite3GetVdbe(pParse);
pIdx = pTab->pIndex;
if( pIdx ){
int i = 0;
sqlite3VdbeSetNumCols(v, 3);
pParse->nMem = 3;
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", P4_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P4_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "unique", P4_STATIC);
while(pIdx){
sqlite3VdbeAddOp2(v, OP_Integer, i, 1);
sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, pIdx->zName, 0);
sqlite3VdbeAddOp2(v, OP_Integer, pIdx->onError!=OE_None, 3);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
++i;
pIdx = pIdx->pNext;
}
}
}
}else
if( sqlite3StrICmp(zLeft, "database_list")==0 ){
int i;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
sqlite3VdbeSetNumCols(v, 3);
pParse->nMem = 3;
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", P4_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P4_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "file", P4_STATIC);
for(i=0; i<db->nDb; i++){
if( db->aDb[i].pBt==0 ) continue;
assert( db->aDb[i].zName!=0 );
sqlite3VdbeAddOp2(v, OP_Integer, i, 1);
sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, db->aDb[i].zName, 0);
sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0,
sqlite3BtreeGetFilename(db->aDb[i].pBt), 0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
}
}else
if( sqlite3StrICmp(zLeft, "collation_list")==0 ){
int i = 0;
HashElem *p;
sqlite3VdbeSetNumCols(v, 2);
pParse->nMem = 2;
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", P4_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P4_STATIC);
for(p=sqliteHashFirst(&db->aCollSeq); p; p=sqliteHashNext(p)){
CollSeq *pColl = (CollSeq *)sqliteHashData(p);
sqlite3VdbeAddOp2(v, OP_Integer, i++, 1);
sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, pColl->zName, 0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
}
}else
#endif /* SQLITE_OMIT_SCHEMA_PRAGMAS */
#ifndef SQLITE_OMIT_FOREIGN_KEY
if( sqlite3StrICmp(zLeft, "foreign_key_list")==0 && zRight ){
FKey *pFK;
Table *pTab;
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pTab = sqlite3FindTable(db, zRight, zDb);
if( pTab ){
v = sqlite3GetVdbe(pParse);
pFK = pTab->pFKey;
if( pFK ){
int i = 0;
sqlite3VdbeSetNumCols(v, 5);
pParse->nMem = 5;
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "id", P4_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "seq", P4_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "table", P4_STATIC);
sqlite3VdbeSetColName(v, 3, COLNAME_NAME, "from", P4_STATIC);
sqlite3VdbeSetColName(v, 4, COLNAME_NAME, "to", P4_STATIC);
while(pFK){
int j;
for(j=0; j<pFK->nCol; j++){
char *zCol = pFK->aCol[j].zCol;
sqlite3VdbeAddOp2(v, OP_Integer, i, 1);
sqlite3VdbeAddOp2(v, OP_Integer, j, 2);
sqlite3VdbeAddOp4(v, OP_String8, 0, 3, 0, pFK->zTo, 0);
sqlite3VdbeAddOp4(v, OP_String8, 0, 4, 0,
pTab->aCol[pFK->aCol[j].iFrom].zName, 0);
sqlite3VdbeAddOp4(v, zCol ? OP_String8 : OP_Null, 0, 5, 0, zCol, 0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5);
}
++i;
pFK = pFK->pNextFrom;
}
}
}
}else
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */
#ifndef NDEBUG
if( sqlite3StrICmp(zLeft, "parser_trace")==0 ){
if( zRight ){
if( getBoolean(zRight) ){
sqlite3ParserTrace(stderr, "parser: ");
}else{
sqlite3ParserTrace(0, 0);
}
}
}else
#endif
/* Reinstall the LIKE and GLOB functions. The variant of LIKE
** used will be case sensitive or not depending on the RHS.
*/
if( sqlite3StrICmp(zLeft, "case_sensitive_like")==0 ){
if( zRight ){
sqlite3RegisterLikeFunctions(db, getBoolean(zRight));
}
}else
#ifndef SQLITE_INTEGRITY_CHECK_ERROR_MAX
# define SQLITE_INTEGRITY_CHECK_ERROR_MAX 100
#endif
#ifndef SQLITE_OMIT_INTEGRITY_CHECK
/* Pragma "quick_check" is an experimental reduced version of
** integrity_check designed to detect most database corruption
** without most of the overhead of a full integrity-check.
*/
if( sqlite3StrICmp(zLeft, "integrity_check")==0
|| sqlite3StrICmp(zLeft, "quick_check")==0
){
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 VdbeOpList endCode[] = {
{ OP_AddImm, 1, 0, 0}, /* 0 */
{ OP_IfNeg, 1, 0, 0}, /* 1 */
{ OP_String8, 0, 3, 0}, /* 2 */
{ OP_ResultRow, 3, 1, 0},
};
int isQuick = (zLeft[0]=='q');
/* Initialize the VDBE program */
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
pParse->nMem = 6;
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "integrity_check", P4_STATIC);
/* Set the maximum error count */
mxErr = SQLITE_INTEGRITY_CHECK_ERROR_MAX;
if( zRight ){
mxErr = atoi(zRight);
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;
sqlite3CodeVerifySchema(pParse, i);
addr = sqlite3VdbeAddOp1(v, OP_IfPos, 1); /* Halt if out of errors */
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.
*/
pTbls = &db->aDb[i].pSchema->tblHash;
for(x=sqliteHashFirst(pTbls); x; x=sqliteHashNext(x)){
Table *pTab = sqliteHashData(x);
Index *pIdx;
sqlite3VdbeAddOp2(v, OP_Integer, pTab->tnum, 2+cnt);
cnt++;
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
sqlite3VdbeAddOp2(v, OP_Integer, pIdx->tnum, 2+cnt);
cnt++;
}
}
if( cnt==0 ) continue;
/* Make sure sufficient number of registers have been allocated */
if( pParse->nMem < cnt+4 ){
pParse->nMem = cnt+4;
}
/* Do the b-tree integrity checks */
sqlite3VdbeAddOp3(v, OP_IntegrityCk, 2, cnt, 1);
sqlite3VdbeChangeP5(v, i);
addr = sqlite3VdbeAddOp1(v, OP_IsNull, 2);
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;
int loopTop;
if( pTab->pIndex==0 ) continue;
addr = sqlite3VdbeAddOp1(v, OP_IfPos, 1); /* Stop if out of errors */
sqlite3VdbeAddOp2(v, OP_Halt, 0, 0);
sqlite3VdbeJumpHere(v, addr);
sqlite3OpenTableAndIndices(pParse, pTab, 1, OP_OpenRead);
sqlite3VdbeAddOp2(v, OP_Integer, 0, 2); /* reg(2) will count entries */
loopTop = sqlite3VdbeAddOp2(v, OP_Rewind, 1, 0);
sqlite3VdbeAddOp2(v, OP_AddImm, 2, 1); /* increment entry count */
for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
int jmp2;
static const VdbeOpList idxErr[] = {
{ OP_AddImm, 1, -1, 0},
{ OP_String8, 0, 3, 0}, /* 1 */
{ OP_Rowid, 1, 4, 0},
{ OP_String8, 0, 5, 0}, /* 3 */
{ OP_String8, 0, 6, 0}, /* 4 */
{ OP_Concat, 4, 3, 3},
{ OP_Concat, 5, 3, 3},
{ OP_Concat, 6, 3, 3},
{ OP_ResultRow, 3, 1, 0},
{ OP_IfPos, 1, 0, 0}, /* 9 */
{ OP_Halt, 0, 0, 0},
};
sqlite3GenerateIndexKey(pParse, pIdx, 1, 3, 1);
jmp2 = sqlite3VdbeAddOp3(v, OP_Found, j+2, 0, 3);
addr = sqlite3VdbeAddOpList(v, ArraySize(idxErr), idxErr);
sqlite3VdbeChangeP4(v, addr+1, "rowid ", P4_STATIC);
sqlite3VdbeChangeP4(v, addr+3, " missing from index ", P4_STATIC);
sqlite3VdbeChangeP4(v, addr+4, pIdx->zName, P4_STATIC);
sqlite3VdbeJumpHere(v, addr+9);
sqlite3VdbeJumpHere(v, jmp2);
}
sqlite3VdbeAddOp2(v, OP_Next, 1, loopTop+1);
sqlite3VdbeJumpHere(v, loopTop);
for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
static const VdbeOpList cntIdx[] = {
{ OP_Integer, 0, 3, 0},
{ OP_Rewind, 0, 0, 0}, /* 1 */
{ OP_AddImm, 3, 1, 0},
{ OP_Next, 0, 0, 0}, /* 3 */
{ OP_Eq, 2, 0, 3}, /* 4 */
{ OP_AddImm, 1, -1, 0},
{ OP_String8, 0, 2, 0}, /* 6 */
{ OP_String8, 0, 3, 0}, /* 7 */
{ OP_Concat, 3, 2, 2},
{ OP_ResultRow, 2, 1, 0},
};
if( pIdx->tnum==0 ) continue;
addr = sqlite3VdbeAddOp1(v, OP_IfPos, 1);
sqlite3VdbeAddOp2(v, OP_Halt, 0, 0);
sqlite3VdbeJumpHere(v, addr);
addr = sqlite3VdbeAddOpList(v, ArraySize(cntIdx), cntIdx);
sqlite3VdbeChangeP1(v, addr+1, j+2);
sqlite3VdbeChangeP2(v, addr+1, addr+4);
sqlite3VdbeChangeP1(v, addr+3, j+2);
sqlite3VdbeChangeP2(v, addr+3, addr+2);
sqlite3VdbeJumpHere(v, addr+4);
sqlite3VdbeChangeP4(v, addr+6,
"wrong # of entries in index ", P4_STATIC);
sqlite3VdbeChangeP4(v, addr+7, pIdx->zName, P4_STATIC);
}
}
}
addr = sqlite3VdbeAddOpList(v, ArraySize(endCode), endCode);
sqlite3VdbeChangeP2(v, addr, -mxErr);
sqlite3VdbeJumpHere(v, addr+1);
sqlite3VdbeChangeP4(v, addr+2, "ok", P4_STATIC);
}else
#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
*/
if( sqlite3StrICmp(zLeft, "encoding")==0 ){
static const struct EncName {
char *zName;
u8 enc;
} encnames[] = {
{ "UTF-8", SQLITE_UTF8 },
{ "UTF8", SQLITE_UTF8 },
{ "UTF-16le", SQLITE_UTF16LE },
{ "UTF16le", SQLITE_UTF16LE },
{ "UTF-16be", SQLITE_UTF16BE },
{ "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;
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "encoding", P4_STATIC);
sqlite3VdbeAddOp2(v, OP_String8, 0, 1);
for(pEnc=&encnames[0]; pEnc->zName; pEnc++){
if( pEnc->enc==ENC(pParse->db) ){
sqlite3VdbeChangeP4(v, -1, pEnc->zName, P4_STATIC);
break;
}
}
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
}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) ){
ENC(pParse->db) = pEnc->enc ? pEnc->enc : SQLITE_UTF16NATIVE;
break;
}
}
if( !pEnc->zName ){
sqlite3ErrorMsg(pParse, "unsupported encoding: %s", zRight);
}
}
}
}else
#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>
**
** 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.
*/
if( sqlite3StrICmp(zLeft, "schema_version")==0
|| sqlite3StrICmp(zLeft, "user_version")==0
|| sqlite3StrICmp(zLeft, "freelist_count")==0
){
int iCookie; /* Cookie index. 0 for schema-cookie, 6 for user-cookie. */
sqlite3VdbeUsesBtree(v, iDb);
switch( zLeft[0] ){
case 's': case 'S':
iCookie = 0;
break;
case 'f': case 'F':
iCookie = 1;
iDb = (-1*(iDb+1));
assert(iDb<=0);
break;
default:
iCookie = 5;
break;
}
if( zRight && iDb>=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);
sqlite3VdbeChangeP1(v, addr, iDb);
sqlite3VdbeChangeP1(v, addr+1, atoi(zRight));
sqlite3VdbeChangeP1(v, addr+2, iDb);
sqlite3VdbeChangeP2(v, addr+2, iCookie);
}else{
/* Read the specified cookie value */
static const VdbeOpList readCookie[] = {
{ OP_ReadCookie, 0, 1, 0}, /* 0 */
{ OP_ResultRow, 1, 1, 0}
};
int addr = sqlite3VdbeAddOpList(v, ArraySize(readCookie), readCookie);
sqlite3VdbeChangeP1(v, addr, iDb);
sqlite3VdbeChangeP3(v, addr, iCookie);
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, P4_TRANSIENT);
}
}else
#endif /* SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS */
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
/*
** Report the current state of file logs for all databases
*/
if( sqlite3StrICmp(zLeft, "lock_status")==0 ){
static const char *const azLockName[] = {
"unlocked", "shared", "reserved", "pending", "exclusive"
};
int i;
Vdbe *v = sqlite3GetVdbe(pParse);
sqlite3VdbeSetNumCols(v, 2);
pParse->nMem = 2;
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "database", P4_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "status", P4_STATIC);
for(i=0; i<db->nDb; i++){
Btree *pBt;
Pager *pPager;
const char *zState = "unknown";
int j;
if( db->aDb[i].zName==0 ) continue;
sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, db->aDb[i].zName, P4_STATIC);
pBt = db->aDb[i].pBt;
if( pBt==0 || (pPager = 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];
}
sqlite3VdbeAddOp4(v, OP_String8, 0, 2, 0, zState, P4_STATIC);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
}
}else
#endif
#ifdef SQLITE_SSE
/*
** Check to see if the sqlite_statements table exists. Create it
** if it does not.
*/
if( sqlite3StrICmp(zLeft, "create_sqlite_statement_table")==0 ){
extern int sqlite3CreateStatementsTable(Parse*);
sqlite3CreateStatementsTable(pParse);
}else
#endif
#if SQLITE_HAS_CODEC
if( sqlite3StrICmp(zLeft, "key")==0 ){
sqlite3_key(db, zRight, strlen(zRight));
}else
#endif
#if SQLITE_HAS_CODEC || defined(SQLITE_ENABLE_CEROD)
if( sqlite3StrICmp(zLeft, "activate_extensions")==0 ){
#if SQLITE_HAS_CODEC
if( sqlite3StrNICmp(zRight, "see-", 4)==0 ){
extern void sqlite3_activate_see(const char*);
sqlite3_activate_see(&zRight[4]);
}
#endif
#ifdef SQLITE_ENABLE_CEROD
if( sqlite3StrNICmp(zRight, "cerod-", 6)==0 ){
extern void sqlite3_activate_cerod(const char*);
sqlite3_activate_cerod(&zRight[6]);
}
#endif
}
#endif
{}
if( v ){
/* Code an OP_Expire at the end of each PRAGMA program to cause
** the VDBE implementing the pragma to expire. Most (all?) pragmas
** are only valid for a single execution.
*/
sqlite3VdbeAddOp2(v, OP_Expire, 1, 0);
/*
** Reset the safety level, in case the fullfsync flag or synchronous
** setting changed.
*/
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
if( db->autoCommit ){
sqlite3BtreeSetSafetyLevel(pDb->pBt, pDb->safety_level,
(db->flags&SQLITE_FullFSync)!=0);
}
#endif
}
pragma_out:
sqlite3DbFree(db, zLeft);
sqlite3DbFree(db, zRight);
}
