4 ** The author disclaims copyright to this source code. In place of
5 ** a legal notice, here is a blessing:
7 ** May you do good and not evil.
8 ** May you find forgiveness for yourself and forgive others.
9 ** May you share freely, never taking more than you give.
11 *************************************************************************
12 ** This file contains C code routines that are called by the SQLite parser
13 ** when syntax rules are reduced. The routines in this file handle the
14 ** following kinds of SQL syntax:
25 #include "sqliteInt.h"
27 #ifndef SQLITE_OMIT_SHARED_CACHE
29 ** The TableLock structure is only used by the sqlite3TableLock() and
30 ** codeTableLocks() functions.
33 int iDb
; /* The database containing the table to be locked */
34 int iTab
; /* The root page of the table to be locked */
35 u8 isWriteLock
; /* True for write lock. False for a read lock */
36 const char *zLockName
; /* Name of the table */
40 ** Record the fact that we want to lock a table at run-time.
42 ** The table to be locked has root page iTab and is found in database iDb.
43 ** A read or a write lock can be taken depending on isWritelock.
45 ** This routine just records the fact that the lock is desired. The
46 ** code to make the lock occur is generated by a later call to
47 ** codeTableLocks() which occurs during sqlite3FinishCoding().
49 void sqlite3TableLock(
50 Parse
*pParse
, /* Parsing context */
51 int iDb
, /* Index of the database containing the table to lock */
52 int iTab
, /* Root page number of the table to be locked */
53 u8 isWriteLock
, /* True for a write lock */
54 const char *zName
/* Name of the table to be locked */
56 Parse
*pToplevel
= sqlite3ParseToplevel(pParse
);
63 if( !sqlite3BtreeSharable(pParse
->db
->aDb
[iDb
].pBt
) ) return;
64 for(i
=0; i
<pToplevel
->nTableLock
; i
++){
65 p
= &pToplevel
->aTableLock
[i
];
66 if( p
->iDb
==iDb
&& p
->iTab
==iTab
){
67 p
->isWriteLock
= (p
->isWriteLock
|| isWriteLock
);
72 nBytes
= sizeof(TableLock
) * (pToplevel
->nTableLock
+1);
73 pToplevel
->aTableLock
=
74 sqlite3DbReallocOrFree(pToplevel
->db
, pToplevel
->aTableLock
, nBytes
);
75 if( pToplevel
->aTableLock
){
76 p
= &pToplevel
->aTableLock
[pToplevel
->nTableLock
++];
79 p
->isWriteLock
= isWriteLock
;
82 pToplevel
->nTableLock
= 0;
83 sqlite3OomFault(pToplevel
->db
);
88 ** Code an OP_TableLock instruction for each table locked by the
89 ** statement (configured by calls to sqlite3TableLock()).
91 static void codeTableLocks(Parse
*pParse
){
95 pVdbe
= sqlite3GetVdbe(pParse
);
96 assert( pVdbe
!=0 ); /* sqlite3GetVdbe cannot fail: VDBE already allocated */
98 for(i
=0; i
<pParse
->nTableLock
; i
++){
99 TableLock
*p
= &pParse
->aTableLock
[i
];
101 sqlite3VdbeAddOp4(pVdbe
, OP_TableLock
, p1
, p
->iTab
, p
->isWriteLock
,
102 p
->zLockName
, P4_STATIC
);
106 #define codeTableLocks(x)
110 ** Return TRUE if the given yDbMask object is empty - if it contains no
111 ** 1 bits. This routine is used by the DbMaskAllZero() and DbMaskNotZero()
112 ** macros when SQLITE_MAX_ATTACHED is greater than 30.
114 #if SQLITE_MAX_ATTACHED>30
115 int sqlite3DbMaskAllZero(yDbMask m
){
117 for(i
=0; i
<sizeof(yDbMask
); i
++) if( m
[i
] ) return 0;
123 ** This routine is called after a single SQL statement has been
124 ** parsed and a VDBE program to execute that statement has been
125 ** prepared. This routine puts the finishing touches on the
126 ** VDBE program and resets the pParse structure for the next
129 ** Note that if an error occurred, it might be the case that
130 ** no VDBE code was generated.
132 void sqlite3FinishCoding(Parse
*pParse
){
136 assert( pParse
->pToplevel
==0 );
138 if( pParse
->nested
) return;
139 if( db
->mallocFailed
|| pParse
->nErr
){
140 if( pParse
->rc
==SQLITE_OK
) pParse
->rc
= SQLITE_ERROR
;
144 /* Begin by generating some termination code at the end of the
147 v
= sqlite3GetVdbe(pParse
);
148 assert( !pParse
->isMultiWrite
149 || sqlite3VdbeAssertMayAbort(v
, pParse
->mayAbort
));
151 sqlite3VdbeAddOp0(v
, OP_Halt
);
153 #if SQLITE_USER_AUTHENTICATION
154 if( pParse
->nTableLock
>0 && db
->init
.busy
==0 ){
155 sqlite3UserAuthInit(db
);
156 if( db
->auth
.authLevel
<UAUTH_User
){
157 sqlite3ErrorMsg(pParse
, "user not authenticated");
158 pParse
->rc
= SQLITE_AUTH_USER
;
164 /* The cookie mask contains one bit for each database file open.
165 ** (Bit 0 is for main, bit 1 is for temp, and so forth.) Bits are
166 ** set for each database that is used. Generate code to start a
167 ** transaction on each used database and to verify the schema cookie
168 ** on each used database.
170 if( db
->mallocFailed
==0
171 && (DbMaskNonZero(pParse
->cookieMask
) || pParse
->pConstExpr
)
174 assert( sqlite3VdbeGetOp(v
, 0)->opcode
==OP_Init
);
175 sqlite3VdbeJumpHere(v
, 0);
176 for(iDb
=0; iDb
<db
->nDb
; iDb
++){
178 if( DbMaskTest(pParse
->cookieMask
, iDb
)==0 ) continue;
179 sqlite3VdbeUsesBtree(v
, iDb
);
180 pSchema
= db
->aDb
[iDb
].pSchema
;
181 sqlite3VdbeAddOp4Int(v
,
182 OP_Transaction
, /* Opcode */
184 DbMaskTest(pParse
->writeMask
,iDb
), /* P2 */
185 pSchema
->schema_cookie
, /* P3 */
186 pSchema
->iGeneration
/* P4 */
188 if( db
->init
.busy
==0 ) sqlite3VdbeChangeP5(v
, 1);
190 "usesStmtJournal=%d", pParse
->mayAbort
&& pParse
->isMultiWrite
));
192 #ifndef SQLITE_OMIT_VIRTUALTABLE
193 for(i
=0; i
<pParse
->nVtabLock
; i
++){
194 char *vtab
= (char *)sqlite3GetVTable(db
, pParse
->apVtabLock
[i
]);
195 sqlite3VdbeAddOp4(v
, OP_VBegin
, 0, 0, 0, vtab
, P4_VTAB
);
197 pParse
->nVtabLock
= 0;
200 /* Once all the cookies have been verified and transactions opened,
201 ** obtain the required table-locks. This is a no-op unless the
202 ** shared-cache feature is enabled.
204 codeTableLocks(pParse
);
206 /* Initialize any AUTOINCREMENT data structures required.
208 sqlite3AutoincrementBegin(pParse
);
210 /* Code constant expressions that where factored out of inner loops */
211 if( pParse
->pConstExpr
){
212 ExprList
*pEL
= pParse
->pConstExpr
;
213 pParse
->okConstFactor
= 0;
214 for(i
=0; i
<pEL
->nExpr
; i
++){
215 sqlite3ExprCode(pParse
, pEL
->a
[i
].pExpr
, pEL
->a
[i
].u
.iConstExprReg
);
219 /* Finally, jump back to the beginning of the executable code. */
220 sqlite3VdbeGoto(v
, 1);
225 /* Get the VDBE program ready for execution
227 if( v
&& pParse
->nErr
==0 && !db
->mallocFailed
){
228 assert( pParse
->iCacheLevel
==0 ); /* Disables and re-enables match */
229 /* A minimum of one cursor is required if autoincrement is used
230 * See ticket [a696379c1f08866] */
231 if( pParse
->pAinc
!=0 && pParse
->nTab
==0 ) pParse
->nTab
= 1;
232 sqlite3VdbeMakeReady(v
, pParse
);
233 pParse
->rc
= SQLITE_DONE
;
235 pParse
->rc
= SQLITE_ERROR
;
240 ** Run the parser and code generator recursively in order to generate
241 ** code for the SQL statement given onto the end of the pParse context
242 ** currently under construction. When the parser is run recursively
243 ** this way, the final OP_Halt is not appended and other initialization
244 ** and finalization steps are omitted because those are handling by the
247 ** Not everything is nestable. This facility is designed to permit
248 ** INSERT, UPDATE, and DELETE operations against SQLITE_MASTER. Use
249 ** care if you decide to try to use this routine for some other purposes.
251 void sqlite3NestedParse(Parse
*pParse
, const char *zFormat
, ...){
255 sqlite3
*db
= pParse
->db
;
256 char saveBuf
[PARSE_TAIL_SZ
];
258 if( pParse
->nErr
) return;
259 assert( pParse
->nested
<10 ); /* Nesting should only be of limited depth */
260 va_start(ap
, zFormat
);
261 zSql
= sqlite3VMPrintf(db
, zFormat
, ap
);
264 return; /* A malloc must have failed */
267 memcpy(saveBuf
, PARSE_TAIL(pParse
), PARSE_TAIL_SZ
);
268 memset(PARSE_TAIL(pParse
), 0, PARSE_TAIL_SZ
);
269 sqlite3RunParser(pParse
, zSql
, &zErrMsg
);
270 sqlite3DbFree(db
, zErrMsg
);
271 sqlite3DbFree(db
, zSql
);
272 memcpy(PARSE_TAIL(pParse
), saveBuf
, PARSE_TAIL_SZ
);
276 #if SQLITE_USER_AUTHENTICATION
278 ** Return TRUE if zTable is the name of the system table that stores the
279 ** list of users and their access credentials.
281 int sqlite3UserAuthTable(const char *zTable
){
282 return sqlite3_stricmp(zTable
, "sqlite_user")==0;
287 ** Locate the in-memory structure that describes a particular database
288 ** table given the name of that table and (optionally) the name of the
289 ** database containing the table. Return NULL if not found.
291 ** If zDatabase is 0, all databases are searched for the table and the
292 ** first matching table is returned. (No checking for duplicate table
293 ** names is done.) The search order is TEMP first, then MAIN, then any
294 ** auxiliary databases added using the ATTACH command.
296 ** See also sqlite3LocateTable().
298 Table
*sqlite3FindTable(sqlite3
*db
, const char *zName
, const char *zDatabase
){
302 /* All mutexes are required for schema access. Make sure we hold them. */
303 assert( zDatabase
!=0 || sqlite3BtreeHoldsAllMutexes(db
) );
304 #if SQLITE_USER_AUTHENTICATION
305 /* Only the admin user is allowed to know that the sqlite_user table
307 if( db
->auth
.authLevel
<UAUTH_Admin
&& sqlite3UserAuthTable(zName
)!=0 ){
312 for(i
=OMIT_TEMPDB
; i
<db
->nDb
; i
++){
313 int j
= (i
<2) ? i
^1 : i
; /* Search TEMP before MAIN */
314 if( zDatabase
==0 || sqlite3StrICmp(zDatabase
, db
->aDb
[j
].zDbSName
)==0 ){
315 assert( sqlite3SchemaMutexHeld(db
, j
, 0) );
316 p
= sqlite3HashFind(&db
->aDb
[j
].pSchema
->tblHash
, zName
);
320 /* Not found. If the name we were looking for was temp.sqlite_master
321 ** then change the name to sqlite_temp_master and try again. */
322 if( sqlite3StrICmp(zName
, MASTER_NAME
)!=0 ) break;
323 if( sqlite3_stricmp(zDatabase
, db
->aDb
[1].zDbSName
)!=0 ) break;
324 zName
= TEMP_MASTER_NAME
;
330 ** Locate the in-memory structure that describes a particular database
331 ** table given the name of that table and (optionally) the name of the
332 ** database containing the table. Return NULL if not found. Also leave an
333 ** error message in pParse->zErrMsg.
335 ** The difference between this routine and sqlite3FindTable() is that this
336 ** routine leaves an error message in pParse->zErrMsg where
337 ** sqlite3FindTable() does not.
339 Table
*sqlite3LocateTable(
340 Parse
*pParse
, /* context in which to report errors */
341 u32 flags
, /* LOCATE_VIEW or LOCATE_NOERR */
342 const char *zName
, /* Name of the table we are looking for */
343 const char *zDbase
/* Name of the database. Might be NULL */
347 /* Read the database schema. If an error occurs, leave an error message
348 ** and code in pParse and return NULL. */
349 if( SQLITE_OK
!=sqlite3ReadSchema(pParse
) ){
353 p
= sqlite3FindTable(pParse
->db
, zName
, zDbase
);
355 const char *zMsg
= flags
& LOCATE_VIEW
? "no such view" : "no such table";
356 #ifndef SQLITE_OMIT_VIRTUALTABLE
357 if( sqlite3FindDbName(pParse
->db
, zDbase
)<1 ){
358 /* If zName is the not the name of a table in the schema created using
359 ** CREATE, then check to see if it is the name of an virtual table that
360 ** can be an eponymous virtual table. */
361 Module
*pMod
= (Module
*)sqlite3HashFind(&pParse
->db
->aModule
, zName
);
362 if( pMod
==0 && sqlite3_strnicmp(zName
, "pragma_", 7)==0 ){
363 pMod
= sqlite3PragmaVtabRegister(pParse
->db
, zName
);
365 if( pMod
&& sqlite3VtabEponymousTableInit(pParse
, pMod
) ){
366 return pMod
->pEpoTab
;
370 if( (flags
& LOCATE_NOERR
)==0 ){
372 sqlite3ErrorMsg(pParse
, "%s: %s.%s", zMsg
, zDbase
, zName
);
374 sqlite3ErrorMsg(pParse
, "%s: %s", zMsg
, zName
);
376 pParse
->checkSchema
= 1;
384 ** Locate the table identified by *p.
386 ** This is a wrapper around sqlite3LocateTable(). The difference between
387 ** sqlite3LocateTable() and this function is that this function restricts
388 ** the search to schema (p->pSchema) if it is not NULL. p->pSchema may be
389 ** non-NULL if it is part of a view or trigger program definition. See
390 ** sqlite3FixSrcList() for details.
392 Table
*sqlite3LocateTableItem(
395 struct SrcList_item
*p
398 assert( p
->pSchema
==0 || p
->zDatabase
==0 );
400 int iDb
= sqlite3SchemaToIndex(pParse
->db
, p
->pSchema
);
401 zDb
= pParse
->db
->aDb
[iDb
].zDbSName
;
405 return sqlite3LocateTable(pParse
, flags
, p
->zName
, zDb
);
409 ** Locate the in-memory structure that describes
410 ** a particular index given the name of that index
411 ** and the name of the database that contains the index.
412 ** Return NULL if not found.
414 ** If zDatabase is 0, all databases are searched for the
415 ** table and the first matching index is returned. (No checking
416 ** for duplicate index names is done.) The search order is
417 ** TEMP first, then MAIN, then any auxiliary databases added
418 ** using the ATTACH command.
420 Index
*sqlite3FindIndex(sqlite3
*db
, const char *zName
, const char *zDb
){
423 /* All mutexes are required for schema access. Make sure we hold them. */
424 assert( zDb
!=0 || sqlite3BtreeHoldsAllMutexes(db
) );
425 for(i
=OMIT_TEMPDB
; i
<db
->nDb
; i
++){
426 int j
= (i
<2) ? i
^1 : i
; /* Search TEMP before MAIN */
427 Schema
*pSchema
= db
->aDb
[j
].pSchema
;
429 if( zDb
&& sqlite3StrICmp(zDb
, db
->aDb
[j
].zDbSName
) ) continue;
430 assert( sqlite3SchemaMutexHeld(db
, j
, 0) );
431 p
= sqlite3HashFind(&pSchema
->idxHash
, zName
);
438 ** Reclaim the memory used by an index
440 static void freeIndex(sqlite3
*db
, Index
*p
){
441 #ifndef SQLITE_OMIT_ANALYZE
442 sqlite3DeleteIndexSamples(db
, p
);
444 sqlite3ExprDelete(db
, p
->pPartIdxWhere
);
445 sqlite3ExprListDelete(db
, p
->aColExpr
);
446 sqlite3DbFree(db
, p
->zColAff
);
447 if( p
->isResized
) sqlite3DbFree(db
, (void *)p
->azColl
);
448 #ifdef SQLITE_ENABLE_STAT3_OR_STAT4
449 sqlite3_free(p
->aiRowEst
);
451 sqlite3DbFree(db
, p
);
455 ** For the index called zIdxName which is found in the database iDb,
456 ** unlike that index from its Table then remove the index from
457 ** the index hash table and free all memory structures associated
460 void sqlite3UnlinkAndDeleteIndex(sqlite3
*db
, int iDb
, const char *zIdxName
){
464 assert( sqlite3SchemaMutexHeld(db
, iDb
, 0) );
465 pHash
= &db
->aDb
[iDb
].pSchema
->idxHash
;
466 pIndex
= sqlite3HashInsert(pHash
, zIdxName
, 0);
467 if( ALWAYS(pIndex
) ){
468 if( pIndex
->pTable
->pIndex
==pIndex
){
469 pIndex
->pTable
->pIndex
= pIndex
->pNext
;
472 /* Justification of ALWAYS(); The index must be on the list of
474 p
= pIndex
->pTable
->pIndex
;
475 while( ALWAYS(p
) && p
->pNext
!=pIndex
){ p
= p
->pNext
; }
476 if( ALWAYS(p
&& p
->pNext
==pIndex
) ){
477 p
->pNext
= pIndex
->pNext
;
480 freeIndex(db
, pIndex
);
482 db
->mDbFlags
|= DBFLAG_SchemaChange
;
486 ** Look through the list of open database files in db->aDb[] and if
487 ** any have been closed, remove them from the list. Reallocate the
488 ** db->aDb[] structure to a smaller size, if possible.
490 ** Entry 0 (the "main" database) and entry 1 (the "temp" database)
491 ** are never candidates for being collapsed.
493 void sqlite3CollapseDatabaseArray(sqlite3
*db
){
495 for(i
=j
=2; i
<db
->nDb
; i
++){
496 struct Db
*pDb
= &db
->aDb
[i
];
498 sqlite3DbFree(db
, pDb
->zDbSName
);
503 db
->aDb
[j
] = db
->aDb
[i
];
508 if( db
->nDb
<=2 && db
->aDb
!=db
->aDbStatic
){
509 memcpy(db
->aDbStatic
, db
->aDb
, 2*sizeof(db
->aDb
[0]));
510 sqlite3DbFree(db
, db
->aDb
);
511 db
->aDb
= db
->aDbStatic
;
516 ** Reset the schema for the database at index iDb. Also reset the
517 ** TEMP schema. The reset is deferred if db->nSchemaLock is not zero.
518 ** Deferred resets may be run by calling with iDb<0.
520 void sqlite3ResetOneSchema(sqlite3
*db
, int iDb
){
522 assert( iDb
<db
->nDb
);
525 assert( sqlite3SchemaMutexHeld(db
, iDb
, 0) );
526 DbSetProperty(db
, iDb
, DB_ResetWanted
);
527 DbSetProperty(db
, 1, DB_ResetWanted
);
530 if( db
->nSchemaLock
==0 ){
531 for(i
=0; i
<db
->nDb
; i
++){
532 if( DbHasProperty(db
, i
, DB_ResetWanted
) ){
533 sqlite3SchemaClear(db
->aDb
[i
].pSchema
);
540 ** Erase all schema information from all attached databases (including
541 ** "main" and "temp") for a single database connection.
543 void sqlite3ResetAllSchemasOfConnection(sqlite3
*db
){
545 sqlite3BtreeEnterAll(db
);
546 assert( db
->nSchemaLock
==0 );
547 for(i
=0; i
<db
->nDb
; i
++){
548 Db
*pDb
= &db
->aDb
[i
];
550 sqlite3SchemaClear(pDb
->pSchema
);
553 db
->mDbFlags
&= ~DBFLAG_SchemaChange
;
554 sqlite3VtabUnlockList(db
);
555 sqlite3BtreeLeaveAll(db
);
556 sqlite3CollapseDatabaseArray(db
);
560 ** This routine is called when a commit occurs.
562 void sqlite3CommitInternalChanges(sqlite3
*db
){
563 db
->mDbFlags
&= ~DBFLAG_SchemaChange
;
567 ** Delete memory allocated for the column names of a table or view (the
568 ** Table.aCol[] array).
570 void sqlite3DeleteColumnNames(sqlite3
*db
, Table
*pTable
){
574 if( (pCol
= pTable
->aCol
)!=0 ){
575 for(i
=0; i
<pTable
->nCol
; i
++, pCol
++){
576 sqlite3DbFree(db
, pCol
->zName
);
577 sqlite3ExprDelete(db
, pCol
->pDflt
);
578 sqlite3DbFree(db
, pCol
->zColl
);
580 sqlite3DbFree(db
, pTable
->aCol
);
585 ** Remove the memory data structures associated with the given
586 ** Table. No changes are made to disk by this routine.
588 ** This routine just deletes the data structure. It does not unlink
589 ** the table data structure from the hash table. But it does destroy
590 ** memory structures of the indices and foreign keys associated with
593 ** The db parameter is optional. It is needed if the Table object
594 ** contains lookaside memory. (Table objects in the schema do not use
595 ** lookaside memory, but some ephemeral Table objects do.) Or the
596 ** db parameter can be used with db->pnBytesFreed to measure the memory
597 ** used by the Table object.
599 static void SQLITE_NOINLINE
deleteTable(sqlite3
*db
, Table
*pTable
){
600 Index
*pIndex
, *pNext
;
603 /* Record the number of outstanding lookaside allocations in schema Tables
604 ** prior to doing any free() operations. Since schema Tables do not use
605 ** lookaside, this number should not change. */
607 if( db
&& (pTable
->tabFlags
& TF_Ephemeral
)==0 ){
608 nLookaside
= sqlite3LookasideUsed(db
, 0);
612 /* Delete all indices associated with this table. */
613 for(pIndex
= pTable
->pIndex
; pIndex
; pIndex
=pNext
){
614 pNext
= pIndex
->pNext
;
615 assert( pIndex
->pSchema
==pTable
->pSchema
616 || (IsVirtual(pTable
) && pIndex
->idxType
!=SQLITE_IDXTYPE_APPDEF
) );
617 if( (db
==0 || db
->pnBytesFreed
==0) && !IsVirtual(pTable
) ){
618 char *zName
= pIndex
->zName
;
619 TESTONLY ( Index
*pOld
= ) sqlite3HashInsert(
620 &pIndex
->pSchema
->idxHash
, zName
, 0
622 assert( db
==0 || sqlite3SchemaMutexHeld(db
, 0, pIndex
->pSchema
) );
623 assert( pOld
==pIndex
|| pOld
==0 );
625 freeIndex(db
, pIndex
);
628 /* Delete any foreign keys attached to this table. */
629 sqlite3FkDelete(db
, pTable
);
631 /* Delete the Table structure itself.
633 sqlite3DeleteColumnNames(db
, pTable
);
634 sqlite3DbFree(db
, pTable
->zName
);
635 sqlite3DbFree(db
, pTable
->zColAff
);
636 sqlite3SelectDelete(db
, pTable
->pSelect
);
637 sqlite3ExprListDelete(db
, pTable
->pCheck
);
638 #ifndef SQLITE_OMIT_VIRTUALTABLE
639 sqlite3VtabClear(db
, pTable
);
641 sqlite3DbFree(db
, pTable
);
643 /* Verify that no lookaside memory was used by schema tables */
644 assert( nLookaside
==0 || nLookaside
==sqlite3LookasideUsed(db
,0) );
646 void sqlite3DeleteTable(sqlite3
*db
, Table
*pTable
){
647 /* Do not delete the table until the reference count reaches zero. */
648 if( !pTable
) return;
649 if( ((!db
|| db
->pnBytesFreed
==0) && (--pTable
->nTabRef
)>0) ) return;
650 deleteTable(db
, pTable
);
655 ** Unlink the given table from the hash tables and the delete the
656 ** table structure with all its indices and foreign keys.
658 void sqlite3UnlinkAndDeleteTable(sqlite3
*db
, int iDb
, const char *zTabName
){
663 assert( iDb
>=0 && iDb
<db
->nDb
);
665 assert( sqlite3SchemaMutexHeld(db
, iDb
, 0) );
666 testcase( zTabName
[0]==0 ); /* Zero-length table names are allowed */
668 p
= sqlite3HashInsert(&pDb
->pSchema
->tblHash
, zTabName
, 0);
669 sqlite3DeleteTable(db
, p
);
670 db
->mDbFlags
|= DBFLAG_SchemaChange
;
674 ** Given a token, return a string that consists of the text of that
675 ** token. Space to hold the returned string
676 ** is obtained from sqliteMalloc() and must be freed by the calling
679 ** Any quotation marks (ex: "name", 'name', [name], or `name`) that
680 ** surround the body of the token are removed.
682 ** Tokens are often just pointers into the original SQL text and so
683 ** are not \000 terminated and are not persistent. The returned string
684 ** is \000 terminated and is persistent.
686 char *sqlite3NameFromToken(sqlite3
*db
, Token
*pName
){
689 zName
= sqlite3DbStrNDup(db
, (char*)pName
->z
, pName
->n
);
690 sqlite3Dequote(zName
);
698 ** Open the sqlite_master table stored in database number iDb for
699 ** writing. The table is opened using cursor 0.
701 void sqlite3OpenMasterTable(Parse
*p
, int iDb
){
702 Vdbe
*v
= sqlite3GetVdbe(p
);
703 sqlite3TableLock(p
, iDb
, MASTER_ROOT
, 1, MASTER_NAME
);
704 sqlite3VdbeAddOp4Int(v
, OP_OpenWrite
, 0, MASTER_ROOT
, iDb
, 5);
711 ** Parameter zName points to a nul-terminated buffer containing the name
712 ** of a database ("main", "temp" or the name of an attached db). This
713 ** function returns the index of the named database in db->aDb[], or
714 ** -1 if the named db cannot be found.
716 int sqlite3FindDbName(sqlite3
*db
, const char *zName
){
717 int i
= -1; /* Database number */
720 for(i
=(db
->nDb
-1), pDb
=&db
->aDb
[i
]; i
>=0; i
--, pDb
--){
721 if( 0==sqlite3_stricmp(pDb
->zDbSName
, zName
) ) break;
722 /* "main" is always an acceptable alias for the primary database
723 ** even if it has been renamed using SQLITE_DBCONFIG_MAINDBNAME. */
724 if( i
==0 && 0==sqlite3_stricmp("main", zName
) ) break;
731 ** The token *pName contains the name of a database (either "main" or
732 ** "temp" or the name of an attached db). This routine returns the
733 ** index of the named database in db->aDb[], or -1 if the named db
736 int sqlite3FindDb(sqlite3
*db
, Token
*pName
){
737 int i
; /* Database number */
738 char *zName
; /* Name we are searching for */
739 zName
= sqlite3NameFromToken(db
, pName
);
740 i
= sqlite3FindDbName(db
, zName
);
741 sqlite3DbFree(db
, zName
);
745 /* The table or view or trigger name is passed to this routine via tokens
746 ** pName1 and pName2. If the table name was fully qualified, for example:
748 ** CREATE TABLE xxx.yyy (...);
750 ** Then pName1 is set to "xxx" and pName2 "yyy". On the other hand if
751 ** the table name is not fully qualified, i.e.:
753 ** CREATE TABLE yyy(...);
755 ** Then pName1 is set to "yyy" and pName2 is "".
757 ** This routine sets the *ppUnqual pointer to point at the token (pName1 or
758 ** pName2) that stores the unqualified table name. The index of the
759 ** database "xxx" is returned.
761 int sqlite3TwoPartName(
762 Parse
*pParse
, /* Parsing and code generating context */
763 Token
*pName1
, /* The "xxx" in the name "xxx.yyy" or "xxx" */
764 Token
*pName2
, /* The "yyy" in the name "xxx.yyy" */
765 Token
**pUnqual
/* Write the unqualified object name here */
767 int iDb
; /* Database holding the object */
768 sqlite3
*db
= pParse
->db
;
772 if( db
->init
.busy
) {
773 sqlite3ErrorMsg(pParse
, "corrupt database");
777 iDb
= sqlite3FindDb(db
, pName1
);
779 sqlite3ErrorMsg(pParse
, "unknown database %T", pName1
);
783 assert( db
->init
.iDb
==0 || db
->init
.busy
784 || (db
->mDbFlags
& DBFLAG_Vacuum
)!=0);
792 ** This routine is used to check if the UTF-8 string zName is a legal
793 ** unqualified name for a new schema object (table, index, view or
794 ** trigger). All names are legal except those that begin with the string
795 ** "sqlite_" (in upper, lower or mixed case). This portion of the namespace
796 ** is reserved for internal use.
798 int sqlite3CheckObjectName(Parse
*pParse
, const char *zName
){
799 if( !pParse
->db
->init
.busy
&& pParse
->nested
==0
800 && (pParse
->db
->flags
& SQLITE_WriteSchema
)==0
801 && 0==sqlite3StrNICmp(zName
, "sqlite_", 7) ){
802 sqlite3ErrorMsg(pParse
, "object name reserved for internal use: %s", zName
);
809 ** Return the PRIMARY KEY index of a table
811 Index
*sqlite3PrimaryKeyIndex(Table
*pTab
){
813 for(p
=pTab
->pIndex
; p
&& !IsPrimaryKeyIndex(p
); p
=p
->pNext
){}
818 ** Return the column of index pIdx that corresponds to table
819 ** column iCol. Return -1 if not found.
821 i16
sqlite3ColumnOfIndex(Index
*pIdx
, i16 iCol
){
823 for(i
=0; i
<pIdx
->nColumn
; i
++){
824 if( iCol
==pIdx
->aiColumn
[i
] ) return i
;
830 ** Begin constructing a new table representation in memory. This is
831 ** the first of several action routines that get called in response
832 ** to a CREATE TABLE statement. In particular, this routine is called
833 ** after seeing tokens "CREATE" and "TABLE" and the table name. The isTemp
834 ** flag is true if the table should be stored in the auxiliary database
835 ** file instead of in the main database file. This is normally the case
836 ** when the "TEMP" or "TEMPORARY" keyword occurs in between
839 ** The new table record is initialized and put in pParse->pNewTable.
840 ** As more of the CREATE TABLE statement is parsed, additional action
841 ** routines will be called to add more information to this record.
842 ** At the end of the CREATE TABLE statement, the sqlite3EndTable() routine
843 ** is called to complete the construction of the new table record.
845 void sqlite3StartTable(
846 Parse
*pParse
, /* Parser context */
847 Token
*pName1
, /* First part of the name of the table or view */
848 Token
*pName2
, /* Second part of the name of the table or view */
849 int isTemp
, /* True if this is a TEMP table */
850 int isView
, /* True if this is a VIEW */
851 int isVirtual
, /* True if this is a VIRTUAL table */
852 int noErr
/* Do nothing if table already exists */
855 char *zName
= 0; /* The name of the new table */
856 sqlite3
*db
= pParse
->db
;
858 int iDb
; /* Database number to create the table in */
859 Token
*pName
; /* Unqualified name of the table to create */
861 if( db
->init
.busy
&& db
->init
.newTnum
==1 ){
862 /* Special case: Parsing the sqlite_master or sqlite_temp_master schema */
864 zName
= sqlite3DbStrDup(db
, SCHEMA_TABLE(iDb
));
867 /* The common case */
868 iDb
= sqlite3TwoPartName(pParse
, pName1
, pName2
, &pName
);
870 if( !OMIT_TEMPDB
&& isTemp
&& pName2
->n
>0 && iDb
!=1 ){
871 /* If creating a temp table, the name may not be qualified. Unless
872 ** the database name is "temp" anyway. */
873 sqlite3ErrorMsg(pParse
, "temporary table name must be unqualified");
876 if( !OMIT_TEMPDB
&& isTemp
) iDb
= 1;
877 zName
= sqlite3NameFromToken(db
, pName
);
879 pParse
->sNameToken
= *pName
;
880 if( zName
==0 ) return;
881 if( SQLITE_OK
!=sqlite3CheckObjectName(pParse
, zName
) ){
882 goto begin_table_error
;
884 if( db
->init
.iDb
==1 ) isTemp
= 1;
885 #ifndef SQLITE_OMIT_AUTHORIZATION
886 assert( isTemp
==0 || isTemp
==1 );
887 assert( isView
==0 || isView
==1 );
889 static const u8 aCode
[] = {
891 SQLITE_CREATE_TEMP_TABLE
,
893 SQLITE_CREATE_TEMP_VIEW
895 char *zDb
= db
->aDb
[iDb
].zDbSName
;
896 if( sqlite3AuthCheck(pParse
, SQLITE_INSERT
, SCHEMA_TABLE(isTemp
), 0, zDb
) ){
897 goto begin_table_error
;
899 if( !isVirtual
&& sqlite3AuthCheck(pParse
, (int)aCode
[isTemp
+2*isView
],
901 goto begin_table_error
;
906 /* Make sure the new table name does not collide with an existing
907 ** index or table name in the same database. Issue an error message if
908 ** it does. The exception is if the statement being parsed was passed
909 ** to an sqlite3_declare_vtab() call. In that case only the column names
910 ** and types will be used, so there is no need to test for namespace
913 if( !IN_DECLARE_VTAB
){
914 char *zDb
= db
->aDb
[iDb
].zDbSName
;
915 if( SQLITE_OK
!=sqlite3ReadSchema(pParse
) ){
916 goto begin_table_error
;
918 pTable
= sqlite3FindTable(db
, zName
, zDb
);
921 sqlite3ErrorMsg(pParse
, "table %T already exists", pName
);
923 assert( !db
->init
.busy
|| CORRUPT_DB
);
924 sqlite3CodeVerifySchema(pParse
, iDb
);
926 goto begin_table_error
;
928 if( sqlite3FindIndex(db
, zName
, zDb
)!=0 ){
929 sqlite3ErrorMsg(pParse
, "there is already an index named %s", zName
);
930 goto begin_table_error
;
934 pTable
= sqlite3DbMallocZero(db
, sizeof(Table
));
936 assert( db
->mallocFailed
);
937 pParse
->rc
= SQLITE_NOMEM_BKPT
;
939 goto begin_table_error
;
941 pTable
->zName
= zName
;
943 pTable
->pSchema
= db
->aDb
[iDb
].pSchema
;
945 #ifdef SQLITE_DEFAULT_ROWEST
946 pTable
->nRowLogEst
= sqlite3LogEst(SQLITE_DEFAULT_ROWEST
);
948 pTable
->nRowLogEst
= 200; assert( 200==sqlite3LogEst(1048576) );
950 assert( pParse
->pNewTable
==0 );
951 pParse
->pNewTable
= pTable
;
953 /* If this is the magic sqlite_sequence table used by autoincrement,
954 ** then record a pointer to this table in the main database structure
955 ** so that INSERT can find the table easily.
957 #ifndef SQLITE_OMIT_AUTOINCREMENT
958 if( !pParse
->nested
&& strcmp(zName
, "sqlite_sequence")==0 ){
959 assert( sqlite3SchemaMutexHeld(db
, iDb
, 0) );
960 pTable
->pSchema
->pSeqTab
= pTable
;
964 /* Begin generating the code that will insert the table record into
965 ** the SQLITE_MASTER table. Note in particular that we must go ahead
966 ** and allocate the record number for the table entry now. Before any
967 ** PRIMARY KEY or UNIQUE keywords are parsed. Those keywords will cause
968 ** indices to be created and the table record must come before the
969 ** indices. Hence, the record number for the table must be allocated
972 if( !db
->init
.busy
&& (v
= sqlite3GetVdbe(pParse
))!=0 ){
975 int reg1
, reg2
, reg3
;
976 /* nullRow[] is an OP_Record encoding of a row containing 5 NULLs */
977 static const char nullRow
[] = { 6, 0, 0, 0, 0, 0 };
978 sqlite3BeginWriteOperation(pParse
, 1, iDb
);
980 #ifndef SQLITE_OMIT_VIRTUALTABLE
982 sqlite3VdbeAddOp0(v
, OP_VBegin
);
986 /* If the file format and encoding in the database have not been set,
989 reg1
= pParse
->regRowid
= ++pParse
->nMem
;
990 reg2
= pParse
->regRoot
= ++pParse
->nMem
;
991 reg3
= ++pParse
->nMem
;
992 sqlite3VdbeAddOp3(v
, OP_ReadCookie
, iDb
, reg3
, BTREE_FILE_FORMAT
);
993 sqlite3VdbeUsesBtree(v
, iDb
);
994 addr1
= sqlite3VdbeAddOp1(v
, OP_If
, reg3
); VdbeCoverage(v
);
995 fileFormat
= (db
->flags
& SQLITE_LegacyFileFmt
)!=0 ?
996 1 : SQLITE_MAX_FILE_FORMAT
;
997 sqlite3VdbeAddOp3(v
, OP_SetCookie
, iDb
, BTREE_FILE_FORMAT
, fileFormat
);
998 sqlite3VdbeAddOp3(v
, OP_SetCookie
, iDb
, BTREE_TEXT_ENCODING
, ENC(db
));
999 sqlite3VdbeJumpHere(v
, addr1
);
1001 /* This just creates a place-holder record in the sqlite_master table.
1002 ** The record created does not contain anything yet. It will be replaced
1003 ** by the real entry in code generated at sqlite3EndTable().
1005 ** The rowid for the new entry is left in register pParse->regRowid.
1006 ** The root page number of the new table is left in reg pParse->regRoot.
1007 ** The rowid and root page number values are needed by the code that
1008 ** sqlite3EndTable will generate.
1010 #if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
1011 if( isView
|| isVirtual
){
1012 sqlite3VdbeAddOp2(v
, OP_Integer
, 0, reg2
);
1017 sqlite3VdbeAddOp3(v
, OP_CreateBtree
, iDb
, reg2
, BTREE_INTKEY
);
1019 sqlite3OpenMasterTable(pParse
, iDb
);
1020 sqlite3VdbeAddOp2(v
, OP_NewRowid
, 0, reg1
);
1021 sqlite3VdbeAddOp4(v
, OP_Blob
, 6, reg3
, 0, nullRow
, P4_STATIC
);
1022 sqlite3VdbeAddOp3(v
, OP_Insert
, 0, reg3
, reg1
);
1023 sqlite3VdbeChangeP5(v
, OPFLAG_APPEND
);
1024 sqlite3VdbeAddOp0(v
, OP_Close
);
1027 /* Normal (non-error) return. */
1030 /* If an error occurs, we jump here */
1032 sqlite3DbFree(db
, zName
);
1036 /* Set properties of a table column based on the (magical)
1037 ** name of the column.
1039 #if SQLITE_ENABLE_HIDDEN_COLUMNS
1040 void sqlite3ColumnPropertiesFromName(Table
*pTab
, Column
*pCol
){
1041 if( sqlite3_strnicmp(pCol
->zName
, "__hidden__", 10)==0 ){
1042 pCol
->colFlags
|= COLFLAG_HIDDEN
;
1043 }else if( pTab
&& pCol
!=pTab
->aCol
&& (pCol
[-1].colFlags
& COLFLAG_HIDDEN
) ){
1044 pTab
->tabFlags
|= TF_OOOHidden
;
1051 ** Add a new column to the table currently being constructed.
1053 ** The parser calls this routine once for each column declaration
1054 ** in a CREATE TABLE statement. sqlite3StartTable() gets called
1055 ** first to get things going. Then this routine is called for each
1058 void sqlite3AddColumn(Parse
*pParse
, Token
*pName
, Token
*pType
){
1064 sqlite3
*db
= pParse
->db
;
1065 if( (p
= pParse
->pNewTable
)==0 ) return;
1066 if( p
->nCol
+1>db
->aLimit
[SQLITE_LIMIT_COLUMN
] ){
1067 sqlite3ErrorMsg(pParse
, "too many columns on %s", p
->zName
);
1070 z
= sqlite3DbMallocRaw(db
, pName
->n
+ pType
->n
+ 2);
1072 memcpy(z
, pName
->z
, pName
->n
);
1075 for(i
=0; i
<p
->nCol
; i
++){
1076 if( sqlite3_stricmp(z
, p
->aCol
[i
].zName
)==0 ){
1077 sqlite3ErrorMsg(pParse
, "duplicate column name: %s", z
);
1078 sqlite3DbFree(db
, z
);
1082 if( (p
->nCol
& 0x7)==0 ){
1084 aNew
= sqlite3DbRealloc(db
,p
->aCol
,(p
->nCol
+8)*sizeof(p
->aCol
[0]));
1086 sqlite3DbFree(db
, z
);
1091 pCol
= &p
->aCol
[p
->nCol
];
1092 memset(pCol
, 0, sizeof(p
->aCol
[0]));
1094 sqlite3ColumnPropertiesFromName(p
, pCol
);
1097 /* If there is no type specified, columns have the default affinity
1099 pCol
->affinity
= SQLITE_AFF_BLOB
;
1102 zType
= z
+ sqlite3Strlen30(z
) + 1;
1103 memcpy(zType
, pType
->z
, pType
->n
);
1104 zType
[pType
->n
] = 0;
1105 sqlite3Dequote(zType
);
1106 pCol
->affinity
= sqlite3AffinityType(zType
, &pCol
->szEst
);
1107 pCol
->colFlags
|= COLFLAG_HASTYPE
;
1110 pParse
->constraintName
.n
= 0;
1114 ** This routine is called by the parser while in the middle of
1115 ** parsing a CREATE TABLE statement. A "NOT NULL" constraint has
1116 ** been seen on a column. This routine sets the notNull flag on
1117 ** the column currently under construction.
1119 void sqlite3AddNotNull(Parse
*pParse
, int onError
){
1121 p
= pParse
->pNewTable
;
1122 if( p
==0 || NEVER(p
->nCol
<1) ) return;
1123 p
->aCol
[p
->nCol
-1].notNull
= (u8
)onError
;
1124 p
->tabFlags
|= TF_HasNotNull
;
1128 ** Scan the column type name zType (length nType) and return the
1129 ** associated affinity type.
1131 ** This routine does a case-independent search of zType for the
1132 ** substrings in the following table. If one of the substrings is
1133 ** found, the corresponding affinity is returned. If zType contains
1134 ** more than one of the substrings, entries toward the top of
1135 ** the table take priority. For example, if zType is 'BLOBINT',
1136 ** SQLITE_AFF_INTEGER is returned.
1138 ** Substring | Affinity
1139 ** --------------------------------
1140 ** 'INT' | SQLITE_AFF_INTEGER
1141 ** 'CHAR' | SQLITE_AFF_TEXT
1142 ** 'CLOB' | SQLITE_AFF_TEXT
1143 ** 'TEXT' | SQLITE_AFF_TEXT
1144 ** 'BLOB' | SQLITE_AFF_BLOB
1145 ** 'REAL' | SQLITE_AFF_REAL
1146 ** 'FLOA' | SQLITE_AFF_REAL
1147 ** 'DOUB' | SQLITE_AFF_REAL
1149 ** If none of the substrings in the above table are found,
1150 ** SQLITE_AFF_NUMERIC is returned.
1152 char sqlite3AffinityType(const char *zIn
, u8
*pszEst
){
1154 char aff
= SQLITE_AFF_NUMERIC
;
1155 const char *zChar
= 0;
1159 h
= (h
<<8) + sqlite3UpperToLower
[(*zIn
)&0xff];
1161 if( h
==(('c'<<24)+('h'<<16)+('a'<<8)+'r') ){ /* CHAR */
1162 aff
= SQLITE_AFF_TEXT
;
1164 }else if( h
==(('c'<<24)+('l'<<16)+('o'<<8)+'b') ){ /* CLOB */
1165 aff
= SQLITE_AFF_TEXT
;
1166 }else if( h
==(('t'<<24)+('e'<<16)+('x'<<8)+'t') ){ /* TEXT */
1167 aff
= SQLITE_AFF_TEXT
;
1168 }else if( h
==(('b'<<24)+('l'<<16)+('o'<<8)+'b') /* BLOB */
1169 && (aff
==SQLITE_AFF_NUMERIC
|| aff
==SQLITE_AFF_REAL
) ){
1170 aff
= SQLITE_AFF_BLOB
;
1171 if( zIn
[0]=='(' ) zChar
= zIn
;
1172 #ifndef SQLITE_OMIT_FLOATING_POINT
1173 }else if( h
==(('r'<<24)+('e'<<16)+('a'<<8)+'l') /* REAL */
1174 && aff
==SQLITE_AFF_NUMERIC
){
1175 aff
= SQLITE_AFF_REAL
;
1176 }else if( h
==(('f'<<24)+('l'<<16)+('o'<<8)+'a') /* FLOA */
1177 && aff
==SQLITE_AFF_NUMERIC
){
1178 aff
= SQLITE_AFF_REAL
;
1179 }else if( h
==(('d'<<24)+('o'<<16)+('u'<<8)+'b') /* DOUB */
1180 && aff
==SQLITE_AFF_NUMERIC
){
1181 aff
= SQLITE_AFF_REAL
;
1183 }else if( (h
&0x00FFFFFF)==(('i'<<16)+('n'<<8)+'t') ){ /* INT */
1184 aff
= SQLITE_AFF_INTEGER
;
1189 /* If pszEst is not NULL, store an estimate of the field size. The
1190 ** estimate is scaled so that the size of an integer is 1. */
1192 *pszEst
= 1; /* default size is approx 4 bytes */
1193 if( aff
<SQLITE_AFF_NUMERIC
){
1196 if( sqlite3Isdigit(zChar
[0]) ){
1198 sqlite3GetInt32(zChar
, &v
);
1200 if( v
>255 ) v
= 255;
1201 *pszEst
= v
; /* BLOB(k), VARCHAR(k), CHAR(k) -> r=(k/4+1) */
1207 *pszEst
= 5; /* BLOB, TEXT, CLOB -> r=5 (approx 20 bytes)*/
1215 ** The expression is the default value for the most recently added column
1216 ** of the table currently under construction.
1218 ** Default value expressions must be constant. Raise an exception if this
1221 ** This routine is called by the parser while in the middle of
1222 ** parsing a CREATE TABLE statement.
1224 void sqlite3AddDefaultValue(Parse
*pParse
, ExprSpan
*pSpan
){
1227 sqlite3
*db
= pParse
->db
;
1228 p
= pParse
->pNewTable
;
1230 pCol
= &(p
->aCol
[p
->nCol
-1]);
1231 if( !sqlite3ExprIsConstantOrFunction(pSpan
->pExpr
, db
->init
.busy
) ){
1232 sqlite3ErrorMsg(pParse
, "default value of column [%s] is not constant",
1235 /* A copy of pExpr is used instead of the original, as pExpr contains
1236 ** tokens that point to volatile memory. The 'span' of the expression
1237 ** is required by pragma table_info.
1240 sqlite3ExprDelete(db
, pCol
->pDflt
);
1241 memset(&x
, 0, sizeof(x
));
1243 x
.u
.zToken
= sqlite3DbStrNDup(db
, (char*)pSpan
->zStart
,
1244 (int)(pSpan
->zEnd
- pSpan
->zStart
));
1245 x
.pLeft
= pSpan
->pExpr
;
1247 pCol
->pDflt
= sqlite3ExprDup(db
, &x
, EXPRDUP_REDUCE
);
1248 sqlite3DbFree(db
, x
.u
.zToken
);
1251 sqlite3ExprDelete(db
, pSpan
->pExpr
);
1255 ** Backwards Compatibility Hack:
1257 ** Historical versions of SQLite accepted strings as column names in
1258 ** indexes and PRIMARY KEY constraints and in UNIQUE constraints. Example:
1260 ** CREATE TABLE xyz(a,b,c,d,e,PRIMARY KEY('a'),UNIQUE('b','c' COLLATE trim)
1261 ** CREATE INDEX abc ON xyz('c','d' DESC,'e' COLLATE nocase DESC);
1263 ** This is goofy. But to preserve backwards compatibility we continue to
1264 ** accept it. This routine does the necessary conversion. It converts
1265 ** the expression given in its argument from a TK_STRING into a TK_ID
1266 ** if the expression is just a TK_STRING with an optional COLLATE clause.
1267 ** If the epxression is anything other than TK_STRING, the expression is
1270 static void sqlite3StringToId(Expr
*p
){
1271 if( p
->op
==TK_STRING
){
1273 }else if( p
->op
==TK_COLLATE
&& p
->pLeft
->op
==TK_STRING
){
1274 p
->pLeft
->op
= TK_ID
;
1279 ** Designate the PRIMARY KEY for the table. pList is a list of names
1280 ** of columns that form the primary key. If pList is NULL, then the
1281 ** most recently added column of the table is the primary key.
1283 ** A table can have at most one primary key. If the table already has
1284 ** a primary key (and this is the second primary key) then create an
1287 ** If the PRIMARY KEY is on a single column whose datatype is INTEGER,
1288 ** then we will try to use that column as the rowid. Set the Table.iPKey
1289 ** field of the table under construction to be the index of the
1290 ** INTEGER PRIMARY KEY column. Table.iPKey is set to -1 if there is
1291 ** no INTEGER PRIMARY KEY.
1293 ** If the key is not an INTEGER PRIMARY KEY, then create a unique
1294 ** index for the key. No index is created for INTEGER PRIMARY KEYs.
1296 void sqlite3AddPrimaryKey(
1297 Parse
*pParse
, /* Parsing context */
1298 ExprList
*pList
, /* List of field names to be indexed */
1299 int onError
, /* What to do with a uniqueness conflict */
1300 int autoInc
, /* True if the AUTOINCREMENT keyword is present */
1301 int sortOrder
/* SQLITE_SO_ASC or SQLITE_SO_DESC */
1303 Table
*pTab
= pParse
->pNewTable
;
1307 if( pTab
==0 ) goto primary_key_exit
;
1308 if( pTab
->tabFlags
& TF_HasPrimaryKey
){
1309 sqlite3ErrorMsg(pParse
,
1310 "table \"%s\" has more than one primary key", pTab
->zName
);
1311 goto primary_key_exit
;
1313 pTab
->tabFlags
|= TF_HasPrimaryKey
;
1315 iCol
= pTab
->nCol
- 1;
1316 pCol
= &pTab
->aCol
[iCol
];
1317 pCol
->colFlags
|= COLFLAG_PRIMKEY
;
1320 nTerm
= pList
->nExpr
;
1321 for(i
=0; i
<nTerm
; i
++){
1322 Expr
*pCExpr
= sqlite3ExprSkipCollate(pList
->a
[i
].pExpr
);
1323 assert( pCExpr
!=0 );
1324 sqlite3StringToId(pCExpr
);
1325 if( pCExpr
->op
==TK_ID
){
1326 const char *zCName
= pCExpr
->u
.zToken
;
1327 for(iCol
=0; iCol
<pTab
->nCol
; iCol
++){
1328 if( sqlite3StrICmp(zCName
, pTab
->aCol
[iCol
].zName
)==0 ){
1329 pCol
= &pTab
->aCol
[iCol
];
1330 pCol
->colFlags
|= COLFLAG_PRIMKEY
;
1339 && sqlite3StrICmp(sqlite3ColumnType(pCol
,""), "INTEGER")==0
1340 && sortOrder
!=SQLITE_SO_DESC
1343 pTab
->keyConf
= (u8
)onError
;
1344 assert( autoInc
==0 || autoInc
==1 );
1345 pTab
->tabFlags
|= autoInc
*TF_Autoincrement
;
1346 if( pList
) pParse
->iPkSortOrder
= pList
->a
[0].sortOrder
;
1347 }else if( autoInc
){
1348 #ifndef SQLITE_OMIT_AUTOINCREMENT
1349 sqlite3ErrorMsg(pParse
, "AUTOINCREMENT is only allowed on an "
1350 "INTEGER PRIMARY KEY");
1353 sqlite3CreateIndex(pParse
, 0, 0, 0, pList
, onError
, 0,
1354 0, sortOrder
, 0, SQLITE_IDXTYPE_PRIMARYKEY
);
1359 sqlite3ExprListDelete(pParse
->db
, pList
);
1364 ** Add a new CHECK constraint to the table currently under construction.
1366 void sqlite3AddCheckConstraint(
1367 Parse
*pParse
, /* Parsing context */
1368 Expr
*pCheckExpr
/* The check expression */
1370 #ifndef SQLITE_OMIT_CHECK
1371 Table
*pTab
= pParse
->pNewTable
;
1372 sqlite3
*db
= pParse
->db
;
1373 if( pTab
&& !IN_DECLARE_VTAB
1374 && !sqlite3BtreeIsReadonly(db
->aDb
[db
->init
.iDb
].pBt
)
1376 pTab
->pCheck
= sqlite3ExprListAppend(pParse
, pTab
->pCheck
, pCheckExpr
);
1377 if( pParse
->constraintName
.n
){
1378 sqlite3ExprListSetName(pParse
, pTab
->pCheck
, &pParse
->constraintName
, 1);
1383 sqlite3ExprDelete(pParse
->db
, pCheckExpr
);
1388 ** Set the collation function of the most recently parsed table column
1389 ** to the CollSeq given.
1391 void sqlite3AddCollateType(Parse
*pParse
, Token
*pToken
){
1394 char *zColl
; /* Dequoted name of collation sequence */
1397 if( (p
= pParse
->pNewTable
)==0 ) return;
1400 zColl
= sqlite3NameFromToken(db
, pToken
);
1401 if( !zColl
) return;
1403 if( sqlite3LocateCollSeq(pParse
, zColl
) ){
1405 sqlite3DbFree(db
, p
->aCol
[i
].zColl
);
1406 p
->aCol
[i
].zColl
= zColl
;
1408 /* If the column is declared as "<name> PRIMARY KEY COLLATE <type>",
1409 ** then an index may have been created on this column before the
1410 ** collation type was added. Correct this if it is the case.
1412 for(pIdx
=p
->pIndex
; pIdx
; pIdx
=pIdx
->pNext
){
1413 assert( pIdx
->nKeyCol
==1 );
1414 if( pIdx
->aiColumn
[0]==i
){
1415 pIdx
->azColl
[0] = p
->aCol
[i
].zColl
;
1419 sqlite3DbFree(db
, zColl
);
1424 ** This function returns the collation sequence for database native text
1425 ** encoding identified by the string zName, length nName.
1427 ** If the requested collation sequence is not available, or not available
1428 ** in the database native encoding, the collation factory is invoked to
1429 ** request it. If the collation factory does not supply such a sequence,
1430 ** and the sequence is available in another text encoding, then that is
1431 ** returned instead.
1433 ** If no versions of the requested collations sequence are available, or
1434 ** another error occurs, NULL is returned and an error message written into
1437 ** This routine is a wrapper around sqlite3FindCollSeq(). This routine
1438 ** invokes the collation factory if the named collation cannot be found
1439 ** and generates an error message.
1441 ** See also: sqlite3FindCollSeq(), sqlite3GetCollSeq()
1443 CollSeq
*sqlite3LocateCollSeq(Parse
*pParse
, const char *zName
){
1444 sqlite3
*db
= pParse
->db
;
1446 u8 initbusy
= db
->init
.busy
;
1449 pColl
= sqlite3FindCollSeq(db
, enc
, zName
, initbusy
);
1450 if( !initbusy
&& (!pColl
|| !pColl
->xCmp
) ){
1451 pColl
= sqlite3GetCollSeq(pParse
, enc
, pColl
, zName
);
1459 ** Generate code that will increment the schema cookie.
1461 ** The schema cookie is used to determine when the schema for the
1462 ** database changes. After each schema change, the cookie value
1463 ** changes. When a process first reads the schema it records the
1464 ** cookie. Thereafter, whenever it goes to access the database,
1465 ** it checks the cookie to make sure the schema has not changed
1466 ** since it was last read.
1468 ** This plan is not completely bullet-proof. It is possible for
1469 ** the schema to change multiple times and for the cookie to be
1470 ** set back to prior value. But schema changes are infrequent
1471 ** and the probability of hitting the same cookie value is only
1472 ** 1 chance in 2^32. So we're safe enough.
1474 ** IMPLEMENTATION-OF: R-34230-56049 SQLite automatically increments
1475 ** the schema-version whenever the schema changes.
1477 void sqlite3ChangeCookie(Parse
*pParse
, int iDb
){
1478 sqlite3
*db
= pParse
->db
;
1479 Vdbe
*v
= pParse
->pVdbe
;
1480 assert( sqlite3SchemaMutexHeld(db
, iDb
, 0) );
1481 sqlite3VdbeAddOp3(v
, OP_SetCookie
, iDb
, BTREE_SCHEMA_VERSION
,
1482 db
->aDb
[iDb
].pSchema
->schema_cookie
+1);
1486 ** Measure the number of characters needed to output the given
1487 ** identifier. The number returned includes any quotes used
1488 ** but does not include the null terminator.
1490 ** The estimate is conservative. It might be larger that what is
1493 static int identLength(const char *z
){
1495 for(n
=0; *z
; n
++, z
++){
1496 if( *z
=='"' ){ n
++; }
1502 ** The first parameter is a pointer to an output buffer. The second
1503 ** parameter is a pointer to an integer that contains the offset at
1504 ** which to write into the output buffer. This function copies the
1505 ** nul-terminated string pointed to by the third parameter, zSignedIdent,
1506 ** to the specified offset in the buffer and updates *pIdx to refer
1507 ** to the first byte after the last byte written before returning.
1509 ** If the string zSignedIdent consists entirely of alpha-numeric
1510 ** characters, does not begin with a digit and is not an SQL keyword,
1511 ** then it is copied to the output buffer exactly as it is. Otherwise,
1512 ** it is quoted using double-quotes.
1514 static void identPut(char *z
, int *pIdx
, char *zSignedIdent
){
1515 unsigned char *zIdent
= (unsigned char*)zSignedIdent
;
1516 int i
, j
, needQuote
;
1519 for(j
=0; zIdent
[j
]; j
++){
1520 if( !sqlite3Isalnum(zIdent
[j
]) && zIdent
[j
]!='_' ) break;
1522 needQuote
= sqlite3Isdigit(zIdent
[0])
1523 || sqlite3KeywordCode(zIdent
, j
)!=TK_ID
1527 if( needQuote
) z
[i
++] = '"';
1528 for(j
=0; zIdent
[j
]; j
++){
1530 if( zIdent
[j
]=='"' ) z
[i
++] = '"';
1532 if( needQuote
) z
[i
++] = '"';
1538 ** Generate a CREATE TABLE statement appropriate for the given
1539 ** table. Memory to hold the text of the statement is obtained
1540 ** from sqliteMalloc() and must be freed by the calling function.
1542 static char *createTableStmt(sqlite3
*db
, Table
*p
){
1545 char *zSep
, *zSep2
, *zEnd
;
1548 for(pCol
= p
->aCol
, i
=0; i
<p
->nCol
; i
++, pCol
++){
1549 n
+= identLength(pCol
->zName
) + 5;
1551 n
+= identLength(p
->zName
);
1561 n
+= 35 + 6*p
->nCol
;
1562 zStmt
= sqlite3DbMallocRaw(0, n
);
1564 sqlite3OomFault(db
);
1567 sqlite3_snprintf(n
, zStmt
, "CREATE TABLE ");
1568 k
= sqlite3Strlen30(zStmt
);
1569 identPut(zStmt
, &k
, p
->zName
);
1571 for(pCol
=p
->aCol
, i
=0; i
<p
->nCol
; i
++, pCol
++){
1572 static const char * const azType
[] = {
1573 /* SQLITE_AFF_BLOB */ "",
1574 /* SQLITE_AFF_TEXT */ " TEXT",
1575 /* SQLITE_AFF_NUMERIC */ " NUM",
1576 /* SQLITE_AFF_INTEGER */ " INT",
1577 /* SQLITE_AFF_REAL */ " REAL"
1582 sqlite3_snprintf(n
-k
, &zStmt
[k
], zSep
);
1583 k
+= sqlite3Strlen30(&zStmt
[k
]);
1585 identPut(zStmt
, &k
, pCol
->zName
);
1586 assert( pCol
->affinity
-SQLITE_AFF_BLOB
>= 0 );
1587 assert( pCol
->affinity
-SQLITE_AFF_BLOB
< ArraySize(azType
) );
1588 testcase( pCol
->affinity
==SQLITE_AFF_BLOB
);
1589 testcase( pCol
->affinity
==SQLITE_AFF_TEXT
);
1590 testcase( pCol
->affinity
==SQLITE_AFF_NUMERIC
);
1591 testcase( pCol
->affinity
==SQLITE_AFF_INTEGER
);
1592 testcase( pCol
->affinity
==SQLITE_AFF_REAL
);
1594 zType
= azType
[pCol
->affinity
- SQLITE_AFF_BLOB
];
1595 len
= sqlite3Strlen30(zType
);
1596 assert( pCol
->affinity
==SQLITE_AFF_BLOB
1597 || pCol
->affinity
==sqlite3AffinityType(zType
, 0) );
1598 memcpy(&zStmt
[k
], zType
, len
);
1602 sqlite3_snprintf(n
-k
, &zStmt
[k
], "%s", zEnd
);
1607 ** Resize an Index object to hold N columns total. Return SQLITE_OK
1608 ** on success and SQLITE_NOMEM on an OOM error.
1610 static int resizeIndexObject(sqlite3
*db
, Index
*pIdx
, int N
){
1613 if( pIdx
->nColumn
>=N
) return SQLITE_OK
;
1614 assert( pIdx
->isResized
==0 );
1615 nByte
= (sizeof(char*) + sizeof(i16
) + 1)*N
;
1616 zExtra
= sqlite3DbMallocZero(db
, nByte
);
1617 if( zExtra
==0 ) return SQLITE_NOMEM_BKPT
;
1618 memcpy(zExtra
, pIdx
->azColl
, sizeof(char*)*pIdx
->nColumn
);
1619 pIdx
->azColl
= (const char**)zExtra
;
1620 zExtra
+= sizeof(char*)*N
;
1621 memcpy(zExtra
, pIdx
->aiColumn
, sizeof(i16
)*pIdx
->nColumn
);
1622 pIdx
->aiColumn
= (i16
*)zExtra
;
1623 zExtra
+= sizeof(i16
)*N
;
1624 memcpy(zExtra
, pIdx
->aSortOrder
, pIdx
->nColumn
);
1625 pIdx
->aSortOrder
= (u8
*)zExtra
;
1627 pIdx
->isResized
= 1;
1632 ** Estimate the total row width for a table.
1634 static void estimateTableWidth(Table
*pTab
){
1635 unsigned wTable
= 0;
1636 const Column
*pTabCol
;
1638 for(i
=pTab
->nCol
, pTabCol
=pTab
->aCol
; i
>0; i
--, pTabCol
++){
1639 wTable
+= pTabCol
->szEst
;
1641 if( pTab
->iPKey
<0 ) wTable
++;
1642 pTab
->szTabRow
= sqlite3LogEst(wTable
*4);
1646 ** Estimate the average size of a row for an index.
1648 static void estimateIndexWidth(Index
*pIdx
){
1649 unsigned wIndex
= 0;
1651 const Column
*aCol
= pIdx
->pTable
->aCol
;
1652 for(i
=0; i
<pIdx
->nColumn
; i
++){
1653 i16 x
= pIdx
->aiColumn
[i
];
1654 assert( x
<pIdx
->pTable
->nCol
);
1655 wIndex
+= x
<0 ? 1 : aCol
[pIdx
->aiColumn
[i
]].szEst
;
1657 pIdx
->szIdxRow
= sqlite3LogEst(wIndex
*4);
1660 /* Return true if value x is found any of the first nCol entries of aiCol[]
1662 static int hasColumn(const i16
*aiCol
, int nCol
, int x
){
1663 while( nCol
-- > 0 ) if( x
==*(aiCol
++) ) return 1;
1668 ** This routine runs at the end of parsing a CREATE TABLE statement that
1669 ** has a WITHOUT ROWID clause. The job of this routine is to convert both
1670 ** internal schema data structures and the generated VDBE code so that they
1671 ** are appropriate for a WITHOUT ROWID table instead of a rowid table.
1674 ** (1) Set all columns of the PRIMARY KEY schema object to be NOT NULL.
1675 ** (2) Convert P3 parameter of the OP_CreateBtree from BTREE_INTKEY
1676 ** into BTREE_BLOBKEY.
1677 ** (3) Bypass the creation of the sqlite_master table entry
1678 ** for the PRIMARY KEY as the primary key index is now
1679 ** identified by the sqlite_master table entry of the table itself.
1680 ** (4) Set the Index.tnum of the PRIMARY KEY Index object in the
1681 ** schema to the rootpage from the main table.
1682 ** (5) Add all table columns to the PRIMARY KEY Index object
1683 ** so that the PRIMARY KEY is a covering index. The surplus
1684 ** columns are part of KeyInfo.nAllField and are not used for
1685 ** sorting or lookup or uniqueness checks.
1686 ** (6) Replace the rowid tail on all automatically generated UNIQUE
1687 ** indices with the PRIMARY KEY columns.
1689 ** For virtual tables, only (1) is performed.
1691 static void convertToWithoutRowidTable(Parse
*pParse
, Table
*pTab
){
1696 sqlite3
*db
= pParse
->db
;
1697 Vdbe
*v
= pParse
->pVdbe
;
1699 /* Mark every PRIMARY KEY column as NOT NULL (except for imposter tables)
1701 if( !db
->init
.imposterTable
){
1702 for(i
=0; i
<pTab
->nCol
; i
++){
1703 if( (pTab
->aCol
[i
].colFlags
& COLFLAG_PRIMKEY
)!=0 ){
1704 pTab
->aCol
[i
].notNull
= OE_Abort
;
1709 /* The remaining transformations only apply to b-tree tables, not to
1710 ** virtual tables */
1711 if( IN_DECLARE_VTAB
) return;
1713 /* Convert the P3 operand of the OP_CreateBtree opcode from BTREE_INTKEY
1714 ** into BTREE_BLOBKEY.
1716 if( pParse
->addrCrTab
){
1718 sqlite3VdbeChangeP3(v
, pParse
->addrCrTab
, BTREE_BLOBKEY
);
1721 /* Locate the PRIMARY KEY index. Or, if this table was originally
1722 ** an INTEGER PRIMARY KEY table, create a new PRIMARY KEY index.
1724 if( pTab
->iPKey
>=0 ){
1727 sqlite3TokenInit(&ipkToken
, pTab
->aCol
[pTab
->iPKey
].zName
);
1728 pList
= sqlite3ExprListAppend(pParse
, 0,
1729 sqlite3ExprAlloc(db
, TK_ID
, &ipkToken
, 0));
1730 if( pList
==0 ) return;
1731 pList
->a
[0].sortOrder
= pParse
->iPkSortOrder
;
1732 assert( pParse
->pNewTable
==pTab
);
1733 sqlite3CreateIndex(pParse
, 0, 0, 0, pList
, pTab
->keyConf
, 0, 0, 0, 0,
1734 SQLITE_IDXTYPE_PRIMARYKEY
);
1735 if( db
->mallocFailed
) return;
1736 pPk
= sqlite3PrimaryKeyIndex(pTab
);
1739 pPk
= sqlite3PrimaryKeyIndex(pTab
);
1742 ** Remove all redundant columns from the PRIMARY KEY. For example, change
1743 ** "PRIMARY KEY(a,b,a,b,c,b,c,d)" into just "PRIMARY KEY(a,b,c,d)". Later
1744 ** code assumes the PRIMARY KEY contains no repeated columns.
1746 for(i
=j
=1; i
<pPk
->nKeyCol
; i
++){
1747 if( hasColumn(pPk
->aiColumn
, j
, pPk
->aiColumn
[i
]) ){
1750 pPk
->aiColumn
[j
++] = pPk
->aiColumn
[i
];
1756 pPk
->isCovering
= 1;
1757 if( !db
->init
.imposterTable
) pPk
->uniqNotNull
= 1;
1760 /* Bypass the creation of the PRIMARY KEY btree and the sqlite_master
1761 ** table entry. This is only required if currently generating VDBE
1762 ** code for a CREATE TABLE (not when parsing one as part of reading
1763 ** a database schema). */
1764 if( v
&& pPk
->tnum
>0 ){
1765 assert( db
->init
.busy
==0 );
1766 sqlite3VdbeChangeOpcode(v
, pPk
->tnum
, OP_Goto
);
1769 /* The root page of the PRIMARY KEY is the table root page */
1770 pPk
->tnum
= pTab
->tnum
;
1772 /* Update the in-memory representation of all UNIQUE indices by converting
1773 ** the final rowid column into one or more columns of the PRIMARY KEY.
1775 for(pIdx
=pTab
->pIndex
; pIdx
; pIdx
=pIdx
->pNext
){
1777 if( IsPrimaryKeyIndex(pIdx
) ) continue;
1778 for(i
=n
=0; i
<nPk
; i
++){
1779 if( !hasColumn(pIdx
->aiColumn
, pIdx
->nKeyCol
, pPk
->aiColumn
[i
]) ) n
++;
1782 /* This index is a superset of the primary key */
1783 pIdx
->nColumn
= pIdx
->nKeyCol
;
1786 if( resizeIndexObject(db
, pIdx
, pIdx
->nKeyCol
+n
) ) return;
1787 for(i
=0, j
=pIdx
->nKeyCol
; i
<nPk
; i
++){
1788 if( !hasColumn(pIdx
->aiColumn
, pIdx
->nKeyCol
, pPk
->aiColumn
[i
]) ){
1789 pIdx
->aiColumn
[j
] = pPk
->aiColumn
[i
];
1790 pIdx
->azColl
[j
] = pPk
->azColl
[i
];
1794 assert( pIdx
->nColumn
>=pIdx
->nKeyCol
+n
);
1795 assert( pIdx
->nColumn
>=j
);
1798 /* Add all table columns to the PRIMARY KEY index
1800 if( nPk
<pTab
->nCol
){
1801 if( resizeIndexObject(db
, pPk
, pTab
->nCol
) ) return;
1802 for(i
=0, j
=nPk
; i
<pTab
->nCol
; i
++){
1803 if( !hasColumn(pPk
->aiColumn
, j
, i
) ){
1804 assert( j
<pPk
->nColumn
);
1805 pPk
->aiColumn
[j
] = i
;
1806 pPk
->azColl
[j
] = sqlite3StrBINARY
;
1810 assert( pPk
->nColumn
==j
);
1811 assert( pTab
->nCol
==j
);
1813 pPk
->nColumn
= pTab
->nCol
;
1818 ** This routine is called to report the final ")" that terminates
1819 ** a CREATE TABLE statement.
1821 ** The table structure that other action routines have been building
1822 ** is added to the internal hash tables, assuming no errors have
1825 ** An entry for the table is made in the master table on disk, unless
1826 ** this is a temporary table or db->init.busy==1. When db->init.busy==1
1827 ** it means we are reading the sqlite_master table because we just
1828 ** connected to the database or because the sqlite_master table has
1829 ** recently changed, so the entry for this table already exists in
1830 ** the sqlite_master table. We do not want to create it again.
1832 ** If the pSelect argument is not NULL, it means that this routine
1833 ** was called to create a table generated from a
1834 ** "CREATE TABLE ... AS SELECT ..." statement. The column names of
1835 ** the new table will match the result set of the SELECT.
1837 void sqlite3EndTable(
1838 Parse
*pParse
, /* Parse context */
1839 Token
*pCons
, /* The ',' token after the last column defn. */
1840 Token
*pEnd
, /* The ')' before options in the CREATE TABLE */
1841 u8 tabOpts
, /* Extra table options. Usually 0. */
1842 Select
*pSelect
/* Select from a "CREATE ... AS SELECT" */
1844 Table
*p
; /* The new table */
1845 sqlite3
*db
= pParse
->db
; /* The database connection */
1846 int iDb
; /* Database in which the table lives */
1847 Index
*pIdx
; /* An implied index of the table */
1849 if( pEnd
==0 && pSelect
==0 ){
1852 assert( !db
->mallocFailed
);
1853 p
= pParse
->pNewTable
;
1856 assert( !db
->init
.busy
|| !pSelect
);
1858 /* If the db->init.busy is 1 it means we are reading the SQL off the
1859 ** "sqlite_master" or "sqlite_temp_master" table on the disk.
1860 ** So do not write to the disk again. Extract the root page number
1861 ** for the table from the db->init.newTnum field. (The page number
1862 ** should have been put there by the sqliteOpenCb routine.)
1864 ** If the root page number is 1, that means this is the sqlite_master
1865 ** table itself. So mark it read-only.
1867 if( db
->init
.busy
){
1868 p
->tnum
= db
->init
.newTnum
;
1869 if( p
->tnum
==1 ) p
->tabFlags
|= TF_Readonly
;
1872 /* Special processing for WITHOUT ROWID Tables */
1873 if( tabOpts
& TF_WithoutRowid
){
1874 if( (p
->tabFlags
& TF_Autoincrement
) ){
1875 sqlite3ErrorMsg(pParse
,
1876 "AUTOINCREMENT not allowed on WITHOUT ROWID tables");
1879 if( (p
->tabFlags
& TF_HasPrimaryKey
)==0 ){
1880 sqlite3ErrorMsg(pParse
, "PRIMARY KEY missing on table %s", p
->zName
);
1882 p
->tabFlags
|= TF_WithoutRowid
| TF_NoVisibleRowid
;
1883 convertToWithoutRowidTable(pParse
, p
);
1887 iDb
= sqlite3SchemaToIndex(db
, p
->pSchema
);
1889 #ifndef SQLITE_OMIT_CHECK
1890 /* Resolve names in all CHECK constraint expressions.
1893 sqlite3ResolveSelfReference(pParse
, p
, NC_IsCheck
, 0, p
->pCheck
);
1895 #endif /* !defined(SQLITE_OMIT_CHECK) */
1897 /* Estimate the average row size for the table and for all implied indices */
1898 estimateTableWidth(p
);
1899 for(pIdx
=p
->pIndex
; pIdx
; pIdx
=pIdx
->pNext
){
1900 estimateIndexWidth(pIdx
);
1903 /* If not initializing, then create a record for the new table
1904 ** in the SQLITE_MASTER table of the database.
1906 ** If this is a TEMPORARY table, write the entry into the auxiliary
1907 ** file instead of into the main database file.
1909 if( !db
->init
.busy
){
1912 char *zType
; /* "view" or "table" */
1913 char *zType2
; /* "VIEW" or "TABLE" */
1914 char *zStmt
; /* Text of the CREATE TABLE or CREATE VIEW statement */
1916 v
= sqlite3GetVdbe(pParse
);
1917 if( NEVER(v
==0) ) return;
1919 sqlite3VdbeAddOp1(v
, OP_Close
, 0);
1922 ** Initialize zType for the new view or table.
1924 if( p
->pSelect
==0 ){
1925 /* A regular table */
1928 #ifndef SQLITE_OMIT_VIEW
1936 /* If this is a CREATE TABLE xx AS SELECT ..., execute the SELECT
1937 ** statement to populate the new table. The root-page number for the
1938 ** new table is in register pParse->regRoot.
1940 ** Once the SELECT has been coded by sqlite3Select(), it is in a
1941 ** suitable state to query for the column names and types to be used
1942 ** by the new table.
1944 ** A shared-cache write-lock is not required to write to the new table,
1945 ** as a schema-lock must have already been obtained to create it. Since
1946 ** a schema-lock excludes all other database users, the write-lock would
1950 SelectDest dest
; /* Where the SELECT should store results */
1951 int regYield
; /* Register holding co-routine entry-point */
1952 int addrTop
; /* Top of the co-routine */
1953 int regRec
; /* A record to be insert into the new table */
1954 int regRowid
; /* Rowid of the next row to insert */
1955 int addrInsLoop
; /* Top of the loop for inserting rows */
1956 Table
*pSelTab
; /* A table that describes the SELECT results */
1958 regYield
= ++pParse
->nMem
;
1959 regRec
= ++pParse
->nMem
;
1960 regRowid
= ++pParse
->nMem
;
1961 assert(pParse
->nTab
==1);
1962 sqlite3MayAbort(pParse
);
1963 sqlite3VdbeAddOp3(v
, OP_OpenWrite
, 1, pParse
->regRoot
, iDb
);
1964 sqlite3VdbeChangeP5(v
, OPFLAG_P2ISREG
);
1966 addrTop
= sqlite3VdbeCurrentAddr(v
) + 1;
1967 sqlite3VdbeAddOp3(v
, OP_InitCoroutine
, regYield
, 0, addrTop
);
1968 sqlite3SelectDestInit(&dest
, SRT_Coroutine
, regYield
);
1969 sqlite3Select(pParse
, pSelect
, &dest
);
1970 sqlite3VdbeEndCoroutine(v
, regYield
);
1971 sqlite3VdbeJumpHere(v
, addrTop
- 1);
1972 if( pParse
->nErr
) return;
1973 pSelTab
= sqlite3ResultSetOfSelect(pParse
, pSelect
);
1974 if( pSelTab
==0 ) return;
1975 assert( p
->aCol
==0 );
1976 p
->nCol
= pSelTab
->nCol
;
1977 p
->aCol
= pSelTab
->aCol
;
1980 sqlite3DeleteTable(db
, pSelTab
);
1981 addrInsLoop
= sqlite3VdbeAddOp1(v
, OP_Yield
, dest
.iSDParm
);
1983 sqlite3VdbeAddOp3(v
, OP_MakeRecord
, dest
.iSdst
, dest
.nSdst
, regRec
);
1984 sqlite3TableAffinity(v
, p
, 0);
1985 sqlite3VdbeAddOp2(v
, OP_NewRowid
, 1, regRowid
);
1986 sqlite3VdbeAddOp3(v
, OP_Insert
, 1, regRec
, regRowid
);
1987 sqlite3VdbeGoto(v
, addrInsLoop
);
1988 sqlite3VdbeJumpHere(v
, addrInsLoop
);
1989 sqlite3VdbeAddOp1(v
, OP_Close
, 1);
1992 /* Compute the complete text of the CREATE statement */
1994 zStmt
= createTableStmt(db
, p
);
1996 Token
*pEnd2
= tabOpts
? &pParse
->sLastToken
: pEnd
;
1997 n
= (int)(pEnd2
->z
- pParse
->sNameToken
.z
);
1998 if( pEnd2
->z
[0]!=';' ) n
+= pEnd2
->n
;
1999 zStmt
= sqlite3MPrintf(db
,
2000 "CREATE %s %.*s", zType2
, n
, pParse
->sNameToken
.z
2004 /* A slot for the record has already been allocated in the
2005 ** SQLITE_MASTER table. We just need to update that slot with all
2006 ** the information we've collected.
2008 sqlite3NestedParse(pParse
,
2010 "SET type='%s', name=%Q, tbl_name=%Q, rootpage=#%d, sql=%Q "
2012 db
->aDb
[iDb
].zDbSName
, MASTER_NAME
,
2020 sqlite3DbFree(db
, zStmt
);
2021 sqlite3ChangeCookie(pParse
, iDb
);
2023 #ifndef SQLITE_OMIT_AUTOINCREMENT
2024 /* Check to see if we need to create an sqlite_sequence table for
2025 ** keeping track of autoincrement keys.
2027 if( (p
->tabFlags
& TF_Autoincrement
)!=0 ){
2028 Db
*pDb
= &db
->aDb
[iDb
];
2029 assert( sqlite3SchemaMutexHeld(db
, iDb
, 0) );
2030 if( pDb
->pSchema
->pSeqTab
==0 ){
2031 sqlite3NestedParse(pParse
,
2032 "CREATE TABLE %Q.sqlite_sequence(name,seq)",
2039 /* Reparse everything to update our internal data structures */
2040 sqlite3VdbeAddParseSchemaOp(v
, iDb
,
2041 sqlite3MPrintf(db
, "tbl_name='%q' AND type!='trigger'", p
->zName
));
2045 /* Add the table to the in-memory representation of the database.
2047 if( db
->init
.busy
){
2049 Schema
*pSchema
= p
->pSchema
;
2050 assert( sqlite3SchemaMutexHeld(db
, iDb
, 0) );
2051 pOld
= sqlite3HashInsert(&pSchema
->tblHash
, p
->zName
, p
);
2053 assert( p
==pOld
); /* Malloc must have failed inside HashInsert() */
2054 sqlite3OomFault(db
);
2057 pParse
->pNewTable
= 0;
2058 db
->mDbFlags
|= DBFLAG_SchemaChange
;
2060 #ifndef SQLITE_OMIT_ALTERTABLE
2062 const char *zName
= (const char *)pParse
->sNameToken
.z
;
2064 assert( !pSelect
&& pCons
&& pEnd
);
2068 nName
= (int)((const char *)pCons
->z
- zName
);
2069 p
->addColOffset
= 13 + sqlite3Utf8CharLen(zName
, nName
);
2075 #ifndef SQLITE_OMIT_VIEW
2077 ** The parser calls this routine in order to create a new VIEW
2079 void sqlite3CreateView(
2080 Parse
*pParse
, /* The parsing context */
2081 Token
*pBegin
, /* The CREATE token that begins the statement */
2082 Token
*pName1
, /* The token that holds the name of the view */
2083 Token
*pName2
, /* The token that holds the name of the view */
2084 ExprList
*pCNames
, /* Optional list of view column names */
2085 Select
*pSelect
, /* A SELECT statement that will become the new view */
2086 int isTemp
, /* TRUE for a TEMPORARY view */
2087 int noErr
/* Suppress error messages if VIEW already exists */
2096 sqlite3
*db
= pParse
->db
;
2098 if( pParse
->nVar
>0 ){
2099 sqlite3ErrorMsg(pParse
, "parameters are not allowed in views");
2100 goto create_view_fail
;
2102 sqlite3StartTable(pParse
, pName1
, pName2
, isTemp
, 1, 0, noErr
);
2103 p
= pParse
->pNewTable
;
2104 if( p
==0 || pParse
->nErr
) goto create_view_fail
;
2105 sqlite3TwoPartName(pParse
, pName1
, pName2
, &pName
);
2106 iDb
= sqlite3SchemaToIndex(db
, p
->pSchema
);
2107 sqlite3FixInit(&sFix
, pParse
, iDb
, "view", pName
);
2108 if( sqlite3FixSelect(&sFix
, pSelect
) ) goto create_view_fail
;
2110 /* Make a copy of the entire SELECT statement that defines the view.
2111 ** This will force all the Expr.token.z values to be dynamically
2112 ** allocated rather than point to the input string - which means that
2113 ** they will persist after the current sqlite3_exec() call returns.
2115 p
->pSelect
= sqlite3SelectDup(db
, pSelect
, EXPRDUP_REDUCE
);
2116 p
->pCheck
= sqlite3ExprListDup(db
, pCNames
, EXPRDUP_REDUCE
);
2117 if( db
->mallocFailed
) goto create_view_fail
;
2119 /* Locate the end of the CREATE VIEW statement. Make sEnd point to
2122 sEnd
= pParse
->sLastToken
;
2123 assert( sEnd
.z
[0]!=0 );
2124 if( sEnd
.z
[0]!=';' ){
2128 n
= (int)(sEnd
.z
- pBegin
->z
);
2131 while( sqlite3Isspace(z
[n
-1]) ){ n
--; }
2135 /* Use sqlite3EndTable() to add the view to the SQLITE_MASTER table */
2136 sqlite3EndTable(pParse
, 0, &sEnd
, 0, 0);
2139 sqlite3SelectDelete(db
, pSelect
);
2140 sqlite3ExprListDelete(db
, pCNames
);
2143 #endif /* SQLITE_OMIT_VIEW */
2145 #if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
2147 ** The Table structure pTable is really a VIEW. Fill in the names of
2148 ** the columns of the view in the pTable structure. Return the number
2149 ** of errors. If an error is seen leave an error message in pParse->zErrMsg.
2151 int sqlite3ViewGetColumnNames(Parse
*pParse
, Table
*pTable
){
2152 Table
*pSelTab
; /* A fake table from which we get the result set */
2153 Select
*pSel
; /* Copy of the SELECT that implements the view */
2154 int nErr
= 0; /* Number of errors encountered */
2155 int n
; /* Temporarily holds the number of cursors assigned */
2156 sqlite3
*db
= pParse
->db
; /* Database connection for malloc errors */
2157 #ifndef SQLITE_OMIT_VIRTUALTABLE
2160 #ifndef SQLITE_OMIT_AUTHORIZATION
2161 sqlite3_xauth xAuth
; /* Saved xAuth pointer */
2166 #ifndef SQLITE_OMIT_VIRTUALTABLE
2168 rc
= sqlite3VtabCallConnect(pParse
, pTable
);
2173 if( IsVirtual(pTable
) ) return 0;
2176 #ifndef SQLITE_OMIT_VIEW
2177 /* A positive nCol means the columns names for this view are
2180 if( pTable
->nCol
>0 ) return 0;
2182 /* A negative nCol is a special marker meaning that we are currently
2183 ** trying to compute the column names. If we enter this routine with
2184 ** a negative nCol, it means two or more views form a loop, like this:
2186 ** CREATE VIEW one AS SELECT * FROM two;
2187 ** CREATE VIEW two AS SELECT * FROM one;
2189 ** Actually, the error above is now caught prior to reaching this point.
2190 ** But the following test is still important as it does come up
2191 ** in the following:
2193 ** CREATE TABLE main.ex1(a);
2194 ** CREATE TEMP VIEW ex1 AS SELECT a FROM ex1;
2195 ** SELECT * FROM temp.ex1;
2197 if( pTable
->nCol
<0 ){
2198 sqlite3ErrorMsg(pParse
, "view %s is circularly defined", pTable
->zName
);
2201 assert( pTable
->nCol
>=0 );
2203 /* If we get this far, it means we need to compute the table names.
2204 ** Note that the call to sqlite3ResultSetOfSelect() will expand any
2205 ** "*" elements in the results set of the view and will assign cursors
2206 ** to the elements of the FROM clause. But we do not want these changes
2207 ** to be permanent. So the computation is done on a copy of the SELECT
2208 ** statement that defines the view.
2210 assert( pTable
->pSelect
);
2211 pSel
= sqlite3SelectDup(db
, pTable
->pSelect
, 0);
2214 sqlite3SrcListAssignCursors(pParse
, pSel
->pSrc
);
2216 db
->lookaside
.bDisable
++;
2217 #ifndef SQLITE_OMIT_AUTHORIZATION
2220 pSelTab
= sqlite3ResultSetOfSelect(pParse
, pSel
);
2223 pSelTab
= sqlite3ResultSetOfSelect(pParse
, pSel
);
2226 if( pTable
->pCheck
){
2227 /* CREATE VIEW name(arglist) AS ...
2228 ** The names of the columns in the table are taken from
2229 ** arglist which is stored in pTable->pCheck. The pCheck field
2230 ** normally holds CHECK constraints on an ordinary table, but for
2231 ** a VIEW it holds the list of column names.
2233 sqlite3ColumnsFromExprList(pParse
, pTable
->pCheck
,
2234 &pTable
->nCol
, &pTable
->aCol
);
2235 if( db
->mallocFailed
==0
2237 && pTable
->nCol
==pSel
->pEList
->nExpr
2239 sqlite3SelectAddColumnTypeAndCollation(pParse
, pTable
, pSel
);
2241 }else if( pSelTab
){
2242 /* CREATE VIEW name AS... without an argument list. Construct
2243 ** the column names from the SELECT statement that defines the view.
2245 assert( pTable
->aCol
==0 );
2246 pTable
->nCol
= pSelTab
->nCol
;
2247 pTable
->aCol
= pSelTab
->aCol
;
2250 assert( sqlite3SchemaMutexHeld(db
, 0, pTable
->pSchema
) );
2255 sqlite3DeleteTable(db
, pSelTab
);
2256 sqlite3SelectDelete(db
, pSel
);
2257 db
->lookaside
.bDisable
--;
2261 pTable
->pSchema
->schemaFlags
|= DB_UnresetViews
;
2262 #endif /* SQLITE_OMIT_VIEW */
2265 #endif /* !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE) */
2267 #ifndef SQLITE_OMIT_VIEW
2269 ** Clear the column names from every VIEW in database idx.
2271 static void sqliteViewResetAll(sqlite3
*db
, int idx
){
2273 assert( sqlite3SchemaMutexHeld(db
, idx
, 0) );
2274 if( !DbHasProperty(db
, idx
, DB_UnresetViews
) ) return;
2275 for(i
=sqliteHashFirst(&db
->aDb
[idx
].pSchema
->tblHash
); i
;i
=sqliteHashNext(i
)){
2276 Table
*pTab
= sqliteHashData(i
);
2277 if( pTab
->pSelect
){
2278 sqlite3DeleteColumnNames(db
, pTab
);
2283 DbClearProperty(db
, idx
, DB_UnresetViews
);
2286 # define sqliteViewResetAll(A,B)
2287 #endif /* SQLITE_OMIT_VIEW */
2290 ** This function is called by the VDBE to adjust the internal schema
2291 ** used by SQLite when the btree layer moves a table root page. The
2292 ** root-page of a table or index in database iDb has changed from iFrom
2295 ** Ticket #1728: The symbol table might still contain information
2296 ** on tables and/or indices that are the process of being deleted.
2297 ** If you are unlucky, one of those deleted indices or tables might
2298 ** have the same rootpage number as the real table or index that is
2299 ** being moved. So we cannot stop searching after the first match
2300 ** because the first match might be for one of the deleted indices
2301 ** or tables and not the table/index that is actually being moved.
2302 ** We must continue looping until all tables and indices with
2303 ** rootpage==iFrom have been converted to have a rootpage of iTo
2304 ** in order to be certain that we got the right one.
2306 #ifndef SQLITE_OMIT_AUTOVACUUM
2307 void sqlite3RootPageMoved(sqlite3
*db
, int iDb
, int iFrom
, int iTo
){
2312 assert( sqlite3SchemaMutexHeld(db
, iDb
, 0) );
2313 pDb
= &db
->aDb
[iDb
];
2314 pHash
= &pDb
->pSchema
->tblHash
;
2315 for(pElem
=sqliteHashFirst(pHash
); pElem
; pElem
=sqliteHashNext(pElem
)){
2316 Table
*pTab
= sqliteHashData(pElem
);
2317 if( pTab
->tnum
==iFrom
){
2321 pHash
= &pDb
->pSchema
->idxHash
;
2322 for(pElem
=sqliteHashFirst(pHash
); pElem
; pElem
=sqliteHashNext(pElem
)){
2323 Index
*pIdx
= sqliteHashData(pElem
);
2324 if( pIdx
->tnum
==iFrom
){
2332 ** Write code to erase the table with root-page iTable from database iDb.
2333 ** Also write code to modify the sqlite_master table and internal schema
2334 ** if a root-page of another table is moved by the btree-layer whilst
2335 ** erasing iTable (this can happen with an auto-vacuum database).
2337 static void destroyRootPage(Parse
*pParse
, int iTable
, int iDb
){
2338 Vdbe
*v
= sqlite3GetVdbe(pParse
);
2339 int r1
= sqlite3GetTempReg(pParse
);
2341 sqlite3VdbeAddOp3(v
, OP_Destroy
, iTable
, r1
, iDb
);
2342 sqlite3MayAbort(pParse
);
2343 #ifndef SQLITE_OMIT_AUTOVACUUM
2344 /* OP_Destroy stores an in integer r1. If this integer
2345 ** is non-zero, then it is the root page number of a table moved to
2346 ** location iTable. The following code modifies the sqlite_master table to
2349 ** The "#NNN" in the SQL is a special constant that means whatever value
2350 ** is in register NNN. See grammar rules associated with the TK_REGISTER
2351 ** token for additional information.
2353 sqlite3NestedParse(pParse
,
2354 "UPDATE %Q.%s SET rootpage=%d WHERE #%d AND rootpage=#%d",
2355 pParse
->db
->aDb
[iDb
].zDbSName
, MASTER_NAME
, iTable
, r1
, r1
);
2357 sqlite3ReleaseTempReg(pParse
, r1
);
2361 ** Write VDBE code to erase table pTab and all associated indices on disk.
2362 ** Code to update the sqlite_master tables and internal schema definitions
2363 ** in case a root-page belonging to another table is moved by the btree layer
2364 ** is also added (this can happen with an auto-vacuum database).
2366 static void destroyTable(Parse
*pParse
, Table
*pTab
){
2367 /* If the database may be auto-vacuum capable (if SQLITE_OMIT_AUTOVACUUM
2368 ** is not defined), then it is important to call OP_Destroy on the
2369 ** table and index root-pages in order, starting with the numerically
2370 ** largest root-page number. This guarantees that none of the root-pages
2371 ** to be destroyed is relocated by an earlier OP_Destroy. i.e. if the
2372 ** following were coded:
2378 ** and root page 5 happened to be the largest root-page number in the
2379 ** database, then root page 5 would be moved to page 4 by the
2380 ** "OP_Destroy 4 0" opcode. The subsequent "OP_Destroy 5 0" would hit
2381 ** a free-list page.
2383 int iTab
= pTab
->tnum
;
2390 if( iDestroyed
==0 || iTab
<iDestroyed
){
2393 for(pIdx
=pTab
->pIndex
; pIdx
; pIdx
=pIdx
->pNext
){
2394 int iIdx
= pIdx
->tnum
;
2395 assert( pIdx
->pSchema
==pTab
->pSchema
);
2396 if( (iDestroyed
==0 || (iIdx
<iDestroyed
)) && iIdx
>iLargest
){
2403 int iDb
= sqlite3SchemaToIndex(pParse
->db
, pTab
->pSchema
);
2404 assert( iDb
>=0 && iDb
<pParse
->db
->nDb
);
2405 destroyRootPage(pParse
, iLargest
, iDb
);
2406 iDestroyed
= iLargest
;
2412 ** Remove entries from the sqlite_statN tables (for N in (1,2,3))
2413 ** after a DROP INDEX or DROP TABLE command.
2415 static void sqlite3ClearStatTables(
2416 Parse
*pParse
, /* The parsing context */
2417 int iDb
, /* The database number */
2418 const char *zType
, /* "idx" or "tbl" */
2419 const char *zName
/* Name of index or table */
2422 const char *zDbName
= pParse
->db
->aDb
[iDb
].zDbSName
;
2423 for(i
=1; i
<=4; i
++){
2425 sqlite3_snprintf(sizeof(zTab
),zTab
,"sqlite_stat%d",i
);
2426 if( sqlite3FindTable(pParse
->db
, zTab
, zDbName
) ){
2427 sqlite3NestedParse(pParse
,
2428 "DELETE FROM %Q.%s WHERE %s=%Q",
2429 zDbName
, zTab
, zType
, zName
2436 ** Generate code to drop a table.
2438 void sqlite3CodeDropTable(Parse
*pParse
, Table
*pTab
, int iDb
, int isView
){
2440 sqlite3
*db
= pParse
->db
;
2442 Db
*pDb
= &db
->aDb
[iDb
];
2444 v
= sqlite3GetVdbe(pParse
);
2446 sqlite3BeginWriteOperation(pParse
, 1, iDb
);
2448 #ifndef SQLITE_OMIT_VIRTUALTABLE
2449 if( IsVirtual(pTab
) ){
2450 sqlite3VdbeAddOp0(v
, OP_VBegin
);
2454 /* Drop all triggers associated with the table being dropped. Code
2455 ** is generated to remove entries from sqlite_master and/or
2456 ** sqlite_temp_master if required.
2458 pTrigger
= sqlite3TriggerList(pParse
, pTab
);
2460 assert( pTrigger
->pSchema
==pTab
->pSchema
||
2461 pTrigger
->pSchema
==db
->aDb
[1].pSchema
);
2462 sqlite3DropTriggerPtr(pParse
, pTrigger
);
2463 pTrigger
= pTrigger
->pNext
;
2466 #ifndef SQLITE_OMIT_AUTOINCREMENT
2467 /* Remove any entries of the sqlite_sequence table associated with
2468 ** the table being dropped. This is done before the table is dropped
2469 ** at the btree level, in case the sqlite_sequence table needs to
2470 ** move as a result of the drop (can happen in auto-vacuum mode).
2472 if( pTab
->tabFlags
& TF_Autoincrement
){
2473 sqlite3NestedParse(pParse
,
2474 "DELETE FROM %Q.sqlite_sequence WHERE name=%Q",
2475 pDb
->zDbSName
, pTab
->zName
2480 /* Drop all SQLITE_MASTER table and index entries that refer to the
2481 ** table. The program name loops through the master table and deletes
2482 ** every row that refers to a table of the same name as the one being
2483 ** dropped. Triggers are handled separately because a trigger can be
2484 ** created in the temp database that refers to a table in another
2487 sqlite3NestedParse(pParse
,
2488 "DELETE FROM %Q.%s WHERE tbl_name=%Q and type!='trigger'",
2489 pDb
->zDbSName
, MASTER_NAME
, pTab
->zName
);
2490 if( !isView
&& !IsVirtual(pTab
) ){
2491 destroyTable(pParse
, pTab
);
2494 /* Remove the table entry from SQLite's internal schema and modify
2495 ** the schema cookie.
2497 if( IsVirtual(pTab
) ){
2498 sqlite3VdbeAddOp4(v
, OP_VDestroy
, iDb
, 0, 0, pTab
->zName
, 0);
2500 sqlite3VdbeAddOp4(v
, OP_DropTable
, iDb
, 0, 0, pTab
->zName
, 0);
2501 sqlite3ChangeCookie(pParse
, iDb
);
2502 sqliteViewResetAll(db
, iDb
);
2506 ** This routine is called to do the work of a DROP TABLE statement.
2507 ** pName is the name of the table to be dropped.
2509 void sqlite3DropTable(Parse
*pParse
, SrcList
*pName
, int isView
, int noErr
){
2512 sqlite3
*db
= pParse
->db
;
2515 if( db
->mallocFailed
){
2516 goto exit_drop_table
;
2518 assert( pParse
->nErr
==0 );
2519 assert( pName
->nSrc
==1 );
2520 if( sqlite3ReadSchema(pParse
) ) goto exit_drop_table
;
2521 if( noErr
) db
->suppressErr
++;
2522 assert( isView
==0 || isView
==LOCATE_VIEW
);
2523 pTab
= sqlite3LocateTableItem(pParse
, isView
, &pName
->a
[0]);
2524 if( noErr
) db
->suppressErr
--;
2527 if( noErr
) sqlite3CodeVerifyNamedSchema(pParse
, pName
->a
[0].zDatabase
);
2528 goto exit_drop_table
;
2530 iDb
= sqlite3SchemaToIndex(db
, pTab
->pSchema
);
2531 assert( iDb
>=0 && iDb
<db
->nDb
);
2533 /* If pTab is a virtual table, call ViewGetColumnNames() to ensure
2534 ** it is initialized.
2536 if( IsVirtual(pTab
) && sqlite3ViewGetColumnNames(pParse
, pTab
) ){
2537 goto exit_drop_table
;
2539 #ifndef SQLITE_OMIT_AUTHORIZATION
2542 const char *zTab
= SCHEMA_TABLE(iDb
);
2543 const char *zDb
= db
->aDb
[iDb
].zDbSName
;
2544 const char *zArg2
= 0;
2545 if( sqlite3AuthCheck(pParse
, SQLITE_DELETE
, zTab
, 0, zDb
)){
2546 goto exit_drop_table
;
2549 if( !OMIT_TEMPDB
&& iDb
==1 ){
2550 code
= SQLITE_DROP_TEMP_VIEW
;
2552 code
= SQLITE_DROP_VIEW
;
2554 #ifndef SQLITE_OMIT_VIRTUALTABLE
2555 }else if( IsVirtual(pTab
) ){
2556 code
= SQLITE_DROP_VTABLE
;
2557 zArg2
= sqlite3GetVTable(db
, pTab
)->pMod
->zName
;
2560 if( !OMIT_TEMPDB
&& iDb
==1 ){
2561 code
= SQLITE_DROP_TEMP_TABLE
;
2563 code
= SQLITE_DROP_TABLE
;
2566 if( sqlite3AuthCheck(pParse
, code
, pTab
->zName
, zArg2
, zDb
) ){
2567 goto exit_drop_table
;
2569 if( sqlite3AuthCheck(pParse
, SQLITE_DELETE
, pTab
->zName
, 0, zDb
) ){
2570 goto exit_drop_table
;
2574 if( sqlite3StrNICmp(pTab
->zName
, "sqlite_", 7)==0
2575 && sqlite3StrNICmp(pTab
->zName
, "sqlite_stat", 11)!=0 ){
2576 sqlite3ErrorMsg(pParse
, "table %s may not be dropped", pTab
->zName
);
2577 goto exit_drop_table
;
2580 #ifndef SQLITE_OMIT_VIEW
2581 /* Ensure DROP TABLE is not used on a view, and DROP VIEW is not used
2584 if( isView
&& pTab
->pSelect
==0 ){
2585 sqlite3ErrorMsg(pParse
, "use DROP TABLE to delete table %s", pTab
->zName
);
2586 goto exit_drop_table
;
2588 if( !isView
&& pTab
->pSelect
){
2589 sqlite3ErrorMsg(pParse
, "use DROP VIEW to delete view %s", pTab
->zName
);
2590 goto exit_drop_table
;
2594 /* Generate code to remove the table from the master table
2597 v
= sqlite3GetVdbe(pParse
);
2599 sqlite3BeginWriteOperation(pParse
, 1, iDb
);
2600 sqlite3ClearStatTables(pParse
, iDb
, "tbl", pTab
->zName
);
2601 sqlite3FkDropTable(pParse
, pName
, pTab
);
2602 sqlite3CodeDropTable(pParse
, pTab
, iDb
, isView
);
2606 sqlite3SrcListDelete(db
, pName
);
2610 ** This routine is called to create a new foreign key on the table
2611 ** currently under construction. pFromCol determines which columns
2612 ** in the current table point to the foreign key. If pFromCol==0 then
2613 ** connect the key to the last column inserted. pTo is the name of
2614 ** the table referred to (a.k.a the "parent" table). pToCol is a list
2615 ** of tables in the parent pTo table. flags contains all
2616 ** information about the conflict resolution algorithms specified
2617 ** in the ON DELETE, ON UPDATE and ON INSERT clauses.
2619 ** An FKey structure is created and added to the table currently
2620 ** under construction in the pParse->pNewTable field.
2622 ** The foreign key is set for IMMEDIATE processing. A subsequent call
2623 ** to sqlite3DeferForeignKey() might change this to DEFERRED.
2625 void sqlite3CreateForeignKey(
2626 Parse
*pParse
, /* Parsing context */
2627 ExprList
*pFromCol
, /* Columns in this table that point to other table */
2628 Token
*pTo
, /* Name of the other table */
2629 ExprList
*pToCol
, /* Columns in the other table */
2630 int flags
/* Conflict resolution algorithms. */
2632 sqlite3
*db
= pParse
->db
;
2633 #ifndef SQLITE_OMIT_FOREIGN_KEY
2636 Table
*p
= pParse
->pNewTable
;
2643 if( p
==0 || IN_DECLARE_VTAB
) goto fk_end
;
2645 int iCol
= p
->nCol
-1;
2646 if( NEVER(iCol
<0) ) goto fk_end
;
2647 if( pToCol
&& pToCol
->nExpr
!=1 ){
2648 sqlite3ErrorMsg(pParse
, "foreign key on %s"
2649 " should reference only one column of table %T",
2650 p
->aCol
[iCol
].zName
, pTo
);
2654 }else if( pToCol
&& pToCol
->nExpr
!=pFromCol
->nExpr
){
2655 sqlite3ErrorMsg(pParse
,
2656 "number of columns in foreign key does not match the number of "
2657 "columns in the referenced table");
2660 nCol
= pFromCol
->nExpr
;
2662 nByte
= sizeof(*pFKey
) + (nCol
-1)*sizeof(pFKey
->aCol
[0]) + pTo
->n
+ 1;
2664 for(i
=0; i
<pToCol
->nExpr
; i
++){
2665 nByte
+= sqlite3Strlen30(pToCol
->a
[i
].zName
) + 1;
2668 pFKey
= sqlite3DbMallocZero(db
, nByte
);
2673 pFKey
->pNextFrom
= p
->pFKey
;
2674 z
= (char*)&pFKey
->aCol
[nCol
];
2676 memcpy(z
, pTo
->z
, pTo
->n
);
2682 pFKey
->aCol
[0].iFrom
= p
->nCol
-1;
2684 for(i
=0; i
<nCol
; i
++){
2686 for(j
=0; j
<p
->nCol
; j
++){
2687 if( sqlite3StrICmp(p
->aCol
[j
].zName
, pFromCol
->a
[i
].zName
)==0 ){
2688 pFKey
->aCol
[i
].iFrom
= j
;
2693 sqlite3ErrorMsg(pParse
,
2694 "unknown column \"%s\" in foreign key definition",
2695 pFromCol
->a
[i
].zName
);
2701 for(i
=0; i
<nCol
; i
++){
2702 int n
= sqlite3Strlen30(pToCol
->a
[i
].zName
);
2703 pFKey
->aCol
[i
].zCol
= z
;
2704 memcpy(z
, pToCol
->a
[i
].zName
, n
);
2709 pFKey
->isDeferred
= 0;
2710 pFKey
->aAction
[0] = (u8
)(flags
& 0xff); /* ON DELETE action */
2711 pFKey
->aAction
[1] = (u8
)((flags
>> 8 ) & 0xff); /* ON UPDATE action */
2713 assert( sqlite3SchemaMutexHeld(db
, 0, p
->pSchema
) );
2714 pNextTo
= (FKey
*)sqlite3HashInsert(&p
->pSchema
->fkeyHash
,
2715 pFKey
->zTo
, (void *)pFKey
2717 if( pNextTo
==pFKey
){
2718 sqlite3OomFault(db
);
2722 assert( pNextTo
->pPrevTo
==0 );
2723 pFKey
->pNextTo
= pNextTo
;
2724 pNextTo
->pPrevTo
= pFKey
;
2727 /* Link the foreign key to the table as the last step.
2733 sqlite3DbFree(db
, pFKey
);
2734 #endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */
2735 sqlite3ExprListDelete(db
, pFromCol
);
2736 sqlite3ExprListDelete(db
, pToCol
);
2740 ** This routine is called when an INITIALLY IMMEDIATE or INITIALLY DEFERRED
2741 ** clause is seen as part of a foreign key definition. The isDeferred
2742 ** parameter is 1 for INITIALLY DEFERRED and 0 for INITIALLY IMMEDIATE.
2743 ** The behavior of the most recently created foreign key is adjusted
2746 void sqlite3DeferForeignKey(Parse
*pParse
, int isDeferred
){
2747 #ifndef SQLITE_OMIT_FOREIGN_KEY
2750 if( (pTab
= pParse
->pNewTable
)==0 || (pFKey
= pTab
->pFKey
)==0 ) return;
2751 assert( isDeferred
==0 || isDeferred
==1 ); /* EV: R-30323-21917 */
2752 pFKey
->isDeferred
= (u8
)isDeferred
;
2757 ** Generate code that will erase and refill index *pIdx. This is
2758 ** used to initialize a newly created index or to recompute the
2759 ** content of an index in response to a REINDEX command.
2761 ** if memRootPage is not negative, it means that the index is newly
2762 ** created. The register specified by memRootPage contains the
2763 ** root page number of the index. If memRootPage is negative, then
2764 ** the index already exists and must be cleared before being refilled and
2765 ** the root page number of the index is taken from pIndex->tnum.
2767 static void sqlite3RefillIndex(Parse
*pParse
, Index
*pIndex
, int memRootPage
){
2768 Table
*pTab
= pIndex
->pTable
; /* The table that is indexed */
2769 int iTab
= pParse
->nTab
++; /* Btree cursor used for pTab */
2770 int iIdx
= pParse
->nTab
++; /* Btree cursor used for pIndex */
2771 int iSorter
; /* Cursor opened by OpenSorter (if in use) */
2772 int addr1
; /* Address of top of loop */
2773 int addr2
; /* Address to jump to for next iteration */
2774 int tnum
; /* Root page of index */
2775 int iPartIdxLabel
; /* Jump to this label to skip a row */
2776 Vdbe
*v
; /* Generate code into this virtual machine */
2777 KeyInfo
*pKey
; /* KeyInfo for index */
2778 int regRecord
; /* Register holding assembled index record */
2779 sqlite3
*db
= pParse
->db
; /* The database connection */
2780 int iDb
= sqlite3SchemaToIndex(db
, pIndex
->pSchema
);
2782 #ifndef SQLITE_OMIT_AUTHORIZATION
2783 if( sqlite3AuthCheck(pParse
, SQLITE_REINDEX
, pIndex
->zName
, 0,
2784 db
->aDb
[iDb
].zDbSName
) ){
2789 /* Require a write-lock on the table to perform this operation */
2790 sqlite3TableLock(pParse
, iDb
, pTab
->tnum
, 1, pTab
->zName
);
2792 v
= sqlite3GetVdbe(pParse
);
2794 if( memRootPage
>=0 ){
2797 tnum
= pIndex
->tnum
;
2799 pKey
= sqlite3KeyInfoOfIndex(pParse
, pIndex
);
2800 assert( pKey
!=0 || db
->mallocFailed
|| pParse
->nErr
);
2802 /* Open the sorter cursor if we are to use one. */
2803 iSorter
= pParse
->nTab
++;
2804 sqlite3VdbeAddOp4(v
, OP_SorterOpen
, iSorter
, 0, pIndex
->nKeyCol
, (char*)
2805 sqlite3KeyInfoRef(pKey
), P4_KEYINFO
);
2807 /* Open the table. Loop through all rows of the table, inserting index
2808 ** records into the sorter. */
2809 sqlite3OpenTable(pParse
, iTab
, iDb
, pTab
, OP_OpenRead
);
2810 addr1
= sqlite3VdbeAddOp2(v
, OP_Rewind
, iTab
, 0); VdbeCoverage(v
);
2811 regRecord
= sqlite3GetTempReg(pParse
);
2813 sqlite3GenerateIndexKey(pParse
,pIndex
,iTab
,regRecord
,0,&iPartIdxLabel
,0,0);
2814 sqlite3VdbeAddOp2(v
, OP_SorterInsert
, iSorter
, regRecord
);
2815 sqlite3ResolvePartIdxLabel(pParse
, iPartIdxLabel
);
2816 sqlite3VdbeAddOp2(v
, OP_Next
, iTab
, addr1
+1); VdbeCoverage(v
);
2817 sqlite3VdbeJumpHere(v
, addr1
);
2818 if( memRootPage
<0 ) sqlite3VdbeAddOp2(v
, OP_Clear
, tnum
, iDb
);
2819 sqlite3VdbeAddOp4(v
, OP_OpenWrite
, iIdx
, tnum
, iDb
,
2820 (char *)pKey
, P4_KEYINFO
);
2821 sqlite3VdbeChangeP5(v
, OPFLAG_BULKCSR
|((memRootPage
>=0)?OPFLAG_P2ISREG
:0));
2823 addr1
= sqlite3VdbeAddOp2(v
, OP_SorterSort
, iSorter
, 0); VdbeCoverage(v
);
2824 if( IsUniqueIndex(pIndex
) ){
2825 int j2
= sqlite3VdbeCurrentAddr(v
) + 3;
2826 sqlite3VdbeGoto(v
, j2
);
2827 addr2
= sqlite3VdbeCurrentAddr(v
);
2828 sqlite3VdbeAddOp4Int(v
, OP_SorterCompare
, iSorter
, j2
, regRecord
,
2829 pIndex
->nKeyCol
); VdbeCoverage(v
);
2830 sqlite3UniqueConstraint(pParse
, OE_Abort
, pIndex
);
2832 addr2
= sqlite3VdbeCurrentAddr(v
);
2834 sqlite3VdbeAddOp3(v
, OP_SorterData
, iSorter
, regRecord
, iIdx
);
2835 sqlite3VdbeAddOp1(v
, OP_SeekEnd
, iIdx
);
2836 sqlite3VdbeAddOp2(v
, OP_IdxInsert
, iIdx
, regRecord
);
2837 sqlite3VdbeChangeP5(v
, OPFLAG_USESEEKRESULT
);
2838 sqlite3ReleaseTempReg(pParse
, regRecord
);
2839 sqlite3VdbeAddOp2(v
, OP_SorterNext
, iSorter
, addr2
); VdbeCoverage(v
);
2840 sqlite3VdbeJumpHere(v
, addr1
);
2842 sqlite3VdbeAddOp1(v
, OP_Close
, iTab
);
2843 sqlite3VdbeAddOp1(v
, OP_Close
, iIdx
);
2844 sqlite3VdbeAddOp1(v
, OP_Close
, iSorter
);
2848 ** Allocate heap space to hold an Index object with nCol columns.
2850 ** Increase the allocation size to provide an extra nExtra bytes
2851 ** of 8-byte aligned space after the Index object and return a
2852 ** pointer to this extra space in *ppExtra.
2854 Index
*sqlite3AllocateIndexObject(
2855 sqlite3
*db
, /* Database connection */
2856 i16 nCol
, /* Total number of columns in the index */
2857 int nExtra
, /* Number of bytes of extra space to alloc */
2858 char **ppExtra
/* Pointer to the "extra" space */
2860 Index
*p
; /* Allocated index object */
2861 int nByte
; /* Bytes of space for Index object + arrays */
2863 nByte
= ROUND8(sizeof(Index
)) + /* Index structure */
2864 ROUND8(sizeof(char*)*nCol
) + /* Index.azColl */
2865 ROUND8(sizeof(LogEst
)*(nCol
+1) + /* Index.aiRowLogEst */
2866 sizeof(i16
)*nCol
+ /* Index.aiColumn */
2867 sizeof(u8
)*nCol
); /* Index.aSortOrder */
2868 p
= sqlite3DbMallocZero(db
, nByte
+ nExtra
);
2870 char *pExtra
= ((char*)p
)+ROUND8(sizeof(Index
));
2871 p
->azColl
= (const char**)pExtra
; pExtra
+= ROUND8(sizeof(char*)*nCol
);
2872 p
->aiRowLogEst
= (LogEst
*)pExtra
; pExtra
+= sizeof(LogEst
)*(nCol
+1);
2873 p
->aiColumn
= (i16
*)pExtra
; pExtra
+= sizeof(i16
)*nCol
;
2874 p
->aSortOrder
= (u8
*)pExtra
;
2876 p
->nKeyCol
= nCol
- 1;
2877 *ppExtra
= ((char*)p
) + nByte
;
2883 ** Create a new index for an SQL table. pName1.pName2 is the name of the index
2884 ** and pTblList is the name of the table that is to be indexed. Both will
2885 ** be NULL for a primary key or an index that is created to satisfy a
2886 ** UNIQUE constraint. If pTable and pIndex are NULL, use pParse->pNewTable
2887 ** as the table to be indexed. pParse->pNewTable is a table that is
2888 ** currently being constructed by a CREATE TABLE statement.
2890 ** pList is a list of columns to be indexed. pList will be NULL if this
2891 ** is a primary key or unique-constraint on the most recent column added
2892 ** to the table currently under construction.
2894 void sqlite3CreateIndex(
2895 Parse
*pParse
, /* All information about this parse */
2896 Token
*pName1
, /* First part of index name. May be NULL */
2897 Token
*pName2
, /* Second part of index name. May be NULL */
2898 SrcList
*pTblName
, /* Table to index. Use pParse->pNewTable if 0 */
2899 ExprList
*pList
, /* A list of columns to be indexed */
2900 int onError
, /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
2901 Token
*pStart
, /* The CREATE token that begins this statement */
2902 Expr
*pPIWhere
, /* WHERE clause for partial indices */
2903 int sortOrder
, /* Sort order of primary key when pList==NULL */
2904 int ifNotExist
, /* Omit error if index already exists */
2905 u8 idxType
/* The index type */
2907 Table
*pTab
= 0; /* Table to be indexed */
2908 Index
*pIndex
= 0; /* The index to be created */
2909 char *zName
= 0; /* Name of the index */
2910 int nName
; /* Number of characters in zName */
2912 DbFixer sFix
; /* For assigning database names to pTable */
2913 int sortOrderMask
; /* 1 to honor DESC in index. 0 to ignore. */
2914 sqlite3
*db
= pParse
->db
;
2915 Db
*pDb
; /* The specific table containing the indexed database */
2916 int iDb
; /* Index of the database that is being written */
2917 Token
*pName
= 0; /* Unqualified name of the index to create */
2918 struct ExprList_item
*pListItem
; /* For looping over pList */
2919 int nExtra
= 0; /* Space allocated for zExtra[] */
2920 int nExtraCol
; /* Number of extra columns needed */
2921 char *zExtra
= 0; /* Extra space after the Index object */
2922 Index
*pPk
= 0; /* PRIMARY KEY index for WITHOUT ROWID tables */
2924 if( db
->mallocFailed
|| pParse
->nErr
>0 ){
2925 goto exit_create_index
;
2927 if( IN_DECLARE_VTAB
&& idxType
!=SQLITE_IDXTYPE_PRIMARYKEY
){
2928 goto exit_create_index
;
2930 if( SQLITE_OK
!=sqlite3ReadSchema(pParse
) ){
2931 goto exit_create_index
;
2935 ** Find the table that is to be indexed. Return early if not found.
2939 /* Use the two-part index name to determine the database
2940 ** to search for the table. 'Fix' the table name to this db
2941 ** before looking up the table.
2943 assert( pName1
&& pName2
);
2944 iDb
= sqlite3TwoPartName(pParse
, pName1
, pName2
, &pName
);
2945 if( iDb
<0 ) goto exit_create_index
;
2946 assert( pName
&& pName
->z
);
2948 #ifndef SQLITE_OMIT_TEMPDB
2949 /* If the index name was unqualified, check if the table
2950 ** is a temp table. If so, set the database to 1. Do not do this
2951 ** if initialising a database schema.
2953 if( !db
->init
.busy
){
2954 pTab
= sqlite3SrcListLookup(pParse
, pTblName
);
2955 if( pName2
->n
==0 && pTab
&& pTab
->pSchema
==db
->aDb
[1].pSchema
){
2961 sqlite3FixInit(&sFix
, pParse
, iDb
, "index", pName
);
2962 if( sqlite3FixSrcList(&sFix
, pTblName
) ){
2963 /* Because the parser constructs pTblName from a single identifier,
2964 ** sqlite3FixSrcList can never fail. */
2967 pTab
= sqlite3LocateTableItem(pParse
, 0, &pTblName
->a
[0]);
2968 assert( db
->mallocFailed
==0 || pTab
==0 );
2969 if( pTab
==0 ) goto exit_create_index
;
2970 if( iDb
==1 && db
->aDb
[iDb
].pSchema
!=pTab
->pSchema
){
2971 sqlite3ErrorMsg(pParse
,
2972 "cannot create a TEMP index on non-TEMP table \"%s\"",
2974 goto exit_create_index
;
2976 if( !HasRowid(pTab
) ) pPk
= sqlite3PrimaryKeyIndex(pTab
);
2979 assert( pStart
==0 );
2980 pTab
= pParse
->pNewTable
;
2981 if( !pTab
) goto exit_create_index
;
2982 iDb
= sqlite3SchemaToIndex(db
, pTab
->pSchema
);
2984 pDb
= &db
->aDb
[iDb
];
2987 assert( pParse
->nErr
==0 );
2988 if( sqlite3StrNICmp(pTab
->zName
, "sqlite_", 7)==0
2990 #if SQLITE_USER_AUTHENTICATION
2991 && sqlite3UserAuthTable(pTab
->zName
)==0
2993 && sqlite3StrNICmp(&pTab
->zName
[7],"altertab_",9)!=0 ){
2994 sqlite3ErrorMsg(pParse
, "table %s may not be indexed", pTab
->zName
);
2995 goto exit_create_index
;
2997 #ifndef SQLITE_OMIT_VIEW
2998 if( pTab
->pSelect
){
2999 sqlite3ErrorMsg(pParse
, "views may not be indexed");
3000 goto exit_create_index
;
3003 #ifndef SQLITE_OMIT_VIRTUALTABLE
3004 if( IsVirtual(pTab
) ){
3005 sqlite3ErrorMsg(pParse
, "virtual tables may not be indexed");
3006 goto exit_create_index
;
3011 ** Find the name of the index. Make sure there is not already another
3012 ** index or table with the same name.
3014 ** Exception: If we are reading the names of permanent indices from the
3015 ** sqlite_master table (because some other process changed the schema) and
3016 ** one of the index names collides with the name of a temporary table or
3017 ** index, then we will continue to process this index.
3019 ** If pName==0 it means that we are
3020 ** dealing with a primary key or UNIQUE constraint. We have to invent our
3024 zName
= sqlite3NameFromToken(db
, pName
);
3025 if( zName
==0 ) goto exit_create_index
;
3026 assert( pName
->z
!=0 );
3027 if( SQLITE_OK
!=sqlite3CheckObjectName(pParse
, zName
) ){
3028 goto exit_create_index
;
3030 if( !db
->init
.busy
){
3031 if( sqlite3FindTable(db
, zName
, 0)!=0 ){
3032 sqlite3ErrorMsg(pParse
, "there is already a table named %s", zName
);
3033 goto exit_create_index
;
3036 if( sqlite3FindIndex(db
, zName
, pDb
->zDbSName
)!=0 ){
3038 sqlite3ErrorMsg(pParse
, "index %s already exists", zName
);
3040 assert( !db
->init
.busy
);
3041 sqlite3CodeVerifySchema(pParse
, iDb
);
3043 goto exit_create_index
;
3048 for(pLoop
=pTab
->pIndex
, n
=1; pLoop
; pLoop
=pLoop
->pNext
, n
++){}
3049 zName
= sqlite3MPrintf(db
, "sqlite_autoindex_%s_%d", pTab
->zName
, n
);
3051 goto exit_create_index
;
3054 /* Automatic index names generated from within sqlite3_declare_vtab()
3055 ** must have names that are distinct from normal automatic index names.
3056 ** The following statement converts "sqlite3_autoindex..." into
3057 ** "sqlite3_butoindex..." in order to make the names distinct.
3058 ** The "vtab_err.test" test demonstrates the need of this statement. */
3059 if( IN_DECLARE_VTAB
) zName
[7]++;
3062 /* Check for authorization to create an index.
3064 #ifndef SQLITE_OMIT_AUTHORIZATION
3066 const char *zDb
= pDb
->zDbSName
;
3067 if( sqlite3AuthCheck(pParse
, SQLITE_INSERT
, SCHEMA_TABLE(iDb
), 0, zDb
) ){
3068 goto exit_create_index
;
3070 i
= SQLITE_CREATE_INDEX
;
3071 if( !OMIT_TEMPDB
&& iDb
==1 ) i
= SQLITE_CREATE_TEMP_INDEX
;
3072 if( sqlite3AuthCheck(pParse
, i
, zName
, pTab
->zName
, zDb
) ){
3073 goto exit_create_index
;
3078 /* If pList==0, it means this routine was called to make a primary
3079 ** key out of the last column added to the table under construction.
3080 ** So create a fake list to simulate this.
3084 sqlite3TokenInit(&prevCol
, pTab
->aCol
[pTab
->nCol
-1].zName
);
3085 pList
= sqlite3ExprListAppend(pParse
, 0,
3086 sqlite3ExprAlloc(db
, TK_ID
, &prevCol
, 0));
3087 if( pList
==0 ) goto exit_create_index
;
3088 assert( pList
->nExpr
==1 );
3089 sqlite3ExprListSetSortOrder(pList
, sortOrder
);
3091 sqlite3ExprListCheckLength(pParse
, pList
, "index");
3094 /* Figure out how many bytes of space are required to store explicitly
3095 ** specified collation sequence names.
3097 for(i
=0; i
<pList
->nExpr
; i
++){
3098 Expr
*pExpr
= pList
->a
[i
].pExpr
;
3100 if( pExpr
->op
==TK_COLLATE
){
3101 nExtra
+= (1 + sqlite3Strlen30(pExpr
->u
.zToken
));
3106 ** Allocate the index structure.
3108 nName
= sqlite3Strlen30(zName
);
3109 nExtraCol
= pPk
? pPk
->nKeyCol
: 1;
3110 pIndex
= sqlite3AllocateIndexObject(db
, pList
->nExpr
+ nExtraCol
,
3111 nName
+ nExtra
+ 1, &zExtra
);
3112 if( db
->mallocFailed
){
3113 goto exit_create_index
;
3115 assert( EIGHT_BYTE_ALIGNMENT(pIndex
->aiRowLogEst
) );
3116 assert( EIGHT_BYTE_ALIGNMENT(pIndex
->azColl
) );
3117 pIndex
->zName
= zExtra
;
3118 zExtra
+= nName
+ 1;
3119 memcpy(pIndex
->zName
, zName
, nName
+1);
3120 pIndex
->pTable
= pTab
;
3121 pIndex
->onError
= (u8
)onError
;
3122 pIndex
->uniqNotNull
= onError
!=OE_None
;
3123 pIndex
->idxType
= idxType
;
3124 pIndex
->pSchema
= db
->aDb
[iDb
].pSchema
;
3125 pIndex
->nKeyCol
= pList
->nExpr
;
3127 sqlite3ResolveSelfReference(pParse
, pTab
, NC_PartIdx
, pPIWhere
, 0);
3128 pIndex
->pPartIdxWhere
= pPIWhere
;
3131 assert( sqlite3SchemaMutexHeld(db
, iDb
, 0) );
3133 /* Check to see if we should honor DESC requests on index columns
3135 if( pDb
->pSchema
->file_format
>=4 ){
3136 sortOrderMask
= -1; /* Honor DESC */
3138 sortOrderMask
= 0; /* Ignore DESC */
3141 /* Analyze the list of expressions that form the terms of the index and
3142 ** report any errors. In the common case where the expression is exactly
3143 ** a table column, store that column in aiColumn[]. For general expressions,
3144 ** populate pIndex->aColExpr and store XN_EXPR (-2) in aiColumn[].
3146 ** TODO: Issue a warning if two or more columns of the index are identical.
3147 ** TODO: Issue a warning if the table primary key is used as part of the
3150 for(i
=0, pListItem
=pList
->a
; i
<pList
->nExpr
; i
++, pListItem
++){
3151 Expr
*pCExpr
; /* The i-th index expression */
3152 int requestedSortOrder
; /* ASC or DESC on the i-th expression */
3153 const char *zColl
; /* Collation sequence name */
3155 sqlite3StringToId(pListItem
->pExpr
);
3156 sqlite3ResolveSelfReference(pParse
, pTab
, NC_IdxExpr
, pListItem
->pExpr
, 0);
3157 if( pParse
->nErr
) goto exit_create_index
;
3158 pCExpr
= sqlite3ExprSkipCollate(pListItem
->pExpr
);
3159 if( pCExpr
->op
!=TK_COLUMN
){
3160 if( pTab
==pParse
->pNewTable
){
3161 sqlite3ErrorMsg(pParse
, "expressions prohibited in PRIMARY KEY and "
3162 "UNIQUE constraints");
3163 goto exit_create_index
;
3165 if( pIndex
->aColExpr
==0 ){
3166 ExprList
*pCopy
= sqlite3ExprListDup(db
, pList
, 0);
3167 pIndex
->aColExpr
= pCopy
;
3168 if( !db
->mallocFailed
){
3170 pListItem
= &pCopy
->a
[i
];
3174 pIndex
->aiColumn
[i
] = XN_EXPR
;
3175 pIndex
->uniqNotNull
= 0;
3177 j
= pCExpr
->iColumn
;
3178 assert( j
<=0x7fff );
3181 }else if( pTab
->aCol
[j
].notNull
==0 ){
3182 pIndex
->uniqNotNull
= 0;
3184 pIndex
->aiColumn
[i
] = (i16
)j
;
3187 if( pListItem
->pExpr
->op
==TK_COLLATE
){
3189 zColl
= pListItem
->pExpr
->u
.zToken
;
3190 nColl
= sqlite3Strlen30(zColl
) + 1;
3191 assert( nExtra
>=nColl
);
3192 memcpy(zExtra
, zColl
, nColl
);
3197 zColl
= pTab
->aCol
[j
].zColl
;
3199 if( !zColl
) zColl
= sqlite3StrBINARY
;
3200 if( !db
->init
.busy
&& !sqlite3LocateCollSeq(pParse
, zColl
) ){
3201 goto exit_create_index
;
3203 pIndex
->azColl
[i
] = zColl
;
3204 requestedSortOrder
= pListItem
->sortOrder
& sortOrderMask
;
3205 pIndex
->aSortOrder
[i
] = (u8
)requestedSortOrder
;
3208 /* Append the table key to the end of the index. For WITHOUT ROWID
3209 ** tables (when pPk!=0) this will be the declared PRIMARY KEY. For
3210 ** normal tables (when pPk==0) this will be the rowid.
3213 for(j
=0; j
<pPk
->nKeyCol
; j
++){
3214 int x
= pPk
->aiColumn
[j
];
3216 if( hasColumn(pIndex
->aiColumn
, pIndex
->nKeyCol
, x
) ){
3219 pIndex
->aiColumn
[i
] = x
;
3220 pIndex
->azColl
[i
] = pPk
->azColl
[j
];
3221 pIndex
->aSortOrder
[i
] = pPk
->aSortOrder
[j
];
3225 assert( i
==pIndex
->nColumn
);
3227 pIndex
->aiColumn
[i
] = XN_ROWID
;
3228 pIndex
->azColl
[i
] = sqlite3StrBINARY
;
3230 sqlite3DefaultRowEst(pIndex
);
3231 if( pParse
->pNewTable
==0 ) estimateIndexWidth(pIndex
);
3233 /* If this index contains every column of its table, then mark
3234 ** it as a covering index */
3235 assert( HasRowid(pTab
)
3236 || pTab
->iPKey
<0 || sqlite3ColumnOfIndex(pIndex
, pTab
->iPKey
)>=0 );
3237 if( pTblName
!=0 && pIndex
->nColumn
>=pTab
->nCol
){
3238 pIndex
->isCovering
= 1;
3239 for(j
=0; j
<pTab
->nCol
; j
++){
3240 if( j
==pTab
->iPKey
) continue;
3241 if( sqlite3ColumnOfIndex(pIndex
,j
)>=0 ) continue;
3242 pIndex
->isCovering
= 0;
3247 if( pTab
==pParse
->pNewTable
){
3248 /* This routine has been called to create an automatic index as a
3249 ** result of a PRIMARY KEY or UNIQUE clause on a column definition, or
3250 ** a PRIMARY KEY or UNIQUE clause following the column definitions.
3253 ** CREATE TABLE t(x PRIMARY KEY, y);
3254 ** CREATE TABLE t(x, y, UNIQUE(x, y));
3256 ** Either way, check to see if the table already has such an index. If
3257 ** so, don't bother creating this one. This only applies to
3258 ** automatically created indices. Users can do as they wish with
3259 ** explicit indices.
3261 ** Two UNIQUE or PRIMARY KEY constraints are considered equivalent
3262 ** (and thus suppressing the second one) even if they have different
3265 ** If there are different collating sequences or if the columns of
3266 ** the constraint occur in different orders, then the constraints are
3267 ** considered distinct and both result in separate indices.
3270 for(pIdx
=pTab
->pIndex
; pIdx
; pIdx
=pIdx
->pNext
){
3272 assert( IsUniqueIndex(pIdx
) );
3273 assert( pIdx
->idxType
!=SQLITE_IDXTYPE_APPDEF
);
3274 assert( IsUniqueIndex(pIndex
) );
3276 if( pIdx
->nKeyCol
!=pIndex
->nKeyCol
) continue;
3277 for(k
=0; k
<pIdx
->nKeyCol
; k
++){
3280 assert( pIdx
->aiColumn
[k
]>=0 );
3281 if( pIdx
->aiColumn
[k
]!=pIndex
->aiColumn
[k
] ) break;
3282 z1
= pIdx
->azColl
[k
];
3283 z2
= pIndex
->azColl
[k
];
3284 if( sqlite3StrICmp(z1
, z2
) ) break;
3286 if( k
==pIdx
->nKeyCol
){
3287 if( pIdx
->onError
!=pIndex
->onError
){
3288 /* This constraint creates the same index as a previous
3289 ** constraint specified somewhere in the CREATE TABLE statement.
3290 ** However the ON CONFLICT clauses are different. If both this
3291 ** constraint and the previous equivalent constraint have explicit
3292 ** ON CONFLICT clauses this is an error. Otherwise, use the
3293 ** explicitly specified behavior for the index.
3295 if( !(pIdx
->onError
==OE_Default
|| pIndex
->onError
==OE_Default
) ){
3296 sqlite3ErrorMsg(pParse
,
3297 "conflicting ON CONFLICT clauses specified", 0);
3299 if( pIdx
->onError
==OE_Default
){
3300 pIdx
->onError
= pIndex
->onError
;
3303 if( idxType
==SQLITE_IDXTYPE_PRIMARYKEY
) pIdx
->idxType
= idxType
;
3304 goto exit_create_index
;
3309 /* Link the new Index structure to its table and to the other
3310 ** in-memory database structures.
3312 assert( pParse
->nErr
==0 );
3313 if( db
->init
.busy
){
3315 assert( !IN_DECLARE_VTAB
);
3316 assert( sqlite3SchemaMutexHeld(db
, 0, pIndex
->pSchema
) );
3317 p
= sqlite3HashInsert(&pIndex
->pSchema
->idxHash
,
3318 pIndex
->zName
, pIndex
);
3320 assert( p
==pIndex
); /* Malloc must have failed */
3321 sqlite3OomFault(db
);
3322 goto exit_create_index
;
3324 db
->mDbFlags
|= DBFLAG_SchemaChange
;
3326 pIndex
->tnum
= db
->init
.newTnum
;
3330 /* If this is the initial CREATE INDEX statement (or CREATE TABLE if the
3331 ** index is an implied index for a UNIQUE or PRIMARY KEY constraint) then
3332 ** emit code to allocate the index rootpage on disk and make an entry for
3333 ** the index in the sqlite_master table and populate the index with
3334 ** content. But, do not do this if we are simply reading the sqlite_master
3335 ** table to parse the schema, or if this index is the PRIMARY KEY index
3336 ** of a WITHOUT ROWID table.
3338 ** If pTblName==0 it means this index is generated as an implied PRIMARY KEY
3339 ** or UNIQUE index in a CREATE TABLE statement. Since the table
3340 ** has just been created, it contains no data and the index initialization
3341 ** step can be skipped.
3343 else if( HasRowid(pTab
) || pTblName
!=0 ){
3346 int iMem
= ++pParse
->nMem
;
3348 v
= sqlite3GetVdbe(pParse
);
3349 if( v
==0 ) goto exit_create_index
;
3351 sqlite3BeginWriteOperation(pParse
, 1, iDb
);
3353 /* Create the rootpage for the index using CreateIndex. But before
3354 ** doing so, code a Noop instruction and store its address in
3355 ** Index.tnum. This is required in case this index is actually a
3356 ** PRIMARY KEY and the table is actually a WITHOUT ROWID table. In
3357 ** that case the convertToWithoutRowidTable() routine will replace
3358 ** the Noop with a Goto to jump over the VDBE code generated below. */
3359 pIndex
->tnum
= sqlite3VdbeAddOp0(v
, OP_Noop
);
3360 sqlite3VdbeAddOp3(v
, OP_CreateBtree
, iDb
, iMem
, BTREE_BLOBKEY
);
3362 /* Gather the complete text of the CREATE INDEX statement into
3363 ** the zStmt variable
3366 int n
= (int)(pParse
->sLastToken
.z
- pName
->z
) + pParse
->sLastToken
.n
;
3367 if( pName
->z
[n
-1]==';' ) n
--;
3368 /* A named index with an explicit CREATE INDEX statement */
3369 zStmt
= sqlite3MPrintf(db
, "CREATE%s INDEX %.*s",
3370 onError
==OE_None
? "" : " UNIQUE", n
, pName
->z
);
3372 /* An automatic index created by a PRIMARY KEY or UNIQUE constraint */
3373 /* zStmt = sqlite3MPrintf(""); */
3377 /* Add an entry in sqlite_master for this index
3379 sqlite3NestedParse(pParse
,
3380 "INSERT INTO %Q.%s VALUES('index',%Q,%Q,#%d,%Q);",
3381 db
->aDb
[iDb
].zDbSName
, MASTER_NAME
,
3387 sqlite3DbFree(db
, zStmt
);
3389 /* Fill the index with data and reparse the schema. Code an OP_Expire
3390 ** to invalidate all pre-compiled statements.
3393 sqlite3RefillIndex(pParse
, pIndex
, iMem
);
3394 sqlite3ChangeCookie(pParse
, iDb
);
3395 sqlite3VdbeAddParseSchemaOp(v
, iDb
,
3396 sqlite3MPrintf(db
, "name='%q' AND type='index'", pIndex
->zName
));
3397 sqlite3VdbeAddOp0(v
, OP_Expire
);
3400 sqlite3VdbeJumpHere(v
, pIndex
->tnum
);
3403 /* When adding an index to the list of indices for a table, make
3404 ** sure all indices labeled OE_Replace come after all those labeled
3405 ** OE_Ignore. This is necessary for the correct constraint check
3406 ** processing (in sqlite3GenerateConstraintChecks()) as part of
3407 ** UPDATE and INSERT statements.
3409 if( db
->init
.busy
|| pTblName
==0 ){
3410 if( onError
!=OE_Replace
|| pTab
->pIndex
==0
3411 || pTab
->pIndex
->onError
==OE_Replace
){
3412 pIndex
->pNext
= pTab
->pIndex
;
3413 pTab
->pIndex
= pIndex
;
3415 Index
*pOther
= pTab
->pIndex
;
3416 while( pOther
->pNext
&& pOther
->pNext
->onError
!=OE_Replace
){
3417 pOther
= pOther
->pNext
;
3419 pIndex
->pNext
= pOther
->pNext
;
3420 pOther
->pNext
= pIndex
;
3425 /* Clean up before exiting */
3427 if( pIndex
) freeIndex(db
, pIndex
);
3428 sqlite3ExprDelete(db
, pPIWhere
);
3429 sqlite3ExprListDelete(db
, pList
);
3430 sqlite3SrcListDelete(db
, pTblName
);
3431 sqlite3DbFree(db
, zName
);
3435 ** Fill the Index.aiRowEst[] array with default information - information
3436 ** to be used when we have not run the ANALYZE command.
3438 ** aiRowEst[0] is supposed to contain the number of elements in the index.
3439 ** Since we do not know, guess 1 million. aiRowEst[1] is an estimate of the
3440 ** number of rows in the table that match any particular value of the
3441 ** first column of the index. aiRowEst[2] is an estimate of the number
3442 ** of rows that match any particular combination of the first 2 columns
3443 ** of the index. And so forth. It must always be the case that
3445 ** aiRowEst[N]<=aiRowEst[N-1]
3448 ** Apart from that, we have little to go on besides intuition as to
3449 ** how aiRowEst[] should be initialized. The numbers generated here
3450 ** are based on typical values found in actual indices.
3452 void sqlite3DefaultRowEst(Index
*pIdx
){
3453 /* 10, 9, 8, 7, 6 */
3454 LogEst aVal
[] = { 33, 32, 30, 28, 26 };
3455 LogEst
*a
= pIdx
->aiRowLogEst
;
3456 int nCopy
= MIN(ArraySize(aVal
), pIdx
->nKeyCol
);
3459 /* Indexes with default row estimates should not have stat1 data */
3460 assert( !pIdx
->hasStat1
);
3462 /* Set the first entry (number of rows in the index) to the estimated
3463 ** number of rows in the table, or half the number of rows in the table
3464 ** for a partial index. But do not let the estimate drop below 10. */
3465 a
[0] = pIdx
->pTable
->nRowLogEst
;
3466 if( pIdx
->pPartIdxWhere
!=0 ) a
[0] -= 10; assert( 10==sqlite3LogEst(2) );
3467 if( a
[0]<33 ) a
[0] = 33; assert( 33==sqlite3LogEst(10) );
3469 /* Estimate that a[1] is 10, a[2] is 9, a[3] is 8, a[4] is 7, a[5] is
3470 ** 6 and each subsequent value (if any) is 5. */
3471 memcpy(&a
[1], aVal
, nCopy
*sizeof(LogEst
));
3472 for(i
=nCopy
+1; i
<=pIdx
->nKeyCol
; i
++){
3473 a
[i
] = 23; assert( 23==sqlite3LogEst(5) );
3476 assert( 0==sqlite3LogEst(1) );
3477 if( IsUniqueIndex(pIdx
) ) a
[pIdx
->nKeyCol
] = 0;
3481 ** This routine will drop an existing named index. This routine
3482 ** implements the DROP INDEX statement.
3484 void sqlite3DropIndex(Parse
*pParse
, SrcList
*pName
, int ifExists
){
3487 sqlite3
*db
= pParse
->db
;
3490 assert( pParse
->nErr
==0 ); /* Never called with prior errors */
3491 if( db
->mallocFailed
){
3492 goto exit_drop_index
;
3494 assert( pName
->nSrc
==1 );
3495 if( SQLITE_OK
!=sqlite3ReadSchema(pParse
) ){
3496 goto exit_drop_index
;
3498 pIndex
= sqlite3FindIndex(db
, pName
->a
[0].zName
, pName
->a
[0].zDatabase
);
3501 sqlite3ErrorMsg(pParse
, "no such index: %S", pName
, 0);
3503 sqlite3CodeVerifyNamedSchema(pParse
, pName
->a
[0].zDatabase
);
3505 pParse
->checkSchema
= 1;
3506 goto exit_drop_index
;
3508 if( pIndex
->idxType
!=SQLITE_IDXTYPE_APPDEF
){
3509 sqlite3ErrorMsg(pParse
, "index associated with UNIQUE "
3510 "or PRIMARY KEY constraint cannot be dropped", 0);
3511 goto exit_drop_index
;
3513 iDb
= sqlite3SchemaToIndex(db
, pIndex
->pSchema
);
3514 #ifndef SQLITE_OMIT_AUTHORIZATION
3516 int code
= SQLITE_DROP_INDEX
;
3517 Table
*pTab
= pIndex
->pTable
;
3518 const char *zDb
= db
->aDb
[iDb
].zDbSName
;
3519 const char *zTab
= SCHEMA_TABLE(iDb
);
3520 if( sqlite3AuthCheck(pParse
, SQLITE_DELETE
, zTab
, 0, zDb
) ){
3521 goto exit_drop_index
;
3523 if( !OMIT_TEMPDB
&& iDb
) code
= SQLITE_DROP_TEMP_INDEX
;
3524 if( sqlite3AuthCheck(pParse
, code
, pIndex
->zName
, pTab
->zName
, zDb
) ){
3525 goto exit_drop_index
;
3530 /* Generate code to remove the index and from the master table */
3531 v
= sqlite3GetVdbe(pParse
);
3533 sqlite3BeginWriteOperation(pParse
, 1, iDb
);
3534 sqlite3NestedParse(pParse
,
3535 "DELETE FROM %Q.%s WHERE name=%Q AND type='index'",
3536 db
->aDb
[iDb
].zDbSName
, MASTER_NAME
, pIndex
->zName
3538 sqlite3ClearStatTables(pParse
, iDb
, "idx", pIndex
->zName
);
3539 sqlite3ChangeCookie(pParse
, iDb
);
3540 destroyRootPage(pParse
, pIndex
->tnum
, iDb
);
3541 sqlite3VdbeAddOp4(v
, OP_DropIndex
, iDb
, 0, 0, pIndex
->zName
, 0);
3545 sqlite3SrcListDelete(db
, pName
);
3549 ** pArray is a pointer to an array of objects. Each object in the
3550 ** array is szEntry bytes in size. This routine uses sqlite3DbRealloc()
3551 ** to extend the array so that there is space for a new object at the end.
3553 ** When this function is called, *pnEntry contains the current size of
3554 ** the array (in entries - so the allocation is ((*pnEntry) * szEntry) bytes
3557 ** If the realloc() is successful (i.e. if no OOM condition occurs), the
3558 ** space allocated for the new object is zeroed, *pnEntry updated to
3559 ** reflect the new size of the array and a pointer to the new allocation
3560 ** returned. *pIdx is set to the index of the new array entry in this case.
3562 ** Otherwise, if the realloc() fails, *pIdx is set to -1, *pnEntry remains
3563 ** unchanged and a copy of pArray returned.
3565 void *sqlite3ArrayAllocate(
3566 sqlite3
*db
, /* Connection to notify of malloc failures */
3567 void *pArray
, /* Array of objects. Might be reallocated */
3568 int szEntry
, /* Size of each object in the array */
3569 int *pnEntry
, /* Number of objects currently in use */
3570 int *pIdx
/* Write the index of a new slot here */
3574 if( (n
& (n
-1))==0 ){
3575 int sz
= (n
==0) ? 1 : 2*n
;
3576 void *pNew
= sqlite3DbRealloc(db
, pArray
, sz
*szEntry
);
3584 memset(&z
[n
* szEntry
], 0, szEntry
);
3591 ** Append a new element to the given IdList. Create a new IdList if
3594 ** A new IdList is returned, or NULL if malloc() fails.
3596 IdList
*sqlite3IdListAppend(sqlite3
*db
, IdList
*pList
, Token
*pToken
){
3599 pList
= sqlite3DbMallocZero(db
, sizeof(IdList
) );
3600 if( pList
==0 ) return 0;
3602 pList
->a
= sqlite3ArrayAllocate(
3605 sizeof(pList
->a
[0]),
3610 sqlite3IdListDelete(db
, pList
);
3613 pList
->a
[i
].zName
= sqlite3NameFromToken(db
, pToken
);
3618 ** Delete an IdList.
3620 void sqlite3IdListDelete(sqlite3
*db
, IdList
*pList
){
3622 if( pList
==0 ) return;
3623 for(i
=0; i
<pList
->nId
; i
++){
3624 sqlite3DbFree(db
, pList
->a
[i
].zName
);
3626 sqlite3DbFree(db
, pList
->a
);
3627 sqlite3DbFreeNN(db
, pList
);
3631 ** Return the index in pList of the identifier named zId. Return -1
3634 int sqlite3IdListIndex(IdList
*pList
, const char *zName
){
3636 if( pList
==0 ) return -1;
3637 for(i
=0; i
<pList
->nId
; i
++){
3638 if( sqlite3StrICmp(pList
->a
[i
].zName
, zName
)==0 ) return i
;
3644 ** Expand the space allocated for the given SrcList object by
3645 ** creating nExtra new slots beginning at iStart. iStart is zero based.
3646 ** New slots are zeroed.
3648 ** For example, suppose a SrcList initially contains two entries: A,B.
3649 ** To append 3 new entries onto the end, do this:
3651 ** sqlite3SrcListEnlarge(db, pSrclist, 3, 2);
3653 ** After the call above it would contain: A, B, nil, nil, nil.
3654 ** If the iStart argument had been 1 instead of 2, then the result
3655 ** would have been: A, nil, nil, nil, B. To prepend the new slots,
3656 ** the iStart value would be 0. The result then would
3657 ** be: nil, nil, nil, A, B.
3659 ** If a memory allocation fails the SrcList is unchanged. The
3660 ** db->mallocFailed flag will be set to true.
3662 SrcList
*sqlite3SrcListEnlarge(
3663 sqlite3
*db
, /* Database connection to notify of OOM errors */
3664 SrcList
*pSrc
, /* The SrcList to be enlarged */
3665 int nExtra
, /* Number of new slots to add to pSrc->a[] */
3666 int iStart
/* Index in pSrc->a[] of first new slot */
3670 /* Sanity checking on calling parameters */
3671 assert( iStart
>=0 );
3672 assert( nExtra
>=1 );
3674 assert( iStart
<=pSrc
->nSrc
);
3676 /* Allocate additional space if needed */
3677 if( (u32
)pSrc
->nSrc
+nExtra
>pSrc
->nAlloc
){
3679 int nAlloc
= pSrc
->nSrc
*2+nExtra
;
3681 pNew
= sqlite3DbRealloc(db
, pSrc
,
3682 sizeof(*pSrc
) + (nAlloc
-1)*sizeof(pSrc
->a
[0]) );
3684 assert( db
->mallocFailed
);
3688 nGot
= (sqlite3DbMallocSize(db
, pNew
) - sizeof(*pSrc
))/sizeof(pSrc
->a
[0])+1;
3689 pSrc
->nAlloc
= nGot
;
3692 /* Move existing slots that come after the newly inserted slots
3693 ** out of the way */
3694 for(i
=pSrc
->nSrc
-1; i
>=iStart
; i
--){
3695 pSrc
->a
[i
+nExtra
] = pSrc
->a
[i
];
3697 pSrc
->nSrc
+= nExtra
;
3699 /* Zero the newly allocated slots */
3700 memset(&pSrc
->a
[iStart
], 0, sizeof(pSrc
->a
[0])*nExtra
);
3701 for(i
=iStart
; i
<iStart
+nExtra
; i
++){
3702 pSrc
->a
[i
].iCursor
= -1;
3705 /* Return a pointer to the enlarged SrcList */
3711 ** Append a new table name to the given SrcList. Create a new SrcList if
3712 ** need be. A new entry is created in the SrcList even if pTable is NULL.
3714 ** A SrcList is returned, or NULL if there is an OOM error. The returned
3715 ** SrcList might be the same as the SrcList that was input or it might be
3716 ** a new one. If an OOM error does occurs, then the prior value of pList
3717 ** that is input to this routine is automatically freed.
3719 ** If pDatabase is not null, it means that the table has an optional
3720 ** database name prefix. Like this: "database.table". The pDatabase
3721 ** points to the table name and the pTable points to the database name.
3722 ** The SrcList.a[].zName field is filled with the table name which might
3723 ** come from pTable (if pDatabase is NULL) or from pDatabase.
3724 ** SrcList.a[].zDatabase is filled with the database name from pTable,
3725 ** or with NULL if no database is specified.
3727 ** In other words, if call like this:
3729 ** sqlite3SrcListAppend(D,A,B,0);
3731 ** Then B is a table name and the database name is unspecified. If called
3734 ** sqlite3SrcListAppend(D,A,B,C);
3736 ** Then C is the table name and B is the database name. If C is defined
3737 ** then so is B. In other words, we never have a case where:
3739 ** sqlite3SrcListAppend(D,A,0,C);
3741 ** Both pTable and pDatabase are assumed to be quoted. They are dequoted
3742 ** before being added to the SrcList.
3744 SrcList
*sqlite3SrcListAppend(
3745 sqlite3
*db
, /* Connection to notify of malloc failures */
3746 SrcList
*pList
, /* Append to this SrcList. NULL creates a new SrcList */
3747 Token
*pTable
, /* Table to append */
3748 Token
*pDatabase
/* Database of the table */
3750 struct SrcList_item
*pItem
;
3751 assert( pDatabase
==0 || pTable
!=0 ); /* Cannot have C without B */
3754 pList
= sqlite3DbMallocRawNN(db
, sizeof(SrcList
) );
3755 if( pList
==0 ) return 0;
3758 memset(&pList
->a
[0], 0, sizeof(pList
->a
[0]));
3759 pList
->a
[0].iCursor
= -1;
3761 pList
= sqlite3SrcListEnlarge(db
, pList
, 1, pList
->nSrc
);
3763 if( db
->mallocFailed
){
3764 sqlite3SrcListDelete(db
, pList
);
3767 pItem
= &pList
->a
[pList
->nSrc
-1];
3768 if( pDatabase
&& pDatabase
->z
==0 ){
3772 pItem
->zName
= sqlite3NameFromToken(db
, pDatabase
);
3773 pItem
->zDatabase
= sqlite3NameFromToken(db
, pTable
);
3775 pItem
->zName
= sqlite3NameFromToken(db
, pTable
);
3776 pItem
->zDatabase
= 0;
3782 ** Assign VdbeCursor index numbers to all tables in a SrcList
3784 void sqlite3SrcListAssignCursors(Parse
*pParse
, SrcList
*pList
){
3786 struct SrcList_item
*pItem
;
3787 assert(pList
|| pParse
->db
->mallocFailed
);
3789 for(i
=0, pItem
=pList
->a
; i
<pList
->nSrc
; i
++, pItem
++){
3790 if( pItem
->iCursor
>=0 ) break;
3791 pItem
->iCursor
= pParse
->nTab
++;
3792 if( pItem
->pSelect
){
3793 sqlite3SrcListAssignCursors(pParse
, pItem
->pSelect
->pSrc
);
3800 ** Delete an entire SrcList including all its substructure.
3802 void sqlite3SrcListDelete(sqlite3
*db
, SrcList
*pList
){
3804 struct SrcList_item
*pItem
;
3805 if( pList
==0 ) return;
3806 for(pItem
=pList
->a
, i
=0; i
<pList
->nSrc
; i
++, pItem
++){
3807 sqlite3DbFree(db
, pItem
->zDatabase
);
3808 sqlite3DbFree(db
, pItem
->zName
);
3809 sqlite3DbFree(db
, pItem
->zAlias
);
3810 if( pItem
->fg
.isIndexedBy
) sqlite3DbFree(db
, pItem
->u1
.zIndexedBy
);
3811 if( pItem
->fg
.isTabFunc
) sqlite3ExprListDelete(db
, pItem
->u1
.pFuncArg
);
3812 sqlite3DeleteTable(db
, pItem
->pTab
);
3813 sqlite3SelectDelete(db
, pItem
->pSelect
);
3814 sqlite3ExprDelete(db
, pItem
->pOn
);
3815 sqlite3IdListDelete(db
, pItem
->pUsing
);
3817 sqlite3DbFreeNN(db
, pList
);
3821 ** This routine is called by the parser to add a new term to the
3822 ** end of a growing FROM clause. The "p" parameter is the part of
3823 ** the FROM clause that has already been constructed. "p" is NULL
3824 ** if this is the first term of the FROM clause. pTable and pDatabase
3825 ** are the name of the table and database named in the FROM clause term.
3826 ** pDatabase is NULL if the database name qualifier is missing - the
3827 ** usual case. If the term has an alias, then pAlias points to the
3828 ** alias token. If the term is a subquery, then pSubquery is the
3829 ** SELECT statement that the subquery encodes. The pTable and
3830 ** pDatabase parameters are NULL for subqueries. The pOn and pUsing
3831 ** parameters are the content of the ON and USING clauses.
3833 ** Return a new SrcList which encodes is the FROM with the new
3836 SrcList
*sqlite3SrcListAppendFromTerm(
3837 Parse
*pParse
, /* Parsing context */
3838 SrcList
*p
, /* The left part of the FROM clause already seen */
3839 Token
*pTable
, /* Name of the table to add to the FROM clause */
3840 Token
*pDatabase
, /* Name of the database containing pTable */
3841 Token
*pAlias
, /* The right-hand side of the AS subexpression */
3842 Select
*pSubquery
, /* A subquery used in place of a table name */
3843 Expr
*pOn
, /* The ON clause of a join */
3844 IdList
*pUsing
/* The USING clause of a join */
3846 struct SrcList_item
*pItem
;
3847 sqlite3
*db
= pParse
->db
;
3848 if( !p
&& (pOn
|| pUsing
) ){
3849 sqlite3ErrorMsg(pParse
, "a JOIN clause is required before %s",
3850 (pOn
? "ON" : "USING")
3852 goto append_from_error
;
3854 p
= sqlite3SrcListAppend(db
, p
, pTable
, pDatabase
);
3856 goto append_from_error
;
3858 assert( p
->nSrc
>0 );
3859 pItem
= &p
->a
[p
->nSrc
-1];
3860 assert( pAlias
!=0 );
3862 pItem
->zAlias
= sqlite3NameFromToken(db
, pAlias
);
3864 pItem
->pSelect
= pSubquery
;
3866 pItem
->pUsing
= pUsing
;
3871 sqlite3ExprDelete(db
, pOn
);
3872 sqlite3IdListDelete(db
, pUsing
);
3873 sqlite3SelectDelete(db
, pSubquery
);
3878 ** Add an INDEXED BY or NOT INDEXED clause to the most recently added
3879 ** element of the source-list passed as the second argument.
3881 void sqlite3SrcListIndexedBy(Parse
*pParse
, SrcList
*p
, Token
*pIndexedBy
){
3882 assert( pIndexedBy
!=0 );
3883 if( p
&& pIndexedBy
->n
>0 ){
3884 struct SrcList_item
*pItem
;
3885 assert( p
->nSrc
>0 );
3886 pItem
= &p
->a
[p
->nSrc
-1];
3887 assert( pItem
->fg
.notIndexed
==0 );
3888 assert( pItem
->fg
.isIndexedBy
==0 );
3889 assert( pItem
->fg
.isTabFunc
==0 );
3890 if( pIndexedBy
->n
==1 && !pIndexedBy
->z
){
3891 /* A "NOT INDEXED" clause was supplied. See parse.y
3892 ** construct "indexed_opt" for details. */
3893 pItem
->fg
.notIndexed
= 1;
3895 pItem
->u1
.zIndexedBy
= sqlite3NameFromToken(pParse
->db
, pIndexedBy
);
3896 pItem
->fg
.isIndexedBy
= 1;
3902 ** Add the list of function arguments to the SrcList entry for a
3903 ** table-valued-function.
3905 void sqlite3SrcListFuncArgs(Parse
*pParse
, SrcList
*p
, ExprList
*pList
){
3907 struct SrcList_item
*pItem
= &p
->a
[p
->nSrc
-1];
3908 assert( pItem
->fg
.notIndexed
==0 );
3909 assert( pItem
->fg
.isIndexedBy
==0 );
3910 assert( pItem
->fg
.isTabFunc
==0 );
3911 pItem
->u1
.pFuncArg
= pList
;
3912 pItem
->fg
.isTabFunc
= 1;
3914 sqlite3ExprListDelete(pParse
->db
, pList
);
3919 ** When building up a FROM clause in the parser, the join operator
3920 ** is initially attached to the left operand. But the code generator
3921 ** expects the join operator to be on the right operand. This routine
3922 ** Shifts all join operators from left to right for an entire FROM
3925 ** Example: Suppose the join is like this:
3927 ** A natural cross join B
3929 ** The operator is "natural cross join". The A and B operands are stored
3930 ** in p->a[0] and p->a[1], respectively. The parser initially stores the
3931 ** operator with A. This routine shifts that operator over to B.
3933 void sqlite3SrcListShiftJoinType(SrcList
*p
){
3936 for(i
=p
->nSrc
-1; i
>0; i
--){
3937 p
->a
[i
].fg
.jointype
= p
->a
[i
-1].fg
.jointype
;
3939 p
->a
[0].fg
.jointype
= 0;
3944 ** Generate VDBE code for a BEGIN statement.
3946 void sqlite3BeginTransaction(Parse
*pParse
, int type
){
3951 assert( pParse
!=0 );
3954 if( sqlite3AuthCheck(pParse
, SQLITE_TRANSACTION
, "BEGIN", 0, 0) ){
3957 v
= sqlite3GetVdbe(pParse
);
3959 if( type
!=TK_DEFERRED
){
3960 for(i
=0; i
<db
->nDb
; i
++){
3961 sqlite3VdbeAddOp2(v
, OP_Transaction
, i
, (type
==TK_EXCLUSIVE
)+1);
3962 sqlite3VdbeUsesBtree(v
, i
);
3965 sqlite3VdbeAddOp0(v
, OP_AutoCommit
);
3969 ** Generate VDBE code for a COMMIT or ROLLBACK statement.
3970 ** Code for ROLLBACK is generated if eType==TK_ROLLBACK. Otherwise
3971 ** code is generated for a COMMIT.
3973 void sqlite3EndTransaction(Parse
*pParse
, int eType
){
3977 assert( pParse
!=0 );
3978 assert( pParse
->db
!=0 );
3979 assert( eType
==TK_COMMIT
|| eType
==TK_END
|| eType
==TK_ROLLBACK
);
3980 isRollback
= eType
==TK_ROLLBACK
;
3981 if( sqlite3AuthCheck(pParse
, SQLITE_TRANSACTION
,
3982 isRollback
? "ROLLBACK" : "COMMIT", 0, 0) ){
3985 v
= sqlite3GetVdbe(pParse
);
3987 sqlite3VdbeAddOp2(v
, OP_AutoCommit
, 1, isRollback
);
3992 ** This function is called by the parser when it parses a command to create,
3993 ** release or rollback an SQL savepoint.
3995 void sqlite3Savepoint(Parse
*pParse
, int op
, Token
*pName
){
3996 char *zName
= sqlite3NameFromToken(pParse
->db
, pName
);
3998 Vdbe
*v
= sqlite3GetVdbe(pParse
);
3999 #ifndef SQLITE_OMIT_AUTHORIZATION
4000 static const char * const az
[] = { "BEGIN", "RELEASE", "ROLLBACK" };
4001 assert( !SAVEPOINT_BEGIN
&& SAVEPOINT_RELEASE
==1 && SAVEPOINT_ROLLBACK
==2 );
4003 if( !v
|| sqlite3AuthCheck(pParse
, SQLITE_SAVEPOINT
, az
[op
], zName
, 0) ){
4004 sqlite3DbFree(pParse
->db
, zName
);
4007 sqlite3VdbeAddOp4(v
, OP_Savepoint
, op
, 0, 0, zName
, P4_DYNAMIC
);
4012 ** Make sure the TEMP database is open and available for use. Return
4013 ** the number of errors. Leave any error messages in the pParse structure.
4015 int sqlite3OpenTempDatabase(Parse
*pParse
){
4016 sqlite3
*db
= pParse
->db
;
4017 if( db
->aDb
[1].pBt
==0 && !pParse
->explain
){
4020 static const int flags
=
4021 SQLITE_OPEN_READWRITE
|
4022 SQLITE_OPEN_CREATE
|
4023 SQLITE_OPEN_EXCLUSIVE
|
4024 SQLITE_OPEN_DELETEONCLOSE
|
4025 SQLITE_OPEN_TEMP_DB
;
4027 rc
= sqlite3BtreeOpen(db
->pVfs
, 0, db
, &pBt
, 0, flags
);
4028 if( rc
!=SQLITE_OK
){
4029 sqlite3ErrorMsg(pParse
, "unable to open a temporary database "
4030 "file for storing temporary tables");
4034 db
->aDb
[1].pBt
= pBt
;
4035 assert( db
->aDb
[1].pSchema
);
4036 if( SQLITE_NOMEM
==sqlite3BtreeSetPageSize(pBt
, db
->nextPagesize
, -1, 0) ){
4037 sqlite3OomFault(db
);
4045 ** Record the fact that the schema cookie will need to be verified
4046 ** for database iDb. The code to actually verify the schema cookie
4047 ** will occur at the end of the top-level VDBE and will be generated
4048 ** later, by sqlite3FinishCoding().
4050 void sqlite3CodeVerifySchema(Parse
*pParse
, int iDb
){
4051 Parse
*pToplevel
= sqlite3ParseToplevel(pParse
);
4053 assert( iDb
>=0 && iDb
<pParse
->db
->nDb
);
4054 assert( pParse
->db
->aDb
[iDb
].pBt
!=0 || iDb
==1 );
4055 assert( iDb
<SQLITE_MAX_ATTACHED
+2 );
4056 assert( sqlite3SchemaMutexHeld(pParse
->db
, iDb
, 0) );
4057 if( DbMaskTest(pToplevel
->cookieMask
, iDb
)==0 ){
4058 DbMaskSet(pToplevel
->cookieMask
, iDb
);
4059 if( !OMIT_TEMPDB
&& iDb
==1 ){
4060 sqlite3OpenTempDatabase(pToplevel
);
4066 ** If argument zDb is NULL, then call sqlite3CodeVerifySchema() for each
4067 ** attached database. Otherwise, invoke it for the database named zDb only.
4069 void sqlite3CodeVerifyNamedSchema(Parse
*pParse
, const char *zDb
){
4070 sqlite3
*db
= pParse
->db
;
4072 for(i
=0; i
<db
->nDb
; i
++){
4073 Db
*pDb
= &db
->aDb
[i
];
4074 if( pDb
->pBt
&& (!zDb
|| 0==sqlite3StrICmp(zDb
, pDb
->zDbSName
)) ){
4075 sqlite3CodeVerifySchema(pParse
, i
);
4081 ** Generate VDBE code that prepares for doing an operation that
4082 ** might change the database.
4084 ** This routine starts a new transaction if we are not already within
4085 ** a transaction. If we are already within a transaction, then a checkpoint
4086 ** is set if the setStatement parameter is true. A checkpoint should
4087 ** be set for operations that might fail (due to a constraint) part of
4088 ** the way through and which will need to undo some writes without having to
4089 ** rollback the whole transaction. For operations where all constraints
4090 ** can be checked before any changes are made to the database, it is never
4091 ** necessary to undo a write and the checkpoint should not be set.
4093 void sqlite3BeginWriteOperation(Parse
*pParse
, int setStatement
, int iDb
){
4094 Parse
*pToplevel
= sqlite3ParseToplevel(pParse
);
4095 sqlite3CodeVerifySchema(pParse
, iDb
);
4096 DbMaskSet(pToplevel
->writeMask
, iDb
);
4097 pToplevel
->isMultiWrite
|= setStatement
;
4101 ** Indicate that the statement currently under construction might write
4102 ** more than one entry (example: deleting one row then inserting another,
4103 ** inserting multiple rows in a table, or inserting a row and index entries.)
4104 ** If an abort occurs after some of these writes have completed, then it will
4105 ** be necessary to undo the completed writes.
4107 void sqlite3MultiWrite(Parse
*pParse
){
4108 Parse
*pToplevel
= sqlite3ParseToplevel(pParse
);
4109 pToplevel
->isMultiWrite
= 1;
4113 ** The code generator calls this routine if is discovers that it is
4114 ** possible to abort a statement prior to completion. In order to
4115 ** perform this abort without corrupting the database, we need to make
4116 ** sure that the statement is protected by a statement transaction.
4118 ** Technically, we only need to set the mayAbort flag if the
4119 ** isMultiWrite flag was previously set. There is a time dependency
4120 ** such that the abort must occur after the multiwrite. This makes
4121 ** some statements involving the REPLACE conflict resolution algorithm
4122 ** go a little faster. But taking advantage of this time dependency
4123 ** makes it more difficult to prove that the code is correct (in
4124 ** particular, it prevents us from writing an effective
4125 ** implementation of sqlite3AssertMayAbort()) and so we have chosen
4126 ** to take the safe route and skip the optimization.
4128 void sqlite3MayAbort(Parse
*pParse
){
4129 Parse
*pToplevel
= sqlite3ParseToplevel(pParse
);
4130 pToplevel
->mayAbort
= 1;
4134 ** Code an OP_Halt that causes the vdbe to return an SQLITE_CONSTRAINT
4135 ** error. The onError parameter determines which (if any) of the statement
4136 ** and/or current transaction is rolled back.
4138 void sqlite3HaltConstraint(
4139 Parse
*pParse
, /* Parsing context */
4140 int errCode
, /* extended error code */
4141 int onError
, /* Constraint type */
4142 char *p4
, /* Error message */
4143 i8 p4type
, /* P4_STATIC or P4_TRANSIENT */
4144 u8 p5Errmsg
/* P5_ErrMsg type */
4146 Vdbe
*v
= sqlite3GetVdbe(pParse
);
4147 assert( (errCode
&0xff)==SQLITE_CONSTRAINT
);
4148 if( onError
==OE_Abort
){
4149 sqlite3MayAbort(pParse
);
4151 sqlite3VdbeAddOp4(v
, OP_Halt
, errCode
, onError
, 0, p4
, p4type
);
4152 sqlite3VdbeChangeP5(v
, p5Errmsg
);
4156 ** Code an OP_Halt due to UNIQUE or PRIMARY KEY constraint violation.
4158 void sqlite3UniqueConstraint(
4159 Parse
*pParse
, /* Parsing context */
4160 int onError
, /* Constraint type */
4161 Index
*pIdx
/* The index that triggers the constraint */
4166 Table
*pTab
= pIdx
->pTable
;
4168 sqlite3StrAccumInit(&errMsg
, pParse
->db
, 0, 0, 200);
4169 if( pIdx
->aColExpr
){
4170 sqlite3XPrintf(&errMsg
, "index '%q'", pIdx
->zName
);
4172 for(j
=0; j
<pIdx
->nKeyCol
; j
++){
4174 assert( pIdx
->aiColumn
[j
]>=0 );
4175 zCol
= pTab
->aCol
[pIdx
->aiColumn
[j
]].zName
;
4176 if( j
) sqlite3StrAccumAppend(&errMsg
, ", ", 2);
4177 sqlite3StrAccumAppendAll(&errMsg
, pTab
->zName
);
4178 sqlite3StrAccumAppend(&errMsg
, ".", 1);
4179 sqlite3StrAccumAppendAll(&errMsg
, zCol
);
4182 zErr
= sqlite3StrAccumFinish(&errMsg
);
4183 sqlite3HaltConstraint(pParse
,
4184 IsPrimaryKeyIndex(pIdx
) ? SQLITE_CONSTRAINT_PRIMARYKEY
4185 : SQLITE_CONSTRAINT_UNIQUE
,
4186 onError
, zErr
, P4_DYNAMIC
, P5_ConstraintUnique
);
4191 ** Code an OP_Halt due to non-unique rowid.
4193 void sqlite3RowidConstraint(
4194 Parse
*pParse
, /* Parsing context */
4195 int onError
, /* Conflict resolution algorithm */
4196 Table
*pTab
/* The table with the non-unique rowid */
4200 if( pTab
->iPKey
>=0 ){
4201 zMsg
= sqlite3MPrintf(pParse
->db
, "%s.%s", pTab
->zName
,
4202 pTab
->aCol
[pTab
->iPKey
].zName
);
4203 rc
= SQLITE_CONSTRAINT_PRIMARYKEY
;
4205 zMsg
= sqlite3MPrintf(pParse
->db
, "%s.rowid", pTab
->zName
);
4206 rc
= SQLITE_CONSTRAINT_ROWID
;
4208 sqlite3HaltConstraint(pParse
, rc
, onError
, zMsg
, P4_DYNAMIC
,
4209 P5_ConstraintUnique
);
4213 ** Check to see if pIndex uses the collating sequence pColl. Return
4214 ** true if it does and false if it does not.
4216 #ifndef SQLITE_OMIT_REINDEX
4217 static int collationMatch(const char *zColl
, Index
*pIndex
){
4220 for(i
=0; i
<pIndex
->nColumn
; i
++){
4221 const char *z
= pIndex
->azColl
[i
];
4222 assert( z
!=0 || pIndex
->aiColumn
[i
]<0 );
4223 if( pIndex
->aiColumn
[i
]>=0 && 0==sqlite3StrICmp(z
, zColl
) ){
4232 ** Recompute all indices of pTab that use the collating sequence pColl.
4233 ** If pColl==0 then recompute all indices of pTab.
4235 #ifndef SQLITE_OMIT_REINDEX
4236 static void reindexTable(Parse
*pParse
, Table
*pTab
, char const *zColl
){
4237 Index
*pIndex
; /* An index associated with pTab */
4239 for(pIndex
=pTab
->pIndex
; pIndex
; pIndex
=pIndex
->pNext
){
4240 if( zColl
==0 || collationMatch(zColl
, pIndex
) ){
4241 int iDb
= sqlite3SchemaToIndex(pParse
->db
, pTab
->pSchema
);
4242 sqlite3BeginWriteOperation(pParse
, 0, iDb
);
4243 sqlite3RefillIndex(pParse
, pIndex
, -1);
4250 ** Recompute all indices of all tables in all databases where the
4251 ** indices use the collating sequence pColl. If pColl==0 then recompute
4252 ** all indices everywhere.
4254 #ifndef SQLITE_OMIT_REINDEX
4255 static void reindexDatabases(Parse
*pParse
, char const *zColl
){
4256 Db
*pDb
; /* A single database */
4257 int iDb
; /* The database index number */
4258 sqlite3
*db
= pParse
->db
; /* The database connection */
4259 HashElem
*k
; /* For looping over tables in pDb */
4260 Table
*pTab
; /* A table in the database */
4262 assert( sqlite3BtreeHoldsAllMutexes(db
) ); /* Needed for schema access */
4263 for(iDb
=0, pDb
=db
->aDb
; iDb
<db
->nDb
; iDb
++, pDb
++){
4265 for(k
=sqliteHashFirst(&pDb
->pSchema
->tblHash
); k
; k
=sqliteHashNext(k
)){
4266 pTab
= (Table
*)sqliteHashData(k
);
4267 reindexTable(pParse
, pTab
, zColl
);
4274 ** Generate code for the REINDEX command.
4277 ** REINDEX <collation> -- 2
4278 ** REINDEX ?<database>.?<tablename> -- 3
4279 ** REINDEX ?<database>.?<indexname> -- 4
4281 ** Form 1 causes all indices in all attached databases to be rebuilt.
4282 ** Form 2 rebuilds all indices in all databases that use the named
4283 ** collating function. Forms 3 and 4 rebuild the named index or all
4284 ** indices associated with the named table.
4286 #ifndef SQLITE_OMIT_REINDEX
4287 void sqlite3Reindex(Parse
*pParse
, Token
*pName1
, Token
*pName2
){
4288 CollSeq
*pColl
; /* Collating sequence to be reindexed, or NULL */
4289 char *z
; /* Name of a table or index */
4290 const char *zDb
; /* Name of the database */
4291 Table
*pTab
; /* A table in the database */
4292 Index
*pIndex
; /* An index associated with pTab */
4293 int iDb
; /* The database index number */
4294 sqlite3
*db
= pParse
->db
; /* The database connection */
4295 Token
*pObjName
; /* Name of the table or index to be reindexed */
4297 /* Read the database schema. If an error occurs, leave an error message
4298 ** and code in pParse and return NULL. */
4299 if( SQLITE_OK
!=sqlite3ReadSchema(pParse
) ){
4304 reindexDatabases(pParse
, 0);
4306 }else if( NEVER(pName2
==0) || pName2
->z
==0 ){
4308 assert( pName1
->z
);
4309 zColl
= sqlite3NameFromToken(pParse
->db
, pName1
);
4310 if( !zColl
) return;
4311 pColl
= sqlite3FindCollSeq(db
, ENC(db
), zColl
, 0);
4313 reindexDatabases(pParse
, zColl
);
4314 sqlite3DbFree(db
, zColl
);
4317 sqlite3DbFree(db
, zColl
);
4319 iDb
= sqlite3TwoPartName(pParse
, pName1
, pName2
, &pObjName
);
4321 z
= sqlite3NameFromToken(db
, pObjName
);
4323 zDb
= db
->aDb
[iDb
].zDbSName
;
4324 pTab
= sqlite3FindTable(db
, z
, zDb
);
4326 reindexTable(pParse
, pTab
, 0);
4327 sqlite3DbFree(db
, z
);
4330 pIndex
= sqlite3FindIndex(db
, z
, zDb
);
4331 sqlite3DbFree(db
, z
);
4333 sqlite3BeginWriteOperation(pParse
, 0, iDb
);
4334 sqlite3RefillIndex(pParse
, pIndex
, -1);
4337 sqlite3ErrorMsg(pParse
, "unable to identify the object to be reindexed");
4342 ** Return a KeyInfo structure that is appropriate for the given Index.
4344 ** The caller should invoke sqlite3KeyInfoUnref() on the returned object
4345 ** when it has finished using it.
4347 KeyInfo
*sqlite3KeyInfoOfIndex(Parse
*pParse
, Index
*pIdx
){
4349 int nCol
= pIdx
->nColumn
;
4350 int nKey
= pIdx
->nKeyCol
;
4352 if( pParse
->nErr
) return 0;
4353 if( pIdx
->uniqNotNull
){
4354 pKey
= sqlite3KeyInfoAlloc(pParse
->db
, nKey
, nCol
-nKey
);
4356 pKey
= sqlite3KeyInfoAlloc(pParse
->db
, nCol
, 0);
4359 assert( sqlite3KeyInfoIsWriteable(pKey
) );
4360 for(i
=0; i
<nCol
; i
++){
4361 const char *zColl
= pIdx
->azColl
[i
];
4362 pKey
->aColl
[i
] = zColl
==sqlite3StrBINARY
? 0 :
4363 sqlite3LocateCollSeq(pParse
, zColl
);
4364 pKey
->aSortOrder
[i
] = pIdx
->aSortOrder
[i
];
4367 sqlite3KeyInfoUnref(pKey
);
4374 #ifndef SQLITE_OMIT_CTE
4376 ** This routine is invoked once per CTE by the parser while parsing a
4379 With
*sqlite3WithAdd(
4380 Parse
*pParse
, /* Parsing context */
4381 With
*pWith
, /* Existing WITH clause, or NULL */
4382 Token
*pName
, /* Name of the common-table */
4383 ExprList
*pArglist
, /* Optional column name list for the table */
4384 Select
*pQuery
/* Query used to initialize the table */
4386 sqlite3
*db
= pParse
->db
;
4390 /* Check that the CTE name is unique within this WITH clause. If
4391 ** not, store an error in the Parse structure. */
4392 zName
= sqlite3NameFromToken(pParse
->db
, pName
);
4393 if( zName
&& pWith
){
4395 for(i
=0; i
<pWith
->nCte
; i
++){
4396 if( sqlite3StrICmp(zName
, pWith
->a
[i
].zName
)==0 ){
4397 sqlite3ErrorMsg(pParse
, "duplicate WITH table name: %s", zName
);
4403 int nByte
= sizeof(*pWith
) + (sizeof(pWith
->a
[1]) * pWith
->nCte
);
4404 pNew
= sqlite3DbRealloc(db
, pWith
, nByte
);
4406 pNew
= sqlite3DbMallocZero(db
, sizeof(*pWith
));
4408 assert( (pNew
!=0 && zName
!=0) || db
->mallocFailed
);
4410 if( db
->mallocFailed
){
4411 sqlite3ExprListDelete(db
, pArglist
);
4412 sqlite3SelectDelete(db
, pQuery
);
4413 sqlite3DbFree(db
, zName
);
4416 pNew
->a
[pNew
->nCte
].pSelect
= pQuery
;
4417 pNew
->a
[pNew
->nCte
].pCols
= pArglist
;
4418 pNew
->a
[pNew
->nCte
].zName
= zName
;
4419 pNew
->a
[pNew
->nCte
].zCteErr
= 0;
4427 ** Free the contents of the With object passed as the second argument.
4429 void sqlite3WithDelete(sqlite3
*db
, With
*pWith
){
4432 for(i
=0; i
<pWith
->nCte
; i
++){
4433 struct Cte
*pCte
= &pWith
->a
[i
];
4434 sqlite3ExprListDelete(db
, pCte
->pCols
);
4435 sqlite3SelectDelete(db
, pCte
->pSelect
);
4436 sqlite3DbFree(db
, pCte
->zName
);
4438 sqlite3DbFree(db
, pWith
);
4441 #endif /* !defined(SQLITE_OMIT_CTE) */