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1/*
2** 2003 April 6
3**
4** The author disclaims copyright to this source code. In place of
5** a legal notice, here is a blessing:
6**
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.
10**
11*************************************************************************
12** This file contains code used to implement the PRAGMA command.
13**
14** $Id: pragma.c,v 1.149 2007/08/31 18:34:59 drh Exp $
15*/
16#include "sqliteInt.h"
17#include <ctype.h>
18
19/* Ignore this whole file if pragmas are disabled
20*/
21#if !defined(SQLITE_OMIT_PRAGMA) && !defined(SQLITE_OMIT_PARSER)
22
23/*
24** Interpret the given string as a safety level. Return 0 for OFF,
25** 1 for ON or NORMAL and 2 for FULL. Return 1 for an empty or
26** unrecognized string argument.
27**
28** Note that the values returned are one less that the values that
29** should be passed into sqlite3BtreeSetSafetyLevel(). The is done
30** to support legacy SQL code. The safety level used to be boolean
31** and older scripts may have used numbers 0 for OFF and 1 for ON.
32*/
33static int getSafetyLevel(const char *z){
34 /* 123456789 123456789 */
35 static const char zText[] = "onoffalseyestruefull";
36 static const u8 iOffset[] = {0, 1, 2, 4, 9, 12, 16};
37 static const u8 iLength[] = {2, 2, 3, 5, 3, 4, 4};
38 static const u8 iValue[] = {1, 0, 0, 0, 1, 1, 2};
39 int i, n;
40 if( isdigit(*z) ){
41 return atoi(z);
42 }
43 n = strlen(z);
44 for(i=0; i<sizeof(iLength); i++){
45 if( iLength[i]==n && sqlite3StrNICmp(&zText[iOffset[i]],z,n)==0 ){
46 return iValue[i];
47 }
48 }
49 return 1;
50}
51
52/*
53** Interpret the given string as a boolean value.
54*/
55static int getBoolean(const char *z){
56 return getSafetyLevel(z)&1;
57}
58
59/*
60** Interpret the given string as a locking mode value.
61*/
62static int getLockingMode(const char *z){
63 if( z ){
64 if( 0==sqlite3StrICmp(z, "exclusive") ) return PAGER_LOCKINGMODE_EXCLUSIVE;
65 if( 0==sqlite3StrICmp(z, "normal") ) return PAGER_LOCKINGMODE_NORMAL;
66 }
67 return PAGER_LOCKINGMODE_QUERY;
68}
69
70#ifndef SQLITE_OMIT_AUTOVACUUM
71/*
72** Interpret the given string as an auto-vacuum mode value.
73**
74** The following strings, "none", "full" and "incremental" are
75** acceptable, as are their numeric equivalents: 0, 1 and 2 respectively.
76*/
77static int getAutoVacuum(const char *z){
78 int i;
79 if( 0==sqlite3StrICmp(z, "none") ) return BTREE_AUTOVACUUM_NONE;
80 if( 0==sqlite3StrICmp(z, "full") ) return BTREE_AUTOVACUUM_FULL;
81 if( 0==sqlite3StrICmp(z, "incremental") ) return BTREE_AUTOVACUUM_INCR;
82 i = atoi(z);
83 return ((i>=0&&i<=2)?i:0);
84}
85#endif /* ifndef SQLITE_OMIT_AUTOVACUUM */
86
87#ifndef SQLITE_OMIT_PAGER_PRAGMAS
88/*
89** Interpret the given string as a temp db location. Return 1 for file
90** backed temporary databases, 2 for the Red-Black tree in memory database
91** and 0 to use the compile-time default.
92*/
93static int getTempStore(const char *z){
94 if( z[0]>='0' && z[0]<='2' ){
95 return z[0] - '0';
96 }else if( sqlite3StrICmp(z, "file")==0 ){
97 return 1;
98 }else if( sqlite3StrICmp(z, "memory")==0 ){
99 return 2;
100 }else{
101 return 0;
102 }
103}
104#endif /* SQLITE_PAGER_PRAGMAS */
105
106#ifndef SQLITE_OMIT_PAGER_PRAGMAS
107/*
108** Invalidate temp storage, either when the temp storage is changed
109** from default, or when 'file' and the temp_store_directory has changed
110*/
111static int invalidateTempStorage(Parse *pParse){
112 sqlite3 *db = pParse->db;
113 if( db->aDb[1].pBt!=0 ){
114 if( !db->autoCommit ){
115 sqlite3ErrorMsg(pParse, "temporary storage cannot be changed "
116 "from within a transaction");
117 return SQLITE_ERROR;
118 }
119 sqlite3BtreeClose(db->aDb[1].pBt);
120 db->aDb[1].pBt = 0;
121 sqlite3ResetInternalSchema(db, 0);
122 }
123 return SQLITE_OK;
124}
125#endif /* SQLITE_PAGER_PRAGMAS */
126
127#ifndef SQLITE_OMIT_PAGER_PRAGMAS
128/*
129** If the TEMP database is open, close it and mark the database schema
130** as needing reloading. This must be done when using the TEMP_STORE
131** or DEFAULT_TEMP_STORE pragmas.
132*/
133static int changeTempStorage(Parse *pParse, const char *zStorageType){
134 int ts = getTempStore(zStorageType);
135 sqlite3 *db = pParse->db;
136 if( db->temp_store==ts ) return SQLITE_OK;
137 if( invalidateTempStorage( pParse ) != SQLITE_OK ){
138 return SQLITE_ERROR;
139 }
140 db->temp_store = ts;
141 return SQLITE_OK;
142}
143#endif /* SQLITE_PAGER_PRAGMAS */
144
145/*
146** Generate code to return a single integer value.
147*/
148static void returnSingleInt(Parse *pParse, const char *zLabel, int value){
149 Vdbe *v = sqlite3GetVdbe(pParse);
150 sqlite3VdbeAddOp(v, OP_Integer, value, 0);
151 if( pParse->explain==0 ){
152 sqlite3VdbeSetNumCols(v, 1);
153 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLabel, P3_STATIC);
154 }
155 sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
156}
157
158#ifndef SQLITE_OMIT_FLAG_PRAGMAS
159/*
160** Check to see if zRight and zLeft refer to a pragma that queries
161** or changes one of the flags in db->flags. Return 1 if so and 0 if not.
162** Also, implement the pragma.
163*/
164static int flagPragma(Parse *pParse, const char *zLeft, const char *zRight){
165 static const struct sPragmaType {
166 const char *zName; /* Name of the pragma */
167 int mask; /* Mask for the db->flags value */
168 } aPragma[] = {
169 { "full_column_names", SQLITE_FullColNames },
170 { "short_column_names", SQLITE_ShortColNames },
171 { "count_changes", SQLITE_CountRows },
172 { "empty_result_callbacks", SQLITE_NullCallback },
173 { "legacy_file_format", SQLITE_LegacyFileFmt },
174 { "fullfsync", SQLITE_FullFSync },
175#ifdef SQLITE_DEBUG
176 { "sql_trace", SQLITE_SqlTrace },
177 { "vdbe_listing", SQLITE_VdbeListing },
178 { "vdbe_trace", SQLITE_VdbeTrace },
179#endif
180#ifndef SQLITE_OMIT_CHECK
181 { "ignore_check_constraints", SQLITE_IgnoreChecks },
182#endif
183 /* The following is VERY experimental */
184 { "writable_schema", SQLITE_WriteSchema|SQLITE_RecoveryMode },
185 { "omit_readlock", SQLITE_NoReadlock },
186
187 /* TODO: Maybe it shouldn't be possible to change the ReadUncommitted
188 ** flag if there are any active statements. */
189 { "read_uncommitted", SQLITE_ReadUncommitted },
190 };
191 int i;
192 const struct sPragmaType *p;
193 for(i=0, p=aPragma; i<sizeof(aPragma)/sizeof(aPragma[0]); i++, p++){
194 if( sqlite3StrICmp(zLeft, p->zName)==0 ){
195 sqlite3 *db = pParse->db;
196 Vdbe *v;
197 v = sqlite3GetVdbe(pParse);
198 if( v ){
199 if( zRight==0 ){
200 returnSingleInt(pParse, p->zName, (db->flags & p->mask)!=0 );
201 }else{
202 if( getBoolean(zRight) ){
203 db->flags |= p->mask;
204 }else{
205 db->flags &= ~p->mask;
206 }
207 }
208 }
209 return 1;
210 }
211 }
212 return 0;
213}
214#endif /* SQLITE_OMIT_FLAG_PRAGMAS */
215
216/*
217** Process a pragma statement.
218**
219** Pragmas are of this form:
220**
221** PRAGMA [database.]id [= value]
222**
223** The identifier might also be a string. The value is a string, and
224** identifier, or a number. If minusFlag is true, then the value is
225** a number that was preceded by a minus sign.
226**
227** If the left side is "database.id" then pId1 is the database name
228** and pId2 is the id. If the left side is just "id" then pId1 is the
229** id and pId2 is any empty string.
230*/
231void sqlite3Pragma(
232 Parse *pParse,
233 Token *pId1, /* First part of [database.]id field */
234 Token *pId2, /* Second part of [database.]id field, or NULL */
235 Token *pValue, /* Token for <value>, or NULL */
236 int minusFlag /* True if a '-' sign preceded <value> */
237){
238 char *zLeft = 0; /* Nul-terminated UTF-8 string <id> */
239 char *zRight = 0; /* Nul-terminated UTF-8 string <value>, or NULL */
240 const char *zDb = 0; /* The database name */
241 Token *pId; /* Pointer to <id> token */
242 int iDb; /* Database index for <database> */
243 sqlite3 *db = pParse->db;
244 Db *pDb;
245 Vdbe *v = sqlite3GetVdbe(pParse);
246 if( v==0 ) return;
247
248 /* Interpret the [database.] part of the pragma statement. iDb is the
249 ** index of the database this pragma is being applied to in db.aDb[]. */
250 iDb = sqlite3TwoPartName(pParse, pId1, pId2, &pId);
251 if( iDb<0 ) return;
252 pDb = &db->aDb[iDb];
253
254 /* If the temp database has been explicitly named as part of the
255 ** pragma, make sure it is open.
256 */
257 if( iDb==1 && sqlite3OpenTempDatabase(pParse) ){
258 return;
259 }
260
261 zLeft = sqlite3NameFromToken(db, pId);
262 if( !zLeft ) return;
263 if( minusFlag ){
264 zRight = sqlite3MPrintf(db, "-%T", pValue);
265 }else{
266 zRight = sqlite3NameFromToken(db, pValue);
267 }
268
269 zDb = ((iDb>0)?pDb->zName:0);
270 if( sqlite3AuthCheck(pParse, SQLITE_PRAGMA, zLeft, zRight, zDb) ){
271 goto pragma_out;
272 }
273
274#ifndef SQLITE_OMIT_PAGER_PRAGMAS
275 /*
276 ** PRAGMA [database.]default_cache_size
277 ** PRAGMA [database.]default_cache_size=N
278 **
279 ** The first form reports the current persistent setting for the
280 ** page cache size. The value returned is the maximum number of
281 ** pages in the page cache. The second form sets both the current
282 ** page cache size value and the persistent page cache size value
283 ** stored in the database file.
284 **
285 ** The default cache size is stored in meta-value 2 of page 1 of the
286 ** database file. The cache size is actually the absolute value of
287 ** this memory location. The sign of meta-value 2 determines the
288 ** synchronous setting. A negative value means synchronous is off
289 ** and a positive value means synchronous is on.
290 */
291 if( sqlite3StrICmp(zLeft,"default_cache_size")==0 ){
292 static const VdbeOpList getCacheSize[] = {
293 { OP_ReadCookie, 0, 2, 0}, /* 0 */
294 { OP_AbsValue, 0, 0, 0},
295 { OP_Dup, 0, 0, 0},
296 { OP_Integer, 0, 0, 0},
297 { OP_Ne, 0, 6, 0},
298 { OP_Integer, 0, 0, 0}, /* 5 */
299 { OP_Callback, 1, 0, 0},
300 };
301 int addr;
302 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
303 sqlite3VdbeUsesBtree(v, iDb);
304 if( !zRight ){
305 sqlite3VdbeSetNumCols(v, 1);
306 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cache_size", P3_STATIC);
307 addr = sqlite3VdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
308 sqlite3VdbeChangeP1(v, addr, iDb);
309 sqlite3VdbeChangeP1(v, addr+5, SQLITE_DEFAULT_CACHE_SIZE);
310 }else{
311 int size = atoi(zRight);
312 if( size<0 ) size = -size;
313 sqlite3BeginWriteOperation(pParse, 0, iDb);
314 sqlite3VdbeAddOp(v, OP_Integer, size, 0);
315 sqlite3VdbeAddOp(v, OP_ReadCookie, iDb, 2);
316 addr = sqlite3VdbeAddOp(v, OP_Integer, 0, 0);
317 sqlite3VdbeAddOp(v, OP_Ge, 0, addr+3);
318 sqlite3VdbeAddOp(v, OP_Negative, 0, 0);
319 sqlite3VdbeAddOp(v, OP_SetCookie, iDb, 2);
320 pDb->pSchema->cache_size = size;
321 sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
322 }
323 }else
324
325 /*
326 ** PRAGMA [database.]page_size
327 ** PRAGMA [database.]page_size=N
328 **
329 ** The first form reports the current setting for the
330 ** database page size in bytes. The second form sets the
331 ** database page size value. The value can only be set if
332 ** the database has not yet been created.
333 */
334 if( sqlite3StrICmp(zLeft,"page_size")==0 ){
335 Btree *pBt = pDb->pBt;
336 if( !zRight ){
337 int size = pBt ? sqlite3BtreeGetPageSize(pBt) : 0;
338 returnSingleInt(pParse, "page_size", size);
339 }else{
340 /* Malloc may fail when setting the page-size, as there is an internal
341 ** buffer that the pager module resizes using sqlite3_realloc().
342 */
343 if( SQLITE_NOMEM==sqlite3BtreeSetPageSize(pBt, atoi(zRight), -1) ){
344 db->mallocFailed = 1;
345 }
346 }
347 }else
348
349 /*
350 ** PRAGMA [database.]max_page_count
351 ** PRAGMA [database.]max_page_count=N
352 **
353 ** The first form reports the current setting for the
354 ** maximum number of pages in the database file. The
355 ** second form attempts to change this setting. Both
356 ** forms return the current setting.
357 */
358 if( sqlite3StrICmp(zLeft,"max_page_count")==0 ){
359 Btree *pBt = pDb->pBt;
360 int newMax = 0;
361 if( zRight ){
362 newMax = atoi(zRight);
363 }
364 if( pBt ){
365 newMax = sqlite3BtreeMaxPageCount(pBt, newMax);
366 }
367 returnSingleInt(pParse, "max_page_count", newMax);
368 }else
369
370 /*
371 ** PRAGMA [database.]locking_mode
372 ** PRAGMA [database.]locking_mode = (normal|exclusive)
373 */
374 if( sqlite3StrICmp(zLeft,"locking_mode")==0 ){
375 const char *zRet = "normal";
376 int eMode = getLockingMode(zRight);
377
378 if( pId2->n==0 && eMode==PAGER_LOCKINGMODE_QUERY ){
379 /* Simple "PRAGMA locking_mode;" statement. This is a query for
380 ** the current default locking mode (which may be different to
381 ** the locking-mode of the main database).
382 */
383 eMode = db->dfltLockMode;
384 }else{
385 Pager *pPager;
386 if( pId2->n==0 ){
387 /* This indicates that no database name was specified as part
388 ** of the PRAGMA command. In this case the locking-mode must be
389 ** set on all attached databases, as well as the main db file.
390 **
391 ** Also, the sqlite3.dfltLockMode variable is set so that
392 ** any subsequently attached databases also use the specified
393 ** locking mode.
394 */
395 int ii;
396 assert(pDb==&db->aDb[0]);
397 for(ii=2; ii<db->nDb; ii++){
398 pPager = sqlite3BtreePager(db->aDb[ii].pBt);
399 sqlite3PagerLockingMode(pPager, eMode);
400 }
401 db->dfltLockMode = eMode;
402 }
403 pPager = sqlite3BtreePager(pDb->pBt);
404 eMode = sqlite3PagerLockingMode(pPager, eMode);
405 }
406
407 assert(eMode==PAGER_LOCKINGMODE_NORMAL||eMode==PAGER_LOCKINGMODE_EXCLUSIVE);
408 if( eMode==PAGER_LOCKINGMODE_EXCLUSIVE ){
409 zRet = "exclusive";
410 }
411 sqlite3VdbeSetNumCols(v, 1);
412 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "locking_mode", P3_STATIC);
413 sqlite3VdbeOp3(v, OP_String8, 0, 0, zRet, 0);
414 sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
415 }else
416#endif /* SQLITE_OMIT_PAGER_PRAGMAS */
417
418 /*
419 ** PRAGMA [database.]auto_vacuum
420 ** PRAGMA [database.]auto_vacuum=N
421 **
422 ** Get or set the (boolean) value of the database 'auto-vacuum' parameter.
423 */
424#ifndef SQLITE_OMIT_AUTOVACUUM
425 if( sqlite3StrICmp(zLeft,"auto_vacuum")==0 ){
426 Btree *pBt = pDb->pBt;
427 if( sqlite3ReadSchema(pParse) ){
428 goto pragma_out;
429 }
430 if( !zRight ){
431 int auto_vacuum =
432 pBt ? sqlite3BtreeGetAutoVacuum(pBt) : SQLITE_DEFAULT_AUTOVACUUM;
433 returnSingleInt(pParse, "auto_vacuum", auto_vacuum);
434 }else{
435 int eAuto = getAutoVacuum(zRight);
436 if( eAuto>=0 ){
437 /* Call SetAutoVacuum() to set initialize the internal auto and
438 ** incr-vacuum flags. This is required in case this connection
439 ** creates the database file. It is important that it is created
440 ** as an auto-vacuum capable db.
441 */
442 int rc = sqlite3BtreeSetAutoVacuum(pBt, eAuto);
443 if( rc==SQLITE_OK && (eAuto==1 || eAuto==2) ){
444 /* When setting the auto_vacuum mode to either "full" or
445 ** "incremental", write the value of meta[6] in the database
446 ** file. Before writing to meta[6], check that meta[3] indicates
447 ** that this really is an auto-vacuum capable database.
448 */
449 static const VdbeOpList setMeta6[] = {
450 { OP_Transaction, 0, 1, 0}, /* 0 */
451 { OP_ReadCookie, 0, 3, 0}, /* 1 */
452 { OP_If, 0, 0, 0}, /* 2 */
453 { OP_Halt, SQLITE_OK, OE_Abort, 0}, /* 3 */
454 { OP_Integer, 0, 0, 0}, /* 4 */
455 { OP_SetCookie, 0, 6, 0}, /* 5 */
456 };
457 int iAddr;
458 iAddr = sqlite3VdbeAddOpList(v, ArraySize(setMeta6), setMeta6);
459 sqlite3VdbeChangeP1(v, iAddr, iDb);
460 sqlite3VdbeChangeP1(v, iAddr+1, iDb);
461 sqlite3VdbeChangeP2(v, iAddr+2, iAddr+4);
462 sqlite3VdbeChangeP1(v, iAddr+4, eAuto-1);
463 sqlite3VdbeChangeP1(v, iAddr+5, iDb);
464 sqlite3VdbeUsesBtree(v, iDb);
465 }
466 }
467 }
468 }else
469#endif
470
471 /*
472 ** PRAGMA [database.]incremental_vacuum(N)
473 **
474 ** Do N steps of incremental vacuuming on a database.
475 */
476#ifndef SQLITE_OMIT_AUTOVACUUM
477 if( sqlite3StrICmp(zLeft,"incremental_vacuum")==0 ){
478 int iLimit, addr;
479 if( sqlite3ReadSchema(pParse) ){
480 goto pragma_out;
481 }
482 if( zRight==0 || !sqlite3GetInt32(zRight, &iLimit) || iLimit<=0 ){
483 iLimit = 0x7fffffff;
484 }
485 sqlite3BeginWriteOperation(pParse, 0, iDb);
486 sqlite3VdbeAddOp(v, OP_MemInt, iLimit, 0);
487 addr = sqlite3VdbeAddOp(v, OP_IncrVacuum, iDb, 0);
488 sqlite3VdbeAddOp(v, OP_Callback, 0, 0);
489 sqlite3VdbeAddOp(v, OP_MemIncr, -1, 0);
490 sqlite3VdbeAddOp(v, OP_IfMemPos, 0, addr);
491 sqlite3VdbeJumpHere(v, addr);
492 }else
493#endif
494
495#ifndef SQLITE_OMIT_PAGER_PRAGMAS
496 /*
497 ** PRAGMA [database.]cache_size
498 ** PRAGMA [database.]cache_size=N
499 **
500 ** The first form reports the current local setting for the
501 ** page cache size. The local setting can be different from
502 ** the persistent cache size value that is stored in the database
503 ** file itself. The value returned is the maximum number of
504 ** pages in the page cache. The second form sets the local
505 ** page cache size value. It does not change the persistent
506 ** cache size stored on the disk so the cache size will revert
507 ** to its default value when the database is closed and reopened.
508 ** N should be a positive integer.
509 */
510 if( sqlite3StrICmp(zLeft,"cache_size")==0 ){
511 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
512 if( !zRight ){
513 returnSingleInt(pParse, "cache_size", pDb->pSchema->cache_size);
514 }else{
515 int size = atoi(zRight);
516 if( size<0 ) size = -size;
517 pDb->pSchema->cache_size = size;
518 sqlite3BtreeSetCacheSize(pDb->pBt, pDb->pSchema->cache_size);
519 }
520 }else
521
522 /*
523 ** PRAGMA temp_store
524 ** PRAGMA temp_store = "default"|"memory"|"file"
525 **
526 ** Return or set the local value of the temp_store flag. Changing
527 ** the local value does not make changes to the disk file and the default
528 ** value will be restored the next time the database is opened.
529 **
530 ** Note that it is possible for the library compile-time options to
531 ** override this setting
532 */
533 if( sqlite3StrICmp(zLeft, "temp_store")==0 ){
534 if( !zRight ){
535 returnSingleInt(pParse, "temp_store", db->temp_store);
536 }else{
537 changeTempStorage(pParse, zRight);
538 }
539 }else
540
541 /*
542 ** PRAGMA temp_store_directory
543 ** PRAGMA temp_store_directory = ""|"directory_name"
544 **
545 ** Return or set the local value of the temp_store_directory flag. Changing
546 ** the value sets a specific directory to be used for temporary files.
547 ** Setting to a null string reverts to the default temporary directory search.
548 ** If temporary directory is changed, then invalidateTempStorage.
549 **
550 */
551 if( sqlite3StrICmp(zLeft, "temp_store_directory")==0 ){
552 if( !zRight ){
553 if( sqlite3_temp_directory ){
554 sqlite3VdbeSetNumCols(v, 1);
555 sqlite3VdbeSetColName(v, 0, COLNAME_NAME,
556 "temp_store_directory", P3_STATIC);
557 sqlite3VdbeOp3(v, OP_String8, 0, 0, sqlite3_temp_directory, 0);
558 sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
559 }
560 }else{
561 if( zRight[0]
562 && !sqlite3OsAccess(db->pVfs, zRight, SQLITE_ACCESS_READWRITE)
563 ){
564 sqlite3ErrorMsg(pParse, "not a writable directory");
565 goto pragma_out;
566 }
567 if( TEMP_STORE==0
568 || (TEMP_STORE==1 && db->temp_store<=1)
569 || (TEMP_STORE==2 && db->temp_store==1)
570 ){
571 invalidateTempStorage(pParse);
572 }
573 sqlite3_free(sqlite3_temp_directory);
574 if( zRight[0] ){
575 sqlite3_temp_directory = zRight;
576 zRight = 0;
577 }else{
578 sqlite3_temp_directory = 0;
579 }
580 }
581 }else
582
583 /*
584 ** PRAGMA [database.]synchronous
585 ** PRAGMA [database.]synchronous=OFF|ON|NORMAL|FULL
586 **
587 ** Return or set the local value of the synchronous flag. Changing
588 ** the local value does not make changes to the disk file and the
589 ** default value will be restored the next time the database is
590 ** opened.
591 */
592 if( sqlite3StrICmp(zLeft,"synchronous")==0 ){
593 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
594 if( !zRight ){
595 returnSingleInt(pParse, "synchronous", pDb->safety_level-1);
596 }else{
597 if( !db->autoCommit ){
598 sqlite3ErrorMsg(pParse,
599 "Safety level may not be changed inside a transaction");
600 }else{
601 pDb->safety_level = getSafetyLevel(zRight)+1;
602 }
603 }
604 }else
605#endif /* SQLITE_OMIT_PAGER_PRAGMAS */
606
607#ifndef SQLITE_OMIT_FLAG_PRAGMAS
608 if( flagPragma(pParse, zLeft, zRight) ){
609 /* The flagPragma() subroutine also generates any necessary code
610 ** there is nothing more to do here */
611 }else
612#endif /* SQLITE_OMIT_FLAG_PRAGMAS */
613
614#ifndef SQLITE_OMIT_SCHEMA_PRAGMAS
615 /*
616 ** PRAGMA table_info(<table>)
617 **
618 ** Return a single row for each column of the named table. The columns of
619 ** the returned data set are:
620 **
621 ** cid: Column id (numbered from left to right, starting at 0)
622 ** name: Column name
623 ** type: Column declaration type.
624 ** notnull: True if 'NOT NULL' is part of column declaration
625 ** dflt_value: The default value for the column, if any.
626 */
627 if( sqlite3StrICmp(zLeft, "table_info")==0 && zRight ){
628 Table *pTab;
629 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
630 pTab = sqlite3FindTable(db, zRight, zDb);
631 if( pTab ){
632 int i;
633 int nHidden = 0;
634 Column *pCol;
635 sqlite3VdbeSetNumCols(v, 6);
636 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cid", P3_STATIC);
637 sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P3_STATIC);
638 sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "type", P3_STATIC);
639 sqlite3VdbeSetColName(v, 3, COLNAME_NAME, "notnull", P3_STATIC);
640 sqlite3VdbeSetColName(v, 4, COLNAME_NAME, "dflt_value", P3_STATIC);
641 sqlite3VdbeSetColName(v, 5, COLNAME_NAME, "pk", P3_STATIC);
642 sqlite3ViewGetColumnNames(pParse, pTab);
643 for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
644 const Token *pDflt;
645 if( IsHiddenColumn(pCol) ){
646 nHidden++;
647 continue;
648 }
649 sqlite3VdbeAddOp(v, OP_Integer, i-nHidden, 0);
650 sqlite3VdbeOp3(v, OP_String8, 0, 0, pCol->zName, 0);
651 sqlite3VdbeOp3(v, OP_String8, 0, 0,
652 pCol->zType ? pCol->zType : "", 0);
653 sqlite3VdbeAddOp(v, OP_Integer, pCol->notNull, 0);
654 if( pCol->pDflt && (pDflt = &pCol->pDflt->span)->z ){
655 sqlite3VdbeOp3(v, OP_String8, 0, 0, (char*)pDflt->z, pDflt->n);
656 }else{
657 sqlite3VdbeAddOp(v, OP_Null, 0, 0);
658 }
659 sqlite3VdbeAddOp(v, OP_Integer, pCol->isPrimKey, 0);
660 sqlite3VdbeAddOp(v, OP_Callback, 6, 0);
661 }
662 }
663 }else
664
665 if( sqlite3StrICmp(zLeft, "index_info")==0 && zRight ){
666 Index *pIdx;
667 Table *pTab;
668 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
669 pIdx = sqlite3FindIndex(db, zRight, zDb);
670 if( pIdx ){
671 int i;
672 pTab = pIdx->pTable;
673 sqlite3VdbeSetNumCols(v, 3);
674 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seqno", P3_STATIC);
675 sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "cid", P3_STATIC);
676 sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "name", P3_STATIC);
677 for(i=0; i<pIdx->nColumn; i++){
678 int cnum = pIdx->aiColumn[i];
679 sqlite3VdbeAddOp(v, OP_Integer, i, 0);
680 sqlite3VdbeAddOp(v, OP_Integer, cnum, 0);
681 assert( pTab->nCol>cnum );
682 sqlite3VdbeOp3(v, OP_String8, 0, 0, pTab->aCol[cnum].zName, 0);
683 sqlite3VdbeAddOp(v, OP_Callback, 3, 0);
684 }
685 }
686 }else
687
688 if( sqlite3StrICmp(zLeft, "index_list")==0 && zRight ){
689 Index *pIdx;
690 Table *pTab;
691 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
692 pTab = sqlite3FindTable(db, zRight, zDb);
693 if( pTab ){
694 v = sqlite3GetVdbe(pParse);
695 pIdx = pTab->pIndex;
696 if( pIdx ){
697 int i = 0;
698 sqlite3VdbeSetNumCols(v, 3);
699 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", P3_STATIC);
700 sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P3_STATIC);
701 sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "unique", P3_STATIC);
702 while(pIdx){
703 sqlite3VdbeAddOp(v, OP_Integer, i, 0);
704 sqlite3VdbeOp3(v, OP_String8, 0, 0, pIdx->zName, 0);
705 sqlite3VdbeAddOp(v, OP_Integer, pIdx->onError!=OE_None, 0);
706 sqlite3VdbeAddOp(v, OP_Callback, 3, 0);
707 ++i;
708 pIdx = pIdx->pNext;
709 }
710 }
711 }
712 }else
713
714 if( sqlite3StrICmp(zLeft, "database_list")==0 ){
715 int i;
716 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
717 sqlite3VdbeSetNumCols(v, 3);
718 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", P3_STATIC);
719 sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P3_STATIC);
720 sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "file", P3_STATIC);
721 for(i=0; i<db->nDb; i++){
722 if( db->aDb[i].pBt==0 ) continue;
723 assert( db->aDb[i].zName!=0 );
724 sqlite3VdbeAddOp(v, OP_Integer, i, 0);
725 sqlite3VdbeOp3(v, OP_String8, 0, 0, db->aDb[i].zName, 0);
726 sqlite3VdbeOp3(v, OP_String8, 0, 0,
727 sqlite3BtreeGetFilename(db->aDb[i].pBt), 0);
728 sqlite3VdbeAddOp(v, OP_Callback, 3, 0);
729 }
730 }else
731
732 if( sqlite3StrICmp(zLeft, "collation_list")==0 ){
733 int i = 0;
734 HashElem *p;
735 sqlite3VdbeSetNumCols(v, 2);
736 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "seq", P3_STATIC);
737 sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P3_STATIC);
738 for(p=sqliteHashFirst(&db->aCollSeq); p; p=sqliteHashNext(p)){
739 CollSeq *pColl = (CollSeq *)sqliteHashData(p);
740 sqlite3VdbeAddOp(v, OP_Integer, i++, 0);
741 sqlite3VdbeOp3(v, OP_String8, 0, 0, pColl->zName, 0);
742 sqlite3VdbeAddOp(v, OP_Callback, 2, 0);
743 }
744 }else
745#endif /* SQLITE_OMIT_SCHEMA_PRAGMAS */
746
747#ifndef SQLITE_OMIT_FOREIGN_KEY
748 if( sqlite3StrICmp(zLeft, "foreign_key_list")==0 && zRight ){
749 FKey *pFK;
750 Table *pTab;
751 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
752 pTab = sqlite3FindTable(db, zRight, zDb);
753 if( pTab ){
754 v = sqlite3GetVdbe(pParse);
755 pFK = pTab->pFKey;
756 if( pFK ){
757 int i = 0;
758 sqlite3VdbeSetNumCols(v, 5);
759 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "id", P3_STATIC);
760 sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "seq", P3_STATIC);
761 sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "table", P3_STATIC);
762 sqlite3VdbeSetColName(v, 3, COLNAME_NAME, "from", P3_STATIC);
763 sqlite3VdbeSetColName(v, 4, COLNAME_NAME, "to", P3_STATIC);
764 while(pFK){
765 int j;
766 for(j=0; j<pFK->nCol; j++){
767 char *zCol = pFK->aCol[j].zCol;
768 sqlite3VdbeAddOp(v, OP_Integer, i, 0);
769 sqlite3VdbeAddOp(v, OP_Integer, j, 0);
770 sqlite3VdbeOp3(v, OP_String8, 0, 0, pFK->zTo, 0);
771 sqlite3VdbeOp3(v, OP_String8, 0, 0,
772 pTab->aCol[pFK->aCol[j].iFrom].zName, 0);
773 sqlite3VdbeOp3(v, zCol ? OP_String8 : OP_Null, 0, 0, zCol, 0);
774 sqlite3VdbeAddOp(v, OP_Callback, 5, 0);
775 }
776 ++i;
777 pFK = pFK->pNextFrom;
778 }
779 }
780 }
781 }else
782#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */
783
784#ifndef NDEBUG
785 if( sqlite3StrICmp(zLeft, "parser_trace")==0 ){
786 if( zRight ){
787 if( getBoolean(zRight) ){
788 sqlite3ParserTrace(stderr, "parser: ");
789 }else{
790 sqlite3ParserTrace(0, 0);
791 }
792 }
793 }else
794#endif
795
796 /* Reinstall the LIKE and GLOB functions. The variant of LIKE
797 ** used will be case sensitive or not depending on the RHS.
798 */
799 if( sqlite3StrICmp(zLeft, "case_sensitive_like")==0 ){
800 if( zRight ){
801 sqlite3RegisterLikeFunctions(db, getBoolean(zRight));
802 }
803 }else
804
805#ifndef SQLITE_INTEGRITY_CHECK_ERROR_MAX
806# define SQLITE_INTEGRITY_CHECK_ERROR_MAX 100
807#endif
808
809#ifndef SQLITE_OMIT_INTEGRITY_CHECK
810 if( sqlite3StrICmp(zLeft, "integrity_check")==0 ){
811 int i, j, addr, mxErr;
812
813 /* Code that appears at the end of the integrity check. If no error
814 ** messages have been generated, output OK. Otherwise output the
815 ** error message
816 */
817 static const VdbeOpList endCode[] = {
818 { OP_MemLoad, 0, 0, 0},
819 { OP_Integer, 0, 0, 0},
820 { OP_Ne, 0, 0, 0}, /* 2 */
821 { OP_String8, 0, 0, "ok"},
822 { OP_Callback, 1, 0, 0},
823 };
824
825 /* Initialize the VDBE program */
826 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
827 sqlite3VdbeSetNumCols(v, 1);
828 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "integrity_check", P3_STATIC);
829
830 /* Set the maximum error count */
831 mxErr = SQLITE_INTEGRITY_CHECK_ERROR_MAX;
832 if( zRight ){
833 mxErr = atoi(zRight);
834 if( mxErr<=0 ){
835 mxErr = SQLITE_INTEGRITY_CHECK_ERROR_MAX;
836 }
837 }
838 sqlite3VdbeAddOp(v, OP_MemInt, mxErr, 0);
839
840 /* Do an integrity check on each database file */
841 for(i=0; i<db->nDb; i++){
842 HashElem *x;
843 Hash *pTbls;
844 int cnt = 0;
845
846 if( OMIT_TEMPDB && i==1 ) continue;
847
848 sqlite3CodeVerifySchema(pParse, i);
849 addr = sqlite3VdbeAddOp(v, OP_IfMemPos, 0, 0);
850 sqlite3VdbeAddOp(v, OP_Halt, 0, 0);
851 sqlite3VdbeJumpHere(v, addr);
852
853 /* Do an integrity check of the B-Tree
854 */
855 pTbls = &db->aDb[i].pSchema->tblHash;
856 for(x=sqliteHashFirst(pTbls); x; x=sqliteHashNext(x)){
857 Table *pTab = sqliteHashData(x);
858 Index *pIdx;
859 sqlite3VdbeAddOp(v, OP_Integer, pTab->tnum, 0);
860 cnt++;
861 for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
862 sqlite3VdbeAddOp(v, OP_Integer, pIdx->tnum, 0);
863 cnt++;
864 }
865 }
866 if( cnt==0 ) continue;
867 sqlite3VdbeAddOp(v, OP_IntegrityCk, 0, i);
868 addr = sqlite3VdbeAddOp(v, OP_IsNull, -1, 0);
869 sqlite3VdbeOp3(v, OP_String8, 0, 0,
870 sqlite3MPrintf(db, "*** in database %s ***\n", db->aDb[i].zName),
871 P3_DYNAMIC);
872 sqlite3VdbeAddOp(v, OP_Pull, 1, 0);
873 sqlite3VdbeAddOp(v, OP_Concat, 0, 0);
874 sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
875 sqlite3VdbeJumpHere(v, addr);
876
877 /* Make sure all the indices are constructed correctly.
878 */
879 for(x=sqliteHashFirst(pTbls); x; x=sqliteHashNext(x)){
880 Table *pTab = sqliteHashData(x);
881 Index *pIdx;
882 int loopTop;
883
884 if( pTab->pIndex==0 ) continue;
885 addr = sqlite3VdbeAddOp(v, OP_IfMemPos, 0, 0);
886 sqlite3VdbeAddOp(v, OP_Halt, 0, 0);
887 sqlite3VdbeJumpHere(v, addr);
888 sqlite3OpenTableAndIndices(pParse, pTab, 1, OP_OpenRead);
889 sqlite3VdbeAddOp(v, OP_MemInt, 0, 1);
890 loopTop = sqlite3VdbeAddOp(v, OP_Rewind, 1, 0);
891 sqlite3VdbeAddOp(v, OP_MemIncr, 1, 1);
892 for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
893 int jmp2;
894 static const VdbeOpList idxErr[] = {
895 { OP_MemIncr, -1, 0, 0},
896 { OP_String8, 0, 0, "rowid "},
897 { OP_Rowid, 1, 0, 0},
898 { OP_String8, 0, 0, " missing from index "},
899 { OP_String8, 0, 0, 0}, /* 4 */
900 { OP_Concat, 2, 0, 0},
901 { OP_Callback, 1, 0, 0},
902 };
903 sqlite3GenerateIndexKey(v, pIdx, 1);
904 jmp2 = sqlite3VdbeAddOp(v, OP_Found, j+2, 0);
905 addr = sqlite3VdbeAddOpList(v, ArraySize(idxErr), idxErr);
906 sqlite3VdbeChangeP3(v, addr+4, pIdx->zName, P3_STATIC);
907 sqlite3VdbeJumpHere(v, jmp2);
908 }
909 sqlite3VdbeAddOp(v, OP_Next, 1, loopTop+1);
910 sqlite3VdbeJumpHere(v, loopTop);
911 for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){
912 static const VdbeOpList cntIdx[] = {
913 { OP_MemInt, 0, 2, 0},
914 { OP_Rewind, 0, 0, 0}, /* 1 */
915 { OP_MemIncr, 1, 2, 0},
916 { OP_Next, 0, 0, 0}, /* 3 */
917 { OP_MemLoad, 1, 0, 0},
918 { OP_MemLoad, 2, 0, 0},
919 { OP_Eq, 0, 0, 0}, /* 6 */
920 { OP_MemIncr, -1, 0, 0},
921 { OP_String8, 0, 0, "wrong # of entries in index "},
922 { OP_String8, 0, 0, 0}, /* 9 */
923 { OP_Concat, 0, 0, 0},
924 { OP_Callback, 1, 0, 0},
925 };
926 if( pIdx->tnum==0 ) continue;
927 addr = sqlite3VdbeAddOp(v, OP_IfMemPos, 0, 0);
928 sqlite3VdbeAddOp(v, OP_Halt, 0, 0);
929 sqlite3VdbeJumpHere(v, addr);
930 addr = sqlite3VdbeAddOpList(v, ArraySize(cntIdx), cntIdx);
931 sqlite3VdbeChangeP1(v, addr+1, j+2);
932 sqlite3VdbeChangeP2(v, addr+1, addr+4);
933 sqlite3VdbeChangeP1(v, addr+3, j+2);
934 sqlite3VdbeChangeP2(v, addr+3, addr+2);
935 sqlite3VdbeJumpHere(v, addr+6);
936 sqlite3VdbeChangeP3(v, addr+9, pIdx->zName, P3_STATIC);
937 }
938 }
939 }
940 addr = sqlite3VdbeAddOpList(v, ArraySize(endCode), endCode);
941 sqlite3VdbeChangeP1(v, addr+1, mxErr);
942 sqlite3VdbeJumpHere(v, addr+2);
943 }else
944#endif /* SQLITE_OMIT_INTEGRITY_CHECK */
945
946#ifndef SQLITE_OMIT_UTF16
947 /*
948 ** PRAGMA encoding
949 ** PRAGMA encoding = "utf-8"|"utf-16"|"utf-16le"|"utf-16be"
950 **
951 ** In it's first form, this pragma returns the encoding of the main
952 ** database. If the database is not initialized, it is initialized now.
953 **
954 ** The second form of this pragma is a no-op if the main database file
955 ** has not already been initialized. In this case it sets the default
956 ** encoding that will be used for the main database file if a new file
957 ** is created. If an existing main database file is opened, then the
958 ** default text encoding for the existing database is used.
959 **
960 ** In all cases new databases created using the ATTACH command are
961 ** created to use the same default text encoding as the main database. If
962 ** the main database has not been initialized and/or created when ATTACH
963 ** is executed, this is done before the ATTACH operation.
964 **
965 ** In the second form this pragma sets the text encoding to be used in
966 ** new database files created using this database handle. It is only
967 ** useful if invoked immediately after the main database i
968 */
969 if( sqlite3StrICmp(zLeft, "encoding")==0 ){
970 static const struct EncName {
971 char *zName;
972 u8 enc;
973 } encnames[] = {
974 { "UTF-8", SQLITE_UTF8 },
975 { "UTF8", SQLITE_UTF8 },
976 { "UTF-16le", SQLITE_UTF16LE },
977 { "UTF16le", SQLITE_UTF16LE },
978 { "UTF-16be", SQLITE_UTF16BE },
979 { "UTF16be", SQLITE_UTF16BE },
980 { "UTF-16", 0 }, /* SQLITE_UTF16NATIVE */
981 { "UTF16", 0 }, /* SQLITE_UTF16NATIVE */
982 { 0, 0 }
983 };
984 const struct EncName *pEnc;
985 if( !zRight ){ /* "PRAGMA encoding" */
986 if( sqlite3ReadSchema(pParse) ) goto pragma_out;
987 sqlite3VdbeSetNumCols(v, 1);
988 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "encoding", P3_STATIC);
989 sqlite3VdbeAddOp(v, OP_String8, 0, 0);
990 for(pEnc=&encnames[0]; pEnc->zName; pEnc++){
991 if( pEnc->enc==ENC(pParse->db) ){
992 sqlite3VdbeChangeP3(v, -1, pEnc->zName, P3_STATIC);
993 break;
994 }
995 }
996 sqlite3VdbeAddOp(v, OP_Callback, 1, 0);
997 }else{ /* "PRAGMA encoding = XXX" */
998 /* Only change the value of sqlite.enc if the database handle is not
999 ** initialized. If the main database exists, the new sqlite.enc value
1000 ** will be overwritten when the schema is next loaded. If it does not
1001 ** already exists, it will be created to use the new encoding value.
1002 */
1003 if(
1004 !(DbHasProperty(db, 0, DB_SchemaLoaded)) ||
1005 DbHasProperty(db, 0, DB_Empty)
1006 ){
1007 for(pEnc=&encnames[0]; pEnc->zName; pEnc++){
1008 if( 0==sqlite3StrICmp(zRight, pEnc->zName) ){
1009 ENC(pParse->db) = pEnc->enc ? pEnc->enc : SQLITE_UTF16NATIVE;
1010 break;
1011 }
1012 }
1013 if( !pEnc->zName ){
1014 sqlite3ErrorMsg(pParse, "unsupported encoding: %s", zRight);
1015 }
1016 }
1017 }
1018 }else
1019#endif /* SQLITE_OMIT_UTF16 */
1020
1021#ifndef SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS
1022 /*
1023 ** PRAGMA [database.]schema_version
1024 ** PRAGMA [database.]schema_version = <integer>
1025 **
1026 ** PRAGMA [database.]user_version
1027 ** PRAGMA [database.]user_version = <integer>
1028 **
1029 ** The pragma's schema_version and user_version are used to set or get
1030 ** the value of the schema-version and user-version, respectively. Both
1031 ** the schema-version and the user-version are 32-bit signed integers
1032 ** stored in the database header.
1033 **
1034 ** The schema-cookie is usually only manipulated internally by SQLite. It
1035 ** is incremented by SQLite whenever the database schema is modified (by
1036 ** creating or dropping a table or index). The schema version is used by
1037 ** SQLite each time a query is executed to ensure that the internal cache
1038 ** of the schema used when compiling the SQL query matches the schema of
1039 ** the database against which the compiled query is actually executed.
1040 ** Subverting this mechanism by using "PRAGMA schema_version" to modify
1041 ** the schema-version is potentially dangerous and may lead to program
1042 ** crashes or database corruption. Use with caution!
1043 **
1044 ** The user-version is not used internally by SQLite. It may be used by
1045 ** applications for any purpose.
1046 */
1047 if( sqlite3StrICmp(zLeft, "schema_version")==0
1048 || sqlite3StrICmp(zLeft, "user_version")==0
1049 || sqlite3StrICmp(zLeft, "freelist_count")==0
1050 ){
1051
1052 int iCookie; /* Cookie index. 0 for schema-cookie, 6 for user-cookie. */
1053 sqlite3VdbeUsesBtree(v, iDb);
1054 switch( zLeft[0] ){
1055 case 's': case 'S':
1056 iCookie = 0;
1057 break;
1058 case 'f': case 'F':
1059 iCookie = 1;
1060 iDb = (-1*(iDb+1));
1061 assert(iDb<=0);
1062 break;
1063 default:
1064 iCookie = 5;
1065 break;
1066 }
1067
1068 if( zRight && iDb>=0 ){
1069 /* Write the specified cookie value */
1070 static const VdbeOpList setCookie[] = {
1071 { OP_Transaction, 0, 1, 0}, /* 0 */
1072 { OP_Integer, 0, 0, 0}, /* 1 */
1073 { OP_SetCookie, 0, 0, 0}, /* 2 */
1074 };
1075 int addr = sqlite3VdbeAddOpList(v, ArraySize(setCookie), setCookie);
1076 sqlite3VdbeChangeP1(v, addr, iDb);
1077 sqlite3VdbeChangeP1(v, addr+1, atoi(zRight));
1078 sqlite3VdbeChangeP1(v, addr+2, iDb);
1079 sqlite3VdbeChangeP2(v, addr+2, iCookie);
1080 }else{
1081 /* Read the specified cookie value */
1082 static const VdbeOpList readCookie[] = {
1083 { OP_ReadCookie, 0, 0, 0}, /* 0 */
1084 { OP_Callback, 1, 0, 0}
1085 };
1086 int addr = sqlite3VdbeAddOpList(v, ArraySize(readCookie), readCookie);
1087 sqlite3VdbeChangeP1(v, addr, iDb);
1088 sqlite3VdbeChangeP2(v, addr, iCookie);
1089 sqlite3VdbeSetNumCols(v, 1);
1090 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLeft, P3_TRANSIENT);
1091 }
1092 }else
1093#endif /* SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS */
1094
1095#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
1096 /*
1097 ** Report the current state of file logs for all databases
1098 */
1099 if( sqlite3StrICmp(zLeft, "lock_status")==0 ){
1100 static const char *const azLockName[] = {
1101 "unlocked", "shared", "reserved", "pending", "exclusive"
1102 };
1103 int i;
1104 Vdbe *v = sqlite3GetVdbe(pParse);
1105 sqlite3VdbeSetNumCols(v, 2);
1106 sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "database", P3_STATIC);
1107 sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "status", P3_STATIC);
1108 for(i=0; i<db->nDb; i++){
1109 Btree *pBt;
1110 Pager *pPager;
1111 const char *zState = "unknown";
1112 int j;
1113 if( db->aDb[i].zName==0 ) continue;
1114 sqlite3VdbeOp3(v, OP_String8, 0, 0, db->aDb[i].zName, P3_STATIC);
1115 pBt = db->aDb[i].pBt;
1116 if( pBt==0 || (pPager = sqlite3BtreePager(pBt))==0 ){
1117 zState = "closed";
1118 }else if( sqlite3_file_control(db, db->aDb[i].zName,
1119 SQLITE_FCNTL_LOCKSTATE, &j)==SQLITE_OK ){
1120 zState = azLockName[j];
1121 }
1122 sqlite3VdbeOp3(v, OP_String8, 0, 0, zState, P3_STATIC);
1123 sqlite3VdbeAddOp(v, OP_Callback, 2, 0);
1124 }
1125 }else
1126#endif
1127
1128#ifdef SQLITE_SSE
1129 /*
1130 ** Check to see if the sqlite_statements table exists. Create it
1131 ** if it does not.
1132 */
1133 if( sqlite3StrICmp(zLeft, "create_sqlite_statement_table")==0 ){
1134 extern int sqlite3CreateStatementsTable(Parse*);
1135 sqlite3CreateStatementsTable(pParse);
1136 }else
1137#endif
1138
1139#if SQLITE_HAS_CODEC
1140 if( sqlite3StrICmp(zLeft, "key")==0 ){
1141 sqlite3_key(db, zRight, strlen(zRight));
1142 }else
1143#endif
1144#if SQLITE_HAS_CODEC || defined(SQLITE_ENABLE_CEROD)
1145 if( sqlite3StrICmp(zLeft, "activate_extensions")==0 ){
1146#if SQLITE_HAS_CODEC
1147 if( sqlite3StrNICmp(zRight, "see-", 4)==0 ){
1148 extern void sqlite3_activate_see(const char*);
1149 sqlite3_activate_see(&zRight[4]);
1150 }
1151#endif
1152#ifdef SQLITE_ENABLE_CEROD
1153 if( sqlite3StrNICmp(zRight, "cerod-", 6)==0 ){
1154 extern void sqlite3_activate_cerod(const char*);
1155 sqlite3_activate_cerod(&zRight[6]);
1156 }
1157#endif
1158 }
1159#endif
1160
1161 {}
1162
1163 if( v ){
1164 /* Code an OP_Expire at the end of each PRAGMA program to cause
1165 ** the VDBE implementing the pragma to expire. Most (all?) pragmas
1166 ** are only valid for a single execution.
1167 */
1168 sqlite3VdbeAddOp(v, OP_Expire, 1, 0);
1169
1170 /*
1171 ** Reset the safety level, in case the fullfsync flag or synchronous
1172 ** setting changed.
1173 */
1174#ifndef SQLITE_OMIT_PAGER_PRAGMAS
1175 if( db->autoCommit ){
1176 sqlite3BtreeSetSafetyLevel(pDb->pBt, pDb->safety_level,
1177 (db->flags&SQLITE_FullFSync)!=0);
1178 }
1179#endif
1180 }
1181pragma_out:
1182 sqlite3_free(zLeft);
1183 sqlite3_free(zRight);
1184}
1185
1186#endif /* SQLITE_OMIT_PRAGMA || SQLITE_OMIT_PARSER */
generated by cgit v1.1 at 2024-12-22 07:43:58 +0000