/ Check-in [f7213485]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Remove the NullCallback opcode. Handle the empty_result_set pragma inside the sqlite_exec() function. (CVS 1244)
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1:f72134852bf33d13fd2bc6f35251e4b33bc10fac
User & Date: drh 2004-02-16 03:44:02
Context
2004-02-17
18:26
Avoid line endings munging by Cygwin; ticket #370 (CVS 1245) check-in: 50e67948 user: dougcurrie tags: trunk
2004-02-16
03:44
Remove the NullCallback opcode. Handle the empty_result_set pragma inside the sqlite_exec() function. (CVS 1244) check-in: f7213485 user: drh tags: trunk
2004-02-14
23:59
Eliminate obsolete code associated with the older callback functionality. (CVS 1243) check-in: 2dbc4593 user: drh tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/copy.c.

7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
...
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the COPY command.
**
** $Id: copy.c,v 1.6 2003/06/02 22:50:26 drh Exp $
*/
#include "sqliteInt.h"

/*
** The COPY command is for compatibility with PostgreSQL and specificially
** for the ability to read the output of pg_dump.  The format is as
** follows:
................................................................................
      sqliteVdbeAddOp(v, OP_AddImm, 1, 0);  /* Increment row count */
    }
    sqliteVdbeAddOp(v, OP_Goto, 0, addr);
    sqliteVdbeResolveLabel(v, end);
    sqliteVdbeAddOp(v, OP_Noop, 0, 0);
    sqliteEndWriteOperation(pParse);
    if( db->flags & SQLITE_CountRows ){
      sqliteVdbeAddOp(v, OP_ColumnName, 0, 0);
      sqliteVdbeChangeP3(v, -1, "rows inserted", P3_STATIC);
      sqliteVdbeAddOp(v, OP_Callback, 1, 0);
    }
  }
  
copy_cleanup:
  sqliteSrcListDelete(pTableName);
  sqliteFree(zFile);
  return;
}







|







 







|










7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
...
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the COPY command.
**
** $Id: copy.c,v 1.7 2004/02/16 03:44:02 drh Exp $
*/
#include "sqliteInt.h"

/*
** The COPY command is for compatibility with PostgreSQL and specificially
** for the ability to read the output of pg_dump.  The format is as
** follows:
................................................................................
      sqliteVdbeAddOp(v, OP_AddImm, 1, 0);  /* Increment row count */
    }
    sqliteVdbeAddOp(v, OP_Goto, 0, addr);
    sqliteVdbeResolveLabel(v, end);
    sqliteVdbeAddOp(v, OP_Noop, 0, 0);
    sqliteEndWriteOperation(pParse);
    if( db->flags & SQLITE_CountRows ){
      sqliteVdbeAddOp(v, OP_ColumnName, 0, 1);
      sqliteVdbeChangeP3(v, -1, "rows inserted", P3_STATIC);
      sqliteVdbeAddOp(v, OP_Callback, 1, 0);
    }
  }
  
copy_cleanup:
  sqliteSrcListDelete(pTableName);
  sqliteFree(zFile);
  return;
}

Changes to src/delete.c.

8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle DELETE FROM statements.
**
** $Id: delete.c,v 1.58 2004/01/19 04:54:29 jplyon Exp $
*/
#include "sqliteInt.h"

/*
** Look up every table that is named in pSrc.  If any table is not found,
** add an error message to pParse->zErrMsg and return NULL.  If all tables
** are found, return a pointer to the last table.
................................................................................
  }
  sqliteEndWriteOperation(pParse);

  /*
  ** Return the number of rows that were deleted.
  */
  if( db->flags & SQLITE_CountRows ){
    sqliteVdbeAddOp(v, OP_ColumnName, 0, 0);
    sqliteVdbeChangeP3(v, -1, "rows deleted", P3_STATIC);
    sqliteVdbeAddOp(v, OP_Callback, 1, 0);
  }

delete_from_cleanup:
  sqliteAuthContextPop(&sContext);
  sqliteSrcListDelete(pTabList);







|







 







|







8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle DELETE FROM statements.
**
** $Id: delete.c,v 1.59 2004/02/16 03:44:02 drh Exp $
*/
#include "sqliteInt.h"

/*
** Look up every table that is named in pSrc.  If any table is not found,
** add an error message to pParse->zErrMsg and return NULL.  If all tables
** are found, return a pointer to the last table.
................................................................................
  }
  sqliteEndWriteOperation(pParse);

  /*
  ** Return the number of rows that were deleted.
  */
  if( db->flags & SQLITE_CountRows ){
    sqliteVdbeAddOp(v, OP_ColumnName, 0, 1);
    sqliteVdbeChangeP3(v, -1, "rows deleted", P3_STATIC);
    sqliteVdbeAddOp(v, OP_Callback, 1, 0);
  }

delete_from_cleanup:
  sqliteAuthContextPop(&sContext);
  sqliteSrcListDelete(pTabList);

Changes to src/insert.c.

8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: insert.c,v 1.90 2003/12/06 21:43:56 drh Exp $
*/
#include "sqliteInt.h"

/*
** This routine is call to handle SQL of the following forms:
**
**    insert into TABLE (IDLIST) values(EXPRLIST)
................................................................................

  sqliteEndWriteOperation(pParse);

  /*
  ** Return the number of rows inserted.
  */
  if( db->flags & SQLITE_CountRows ){
    sqliteVdbeAddOp(v, OP_ColumnName, 0, 0);
    sqliteVdbeChangeP3(v, -1, "rows inserted", P3_STATIC);
    sqliteVdbeAddOp(v, OP_MemLoad, iCntMem, 0);
    sqliteVdbeAddOp(v, OP_Callback, 1, 0);
  }

insert_cleanup:
  sqliteSrcListDelete(pTabList);







|







 







|







8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: insert.c,v 1.91 2004/02/16 03:44:02 drh Exp $
*/
#include "sqliteInt.h"

/*
** This routine is call to handle SQL of the following forms:
**
**    insert into TABLE (IDLIST) values(EXPRLIST)
................................................................................

  sqliteEndWriteOperation(pParse);

  /*
  ** Return the number of rows inserted.
  */
  if( db->flags & SQLITE_CountRows ){
    sqliteVdbeAddOp(v, OP_ColumnName, 0, 1);
    sqliteVdbeChangeP3(v, -1, "rows inserted", P3_STATIC);
    sqliteVdbeAddOp(v, OP_MemLoad, iCntMem, 0);
    sqliteVdbeAddOp(v, OP_Callback, 1, 0);
  }

insert_cleanup:
  sqliteSrcListDelete(pTabList);

Changes to src/main.c.

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
...
610
611
612
613
614
615
616

617
618
619
620
621
622
623
...
624
625
626
627
628
629
630

631
632
633
634
635
636
637
638
639

640




641
642
643
644
645
646
647
**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.155 2004/02/14 23:59:57 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** A pointer to this structure is used to communicate information
................................................................................
  char **pzErrMsg             /* Write error messages here */
){
  int rc = SQLITE_OK;
  const char *zLeftover;
  sqlite_vm *pVm;
  int nRetry = 0;
  int nChange = 0;


  if( zSql==0 ) return SQLITE_OK;
  while( rc==SQLITE_OK && zSql[0] ){
    pVm = 0;
    rc = sqlite_compile(db, zSql, &zLeftover, &pVm, pzErrMsg);
    if( rc!=SQLITE_OK ){
      assert( pVm==0 || sqlite_malloc_failed );
................................................................................
      return rc;
    }
    if( pVm==0 ){
      /* This happens if the zSql input contained only whitespace */
      break;
    }
    db->nChange += nChange;

    while(1){
      int nArg;
      char **azArg, **azCol;
      rc = sqlite_step(pVm, &nArg, (const char***)&azArg,(const char***)&azCol);
      if( rc==SQLITE_ROW ){
        if( xCallback(pArg, nArg, azArg, azCol) ){
          sqlite_finalize(pVm, 0);
          return SQLITE_ABORT;
        }

      }else{




        rc = sqlite_finalize(pVm, pzErrMsg);
        if( rc==SQLITE_SCHEMA && nRetry<2 ){
          nRetry++;
          rc = SQLITE_OK;
          break;
        }
        if( db->pVdbe==0 ){







|







 







>







 







>





|



>

>
>
>
>







10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
...
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
...
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.156 2004/02/16 03:44:02 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** A pointer to this structure is used to communicate information
................................................................................
  char **pzErrMsg             /* Write error messages here */
){
  int rc = SQLITE_OK;
  const char *zLeftover;
  sqlite_vm *pVm;
  int nRetry = 0;
  int nChange = 0;
  int nCallback;

  if( zSql==0 ) return SQLITE_OK;
  while( rc==SQLITE_OK && zSql[0] ){
    pVm = 0;
    rc = sqlite_compile(db, zSql, &zLeftover, &pVm, pzErrMsg);
    if( rc!=SQLITE_OK ){
      assert( pVm==0 || sqlite_malloc_failed );
................................................................................
      return rc;
    }
    if( pVm==0 ){
      /* This happens if the zSql input contained only whitespace */
      break;
    }
    db->nChange += nChange;
    nCallback = 0;
    while(1){
      int nArg;
      char **azArg, **azCol;
      rc = sqlite_step(pVm, &nArg, (const char***)&azArg,(const char***)&azCol);
      if( rc==SQLITE_ROW ){
        if( xCallback!=0 && xCallback(pArg, nArg, azArg, azCol) ){
          sqlite_finalize(pVm, 0);
          return SQLITE_ABORT;
        }
        nCallback++;
      }else{
        if( rc==SQLITE_DONE && nCallback==0
          && (db->flags & SQLITE_NullCallback)!=0 && xCallback!=0 ){
          xCallback(pArg, nArg, azArg, azCol);
        }
        rc = sqlite_finalize(pVm, pzErrMsg);
        if( rc==SQLITE_SCHEMA && nRetry<2 ){
          nRetry++;
          rc = SQLITE_OK;
          break;
        }
        if( db->pVdbe==0 ){

Changes to src/pragma.c.

7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
...
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
...
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
...
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
...
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
...
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
...
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
...
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
...
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
...
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
...
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
...
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
...
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the PRAGMA command.
**
** $Id: pragma.c,v 1.13 2004/01/19 04:52:29 jplyon Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** Interpret the given string as a boolean value.
*/
................................................................................
    static VdbeOp getCacheSize[] = {
      { OP_ReadCookie,  0, 2,        0},
      { OP_AbsValue,    0, 0,        0},
      { OP_Dup,         0, 0,        0},
      { OP_Integer,     0, 0,        0},
      { OP_Ne,          0, 6,        0},
      { OP_Integer,     MAX_PAGES,0, 0},
      { OP_ColumnName,  0, 0,        "cache_size"},
      { OP_Callback,    1, 0,        0},
    };
    if( pRight->z==pLeft->z ){
      sqliteVdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
    }else{
      int addr;
      int size = atoi(zRight);
................................................................................
  ** page cache size value.  It does not change the persistent
  ** cache size stored on the disk so the cache size will revert
  ** to its default value when the database is closed and reopened.
  ** N should be a positive integer.
  */
  if( sqliteStrICmp(zLeft,"cache_size")==0 ){
    static VdbeOp getCacheSize[] = {
      { OP_ColumnName,  0, 0,        "cache_size"},
      { OP_Callback,    1, 0,        0},
    };
    if( pRight->z==pLeft->z ){
      int size = db->cache_size;;
      if( size<0 ) size = -size;
      sqliteVdbeAddOp(v, OP_Integer, size, 0);
      sqliteVdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
................................................................................
  ** make sure data is being written to disk.  The risk of corruption due to
  ** a power loss in this mode is negligible but non-zero.  If synchronous
  ** is FULL, extra fsync()s occur to reduce the risk of corruption to near
  ** zero, but with a write performance penalty.  The default mode is NORMAL.
  */
  if( sqliteStrICmp(zLeft,"default_synchronous")==0 ){
    static VdbeOp getSync[] = {
      { OP_ColumnName,  0, 0,        "synchronous"},
      { OP_ReadCookie,  0, 3,        0},
      { OP_Dup,         0, 0,        0},
      { OP_If,          0, 0,        0},  /* 3 */
      { OP_ReadCookie,  0, 2,        0},
      { OP_Integer,     0, 0,        0},
      { OP_Lt,          0, 5,        0},
      { OP_AddImm,      1, 0,        0},
................................................................................
  ** Return or set the local value of the synchronous flag.  Changing
  ** the local value does not make changes to the disk file and the
  ** default value will be restored the next time the database is
  ** opened.
  */
  if( sqliteStrICmp(zLeft,"synchronous")==0 ){
    static VdbeOp getSync[] = {
      { OP_ColumnName,  0, 0,        "synchronous"},
      { OP_Callback,    1, 0,        0},
    };
    if( pRight->z==pLeft->z ){
      sqliteVdbeAddOp(v, OP_Integer, db->safety_level-1, 0);
      sqliteVdbeAddOpList(v, ArraySize(getSync), getSync);
    }else{
      int size = db->cache_size;
................................................................................
    if( pTab ){
      static VdbeOp tableInfoPreface[] = {
        { OP_ColumnName,  0, 0,       "cid"},
        { OP_ColumnName,  1, 0,       "name"},
        { OP_ColumnName,  2, 0,       "type"},
        { OP_ColumnName,  3, 0,       "notnull"},
        { OP_ColumnName,  4, 0,       "dflt_value"},
        { OP_ColumnName,  5, 0,       "pk"},
      };
      int i;
      sqliteVdbeAddOpList(v, ArraySize(tableInfoPreface), tableInfoPreface);
      sqliteViewGetColumnNames(pParse, pTab);
      for(i=0; i<pTab->nCol; i++){
        sqliteVdbeAddOp(v, OP_Integer, i, 0);
        sqliteVdbeAddOp(v, OP_String, 0, 0);
................................................................................
    Index *pIdx;
    Table *pTab;
    pIdx = sqliteFindIndex(db, zRight, 0);
    if( pIdx ){
      static VdbeOp tableInfoPreface[] = {
        { OP_ColumnName,  0, 0,       "seqno"},
        { OP_ColumnName,  1, 0,       "cid"},
        { OP_ColumnName,  2, 0,       "name"},
      };
      int i;
      pTab = pIdx->pTable;
      sqliteVdbeAddOpList(v, ArraySize(tableInfoPreface), tableInfoPreface);
      for(i=0; i<pIdx->nColumn; i++){
        int cnum = pIdx->aiColumn[i];
        sqliteVdbeAddOp(v, OP_Integer, i, 0);
................................................................................
      pIdx = pTab->pIndex;
    }
    if( pTab && pIdx ){
      int i = 0; 
      static VdbeOp indexListPreface[] = {
        { OP_ColumnName,  0, 0,       "seq"},
        { OP_ColumnName,  1, 0,       "name"},
        { OP_ColumnName,  2, 0,       "unique"},
      };

      sqliteVdbeAddOpList(v, ArraySize(indexListPreface), indexListPreface);
      while(pIdx){
        sqliteVdbeAddOp(v, OP_Integer, i, 0);
        sqliteVdbeAddOp(v, OP_String, 0, 0);
        sqliteVdbeChangeP3(v, -1, pIdx->zName, P3_STATIC);
................................................................................
    if( pTab && pFK ){
      int i = 0; 
      static VdbeOp indexListPreface[] = {
        { OP_ColumnName,  0, 0,       "id"},
        { OP_ColumnName,  1, 0,       "seq"},
        { OP_ColumnName,  2, 0,       "table"},
        { OP_ColumnName,  3, 0,       "from"},
        { OP_ColumnName,  4, 0,       "to"},
      };

      sqliteVdbeAddOpList(v, ArraySize(indexListPreface), indexListPreface);
      while(pFK){
        int j;
        for(j=0; j<pFK->nCol; j++){
          sqliteVdbeAddOp(v, OP_Integer, i, 0);
................................................................................
  }else

  if( sqliteStrICmp(zLeft, "database_list")==0 ){
    int i;
    static VdbeOp indexListPreface[] = {
      { OP_ColumnName,  0, 0,       "seq"},
      { OP_ColumnName,  1, 0,       "name"},
      { OP_ColumnName,  2, 0,       "file"},
    };

    sqliteVdbeAddOpList(v, ArraySize(indexListPreface), indexListPreface);
    for(i=0; i<db->nDb; i++){
      if( db->aDb[i].pBt==0 ) continue;
      assert( db->aDb[i].zName!=0 );
      sqliteVdbeAddOp(v, OP_Integer, i, 0);
................................................................................
  ** value will be restored the next time the database is opened.
  **
  ** Note that it is possible for the library compile-time options to
  ** override this setting
  */
  if( sqliteStrICmp(zLeft, "temp_store")==0 ){
    static VdbeOp getTmpDbLoc[] = {
      { OP_ColumnName,  0, 0,        "temp_store"},
      { OP_Callback,    1, 0,        0},
    };
    if( pRight->z==pLeft->z ){
      sqliteVdbeAddOp(v, OP_Integer, db->temp_store, 0);
      sqliteVdbeAddOpList(v, ArraySize(getTmpDbLoc), getTmpDbLoc);
    }else{
      if (&db->aDb[1].pBt != 0) {
................................................................................
  ** well as the value currently in force).
  **
  ** Note that it is possible for the library compile-time options to
  ** override this setting
  */
  if( sqliteStrICmp(zLeft, "default_temp_store")==0 ){
    static VdbeOp getTmpDbLoc[] = {
      { OP_ColumnName,  0, 0,        "temp_store"},
      { OP_ReadCookie,  0, 5,        0},
      { OP_Callback,    1, 0,        0}};
    if( pRight->z==pLeft->z ){
      sqliteVdbeAddOpList(v, ArraySize(getTmpDbLoc), getTmpDbLoc);
    }else{
      if (&db->aDb[1].pBt != 0) {
	sqliteErrorMsg(pParse, "The temporary database already exists - "
................................................................................

    /* Code that initializes the integrity check program.  Set the
    ** error count 0
    */
    static VdbeOp initCode[] = {
      { OP_Integer,     0, 0,        0},
      { OP_MemStore,    0, 1,        0},
      { OP_ColumnName,  0, 0,        "integrity_check"},
    };

    /* Code to do an BTree integrity check on a single database file.
    */
    static VdbeOp checkDb[] = {
      { OP_SetInsert,   0, 0,        "2"},
      { OP_Integer,     0, 0,        0},    /* 1 */







|







 







|







 







|







 







|







 







|







 







|







 







|







 







|







 







|







 







|







 







|







 







|







 







|







7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
...
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
...
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
...
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
...
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
...
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
...
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
...
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
...
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
...
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
...
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
...
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
...
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the PRAGMA command.
**
** $Id: pragma.c,v 1.14 2004/02/16 03:44:02 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** Interpret the given string as a boolean value.
*/
................................................................................
    static VdbeOp getCacheSize[] = {
      { OP_ReadCookie,  0, 2,        0},
      { OP_AbsValue,    0, 0,        0},
      { OP_Dup,         0, 0,        0},
      { OP_Integer,     0, 0,        0},
      { OP_Ne,          0, 6,        0},
      { OP_Integer,     MAX_PAGES,0, 0},
      { OP_ColumnName,  0, 1,        "cache_size"},
      { OP_Callback,    1, 0,        0},
    };
    if( pRight->z==pLeft->z ){
      sqliteVdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
    }else{
      int addr;
      int size = atoi(zRight);
................................................................................
  ** page cache size value.  It does not change the persistent
  ** cache size stored on the disk so the cache size will revert
  ** to its default value when the database is closed and reopened.
  ** N should be a positive integer.
  */
  if( sqliteStrICmp(zLeft,"cache_size")==0 ){
    static VdbeOp getCacheSize[] = {
      { OP_ColumnName,  0, 1,        "cache_size"},
      { OP_Callback,    1, 0,        0},
    };
    if( pRight->z==pLeft->z ){
      int size = db->cache_size;;
      if( size<0 ) size = -size;
      sqliteVdbeAddOp(v, OP_Integer, size, 0);
      sqliteVdbeAddOpList(v, ArraySize(getCacheSize), getCacheSize);
................................................................................
  ** make sure data is being written to disk.  The risk of corruption due to
  ** a power loss in this mode is negligible but non-zero.  If synchronous
  ** is FULL, extra fsync()s occur to reduce the risk of corruption to near
  ** zero, but with a write performance penalty.  The default mode is NORMAL.
  */
  if( sqliteStrICmp(zLeft,"default_synchronous")==0 ){
    static VdbeOp getSync[] = {
      { OP_ColumnName,  0, 1,        "synchronous"},
      { OP_ReadCookie,  0, 3,        0},
      { OP_Dup,         0, 0,        0},
      { OP_If,          0, 0,        0},  /* 3 */
      { OP_ReadCookie,  0, 2,        0},
      { OP_Integer,     0, 0,        0},
      { OP_Lt,          0, 5,        0},
      { OP_AddImm,      1, 0,        0},
................................................................................
  ** Return or set the local value of the synchronous flag.  Changing
  ** the local value does not make changes to the disk file and the
  ** default value will be restored the next time the database is
  ** opened.
  */
  if( sqliteStrICmp(zLeft,"synchronous")==0 ){
    static VdbeOp getSync[] = {
      { OP_ColumnName,  0, 1,        "synchronous"},
      { OP_Callback,    1, 0,        0},
    };
    if( pRight->z==pLeft->z ){
      sqliteVdbeAddOp(v, OP_Integer, db->safety_level-1, 0);
      sqliteVdbeAddOpList(v, ArraySize(getSync), getSync);
    }else{
      int size = db->cache_size;
................................................................................
    if( pTab ){
      static VdbeOp tableInfoPreface[] = {
        { OP_ColumnName,  0, 0,       "cid"},
        { OP_ColumnName,  1, 0,       "name"},
        { OP_ColumnName,  2, 0,       "type"},
        { OP_ColumnName,  3, 0,       "notnull"},
        { OP_ColumnName,  4, 0,       "dflt_value"},
        { OP_ColumnName,  5, 1,       "pk"},
      };
      int i;
      sqliteVdbeAddOpList(v, ArraySize(tableInfoPreface), tableInfoPreface);
      sqliteViewGetColumnNames(pParse, pTab);
      for(i=0; i<pTab->nCol; i++){
        sqliteVdbeAddOp(v, OP_Integer, i, 0);
        sqliteVdbeAddOp(v, OP_String, 0, 0);
................................................................................
    Index *pIdx;
    Table *pTab;
    pIdx = sqliteFindIndex(db, zRight, 0);
    if( pIdx ){
      static VdbeOp tableInfoPreface[] = {
        { OP_ColumnName,  0, 0,       "seqno"},
        { OP_ColumnName,  1, 0,       "cid"},
        { OP_ColumnName,  2, 1,       "name"},
      };
      int i;
      pTab = pIdx->pTable;
      sqliteVdbeAddOpList(v, ArraySize(tableInfoPreface), tableInfoPreface);
      for(i=0; i<pIdx->nColumn; i++){
        int cnum = pIdx->aiColumn[i];
        sqliteVdbeAddOp(v, OP_Integer, i, 0);
................................................................................
      pIdx = pTab->pIndex;
    }
    if( pTab && pIdx ){
      int i = 0; 
      static VdbeOp indexListPreface[] = {
        { OP_ColumnName,  0, 0,       "seq"},
        { OP_ColumnName,  1, 0,       "name"},
        { OP_ColumnName,  2, 1,       "unique"},
      };

      sqliteVdbeAddOpList(v, ArraySize(indexListPreface), indexListPreface);
      while(pIdx){
        sqliteVdbeAddOp(v, OP_Integer, i, 0);
        sqliteVdbeAddOp(v, OP_String, 0, 0);
        sqliteVdbeChangeP3(v, -1, pIdx->zName, P3_STATIC);
................................................................................
    if( pTab && pFK ){
      int i = 0; 
      static VdbeOp indexListPreface[] = {
        { OP_ColumnName,  0, 0,       "id"},
        { OP_ColumnName,  1, 0,       "seq"},
        { OP_ColumnName,  2, 0,       "table"},
        { OP_ColumnName,  3, 0,       "from"},
        { OP_ColumnName,  4, 1,       "to"},
      };

      sqliteVdbeAddOpList(v, ArraySize(indexListPreface), indexListPreface);
      while(pFK){
        int j;
        for(j=0; j<pFK->nCol; j++){
          sqliteVdbeAddOp(v, OP_Integer, i, 0);
................................................................................
  }else

  if( sqliteStrICmp(zLeft, "database_list")==0 ){
    int i;
    static VdbeOp indexListPreface[] = {
      { OP_ColumnName,  0, 0,       "seq"},
      { OP_ColumnName,  1, 0,       "name"},
      { OP_ColumnName,  2, 1,       "file"},
    };

    sqliteVdbeAddOpList(v, ArraySize(indexListPreface), indexListPreface);
    for(i=0; i<db->nDb; i++){
      if( db->aDb[i].pBt==0 ) continue;
      assert( db->aDb[i].zName!=0 );
      sqliteVdbeAddOp(v, OP_Integer, i, 0);
................................................................................
  ** value will be restored the next time the database is opened.
  **
  ** Note that it is possible for the library compile-time options to
  ** override this setting
  */
  if( sqliteStrICmp(zLeft, "temp_store")==0 ){
    static VdbeOp getTmpDbLoc[] = {
      { OP_ColumnName,  0, 1,        "temp_store"},
      { OP_Callback,    1, 0,        0},
    };
    if( pRight->z==pLeft->z ){
      sqliteVdbeAddOp(v, OP_Integer, db->temp_store, 0);
      sqliteVdbeAddOpList(v, ArraySize(getTmpDbLoc), getTmpDbLoc);
    }else{
      if (&db->aDb[1].pBt != 0) {
................................................................................
  ** well as the value currently in force).
  **
  ** Note that it is possible for the library compile-time options to
  ** override this setting
  */
  if( sqliteStrICmp(zLeft, "default_temp_store")==0 ){
    static VdbeOp getTmpDbLoc[] = {
      { OP_ColumnName,  0, 1,        "temp_store"},
      { OP_ReadCookie,  0, 5,        0},
      { OP_Callback,    1, 0,        0}};
    if( pRight->z==pLeft->z ){
      sqliteVdbeAddOpList(v, ArraySize(getTmpDbLoc), getTmpDbLoc);
    }else{
      if (&db->aDb[1].pBt != 0) {
	sqliteErrorMsg(pParse, "The temporary database already exists - "
................................................................................

    /* Code that initializes the integrity check program.  Set the
    ** error count 0
    */
    static VdbeOp initCode[] = {
      { OP_Integer,     0, 0,        0},
      { OP_MemStore,    0, 1,        0},
      { OP_ColumnName,  0, 1,        "integrity_check"},
    };

    /* Code to do an BTree integrity check on a single database file.
    */
    static VdbeOp checkDb[] = {
      { OP_SetInsert,   0, 0,        "2"},
      { OP_Integer,     0, 0,        0},    /* 1 */

Changes to src/select.c.

8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
685
686
687
688
689
690
691

692
693
694
695
696
697

698
699
700
701
702
703
704
705
706
707
708
709
...
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
....
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
....
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.155 2004/02/14 23:59:58 drh Exp $
*/
#include "sqliteInt.h"


/*
** Allocate a new Select structure and return a pointer to that
** structure.
................................................................................
static void generateColumnNames(
  Parse *pParse,      /* Parser context */
  SrcList *pTabList,  /* List of tables */
  ExprList *pEList    /* Expressions defining the result set */
){
  Vdbe *v = pParse->pVdbe;
  int i, j;

  if( pParse->colNamesSet || v==0 || sqlite_malloc_failed ) return;
  pParse->colNamesSet = 1;
  for(i=0; i<pEList->nExpr; i++){
    Expr *p;
    char *zType = 0;
    int showFullNames;

    p = pEList->a[i].pExpr;
    if( p==0 ) continue;
    if( pEList->a[i].zName ){
      char *zName = pEList->a[i].zName;
      sqliteVdbeAddOp(v, OP_ColumnName, i, 0);
      sqliteVdbeChangeP3(v, -1, zName, strlen(zName));
      continue;
    }
    showFullNames = (pParse->db->flags & SQLITE_FullColNames)!=0;
    if( p->op==TK_COLUMN && pTabList ){
      Table *pTab;
      char *zCol;
................................................................................
        zCol = "_ROWID_";
        zType = "INTEGER";
      }else{
        zCol = pTab->aCol[iCol].zName;
        zType = pTab->aCol[iCol].zType;
      }
      if( p->span.z && p->span.z[0] && !showFullNames ){
        int addr = sqliteVdbeAddOp(v,OP_ColumnName, i, 0);
        sqliteVdbeChangeP3(v, -1, p->span.z, p->span.n);
        sqliteVdbeCompressSpace(v, addr);
      }else if( pTabList->nSrc>1 || showFullNames ){
        char *zName = 0;
        char *zTab;
 
        zTab = pTabList->a[j].zAlias;
        if( showFullNames || zTab==0 ) zTab = pTab->zName;
        sqliteSetString(&zName, zTab, ".", zCol, 0);
        sqliteVdbeAddOp(v, OP_ColumnName, i, 0);
        sqliteVdbeChangeP3(v, -1, zName, strlen(zName));
        sqliteFree(zName);
      }else{
        sqliteVdbeAddOp(v, OP_ColumnName, i, 0);
        sqliteVdbeChangeP3(v, -1, zCol, 0);
      }
    }else if( p->span.z && p->span.z[0] ){
      int addr = sqliteVdbeAddOp(v,OP_ColumnName, i, 0);
      sqliteVdbeChangeP3(v, -1, p->span.z, p->span.n);
      sqliteVdbeCompressSpace(v, addr);
    }else{
      char zName[30];
      assert( p->op!=TK_COLUMN || pTabList==0 );
      sprintf(zName, "column%d", i+1);
      sqliteVdbeAddOp(v, OP_ColumnName, i, 0);
      sqliteVdbeChangeP3(v, -1, zName, strlen(zName));
    }
  }
}

/*
** Name of the connection operator, used for error messages.
................................................................................
  }
  assert( p->pEList && pPrior->pEList );
  if( p->pEList->nExpr!=pPrior->pEList->nExpr ){
    sqliteErrorMsg(pParse, "SELECTs to the left and right of %s"
      " do not have the same number of result columns", selectOpName(p->op));
    return 1;
  }

  /* Issue a null callback if that is what the user wants.
  */
  if( eDest==SRT_Callback ){
    sqliteVdbeAddOp(v, OP_NullCallback, p->pEList->nExpr, 0);
  }
  return 0;
}

/*
** Scan through the expression pExpr.  Replace every reference to
** a column in table number iTable with a copy of the iColumn-th
** entry in pEList.  (But leave references to the ROWID column 
................................................................................
  /* If there is an ORDER BY clause, then we need to sort the results
  ** and send them to the callback one by one.
  */
  if( pOrderBy ){
    generateSortTail(p, v, pEList->nExpr, eDest, iParm);
  }


  /* Issue a null callback if that is what the user wants.
  */
  if( eDest==SRT_Callback ){
    sqliteVdbeAddOp(v, OP_NullCallback, pEList->nExpr, 0);
  }

  /* If this was a subquery, we have now converted the subquery into a
  ** temporary table.  So delete the subquery structure from the parent
  ** to prevent this subquery from being evaluated again and to force the
  ** the use of the temporary table.
  */
  if( pParent ){
    assert( pParent->pSrc->nSrc>parentTab );







|







 







>






>




|







 







|









|



|



|






|







 







<
<
<
<
<
<







 







<
<
<
<
<
<
<







8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
...
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
....
1494
1495
1496
1497
1498
1499
1500






1501
1502
1503
1504
1505
1506
1507
....
2386
2387
2388
2389
2390
2391
2392







2393
2394
2395
2396
2397
2398
2399
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.156 2004/02/16 03:44:02 drh Exp $
*/
#include "sqliteInt.h"


/*
** Allocate a new Select structure and return a pointer to that
** structure.
................................................................................
static void generateColumnNames(
  Parse *pParse,      /* Parser context */
  SrcList *pTabList,  /* List of tables */
  ExprList *pEList    /* Expressions defining the result set */
){
  Vdbe *v = pParse->pVdbe;
  int i, j;
  assert( v!=0 );
  if( pParse->colNamesSet || v==0 || sqlite_malloc_failed ) return;
  pParse->colNamesSet = 1;
  for(i=0; i<pEList->nExpr; i++){
    Expr *p;
    char *zType = 0;
    int showFullNames;
    int p2 = i==pEList->nExpr-1;
    p = pEList->a[i].pExpr;
    if( p==0 ) continue;
    if( pEList->a[i].zName ){
      char *zName = pEList->a[i].zName;
      sqliteVdbeAddOp(v, OP_ColumnName, i, p2);
      sqliteVdbeChangeP3(v, -1, zName, strlen(zName));
      continue;
    }
    showFullNames = (pParse->db->flags & SQLITE_FullColNames)!=0;
    if( p->op==TK_COLUMN && pTabList ){
      Table *pTab;
      char *zCol;
................................................................................
        zCol = "_ROWID_";
        zType = "INTEGER";
      }else{
        zCol = pTab->aCol[iCol].zName;
        zType = pTab->aCol[iCol].zType;
      }
      if( p->span.z && p->span.z[0] && !showFullNames ){
        int addr = sqliteVdbeAddOp(v,OP_ColumnName, i, p2);
        sqliteVdbeChangeP3(v, -1, p->span.z, p->span.n);
        sqliteVdbeCompressSpace(v, addr);
      }else if( pTabList->nSrc>1 || showFullNames ){
        char *zName = 0;
        char *zTab;
 
        zTab = pTabList->a[j].zAlias;
        if( showFullNames || zTab==0 ) zTab = pTab->zName;
        sqliteSetString(&zName, zTab, ".", zCol, 0);
        sqliteVdbeAddOp(v, OP_ColumnName, i, p2);
        sqliteVdbeChangeP3(v, -1, zName, strlen(zName));
        sqliteFree(zName);
      }else{
        sqliteVdbeAddOp(v, OP_ColumnName, i, p2);
        sqliteVdbeChangeP3(v, -1, zCol, 0);
      }
    }else if( p->span.z && p->span.z[0] ){
      int addr = sqliteVdbeAddOp(v,OP_ColumnName, i, p2);
      sqliteVdbeChangeP3(v, -1, p->span.z, p->span.n);
      sqliteVdbeCompressSpace(v, addr);
    }else{
      char zName[30];
      assert( p->op!=TK_COLUMN || pTabList==0 );
      sprintf(zName, "column%d", i+1);
      sqliteVdbeAddOp(v, OP_ColumnName, i, p2);
      sqliteVdbeChangeP3(v, -1, zName, strlen(zName));
    }
  }
}

/*
** Name of the connection operator, used for error messages.
................................................................................
  }
  assert( p->pEList && pPrior->pEList );
  if( p->pEList->nExpr!=pPrior->pEList->nExpr ){
    sqliteErrorMsg(pParse, "SELECTs to the left and right of %s"
      " do not have the same number of result columns", selectOpName(p->op));
    return 1;
  }






  return 0;
}

/*
** Scan through the expression pExpr.  Replace every reference to
** a column in table number iTable with a copy of the iColumn-th
** entry in pEList.  (But leave references to the ROWID column 
................................................................................
  /* If there is an ORDER BY clause, then we need to sort the results
  ** and send them to the callback one by one.
  */
  if( pOrderBy ){
    generateSortTail(p, v, pEList->nExpr, eDest, iParm);
  }








  /* If this was a subquery, we have now converted the subquery into a
  ** temporary table.  So delete the subquery structure from the parent
  ** to prevent this subquery from being evaluated again and to force the
  ** the use of the temporary table.
  */
  if( pParent ){
    assert( pParent->pSrc->nSrc>parentTab );

Changes to src/update.c.

8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: update.c,v 1.67 2003/06/01 01:10:33 drh Exp $
*/
#include "sqliteInt.h"

/*
** Process an UPDATE statement.
**
**   UPDATE OR IGNORE table_wxyz SET a=b, c=d WHERE e<5 AND f NOT NULL;
................................................................................

  sqliteEndWriteOperation(pParse);

  /*
  ** Return the number of rows that were changed.
  */
  if( db->flags & SQLITE_CountRows && !pParse->trigStack ){
    sqliteVdbeAddOp(v, OP_ColumnName, 0, 0);
    sqliteVdbeChangeP3(v, -1, "rows updated", P3_STATIC);
    sqliteVdbeAddOp(v, OP_Callback, 1, 0);
  }

update_cleanup:
  sqliteAuthContextPop(&sContext);
  sqliteFree(apIdx);
  sqliteFree(aXRef);
  sqliteSrcListDelete(pTabList);
  sqliteExprListDelete(pChanges);
  sqliteExprDelete(pWhere);
  return;
}







|







 







|













8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: update.c,v 1.68 2004/02/16 03:44:02 drh Exp $
*/
#include "sqliteInt.h"

/*
** Process an UPDATE statement.
**
**   UPDATE OR IGNORE table_wxyz SET a=b, c=d WHERE e<5 AND f NOT NULL;
................................................................................

  sqliteEndWriteOperation(pParse);

  /*
  ** Return the number of rows that were changed.
  */
  if( db->flags & SQLITE_CountRows && !pParse->trigStack ){
    sqliteVdbeAddOp(v, OP_ColumnName, 0, 1);
    sqliteVdbeChangeP3(v, -1, "rows updated", P3_STATIC);
    sqliteVdbeAddOp(v, OP_Callback, 1, 0);
  }

update_cleanup:
  sqliteAuthContextPop(&sContext);
  sqliteFree(apIdx);
  sqliteFree(aXRef);
  sqliteSrcListDelete(pTabList);
  sqliteExprListDelete(pChanges);
  sqliteExprDelete(pWhere);
  return;
}

Changes to src/vdbe.c.

39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
...
833
834
835
836
837
838
839
840
841
842
843





844
845
846
847
848

849
850
851
852
853
854
855
...
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
....
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.264 2004/02/14 23:59:58 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
................................................................................
    pTo->z = pTo->zShort;
  }
  pTos--;
  break;
}


/* Opcode: ColumnName P1 * P3
**
** P3 becomes the P1-th column name (first is 0).  An array of pointers
** to all column names is passed as the 4th parameter to the callback.





*/
case OP_ColumnName: {
  assert( pOp->p1>=0 && pOp->p1<p->nOp );
  p->azColName[pOp->p1] = pOp->p3;
  p->nCallback = 0;

  break;
}

/* Opcode: Callback P1 * *
**
** Pop P1 values off the stack and form them into an array.  Then
** invoke the callback function using the newly formed array as the
................................................................................
      Stringify(pCol);
      azArgv[i] = pCol->z;
    }
  }
  azArgv[i] = 0;
  p->nCallback++;
  p->azResColumn = azArgv;
  p->nResColumn = pOp->p1;
  p->popStack = pOp->p1;
  p->pc = pc + 1;
  p->pTos = pTos;
  return SQLITE_ROW;
}

/* Opcode: NullCallback P1 * *
**
** Invoke the callback function once with the 2nd argument (the
** number of columns) equal to P1 and with the 4th argument (the
** names of the columns) set according to prior OP_ColumnName
** instructions.  This is all like the regular
** OP_Callback or OP_SortCallback opcodes.  But the 3rd argument
** which normally contains a pointer to an array of pointers to
** data is NULL.
**
** The callback is only invoked if there have been no prior calls
** to OP_Callback or OP_SortCallback.
**
** This opcode is used to report the number and names of columns
** in cases where the result set is empty.
*/
case OP_NullCallback: {
  p->nResColumn = pOp->p1;
  if( p->nCallback==0 && (db->flags & SQLITE_NullCallback)!=0 ){
    p->azResColumn = 0;
    p->popStack = 0;
    p->pc = pc + 1;
    p->pTos = pTos;
    p->nCallback++;
    return SQLITE_ROW;
  }
  break;
}

/* Opcode: Concat P1 P2 P3
**
** Look at the first P1 elements of the stack.  Append them all 
** together with the lowest element first.  Use P3 as a separator.  
** Put the result on the top of the stack.  The original P1 elements
** are popped from the stack if P2==0 and retained if P2==1.  If
** any element of the stack is NULL, then the result is NULL.
................................................................................
*/
case OP_SortCallback: {
  assert( pTos>=p->aStack );
  assert( pTos->flags & MEM_Str );
  p->nCallback++;
  p->pc = pc+1;
  p->azResColumn = (char**)pTos->z;
  p->nResColumn = pOp->p1;
  p->popStack = 1;
  p->pTos = pTos;
  return SQLITE_ROW;
}

/* Opcode: SortReset * * *
**







|







 







|



>
>
>
>
>





>







 







|






<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<







 







|







39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
...
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
...
875
876
877
878
879
880
881
882
883
884
885
886
887
888





























889
890
891
892
893
894
895
....
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.265 2004/02/16 03:44:02 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
................................................................................
    pTo->z = pTo->zShort;
  }
  pTos--;
  break;
}


/* Opcode: ColumnName P1 P2 P3
**
** P3 becomes the P1-th column name (first is 0).  An array of pointers
** to all column names is passed as the 4th parameter to the callback.
** If P2==1 then this is the last column in the result set and thus the
** number of columns in the result set will be P1.  There must be at least
** one OP_ColumnName with a P2==1 before invoking OP_Callback and the
** number of columns specified in OP_Callback must one more than the P1
** value of the OP_ColumnName that has P2==1.
*/
case OP_ColumnName: {
  assert( pOp->p1>=0 && pOp->p1<p->nOp );
  p->azColName[pOp->p1] = pOp->p3;
  p->nCallback = 0;
  if( pOp->p2 ) p->nResColumn = pOp->p1+1;
  break;
}

/* Opcode: Callback P1 * *
**
** Pop P1 values off the stack and form them into an array.  Then
** invoke the callback function using the newly formed array as the
................................................................................
      Stringify(pCol);
      azArgv[i] = pCol->z;
    }
  }
  azArgv[i] = 0;
  p->nCallback++;
  p->azResColumn = azArgv;
  assert( p->nResColumn==pOp->p1 );
  p->popStack = pOp->p1;
  p->pc = pc + 1;
  p->pTos = pTos;
  return SQLITE_ROW;
}






























/* Opcode: Concat P1 P2 P3
**
** Look at the first P1 elements of the stack.  Append them all 
** together with the lowest element first.  Use P3 as a separator.  
** Put the result on the top of the stack.  The original P1 elements
** are popped from the stack if P2==0 and retained if P2==1.  If
** any element of the stack is NULL, then the result is NULL.
................................................................................
*/
case OP_SortCallback: {
  assert( pTos>=p->aStack );
  assert( pTos->flags & MEM_Str );
  p->nCallback++;
  p->pc = pc+1;
  p->azResColumn = (char**)pTos->z;
  assert( p->nResColumn==pOp->p1 );
  p->popStack = 1;
  p->pTos = pTos;
  return SQLITE_ROW;
}

/* Opcode: SortReset * * *
**