/ Check-in [e68e4282]
Login

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

Overview
Comment:Make sqlite3_count_changes() and total_changes() work with "DELETE FROM ". (CVS 5844)
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: e68e4282adb9003aa297d033aeb5d9cadee215cd
User & Date: danielk1977 2008-10-27 13:59:34
Context
2008-10-27
15:34
If an SQLITE_DELETE authorization callback returns SQLITE_IGNORE, proceed with the delete operation but disable the truncate optimization. (CVS 5845) check-in: 65a2e131 user: danielk1977 tags: trunk
13:59
Make sqlite3_count_changes() and total_changes() work with "DELETE FROM ". (CVS 5844)
check-in: e68e4282 user: danielk1977 tags: trunk
08:24
Remove some if() conditions that are always true from delete.c. (CVS 5843) check-in: 297ad90d user: danielk1977 tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/btree.c.

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
....
6183
6184
6185
6186
6187
6188
6189
6190

6191
6192
6193
6194
6195
6196
6197
....
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215



6216
6217
6218
6219
6220
6221
6222
....
6229
6230
6231
6232
6233
6234
6235




6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
....
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.525 2008/10/08 17:58:49 danielk1977 Exp $
**
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
** Including a description of file format and an overview of operation.
*/
#include "btreeInt.h"

................................................................................
** Erase the given database page and all its children.  Return
** the page to the freelist.
*/
static int clearDatabasePage(
  BtShared *pBt,           /* The BTree that contains the table */
  Pgno pgno,            /* Page number to clear */
  MemPage *pParent,     /* Parent page.  NULL for the root */
  int freePageFlag      /* Deallocate page if true */

){
  MemPage *pPage = 0;
  int rc;
  unsigned char *pCell;
  int i;

  assert( sqlite3_mutex_held(pBt->mutex) );
................................................................................
  }

  rc = getAndInitPage(pBt, pgno, &pPage);
  if( rc ) goto cleardatabasepage_out;
  for(i=0; i<pPage->nCell; i++){
    pCell = findCell(pPage, i);
    if( !pPage->leaf ){
      rc = clearDatabasePage(pBt, get4byte(pCell), pPage, 1);
      if( rc ) goto cleardatabasepage_out;
    }
    rc = clearCell(pPage, pCell);
    if( rc ) goto cleardatabasepage_out;
  }
  if( !pPage->leaf ){
    rc = clearDatabasePage(pBt, get4byte(&pPage->aData[8]), pPage, 1);
    if( rc ) goto cleardatabasepage_out;



  }
  if( freePageFlag ){
    rc = freePage(pPage);
  }else if( (rc = sqlite3PagerWrite(pPage->pDbPage))==0 ){
    zeroPage(pPage, pPage->aData[0] | PTF_LEAF);
  }

................................................................................
** Delete all information from a single table in the database.  iTable is
** the page number of the root of the table.  After this routine returns,
** the root page is empty, but still exists.
**
** This routine will fail with SQLITE_LOCKED if there are any open
** read cursors on the table.  Open write cursors are moved to the
** root of the table.




*/
int sqlite3BtreeClearTable(Btree *p, int iTable){
  int rc;
  BtShared *pBt = p->pBt;
  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  if( p->inTrans!=TRANS_WRITE ){
    rc = pBt->readOnly ? SQLITE_READONLY : SQLITE_ERROR;
  }else if( (rc = checkReadLocks(p, iTable, 0, 1))!=SQLITE_OK ){
    /* nothing to do */
  }else if( SQLITE_OK!=(rc = saveAllCursors(pBt, iTable, 0)) ){
    /* nothing to do */
  }else{
    rc = clearDatabasePage(pBt, (Pgno)iTable, 0, 0);
  }
  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Erase all information in a table and add the root of the table to
................................................................................
  */
  if( pBt->pCursor ){
    return SQLITE_LOCKED;
  }

  rc = sqlite3BtreeGetPage(pBt, (Pgno)iTable, &pPage, 0);
  if( rc ) return rc;
  rc = sqlite3BtreeClearTable(p, iTable);
  if( rc ){
    releasePage(pPage);
    return rc;
  }

  *piMoved = 0;








|







 







|
>







 







|






|

>
>
>







 







>
>
>
>

|











|







 







|







5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
....
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
....
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
....
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
....
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.526 2008/10/27 13:59:34 danielk1977 Exp $
**
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
** Including a description of file format and an overview of operation.
*/
#include "btreeInt.h"

................................................................................
** Erase the given database page and all its children.  Return
** the page to the freelist.
*/
static int clearDatabasePage(
  BtShared *pBt,           /* The BTree that contains the table */
  Pgno pgno,            /* Page number to clear */
  MemPage *pParent,     /* Parent page.  NULL for the root */
  int freePageFlag,     /* Deallocate page if true */
  int *pnChange
){
  MemPage *pPage = 0;
  int rc;
  unsigned char *pCell;
  int i;

  assert( sqlite3_mutex_held(pBt->mutex) );
................................................................................
  }

  rc = getAndInitPage(pBt, pgno, &pPage);
  if( rc ) goto cleardatabasepage_out;
  for(i=0; i<pPage->nCell; i++){
    pCell = findCell(pPage, i);
    if( !pPage->leaf ){
      rc = clearDatabasePage(pBt, get4byte(pCell), pPage, 1, pnChange);
      if( rc ) goto cleardatabasepage_out;
    }
    rc = clearCell(pPage, pCell);
    if( rc ) goto cleardatabasepage_out;
  }
  if( !pPage->leaf ){
    rc = clearDatabasePage(pBt, get4byte(&pPage->aData[8]), pPage, 1, pnChange);
    if( rc ) goto cleardatabasepage_out;
  }else if( pnChange ){
    assert( pPage->intKey );
    *pnChange += pPage->nCell;
  }
  if( freePageFlag ){
    rc = freePage(pPage);
  }else if( (rc = sqlite3PagerWrite(pPage->pDbPage))==0 ){
    zeroPage(pPage, pPage->aData[0] | PTF_LEAF);
  }

................................................................................
** Delete all information from a single table in the database.  iTable is
** the page number of the root of the table.  After this routine returns,
** the root page is empty, but still exists.
**
** This routine will fail with SQLITE_LOCKED if there are any open
** read cursors on the table.  Open write cursors are moved to the
** root of the table.
**
** If pnChange is not NULL, then table iTable must be an intkey table. The
** integer value pointed to by pnChange is incremented by the number of
** entries in the table.
*/
int sqlite3BtreeClearTable(Btree *p, int iTable, int *pnChange){
  int rc;
  BtShared *pBt = p->pBt;
  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  if( p->inTrans!=TRANS_WRITE ){
    rc = pBt->readOnly ? SQLITE_READONLY : SQLITE_ERROR;
  }else if( (rc = checkReadLocks(p, iTable, 0, 1))!=SQLITE_OK ){
    /* nothing to do */
  }else if( SQLITE_OK!=(rc = saveAllCursors(pBt, iTable, 0)) ){
    /* nothing to do */
  }else{
    rc = clearDatabasePage(pBt, (Pgno)iTable, 0, 0, pnChange);
  }
  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Erase all information in a table and add the root of the table to
................................................................................
  */
  if( pBt->pCursor ){
    return SQLITE_LOCKED;
  }

  rc = sqlite3BtreeGetPage(pBt, (Pgno)iTable, &pPage, 0);
  if( rc ) return rc;
  rc = sqlite3BtreeClearTable(p, iTable, 0);
  if( rc ){
    releasePage(pPage);
    return rc;
  }

  *piMoved = 0;

Changes to src/btree.h.

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
...
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite B-Tree file
** subsystem.  See comments in the source code for a detailed description
** of what each interface routine does.
**
** @(#) $Id: btree.h,v 1.104 2008/10/08 17:58:49 danielk1977 Exp $
*/
#ifndef _BTREE_H_
#define _BTREE_H_

/* TODO: This definition is just included so other modules compile. It
** needs to be revisited.
*/
................................................................................
** of the following flags:
*/
#define BTREE_INTKEY     1    /* Table has only 64-bit signed integer keys */
#define BTREE_ZERODATA   2    /* Table has keys only - no data */
#define BTREE_LEAFDATA   4    /* Data stored in leaves only.  Implies INTKEY */

int sqlite3BtreeDropTable(Btree*, int, int*);
int sqlite3BtreeClearTable(Btree*, int);
int sqlite3BtreeGetMeta(Btree*, int idx, u32 *pValue);
int sqlite3BtreeUpdateMeta(Btree*, int idx, u32 value);
void sqlite3BtreeTripAllCursors(Btree*, int);

int sqlite3BtreeCursor(
  Btree*,                              /* BTree containing table to open */
  int iTable,                          /* Index of root page */







|







 







|







9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
...
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite B-Tree file
** subsystem.  See comments in the source code for a detailed description
** of what each interface routine does.
**
** @(#) $Id: btree.h,v 1.105 2008/10/27 13:59:34 danielk1977 Exp $
*/
#ifndef _BTREE_H_
#define _BTREE_H_

/* TODO: This definition is just included so other modules compile. It
** needs to be revisited.
*/
................................................................................
** of the following flags:
*/
#define BTREE_INTKEY     1    /* Table has only 64-bit signed integer keys */
#define BTREE_ZERODATA   2    /* Table has keys only - no data */
#define BTREE_LEAFDATA   4    /* Data stored in leaves only.  Implies INTKEY */

int sqlite3BtreeDropTable(Btree*, int, int*);
int sqlite3BtreeClearTable(Btree*, int, int*);
int sqlite3BtreeGetMeta(Btree*, int idx, u32 *pValue);
int sqlite3BtreeUpdateMeta(Btree*, int idx, u32 value);
void sqlite3BtreeTripAllCursors(Btree*, int);

int sqlite3BtreeCursor(
  Btree*,                              /* BTree containing table to open */
  int iTable,                          /* Index of root page */

Changes to src/delete.c.

8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
...
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
**    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
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.183 2008/10/27 08:24:38 danielk1977 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.
................................................................................
  Index *pIdx;           /* For looping over indices of the table */
  int iCur;              /* VDBE Cursor number for pTab */
  sqlite3 *db;           /* Main database structure */
  AuthContext sContext;  /* Authorization context */
  int oldIdx = -1;       /* Cursor for the OLD table of AFTER triggers */
  NameContext sNC;       /* Name context to resolve expressions in */
  int iDb;               /* Database number */
  int memCnt = 0;        /* Memory cell used for change counting */

#ifndef SQLITE_OMIT_TRIGGER
  int isView;                  /* True if attempting to delete from a view */
  int triggers_exist = 0;      /* True if any triggers exist */
#endif
  int iBeginAfterTrigger;      /* Address of after trigger program */
  int iEndAfterTrigger;        /* Exit of after trigger program */
................................................................................
#ifndef SQLITE_OMIT_TRUNCATE_OPTIMIZATION
  /* Special case: A DELETE without a WHERE clause deletes everything.
  ** It is easier just to erase the whole table.  Note, however, that
  ** this means that the row change count will be incorrect.
  */
  if( pWhere==0 && !triggers_exist && !IsVirtual(pTab) ){
    assert( !isView );
    if( db->flags & SQLITE_CountRows ){
      /* If counting rows deleted, just count the total number of
      ** entries in the table. */
      int addr2;
      sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenRead);
      sqlite3VdbeAddOp2(v, OP_Rewind, iCur, sqlite3VdbeCurrentAddr(v)+2);
      addr2 = sqlite3VdbeAddOp2(v, OP_AddImm, memCnt, 1);
      sqlite3VdbeAddOp2(v, OP_Next, iCur, addr2);
      sqlite3VdbeAddOp1(v, OP_Close, iCur);
    }
    sqlite3VdbeAddOp2(v, OP_Clear, pTab->tnum, iDb);
    if( !pParse->nested ){
      sqlite3VdbeChangeP4(v, -1, pTab->zName, P4_STATIC);
    }
    for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
      assert( pIdx->pSchema==pTab->pSchema );
      sqlite3VdbeAddOp2(v, OP_Clear, pIdx->tnum, iDb);
    }







|







 







|







 







<
<
<
<
<
<
<
<
<
<
|







8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
...
368
369
370
371
372
373
374










375
376
377
378
379
380
381
382
**    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
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.184 2008/10/27 13:59:34 danielk1977 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.
................................................................................
  Index *pIdx;           /* For looping over indices of the table */
  int iCur;              /* VDBE Cursor number for pTab */
  sqlite3 *db;           /* Main database structure */
  AuthContext sContext;  /* Authorization context */
  int oldIdx = -1;       /* Cursor for the OLD table of AFTER triggers */
  NameContext sNC;       /* Name context to resolve expressions in */
  int iDb;               /* Database number */
  int memCnt = -1;       /* Memory cell used for change counting */

#ifndef SQLITE_OMIT_TRIGGER
  int isView;                  /* True if attempting to delete from a view */
  int triggers_exist = 0;      /* True if any triggers exist */
#endif
  int iBeginAfterTrigger;      /* Address of after trigger program */
  int iEndAfterTrigger;        /* Exit of after trigger program */
................................................................................
#ifndef SQLITE_OMIT_TRUNCATE_OPTIMIZATION
  /* Special case: A DELETE without a WHERE clause deletes everything.
  ** It is easier just to erase the whole table.  Note, however, that
  ** this means that the row change count will be incorrect.
  */
  if( pWhere==0 && !triggers_exist && !IsVirtual(pTab) ){
    assert( !isView );










    sqlite3VdbeAddOp3(v, OP_Clear, pTab->tnum, iDb, memCnt);
    if( !pParse->nested ){
      sqlite3VdbeChangeP4(v, -1, pTab->zName, P4_STATIC);
    }
    for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
      assert( pIdx->pSchema==pTab->pSchema );
      sqlite3VdbeAddOp2(v, OP_Clear, pIdx->tnum, iDb);
    }

Changes to src/test3.c.

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
...
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Code for testing the btree.c module in SQLite.  This code
** is not included in the SQLite library.  It is used for automated
** testing of the SQLite library.
**
** $Id: test3.c,v 1.101 2008/08/13 19:11:48 drh Exp $
*/
#include "sqliteInt.h"
#include "btreeInt.h"
#include "tcl.h"
#include <stdlib.h>
#include <string.h>

................................................................................
    Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
       " ID TABLENUM\"", 0);
    return TCL_ERROR;
  }
  pBt = sqlite3TestTextToPtr(argv[1]);
  if( Tcl_GetInt(interp, argv[2], &iTable) ) return TCL_ERROR;
  sqlite3BtreeEnter(pBt);
  rc = sqlite3BtreeClearTable(pBt, iTable);
  sqlite3BtreeLeave(pBt);
  if( rc!=SQLITE_OK ){
    Tcl_AppendResult(interp, errorName(rc), 0);
    return TCL_ERROR;
  }
  return TCL_OK;
}







|







 







|







9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
...
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Code for testing the btree.c module in SQLite.  This code
** is not included in the SQLite library.  It is used for automated
** testing of the SQLite library.
**
** $Id: test3.c,v 1.102 2008/10/27 13:59:34 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "btreeInt.h"
#include "tcl.h"
#include <stdlib.h>
#include <string.h>

................................................................................
    Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
       " ID TABLENUM\"", 0);
    return TCL_ERROR;
  }
  pBt = sqlite3TestTextToPtr(argv[1]);
  if( Tcl_GetInt(interp, argv[2], &iTable) ) return TCL_ERROR;
  sqlite3BtreeEnter(pBt);
  rc = sqlite3BtreeClearTable(pBt, iTable, 0);
  sqlite3BtreeLeave(pBt);
  if( rc!=SQLITE_OK ){
    Tcl_AppendResult(interp, errorName(rc), 0);
    return TCL_ERROR;
  }
  return TCL_OK;
}

Changes to src/vdbe.c.

39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
....
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054






4055
4056
4057

4058
4059








4060
4061
4062
4063
4064
4065
4066
**
** 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 1.782 2008/10/08 17:58:49 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor
................................................................................
      sqlite3RootPageMoved(&db->aDb[iDb], iMoved, pOp->p1);
    }
#endif
  }
  break;
}

/* Opcode: Clear P1 P2 *
**
** Delete all contents of the database table or index whose root page
** in the database file is given by P1.  But, unlike Destroy, do not
** remove the table or index from the database file.
**
** The table being clear is in the main database file if P2==0.  If
** P2==1 then the table to be clear is in the auxiliary database file
** that is used to store tables create using CREATE TEMPORARY TABLE.
**






** See also: Destroy
*/
case OP_Clear: {

  assert( (p->btreeMask & (1<<pOp->p2))!=0 );
  rc = sqlite3BtreeClearTable(db->aDb[pOp->p2].pBt, pOp->p1);








  break;
}

/* Opcode: CreateTable P1 P2 * * *
**
** Allocate a new table in the main database file if P1==0 or in the
** auxiliary database file if P1==1 or in an attached database if







|







 







|









>
>
>
>
>
>



>

|
>
>
>
>
>
>
>
>







39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
....
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
**
** 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 1.783 2008/10/27 13:59:34 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor
................................................................................
      sqlite3RootPageMoved(&db->aDb[iDb], iMoved, pOp->p1);
    }
#endif
  }
  break;
}

/* Opcode: Clear P1 P2 P3
**
** Delete all contents of the database table or index whose root page
** in the database file is given by P1.  But, unlike Destroy, do not
** remove the table or index from the database file.
**
** The table being clear is in the main database file if P2==0.  If
** P2==1 then the table to be clear is in the auxiliary database file
** that is used to store tables create using CREATE TEMPORARY TABLE.
**
** If the P3 value is non-zero, then the table refered to must be an
** intkey table (an SQL table, not an index). In this case the row change 
** count is incremented by the number of rows in the table being cleared. 
** If P3 is greater than zero, then the value stored in register P3 is
** also incremented by the number of rows in the table being cleared.
**
** See also: Destroy
*/
case OP_Clear: {
  int nChange = 0;
  assert( (p->btreeMask & (1<<pOp->p2))!=0 );
  rc = sqlite3BtreeClearTable(
      db->aDb[pOp->p2].pBt, pOp->p1, (pOp->p3 ? &nChange : 0)
  );
  if( pOp->p3 ){
    p->nChange += nChange;
    if( pOp->p3>0 ){
      p->aMem[pOp->p3].u.i += nChange;
    }
  }
  break;
}

/* Opcode: CreateTable P1 P2 * * *
**
** Allocate a new table in the main database file if P1==0 or in the
** auxiliary database file if P1==1 or in an attached database if

Changes to test/laststmtchanges.test.


1
2
3
4
5
6
7
..
15
16
17
18
19
20
21

22
23
24
25
26
27
28
...
274
275
276
277
278
279
280
















































281

# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
................................................................................
#         statement).
# Note 2: changes() is changed within the context of a trigger much like 
#         last_insert_rowid() (see lastinsert.test), but is restored once
#         the trigger exits.
# Note 3: changes() is not changed by a change to a view (since everything
#         is done within instead of trigger context).
#


set testdir [file dirname $argv0]
source $testdir/tester.tcl

# ----------------------------------------------------------------------------
# 1.x - basic tests (no triggers)

................................................................................
    catchsql {
        select n from n2;
    }
} {0 {0 1 0 3}}

} ;# ifcapable view

















































finish_test
>







 







>







 







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>

1
2
3
4
5
6
7
8
..
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
...
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
................................................................................
#         statement).
# Note 2: changes() is changed within the context of a trigger much like 
#         last_insert_rowid() (see lastinsert.test), but is restored once
#         the trigger exits.
# Note 3: changes() is not changed by a change to a view (since everything
#         is done within instead of trigger context).
#
# $Id: laststmtchanges.test,v 1.7 2008/10/27 13:59:34 danielk1977 Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# ----------------------------------------------------------------------------
# 1.x - basic tests (no triggers)

................................................................................
    catchsql {
        select n from n2;
    }
} {0 {0 1 0 3}}

} ;# ifcapable view


# ----------------------------------------------------------------------------
# 6.x - Test "DELETE FROM <table>" in the absence of triggers
#
do_test laststmtchanges-6.1 {
  execsql {
    CREATE TABLE t3(a, b, c);
    INSERT INTO t3 VALUES(1, 2, 3);
    INSERT INTO t3 VALUES(4, 5, 6);
  }
} {}
do_test laststmtchanges-6.2 {
  execsql {
    BEGIN;
    DELETE FROM t3;
    SELECT changes();
  }
} {2}
do_test laststmtchanges-6.3 {
  execsql {
    ROLLBACK;
    BEGIN;
    DELETE FROM t3 WHERE a IS NOT NULL;
    SELECT changes();
  }
} {2}
do_test laststmtchanges-6.4 {
  execsql {
    ROLLBACK;
    CREATE INDEX t3_i1 ON t3(a);
    BEGIN;
    DELETE FROM t3;
    SELECT changes();
  }
} {2}
do_test laststmtchanges-6.5 {
  execsql { ROLLBACK }
  set nTotalChange [execsql {SELECT total_changes()}]
  expr 0
} {0}
do_test laststmtchanges-6.6 {
  execsql {
    SELECT total_changes();
    DELETE FROM t3;
    SELECT total_changes();
  }
} [list $nTotalChange [expr $nTotalChange+2]]

finish_test