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Fix for bug #15: Add the sqlite_changes() API function for retrieving the

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number of rows that changed in the previous operation. (CVS 526)

FossilOrigin-Name: 6e71493b9dc77d508c3ce90562766789e87e6d80
This commit is contained in:
drh
2002-04-12 10:08:59 +00:00
parent b04a5d8768
commit c8d30ac109
15 changed files with 172 additions and 59 deletions
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28
src/vdbe.c
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@@ -30,7 +30,7 @@
** But other routines are also provided to help in building up
** a program instruction by instruction.
**
** $Id: vdbe.c,v 1.137 2002/04/09 03:15:07 drh Exp $
** $Id: vdbe.c,v 1.138 2002/04/12 10:09:00 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -3155,19 +3155,16 @@ case OP_NewRecno: {
** stack. The key is the next value down on the stack. The key must
** be an integer. The stack is popped twice by this instruction.
**
** If P2==1 then overwriting is prohibited. If a prior entry with
** the same key exists, an SQLITE_CONSTRAINT exception is raised.
** If P2==1 then the row change count is incremented. If P2==0 the
** row change count is unmodified.
*/
/* Opcode: PutStrKey P1 P2 *
/* Opcode: PutStrKey P1 * *
**
** Write an entry into the database file P1. A new entry is
** created if it doesn't already exist or the data for an existing
** entry is overwritten. The data is the value on the top of the
** stack. The key is the next value down on the stack. The key must
** be a string. The stack is popped twice by this instruction.
**
** If P2==1 then overwriting is prohibited. If a prior entry with
** the same key exists, an SQLITE_CONSTRAINT exception is raised.
*/
case OP_PutIntKey:
case OP_PutStrKey: {
@@ -3188,16 +3185,7 @@ case OP_PutStrKey: {
iKey = intToKey(aStack[nos].i);
zKey = (char*)&iKey;
db->lastRowid = aStack[nos].i;
}
if( pOp->p2 ){
int res;
rc = sqliteBtreeMoveto(p->aCsr[i].pCursor, zKey, nKey, &res);
if( res==0 && rc==SQLITE_OK ){
rc = SQLITE_CONSTRAINT;
}
if( rc!=SQLITE_OK ){
goto abort_due_to_error;
}
if( pOp->p2 ) db->nChange++;
}
rc = sqliteBtreeInsert(p->aCsr[i].pCursor, zKey, nKey,
zStack[tos], aStack[tos].n);
@@ -3208,7 +3196,7 @@ case OP_PutStrKey: {
break;
}
/* Opcode: Delete P1 * *
/* Opcode: Delete P1 P2 *
**
** Delete the record at which the P1 cursor is currently pointing.
**
@@ -3216,12 +3204,16 @@ case OP_PutStrKey: {
** record in the table. If it is left pointing at the next record, then
** the next Next instruction will be a no-op. Hence it is OK to delete
** a record from within an Next loop.
**
** The row change counter is incremented if P2==1 and is unmodified
** if P2==0.
*/
case OP_Delete: {
int i = pOp->p1;
if( VERIFY( i>=0 && i<p->nCursor && ) p->aCsr[i].pCursor!=0 ){
rc = sqliteBtreeDelete(p->aCsr[i].pCursor);
}
if( pOp->p2 ) db->nChange++;
break;
}