Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Clarification of the implementation of SQLITE_STMTSTATUS_FULLSCAN_STEP. No logical code changes - just commenting and layout changes to improve readability. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
06b9ca32255572a699dc51f46f848d0b |
| User & Date: | drh 2010-03-31 17:47:44.000 |
Context
|
2010-03-31
| ||
| 20:29 | Report corruption if a database contains a reference that is out of range according to the filesize-in-header database size. (check-in: a91db0b1cd user: drh tags: trunk) | |
| 17:47 | Clarification of the implementation of SQLITE_STMTSTATUS_FULLSCAN_STEP. No logical code changes - just commenting and layout changes to improve readability. (check-in: 06b9ca3225 user: drh tags: trunk) | |
| 15:02 | Clear the column cache before populating aggregate accumulator registers. Fix fo r [883034dcb5]. (check-in: ffc23409c7 user: dan tags: trunk) | |
Changes
Changes to src/vdbe.c.
| ︙ | ︙ | |||
4186 4187 4188 4189 4190 4191 4192 |
assert( pOp->p2>0 && pOp->p2<p->nOp );
if( res ){
pc = pOp->p2 - 1;
}
break;
}
| | > > > | > > > > | 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 |
assert( pOp->p2>0 && pOp->p2<p->nOp );
if( res ){
pc = pOp->p2 - 1;
}
break;
}
/* Opcode: Next P1 P2 * * P5
**
** Advance cursor P1 so that it points to the next key/data pair in its
** table or index. If there are no more key/value pairs then fall through
** to the following instruction. But if the cursor advance was successful,
** jump immediately to P2.
**
** The P1 cursor must be for a real table, not a pseudo-table.
**
** If P5 is positive and the jump is taken, then event counter
** number P5-1 in the prepared statement is incremented.
**
** See also: Prev
*/
/* Opcode: Prev P1 P2 * * P5
**
** Back up cursor P1 so that it points to the previous key/data pair in its
** table or index. If there is no previous key/value pairs then fall through
** to the following instruction. But if the cursor backup was successful,
** jump immediately to P2.
**
** The P1 cursor must be for a real table, not a pseudo-table.
**
** If P5 is positive and the jump is taken, then event counter
** number P5-1 in the prepared statement is incremented.
*/
case OP_Prev: /* jump */
case OP_Next: { /* jump */
VdbeCursor *pC;
BtCursor *pCrsr;
int res;
CHECK_FOR_INTERRUPT;
assert( pOp->p1>=0 && pOp->p1<p->nCursor );
assert( pOp->p5<=ArraySize(p->aCounter) );
pC = p->apCsr[pOp->p1];
if( pC==0 ){
break; /* See ticket #2273 */
}
pCrsr = pC->pCursor;
if( pCrsr==0 ){
pC->nullRow = 1;
|
| ︙ | ︙ |
Changes to src/where.c.
| ︙ | ︙ | |||
2994 2995 2996 2997 2998 2999 3000 |
}
disableTerm(pLevel, pEnd);
}
start = sqlite3VdbeCurrentAddr(v);
pLevel->op = bRev ? OP_Prev : OP_Next;
pLevel->p1 = iCur;
pLevel->p2 = start;
| | > > > > | 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 |
}
disableTerm(pLevel, pEnd);
}
start = sqlite3VdbeCurrentAddr(v);
pLevel->op = bRev ? OP_Prev : OP_Next;
pLevel->p1 = iCur;
pLevel->p2 = start;
if( pStart==0 && pEnd==0 ){
pLevel->p5 = SQLITE_STMTSTATUS_FULLSCAN_STEP;
}else{
assert( pLevel->p5==0 );
}
if( testOp!=OP_Noop ){
iRowidReg = iReleaseReg = sqlite3GetTempReg(pParse);
sqlite3VdbeAddOp2(v, OP_Rowid, iCur, iRowidReg);
sqlite3ExprCacheStore(pParse, iCur, -1, iRowidReg);
sqlite3VdbeAddOp3(v, testOp, memEndValue, addrBrk, iRowidReg);
sqlite3VdbeChangeP5(v, SQLITE_AFF_NUMERIC | SQLITE_JUMPIFNULL);
}
|
| ︙ | ︙ |