Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Merge the OFFSET-on-query-without-FROM fix from trunk. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | orderby-planning |
| Files: | files | file ages | folders |
| SHA1: |
71e9ae72c272dc86720b2bfe719f57de |
| User & Date: | drh 2014-03-21 18:45:19 |
Context
|
2014-03-23
| ||
| 17:45 | Use only a single OP_MakeRecord instead of two when constructing entries to go onto a sorter. check-in: d696cded user: drh tags: orderby-planning | |
|
2014-03-21
| ||
| 20:58 | Add the ability to use indices for the first few terms of an ORDER BY clause, then sort in batches to handle the later terms. check-in: fa06a6fe user: drh tags: trunk | |
| 18:45 | Merge the OFFSET-on-query-without-FROM fix from trunk. check-in: 71e9ae72 user: drh tags: orderby-planning | |
| 18:16 | Fix the OFFSET clause so that it works correctly on queries that lack a FROM clause. Ticket [07d6a0453d4ed8]. check-in: 179ef816 user: drh tags: trunk | |
| 15:24 | New test case for block-sorting. check-in: e70cfa28 user: drh tags: orderby-planning | |
Changes
Changes to src/select.c.
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
...
627
628
629
630
631
632
633
634
635
636
637
638
639
640
|
** Add code to implement the OFFSET
*/
static void codeOffset(
Vdbe *v, /* Generate code into this VM */
int iOffset, /* Register holding the offset counter */
int iContinue /* Jump here to skip the current record */
){
if( iOffset>0 && iContinue!=0 ){
int addr;
sqlite3VdbeAddOp2(v, OP_AddImm, iOffset, -1);
addr = sqlite3VdbeAddOp1(v, OP_IfNeg, iOffset); VdbeCoverage(v);
sqlite3VdbeAddOp2(v, OP_Goto, 0, iContinue);
VdbeComment((v, "skip OFFSET records"));
sqlite3VdbeJumpHere(v, addr);
}
................................................................................
int nResultCol; /* Number of result columns */
assert( v );
assert( pEList!=0 );
hasDistinct = pDistinct ? pDistinct->eTnctType : WHERE_DISTINCT_NOOP;
if( pSort && pSort->pOrderBy==0 ) pSort = 0;
if( pSort==0 && !hasDistinct ){
codeOffset(v, p->iOffset, iContinue);
}
/* Pull the requested columns.
*/
nResultCol = pEList->nExpr;
|
|
>
|
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
...
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
|
** Add code to implement the OFFSET
*/
static void codeOffset(
Vdbe *v, /* Generate code into this VM */
int iOffset, /* Register holding the offset counter */
int iContinue /* Jump here to skip the current record */
){
if( iOffset>0 ){
int addr;
sqlite3VdbeAddOp2(v, OP_AddImm, iOffset, -1);
addr = sqlite3VdbeAddOp1(v, OP_IfNeg, iOffset); VdbeCoverage(v);
sqlite3VdbeAddOp2(v, OP_Goto, 0, iContinue);
VdbeComment((v, "skip OFFSET records"));
sqlite3VdbeJumpHere(v, addr);
}
................................................................................
int nResultCol; /* Number of result columns */
assert( v );
assert( pEList!=0 );
hasDistinct = pDistinct ? pDistinct->eTnctType : WHERE_DISTINCT_NOOP;
if( pSort && pSort->pOrderBy==0 ) pSort = 0;
if( pSort==0 && !hasDistinct ){
assert( iContinue!=0 );
codeOffset(v, p->iOffset, iContinue);
}
/* Pull the requested columns.
*/
nResultCol = pEList->nExpr;
|
Changes to src/where.c.
43
44
45
46
47
48
49
50
51
52
53
54
55
56
....
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
|
}
/*
** Return the VDBE address or label to jump to in order to continue
** immediately with the next row of a WHERE clause.
*/
int sqlite3WhereContinueLabel(WhereInfo *pWInfo){
return pWInfo->iContinue;
}
/*
** Return the VDBE address or label to jump to in order to break
** out of a WHERE loop.
*/
................................................................................
}
pWInfo->aiCurOnePass[0] = pWInfo->aiCurOnePass[1] = -1;
pWInfo->nLevel = nTabList;
pWInfo->pParse = pParse;
pWInfo->pTabList = pTabList;
pWInfo->pOrderBy = pOrderBy;
pWInfo->pResultSet = pResultSet;
pWInfo->iBreak = sqlite3VdbeMakeLabel(v);
pWInfo->wctrlFlags = wctrlFlags;
pWInfo->savedNQueryLoop = pParse->nQueryLoop;
pMaskSet = &pWInfo->sMaskSet;
sWLB.pWInfo = pWInfo;
sWLB.pWC = &pWInfo->sWC;
sWLB.pNew = (WhereLoop*)(((char*)pWInfo)+nByteWInfo);
assert( EIGHT_BYTE_ALIGNMENT(sWLB.pNew) );
|
>
|
|
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
....
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
|
}
/*
** Return the VDBE address or label to jump to in order to continue
** immediately with the next row of a WHERE clause.
*/
int sqlite3WhereContinueLabel(WhereInfo *pWInfo){
assert( pWInfo->iContinue!=0 );
return pWInfo->iContinue;
}
/*
** Return the VDBE address or label to jump to in order to break
** out of a WHERE loop.
*/
................................................................................
}
pWInfo->aiCurOnePass[0] = pWInfo->aiCurOnePass[1] = -1;
pWInfo->nLevel = nTabList;
pWInfo->pParse = pParse;
pWInfo->pTabList = pTabList;
pWInfo->pOrderBy = pOrderBy;
pWInfo->pResultSet = pResultSet;
pWInfo->iBreak = pWInfo->iContinue = sqlite3VdbeMakeLabel(v);
pWInfo->wctrlFlags = wctrlFlags;
pWInfo->savedNQueryLoop = pParse->nQueryLoop;
pMaskSet = &pWInfo->sMaskSet;
sWLB.pWInfo = pWInfo;
sWLB.pWC = &pWInfo->sWC;
sWLB.pNew = (WhereLoop*)(((char*)pWInfo)+nByteWInfo);
assert( EIGHT_BYTE_ALIGNMENT(sWLB.pNew) );
|
Changes to test/limit.test.
611 612 613 614 615 616 617 618 619 |
} {32}
do_test limit-13.72 {
db eval {SELECT z FROM v13c LIMIT 2 OFFSET 7}
} {32}
do_test limit-13.81 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 8}
} {}
finish_test
|
> > > > > > > > > > > > > > > > > > > > |
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 |
} {32}
do_test limit-13.72 {
db eval {SELECT z FROM v13c LIMIT 2 OFFSET 7}
} {32}
do_test limit-13.81 {
db eval {SELECT z FROM v13c LIMIT 1 OFFSET 8}
} {}
do_execsql_test limit-14.1 {
SELECT 123 LIMIT 1 OFFSET 0
} {123}
do_execsql_test limit-14.2 {
SELECT 123 LIMIT 1 OFFSET 1
} {}
do_execsql_test limit-14.3 {
SELECT 123 LIMIT 0 OFFSET 0
} {}
do_execsql_test limit-14.4 {
SELECT 123 LIMIT 0 OFFSET 1
} {}
do_execsql_test limit-14.6 {
SELECT 123 LIMIT -1 OFFSET 0
} {123}
do_execsql_test limit-14.7 {
SELECT 123 LIMIT -1 OFFSET 1
} {}
finish_test
|