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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
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2014-03-23
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| 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 | |
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2014-03-21
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| 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.
533 533 ** Add code to implement the OFFSET 534 534 */ 535 535 static void codeOffset( 536 536 Vdbe *v, /* Generate code into this VM */ 537 537 int iOffset, /* Register holding the offset counter */ 538 538 int iContinue /* Jump here to skip the current record */ 539 539 ){ 540 - if( iOffset>0 && iContinue!=0 ){ 540 + if( iOffset>0 ){ 541 541 int addr; 542 542 sqlite3VdbeAddOp2(v, OP_AddImm, iOffset, -1); 543 543 addr = sqlite3VdbeAddOp1(v, OP_IfNeg, iOffset); VdbeCoverage(v); 544 544 sqlite3VdbeAddOp2(v, OP_Goto, 0, iContinue); 545 545 VdbeComment((v, "skip OFFSET records")); 546 546 sqlite3VdbeJumpHere(v, addr); 547 547 } ................................................................................ 627 627 int nResultCol; /* Number of result columns */ 628 628 629 629 assert( v ); 630 630 assert( pEList!=0 ); 631 631 hasDistinct = pDistinct ? pDistinct->eTnctType : WHERE_DISTINCT_NOOP; 632 632 if( pSort && pSort->pOrderBy==0 ) pSort = 0; 633 633 if( pSort==0 && !hasDistinct ){ 634 + assert( iContinue!=0 ); 634 635 codeOffset(v, p->iOffset, iContinue); 635 636 } 636 637 637 638 /* Pull the requested columns. 638 639 */ 639 640 nResultCol = pEList->nExpr; 640 641
Changes to src/where.c.
43 43 } 44 44 45 45 /* 46 46 ** Return the VDBE address or label to jump to in order to continue 47 47 ** immediately with the next row of a WHERE clause. 48 48 */ 49 49 int sqlite3WhereContinueLabel(WhereInfo *pWInfo){ 50 + assert( pWInfo->iContinue!=0 ); 50 51 return pWInfo->iContinue; 51 52 } 52 53 53 54 /* 54 55 ** Return the VDBE address or label to jump to in order to break 55 56 ** out of a WHERE loop. 56 57 */ ................................................................................ 5467 5468 } 5468 5469 pWInfo->aiCurOnePass[0] = pWInfo->aiCurOnePass[1] = -1; 5469 5470 pWInfo->nLevel = nTabList; 5470 5471 pWInfo->pParse = pParse; 5471 5472 pWInfo->pTabList = pTabList; 5472 5473 pWInfo->pOrderBy = pOrderBy; 5473 5474 pWInfo->pResultSet = pResultSet; 5474 - pWInfo->iBreak = sqlite3VdbeMakeLabel(v); 5475 + pWInfo->iBreak = pWInfo->iContinue = sqlite3VdbeMakeLabel(v); 5475 5476 pWInfo->wctrlFlags = wctrlFlags; 5476 5477 pWInfo->savedNQueryLoop = pParse->nQueryLoop; 5477 5478 pMaskSet = &pWInfo->sMaskSet; 5478 5479 sWLB.pWInfo = pWInfo; 5479 5480 sWLB.pWC = &pWInfo->sWC; 5480 5481 sWLB.pNew = (WhereLoop*)(((char*)pWInfo)+nByteWInfo); 5481 5482 assert( EIGHT_BYTE_ALIGNMENT(sWLB.pNew) );
Changes to test/limit.test.
611 611 } {32} 612 612 do_test limit-13.72 { 613 613 db eval {SELECT z FROM v13c LIMIT 2 OFFSET 7} 614 614 } {32} 615 615 do_test limit-13.81 { 616 616 db eval {SELECT z FROM v13c LIMIT 1 OFFSET 8} 617 617 } {} 618 + 619 +do_execsql_test limit-14.1 { 620 + SELECT 123 LIMIT 1 OFFSET 0 621 +} {123} 622 +do_execsql_test limit-14.2 { 623 + SELECT 123 LIMIT 1 OFFSET 1 624 +} {} 625 +do_execsql_test limit-14.3 { 626 + SELECT 123 LIMIT 0 OFFSET 0 627 +} {} 628 +do_execsql_test limit-14.4 { 629 + SELECT 123 LIMIT 0 OFFSET 1 630 +} {} 631 +do_execsql_test limit-14.6 { 632 + SELECT 123 LIMIT -1 OFFSET 0 633 +} {123} 634 +do_execsql_test limit-14.7 { 635 + SELECT 123 LIMIT -1 OFFSET 1 636 +} {} 637 + 618 638 619 639 finish_test