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Overview
| Comment: | Use only a single OP_MakeRecord instead of two when constructing entries to go onto a sorter. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | orderby-planning |
| Files: | files | file ages | folders |
| SHA1: | d696cdedacd39075aa7fc407ab7c7e50 |
| User & Date: | drh 2014-03-23 17:45:03 |
Context
|
2014-03-23
| ||
| 18:47 | merge fixes from trunk check-in: faf7f9ca user: drh tags: orderby-planning | |
| 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
| ||
| 18:45 | Merge the OFFSET-on-query-without-FROM fix from trunk. check-in: 71e9ae72 user: drh tags: orderby-planning | |
Changes
Changes to src/select.c.
451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 ... 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 ... 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 ... 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 ... 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 .... 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 .... 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 .... 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 |
Parse *pParse, /* Parsing context */ ExprList *pList, /* Form the KeyInfo object from this ExprList */ int iStart, /* Begin with this column of pList */ int nExtra /* Add this many extra columns to the end */ ); /* ** Insert code into "v" that will push the record in register regData ** into the sorter. */ static void pushOntoSorter( Parse *pParse, /* Parser context */ SortCtx *pSort, /* Information about the ORDER BY clause */ Select *pSelect, /* The whole SELECT statement */ int regData /* Register holding data to be sorted */ ){ Vdbe *v = pParse->pVdbe; int nExpr = pSort->pOrderBy->nExpr; int regBase = sqlite3GetTempRange(pParse, nExpr+2); int regRecord = sqlite3GetTempReg(pParse); int nOBSat = pSort->nOBSat; int op; sqlite3ExprCacheClear(pParse); sqlite3ExprCodeExprList(pParse, pSort->pOrderBy, regBase, 0); sqlite3VdbeAddOp2(v, OP_Sequence, pSort->iECursor, regBase+nExpr); sqlite3ExprCodeMove(pParse, regData, regBase+nExpr+1, 1); sqlite3VdbeAddOp3(v, OP_MakeRecord, regBase+nOBSat, nExpr+2-nOBSat, regRecord); if( nOBSat>0 ){ int regPrevKey; /* The first nOBSat columns of the previous row */ int addrFirst; /* Address of the OP_IfNot opcode */ int addrJmp; /* Address of the OP_Jump opcode */ VdbeOp *pOp; /* Opcode that opens the sorter */ int nKey; /* Number of sorting key columns, including OP_Sequence */ ................................................................................ op = OP_SorterInsert; }else{ op = OP_IdxInsert; } sqlite3VdbeAddOp2(v, op, pSort->iECursor, regRecord); if( nOBSat==0 ){ sqlite3ReleaseTempReg(pParse, regRecord); sqlite3ReleaseTempRange(pParse, regBase, nExpr+2); } if( pSelect->iLimit ){ int addr1, addr2; int iLimit; if( pSelect->iOffset ){ iLimit = pSelect->iOffset+1; }else{ ................................................................................ int addr = sqlite3VdbeCurrentAddr(v) + 4; sqlite3VdbeAddOp4Int(v, OP_Found, iParm+1, addr, r1, 0); VdbeCoverage(v); sqlite3VdbeAddOp2(v, OP_IdxInsert, iParm+1, r1); assert( pSort==0 ); } #endif if( pSort ){ pushOntoSorter(pParse, pSort, p, r1); }else{ int r2 = sqlite3GetTempReg(pParse); sqlite3VdbeAddOp2(v, OP_NewRowid, iParm, r2); sqlite3VdbeAddOp3(v, OP_Insert, iParm, r1, r2); sqlite3VdbeChangeP5(v, OPFLAG_APPEND); sqlite3ReleaseTempReg(pParse, r2); } ................................................................................ pDest->affSdst = sqlite3CompareAffinity(pEList->a[0].pExpr, pDest->affSdst); if( pSort ){ /* At first glance you would think we could optimize out the ** ORDER BY in this case since the order of entries in the set ** does not matter. But there might be a LIMIT clause, in which ** case the order does matter */ pushOntoSorter(pParse, pSort, p, regResult); }else{ int r1 = sqlite3GetTempReg(pParse); sqlite3VdbeAddOp4(v, OP_MakeRecord, regResult,1,r1, &pDest->affSdst, 1); sqlite3ExprCacheAffinityChange(pParse, regResult, 1); sqlite3VdbeAddOp2(v, OP_IdxInsert, iParm, r1); sqlite3ReleaseTempReg(pParse, r1); } ................................................................................ /* If this is a scalar select that is part of an expression, then ** store the results in the appropriate memory cell and break out ** of the scan loop. */ case SRT_Mem: { assert( nResultCol==1 ); if( pSort ){ pushOntoSorter(pParse, pSort, p, regResult); }else{ sqlite3ExprCodeMove(pParse, regResult, iParm, 1); /* The LIMIT clause will jump out of the loop for us */ } break; } #endif /* #ifndef SQLITE_OMIT_SUBQUERY */ case SRT_Coroutine: /* Send data to a co-routine */ case SRT_Output: { /* Return the results */ testcase( eDest==SRT_Coroutine ); testcase( eDest==SRT_Output ); if( pSort ){ int r1 = sqlite3GetTempReg(pParse); sqlite3VdbeAddOp3(v, OP_MakeRecord, regResult, nResultCol, r1); pushOntoSorter(pParse, pSort, p, r1); sqlite3ReleaseTempReg(pParse, r1); }else if( eDest==SRT_Coroutine ){ sqlite3VdbeAddOp1(v, OP_Yield, pDest->iSDParm); }else{ sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, nResultCol); sqlite3ExprCacheAffinityChange(pParse, regResult, nResultCol); } break; ................................................................................ int pseudoTab = 0; ExprList *pOrderBy = pSort->pOrderBy; int eDest = pDest->eDest; int iParm = pDest->iSDParm; int regRow; int regRowid; int nKey; if( pSort->labelBkOut ){ sqlite3VdbeAddOp2(v, OP_Gosub, pSort->regReturn, pSort->labelBkOut); sqlite3VdbeAddOp2(v, OP_Goto, 0, addrBreak); sqlite3VdbeResolveLabel(v, pSort->labelBkOut); addrOnce = sqlite3CodeOnce(pParse); VdbeCoverage(v); } iTab = pSort->iECursor; regRow = sqlite3GetTempReg(pParse); if( eDest==SRT_Output || eDest==SRT_Coroutine ){ pseudoTab = pParse->nTab++; sqlite3VdbeAddOp3(v, OP_OpenPseudo, pseudoTab, regRow, nColumn); regRowid = 0; }else{ regRowid = sqlite3GetTempReg(pParse); } nKey = pOrderBy->nExpr - pSort->nOBSat; if( pSort->sortFlags & SORTFLAG_UseSorter ){ int regSortOut = ++pParse->nMem; int ptab2 = pParse->nTab++; sqlite3VdbeAddOp3(v, OP_OpenPseudo, ptab2, regSortOut, nKey+2); if( addrOnce ) sqlite3VdbeJumpHere(v, addrOnce); addr = 1 + sqlite3VdbeAddOp2(v, OP_SorterSort, iTab, addrBreak); VdbeCoverage(v); codeOffset(v, p->iOffset, addrContinue); sqlite3VdbeAddOp2(v, OP_SorterData, iTab, regSortOut); sqlite3VdbeAddOp3(v, OP_Column, ptab2, nKey+1, regRow); sqlite3VdbeChangeP5(v, OPFLAG_CLEARCACHE); }else{ if( addrOnce ) sqlite3VdbeJumpHere(v, addrOnce); addr = 1 + sqlite3VdbeAddOp2(v, OP_Sort, iTab, addrBreak); VdbeCoverage(v); codeOffset(v, p->iOffset, addrContinue); sqlite3VdbeAddOp3(v, OP_Column, iTab, nKey+1, regRow); } switch( eDest ){ case SRT_Table: case SRT_EphemTab: { testcase( eDest==SRT_Table ); testcase( eDest==SRT_EphemTab ); sqlite3VdbeAddOp2(v, OP_NewRowid, iParm, regRowid); ................................................................................ assert( nColumn==1 ); sqlite3ExprCodeMove(pParse, regRow, iParm, 1); /* The LIMIT clause will terminate the loop for us */ break; } #endif default: { int i; assert( eDest==SRT_Output || eDest==SRT_Coroutine ); testcase( eDest==SRT_Output ); testcase( eDest==SRT_Coroutine ); for(i=0; i<nColumn; i++){ assert( regRow!=pDest->iSdst+i ); sqlite3VdbeAddOp3(v, OP_Column, pseudoTab, i, pDest->iSdst+i); if( i==0 ){ sqlite3VdbeChangeP5(v, OPFLAG_CLEARCACHE); } } if( eDest==SRT_Output ){ sqlite3VdbeAddOp2(v, OP_ResultRow, pDest->iSdst, nColumn); sqlite3ExprCacheAffinityChange(pParse, pDest->iSdst, nColumn); }else{ sqlite3VdbeAddOp1(v, OP_Yield, pDest->iSDParm); } break; } } sqlite3ReleaseTempReg(pParse, regRow); sqlite3ReleaseTempReg(pParse, regRowid); /* The bottom of the loop */ sqlite3VdbeResolveLabel(v, addrContinue); if( pSort->sortFlags & SORTFLAG_UseSorter ){ sqlite3VdbeAddOp2(v, OP_SorterNext, iTab, addr); VdbeCoverage(v); }else{ sqlite3VdbeAddOp2(v, OP_Next, iTab, addr); VdbeCoverage(v); } if( pSort->regReturn ) sqlite3VdbeAddOp1(v, OP_Return, pSort->regReturn); sqlite3VdbeResolveLabel(v, addrBreak); if( eDest==SRT_Output || eDest==SRT_Coroutine ){ sqlite3VdbeAddOp2(v, OP_Close, pseudoTab, 0); } } /* ** Return a pointer to a string containing the 'declaration type' of the ** expression pExpr. The string may be treated as static by the caller. ** ** Also try to estimate the size of the returned value and return that ................................................................................ */ if( sSort.pOrderBy ){ KeyInfo *pKeyInfo; pKeyInfo = keyInfoFromExprList(pParse, sSort.pOrderBy, 0, 0); sSort.iECursor = pParse->nTab++; sSort.addrSortIndex = sqlite3VdbeAddOp4(v, OP_OpenEphemeral, sSort.iECursor, sSort.pOrderBy->nExpr+2, 0, (char*)pKeyInfo, P4_KEYINFO); }else{ sSort.addrSortIndex = -1; } /* If the output is destined for a temporary table, open that table. */ if( pDest->eDest==SRT_EphemTab ){ |
| | | > | | > | | | < > > | | | | | | < < | < > > > > > > > > | | < | > > > > > > < < < < < < < < > | | | < < < | | > |
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Parse *pParse, /* Parsing context */ ExprList *pList, /* Form the KeyInfo object from this ExprList */ int iStart, /* Begin with this column of pList */ int nExtra /* Add this many extra columns to the end */ ); /* ** Generate code that will push the record in registers regData ** through regData+nData-1 onto the sorter. */ static void pushOntoSorter( Parse *pParse, /* Parser context */ SortCtx *pSort, /* Information about the ORDER BY clause */ Select *pSelect, /* The whole SELECT statement */ int regData, /* First register holding data to be sorted */ int nData /* Number of elements in the data array */ ){ Vdbe *v = pParse->pVdbe; /* Stmt under construction */ int nExpr = pSort->pOrderBy->nExpr; /* No. of ORDER BY terms */ int nBase = nExpr + 1 + nData; /* Fields in sorter record */ int regBase = sqlite3GetTempRange(pParse, nBase); /* Regs for sorter record */ int regRecord = sqlite3GetTempReg(pParse); /* Assemblied sorter record */ int nOBSat = pSort->nOBSat; /* No. ORDER BY terms to skip */ int op; /* Opcode to add sorter record to sorter */ sqlite3ExprCacheClear(pParse); sqlite3ExprCodeExprList(pParse, pSort->pOrderBy, regBase, 0); sqlite3VdbeAddOp2(v, OP_Sequence, pSort->iECursor, regBase+nExpr); sqlite3VdbeAddOp3(v, OP_Move, regData, regBase+nExpr+1, nData); sqlite3VdbeAddOp3(v, OP_MakeRecord, regBase+nOBSat, nBase-nOBSat, regRecord); if( nOBSat>0 ){ int regPrevKey; /* The first nOBSat columns of the previous row */ int addrFirst; /* Address of the OP_IfNot opcode */ int addrJmp; /* Address of the OP_Jump opcode */ VdbeOp *pOp; /* Opcode that opens the sorter */ int nKey; /* Number of sorting key columns, including OP_Sequence */ ................................................................................ op = OP_SorterInsert; }else{ op = OP_IdxInsert; } sqlite3VdbeAddOp2(v, op, pSort->iECursor, regRecord); if( nOBSat==0 ){ sqlite3ReleaseTempReg(pParse, regRecord); sqlite3ReleaseTempRange(pParse, regBase, nBase); } if( pSelect->iLimit ){ int addr1, addr2; int iLimit; if( pSelect->iOffset ){ iLimit = pSelect->iOffset+1; }else{ ................................................................................ int addr = sqlite3VdbeCurrentAddr(v) + 4; sqlite3VdbeAddOp4Int(v, OP_Found, iParm+1, addr, r1, 0); VdbeCoverage(v); sqlite3VdbeAddOp2(v, OP_IdxInsert, iParm+1, r1); assert( pSort==0 ); } #endif if( pSort ){ pushOntoSorter(pParse, pSort, p, r1, 1); }else{ int r2 = sqlite3GetTempReg(pParse); sqlite3VdbeAddOp2(v, OP_NewRowid, iParm, r2); sqlite3VdbeAddOp3(v, OP_Insert, iParm, r1, r2); sqlite3VdbeChangeP5(v, OPFLAG_APPEND); sqlite3ReleaseTempReg(pParse, r2); } ................................................................................ pDest->affSdst = sqlite3CompareAffinity(pEList->a[0].pExpr, pDest->affSdst); if( pSort ){ /* At first glance you would think we could optimize out the ** ORDER BY in this case since the order of entries in the set ** does not matter. But there might be a LIMIT clause, in which ** case the order does matter */ pushOntoSorter(pParse, pSort, p, regResult, 1); }else{ int r1 = sqlite3GetTempReg(pParse); sqlite3VdbeAddOp4(v, OP_MakeRecord, regResult,1,r1, &pDest->affSdst, 1); sqlite3ExprCacheAffinityChange(pParse, regResult, 1); sqlite3VdbeAddOp2(v, OP_IdxInsert, iParm, r1); sqlite3ReleaseTempReg(pParse, r1); } ................................................................................ /* If this is a scalar select that is part of an expression, then ** store the results in the appropriate memory cell and break out ** of the scan loop. */ case SRT_Mem: { assert( nResultCol==1 ); if( pSort ){ pushOntoSorter(pParse, pSort, p, regResult, 1); }else{ sqlite3ExprCodeMove(pParse, regResult, iParm, 1); /* The LIMIT clause will jump out of the loop for us */ } break; } #endif /* #ifndef SQLITE_OMIT_SUBQUERY */ case SRT_Coroutine: /* Send data to a co-routine */ case SRT_Output: { /* Return the results */ testcase( eDest==SRT_Coroutine ); testcase( eDest==SRT_Output ); if( pSort ){ pushOntoSorter(pParse, pSort, p, regResult, nResultCol); }else if( eDest==SRT_Coroutine ){ sqlite3VdbeAddOp1(v, OP_Yield, pDest->iSDParm); }else{ sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, nResultCol); sqlite3ExprCacheAffinityChange(pParse, regResult, nResultCol); } break; ................................................................................ int pseudoTab = 0; ExprList *pOrderBy = pSort->pOrderBy; int eDest = pDest->eDest; int iParm = pDest->iSDParm; int regRow; int regRowid; int nKey; int iSortTab; /* Sorter cursor to read from */ int nSortData; /* Trailing values to read from sorter */ u8 p5; /* p5 parameter for 1st OP_Column */ int i; if( pSort->labelBkOut ){ sqlite3VdbeAddOp2(v, OP_Gosub, pSort->regReturn, pSort->labelBkOut); sqlite3VdbeAddOp2(v, OP_Goto, 0, addrBreak); sqlite3VdbeResolveLabel(v, pSort->labelBkOut); addrOnce = sqlite3CodeOnce(pParse); VdbeCoverage(v); } iTab = pSort->iECursor; regRow = sqlite3GetTempReg(pParse); if( eDest==SRT_Output || eDest==SRT_Coroutine ){ pseudoTab = pParse->nTab++; sqlite3VdbeAddOp3(v, OP_OpenPseudo, pseudoTab, regRow, nColumn); regRowid = 0; regRow = pDest->iSdst; nSortData = nColumn; }else{ regRowid = sqlite3GetTempReg(pParse); regRow = sqlite3GetTempReg(pParse); nSortData = 1; } nKey = pOrderBy->nExpr - pSort->nOBSat; if( pSort->sortFlags & SORTFLAG_UseSorter ){ int regSortOut = ++pParse->nMem; iSortTab = pParse->nTab++; sqlite3VdbeAddOp3(v, OP_OpenPseudo, iSortTab, regSortOut, nKey+1+nSortData); if( addrOnce ) sqlite3VdbeJumpHere(v, addrOnce); addr = 1 + sqlite3VdbeAddOp2(v, OP_SorterSort, iTab, addrBreak); VdbeCoverage(v); codeOffset(v, p->iOffset, addrContinue); sqlite3VdbeAddOp2(v, OP_SorterData, iTab, regSortOut); p5 = OPFLAG_CLEARCACHE; }else{ if( addrOnce ) sqlite3VdbeJumpHere(v, addrOnce); addr = 1 + sqlite3VdbeAddOp2(v, OP_Sort, iTab, addrBreak); VdbeCoverage(v); codeOffset(v, p->iOffset, addrContinue); sqlite3VdbeAddOp3(v, OP_Column, iTab, nKey+1, regRow); iSortTab = iTab; p5 = 0; } for(i=0; i<nSortData; i++){ sqlite3VdbeAddOp3(v, OP_Column, iSortTab, nKey+1+i, regRow+i); if( i==0 ) sqlite3VdbeChangeP5(v, p5); } switch( eDest ){ case SRT_Table: case SRT_EphemTab: { testcase( eDest==SRT_Table ); testcase( eDest==SRT_EphemTab ); sqlite3VdbeAddOp2(v, OP_NewRowid, iParm, regRowid); ................................................................................ assert( nColumn==1 ); sqlite3ExprCodeMove(pParse, regRow, iParm, 1); /* The LIMIT clause will terminate the loop for us */ break; } #endif default: { assert( eDest==SRT_Output || eDest==SRT_Coroutine ); testcase( eDest==SRT_Output ); testcase( eDest==SRT_Coroutine ); if( eDest==SRT_Output ){ sqlite3VdbeAddOp2(v, OP_ResultRow, pDest->iSdst, nColumn); sqlite3ExprCacheAffinityChange(pParse, pDest->iSdst, nColumn); }else{ sqlite3VdbeAddOp1(v, OP_Yield, pDest->iSDParm); } break; } } if( regRowid ){ sqlite3ReleaseTempReg(pParse, regRow); sqlite3ReleaseTempReg(pParse, regRowid); } /* The bottom of the loop */ sqlite3VdbeResolveLabel(v, addrContinue); if( pSort->sortFlags & SORTFLAG_UseSorter ){ sqlite3VdbeAddOp2(v, OP_SorterNext, iTab, addr); VdbeCoverage(v); }else{ sqlite3VdbeAddOp2(v, OP_Next, iTab, addr); VdbeCoverage(v); } if( pSort->regReturn ) sqlite3VdbeAddOp1(v, OP_Return, pSort->regReturn); sqlite3VdbeResolveLabel(v, addrBreak); } /* ** Return a pointer to a string containing the 'declaration type' of the ** expression pExpr. The string may be treated as static by the caller. ** ** Also try to estimate the size of the returned value and return that ................................................................................ */ if( sSort.pOrderBy ){ KeyInfo *pKeyInfo; pKeyInfo = keyInfoFromExprList(pParse, sSort.pOrderBy, 0, 0); sSort.iECursor = pParse->nTab++; sSort.addrSortIndex = sqlite3VdbeAddOp4(v, OP_OpenEphemeral, sSort.iECursor, sSort.pOrderBy->nExpr+1+pEList->nExpr, 0, (char*)pKeyInfo, P4_KEYINFO ); }else{ sSort.addrSortIndex = -1; } /* If the output is destined for a temporary table, open that table. */ if( pDest->eDest==SRT_EphemTab ){ |
Changes to test/tester.tcl.
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set G ""
set B ""
set D ""
}
foreach opcode {
Seek SeekGe SeekGt SeekLe SeekLt NotFound Last Rewind
NoConflict Next Prev VNext VPrev VFilter
} {
set color($opcode) $B
}
foreach opcode {ResultRow} {
set color($opcode) $G
}
foreach opcode {IdxInsert Insert Delete IdxDelete} {
................................................................................
if {$opcode == "Goto" && ($bSeenGoto==0 || ($p2 > $addr+10))} {
set linebreak($p2) 1
set bSeenGoto 1
}
if {$opcode=="Next" || $opcode=="Prev"
|| $opcode=="VNext" || $opcode=="VPrev"
} {
for {set i $p2} {$i<$addr} {incr i} {
incr x($i) 2
}
}
if {$opcode == "Goto" && $p2<$addr && $op($p2)=="Yield"} {
|
>
>
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set G ""
set B ""
set D ""
}
foreach opcode {
Seek SeekGe SeekGt SeekLe SeekLt NotFound Last Rewind
NoConflict Next Prev VNext VPrev VFilter
SorterSort SorterNext
} {
set color($opcode) $B
}
foreach opcode {ResultRow} {
set color($opcode) $G
}
foreach opcode {IdxInsert Insert Delete IdxDelete} {
................................................................................
if {$opcode == "Goto" && ($bSeenGoto==0 || ($p2 > $addr+10))} {
set linebreak($p2) 1
set bSeenGoto 1
}
if {$opcode=="Next" || $opcode=="Prev"
|| $opcode=="VNext" || $opcode=="VPrev"
|| $opcode=="SorterNext"
} {
for {set i $p2} {$i<$addr} {incr i} {
incr x($i) 2
}
}
if {$opcode == "Goto" && $p2<$addr && $op($p2)=="Yield"} {
|