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Overview
Comment: | Rearrange the order of some checks in the integrity_check pragma for a very slight performance gain. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA3-256: |
4b853f020570bf4af1b14e03f35764c7 |
User & Date: | drh 2018-06-06 19:48:19.360 |
Context
2018-06-06
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20:29 | Small performance optimization in sqlite3VdbeRecordCompareWithSkip() for the common case where the comparison is equal. (check-in: 1e616e256a user: drh tags: trunk) | |
19:48 | Rearrange the order of some checks in the integrity_check pragma for a very slight performance gain. (check-in: 4b853f0205 user: drh tags: trunk) | |
18:50 | Fix the sqlite3BeginTrans() calls within the snapshot extension. (check-in: 1fef7ad25b user: drh tags: trunk) | |
Changes
Changes to src/pragma.c.
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1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 | for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){ sqlite3VdbeAddOp2(v, OP_Integer, 0, 8+j); /* index entries counter */ } assert( pParse->nMem>=8+j ); assert( sqlite3NoTempsInRange(pParse,1,7+j) ); sqlite3VdbeAddOp2(v, OP_Rewind, iDataCur, 0); VdbeCoverage(v); loopTop = sqlite3VdbeAddOp2(v, OP_AddImm, 7, 1); /* Verify that all NOT NULL columns really are NOT NULL */ for(j=0; j<pTab->nCol; j++){ char *zErr; int jmp2; if( j==pTab->iPKey ) continue; if( pTab->aCol[j].notNull==0 ) continue; sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, j, 3); | > > > > > | 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 | for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){ sqlite3VdbeAddOp2(v, OP_Integer, 0, 8+j); /* index entries counter */ } assert( pParse->nMem>=8+j ); assert( sqlite3NoTempsInRange(pParse,1,7+j) ); sqlite3VdbeAddOp2(v, OP_Rewind, iDataCur, 0); VdbeCoverage(v); loopTop = sqlite3VdbeAddOp2(v, OP_AddImm, 7, 1); if( !isQuick ){ /* Sanity check on record header decoding */ sqlite3VdbeAddOp3(v, OP_Column, iDataCur, pTab->nCol-1, 3); sqlite3VdbeChangeP5(v, OPFLAG_TYPEOFARG); } /* Verify that all NOT NULL columns really are NOT NULL */ for(j=0; j<pTab->nCol; j++){ char *zErr; int jmp2; if( j==pTab->iPKey ) continue; if( pTab->aCol[j].notNull==0 ) continue; sqlite3ExprCodeGetColumnOfTable(v, pTab, iDataCur, j, 3); |
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1602 1603 1604 1605 1606 1607 1608 | integrityCheckResultRow(v); sqlite3VdbeResolveLabel(v, addrCkOk); sqlite3ExprCachePop(pParse); } sqlite3ExprListDelete(db, pCheck); } if( !isQuick ){ /* Omit the remaining tests for quick_check */ | < < < | 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 | integrityCheckResultRow(v); sqlite3VdbeResolveLabel(v, addrCkOk); sqlite3ExprCachePop(pParse); } sqlite3ExprListDelete(db, pCheck); } if( !isQuick ){ /* Omit the remaining tests for quick_check */ /* Validate index entries for the current row */ for(j=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, j++){ int jmp2, jmp3, jmp4, jmp5; int ckUniq = sqlite3VdbeMakeLabel(v); if( pPk==pIdx ) continue; r1 = sqlite3GenerateIndexKey(pParse, pIdx, iDataCur, 0, 0, &jmp3, pPrior, r1); |
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