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Overview
| Comment: | Better determination of when an index is UNIQUE. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | nextgen-query-plan-exp |
| Files: | files | file ages | folders |
| SHA1: |
63fd025ad98c33826342824c51436ac9 |
| User & Date: | drh 2013-06-04 13:37:26 |
Context
|
2013-06-04
| ||
| 15:31 | Test case updates. (check-in: 0360fec7 user: drh tags: nextgen-query-plan-exp) | |
| 13:37 | Better determination of when an index is UNIQUE. (check-in: 63fd025a user: drh tags: nextgen-query-plan-exp) | |
| 13:07 | Increase the estimated full-scan cost for an FTS3 table. (check-in: 8d9f29f8 user: drh tags: nextgen-query-plan-exp) | |
Changes
Changes to src/where.c.
4020 4020 pNew->u.btree.nEq++; 4021 4021 pNew->nOut = (double)iRowEst * nInMul * nIn; 4022 4022 }else if( pTerm->eOperator & (WO_EQ) ){ 4023 4023 assert( (pNew->wsFlags & (WHERE_COLUMN_NULL|WHERE_COLUMN_IN))!=0 4024 4024 || nInMul==1 ); 4025 4025 pNew->wsFlags |= WHERE_COLUMN_EQ; 4026 4026 if( iCol<0 4027 - || (pProbe->onError==OE_Abort && nInMul==1 4027 + || (pProbe->onError!=OE_None && nInMul==1 4028 4028 && pNew->u.btree.nEq==pProbe->nColumn-1) 4029 4029 ){ 4030 4030 testcase( pNew->wsFlags & WHERE_COLUMN_IN ); 4031 4031 pNew->wsFlags |= WHERE_ONEROW; 4032 4032 } 4033 4033 pNew->u.btree.nEq++; 4034 4034 pNew->nOut = (double)iRowEst * nInMul; ................................................................................ 4717 4717 rev = revIdx ^ pOrderBy->a[i].sortOrder; 4718 4718 if( rev ) *pRevMask |= MASKBIT(iLoop); 4719 4719 revSet = 1; 4720 4720 } 4721 4721 } 4722 4722 }else{ 4723 4723 /* No match found */ 4724 - if( j<nColumn || pIndex==0 || pIndex->onError!=OE_Abort ){ 4724 + if( j<nColumn || pIndex==0 || pIndex->onError==OE_None ){ 4725 4725 isWellOrdered = 0; 4726 4726 } 4727 4727 break; 4728 4728 } 4729 4729 } /* end Loop over all index columns */ 4730 4730 } /* end-if not one-row */ 4731 4731