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Overview
| Comment: | Set the WHERE_UNIQUE flag on loops that can only run once. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | nextgen-query-plan-exp |
| Files: | files | file ages | folders |
| SHA1: |
510f4d8ecf6eb284f14b91951e723650 |
| User & Date: | drh 2013-06-03 15:07:23 |
Context
|
2013-06-03
| ||
| 15:24 | Virtual tables now always report 25 rows instead of 0 rows in the EXPLAIN QUERY PLAN output. Adjust tests accordingly. check-in: 7d91f688 user: drh tags: nextgen-query-plan-exp | |
| 15:07 | Set the WHERE_UNIQUE flag on loops that can only run once. check-in: 510f4d8e user: drh tags: nextgen-query-plan-exp | |
| 14:15 | Add test cases to verify that ticket [bc1aea7b725f2761] has been fixed in the NGQP. check-in: 9b97af94 user: drh tags: nextgen-query-plan-exp | |
Changes
Changes to src/where.c.
4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 |
/* "x IN (value, value, ...)" */
nIn = pExpr->x.pList->nExpr;
}
pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul * nIn;
}else if( pTerm->eOperator & (WO_EQ) ){
pNew->wsFlags |= WHERE_COLUMN_EQ;
pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul;
}else if( pTerm->eOperator & (WO_ISNULL) ){
pNew->wsFlags |= WHERE_COLUMN_NULL;
pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul;
}else if( pTerm->eOperator & (WO_GT|WO_GE) ){
|
> > > > > > |
4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 |
/* "x IN (value, value, ...)" */
nIn = pExpr->x.pList->nExpr;
}
pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul * nIn;
}else if( pTerm->eOperator & (WO_EQ) ){
pNew->wsFlags |= WHERE_COLUMN_EQ;
if( iCol<0
|| (pProbe->onError==OE_Abort && nInMul==1
&& pNew->u.btree.nEq==pProbe->nColumn-1)
){
pNew->wsFlags |= WHERE_UNIQUE;
}
pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul;
}else if( pTerm->eOperator & (WO_ISNULL) ){
pNew->wsFlags |= WHERE_COLUMN_NULL;
pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul;
}else if( pTerm->eOperator & (WO_GT|WO_GE) ){
|