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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
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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.
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pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul * nIn;
}else if( pTerm->eOperator & (WO_EQ) ){
assert( (pNew->wsFlags & (WHERE_COLUMN_NULL|WHERE_COLUMN_IN))!=0
|| nInMul==1 );
pNew->wsFlags |= WHERE_COLUMN_EQ;
if( iCol<0
|| (pProbe->onError==OE_Abort && nInMul==1
&& pNew->u.btree.nEq==pProbe->nColumn-1)
){
testcase( pNew->wsFlags & WHERE_COLUMN_IN );
pNew->wsFlags |= WHERE_ONEROW;
}
pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul;
................................................................................
rev = revIdx ^ pOrderBy->a[i].sortOrder;
if( rev ) *pRevMask |= MASKBIT(iLoop);
revSet = 1;
}
}
}else{
/* No match found */
if( j<nColumn || pIndex==0 || pIndex->onError!=OE_Abort ){
isWellOrdered = 0;
}
break;
}
} /* end Loop over all index columns */
} /* end-if not one-row */
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pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul * nIn;
}else if( pTerm->eOperator & (WO_EQ) ){
assert( (pNew->wsFlags & (WHERE_COLUMN_NULL|WHERE_COLUMN_IN))!=0
|| nInMul==1 );
pNew->wsFlags |= WHERE_COLUMN_EQ;
if( iCol<0
|| (pProbe->onError!=OE_None && nInMul==1
&& pNew->u.btree.nEq==pProbe->nColumn-1)
){
testcase( pNew->wsFlags & WHERE_COLUMN_IN );
pNew->wsFlags |= WHERE_ONEROW;
}
pNew->u.btree.nEq++;
pNew->nOut = (double)iRowEst * nInMul;
................................................................................
rev = revIdx ^ pOrderBy->a[i].sortOrder;
if( rev ) *pRevMask |= MASKBIT(iLoop);
revSet = 1;
}
}
}else{
/* No match found */
if( j<nColumn || pIndex==0 || pIndex->onError==OE_None ){
isWellOrdered = 0;
}
break;
}
} /* end Loop over all index columns */
} /* end-if not one-row */
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