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Overview
| Comment: | Fix the wholenumber virtual table so that it returns higher costs for unconstrained usage. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | nextgen-query-plan-exp |
| Files: | files | file ages | folders |
| SHA1: |
ceff8955020cd1314bf1ab0af7d075fe |
| User & Date: | drh 2013-05-08 14:13:51 |
References
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2013-05-08
| ||
| 14:20 | Fix the wholenumber virtual table so that it returns higher costs for unconstrained usage. Cherrypick from [ceff8955020cd13]. (check-in: 7227b615 user: drh tags: trunk) | |
Context
|
2013-05-08
| ||
| 14:20 | Fix the wholenumber virtual table so that it returns higher costs for unconstrained usage. Cherrypick from [ceff8955020cd13]. (check-in: 7227b615 user: drh tags: trunk) | |
| 14:14 | NGQP working with virtual tables, though many legacy tests fail and there are yet some memory leaks. (check-in: bd9327a9 user: drh tags: nextgen-query-plan-exp) | |
| 14:13 | Fix the wholenumber virtual table so that it returns higher costs for unconstrained usage. (check-in: ceff8955 user: drh tags: nextgen-query-plan-exp) | |
| 04:22 | More bug fixes to the WhereLoop generator and the solver in NGQP. Now finds the best plan for TPC-H Q8. This seems to prove the concept, but there is still much work to be done. (check-in: 8e5aad37 user: drh tags: nextgen-query-plan-exp) | |
Changes
Changes to ext/misc/wholenumber.c.
214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 |
pIdxInfo->aConstraintUsage[gtIdx].omit = 1;
}
if( pIdxInfo->nOrderBy==1
&& pIdxInfo->aOrderBy[0].desc==0
){
pIdxInfo->orderByConsumed = 1;
}
pIdxInfo->estimatedCost = (double)1;
return SQLITE_OK;
}
/*
** A virtual table module that provides read-only access to a
** Tcl global variable namespace.
*/
|
> > > > > | > |
214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 |
pIdxInfo->aConstraintUsage[gtIdx].omit = 1;
}
if( pIdxInfo->nOrderBy==1
&& pIdxInfo->aOrderBy[0].desc==0
){
pIdxInfo->orderByConsumed = 1;
}
if( (idxNum & 12)==0 ){
pIdxInfo->estimatedCost = (double)100000000;
}else if( (idxNum & 3)==0 ){
pIdxInfo->estimatedCost = (double)5;
}else{
pIdxInfo->estimatedCost = (double)1;
}
return SQLITE_OK;
}
/*
** A virtual table module that provides read-only access to a
** Tcl global variable namespace.
*/
|