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Adjust the xBestIndex methods on both the fuzzer and transitive_closure

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virtual tables so that an unused MATCH operator gets a really large cost.
Remove ambiguities from the fuzzer test cases.

FossilOrigin-Name: e2c1af78b65a8ace976fa6c035db212e1ffc79b8
This commit is contained in:
drh
2013-06-03 21:25:28 +00:00
parent 45c154ac90
commit a3855653ed
5 changed files with 38 additions and 16 deletions
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13
ext/misc/fuzzer.c
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@ -1077,9 +1077,16 @@ static int fuzzerBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
int iDistTerm = -1;
int iRulesetTerm = -1;
int i;
int seenMatch = 0;
const struct sqlite3_index_constraint *pConstraint;
double rCost = 100000;
pConstraint = pIdxInfo->aConstraint;
for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
if( pConstraint->iColumn==0
&& pConstraint->op==SQLITE_INDEX_CONSTRAINT_MATCH ){
seenMatch = 1;
}
if( pConstraint->usable==0 ) continue;
if( (iPlan & 1)==0
&& pConstraint->iColumn==0
@ -1088,6 +1095,7 @@ static int fuzzerBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
iPlan |= 1;
pIdxInfo->aConstraintUsage[i].argvIndex = 1;
pIdxInfo->aConstraintUsage[i].omit = 1;
rCost /= 1000000.0;
}
if( (iPlan & 2)==0
&& pConstraint->iColumn==1
@ -1096,6 +1104,7 @@ static int fuzzerBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
){
iPlan |= 2;
iDistTerm = i;
rCost /= 10.0;
}
if( (iPlan & 4)==0
&& pConstraint->iColumn==2
@ -1104,6 +1113,7 @@ static int fuzzerBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
iPlan |= 4;
pIdxInfo->aConstraintUsage[i].omit = 1;
iRulesetTerm = i;
rCost /= 10.0;
}
}
if( iPlan & 2 ){
@ -1122,7 +1132,8 @@ static int fuzzerBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
){
pIdxInfo->orderByConsumed = 1;
}
pIdxInfo->estimatedCost = (double)10000;
if( seenMatch && (iPlan&1)==0 ) rCost *= 1e30;
pIdxInfo->estimatedCost = rCost;
return SQLITE_OK;
}