diff options
Diffstat (limited to 'ext/misc/fuzzer.c')
| -rw-r--r-- | ext/misc/fuzzer.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/ext/misc/fuzzer.c b/ext/misc/fuzzer.c index 642b8f9..fe41cda 100644 --- a/ext/misc/fuzzer.c +++ b/ext/misc/fuzzer.c @@ -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 = 1e12; + 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 /= 1e6; } 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 = 1e99; + pIdxInfo->estimatedCost = rCost; return SQLITE_OK; } |