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Add a test-control to disable the skip-scan optimization.

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FossilOrigin-Name: 650a3fe03d61068e06f3097878a777ca8ed713a769444cdb3f8be7d1e19a0b83
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dan
2018-07-12 19:14:39 +00:00
parent 7490128240
commit e882551935
6 changed files with 21 additions and 10 deletions
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src/where.c
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@@ -2672,6 +2672,7 @@ static int whereLoopAddBtreeIndex(
if( saved_nEq==saved_nSkip
&& saved_nEq+1<pProbe->nKeyCol
&& pProbe->noSkipScan==0
&& OptimizationEnabled(db, SQLITE_SkipScan)
&& pProbe->aiRowLogEst[saved_nEq+1]>=42 /* TUNING: Minimum for skip-scan */
&& (rc = whereLoopResize(db, pNew, pNew->nLTerm+1))==SQLITE_OK
){