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Do not use a partial index as a table scan in an IN operator.

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Fix for ticket [1d958d90596593a77420e59].

FossilOrigin-Name: 15bc915dd7ae25bfdfbe357c3792db3639799e4d121c6b5b24297af2d6d7129e
This commit is contained in:
drh
2018-12-08 20:30:31 +00:00
parent 83da91b7bd
commit d4a4a36171
4 changed files with 27 additions and 9 deletions
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src/expr.c
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@@ -2443,6 +2443,7 @@ int sqlite3FindInIndex(
Bitmask colUsed; /* Columns of the index used */
Bitmask mCol; /* Mask for the current column */
if( pIdx->nColumn<nExpr ) continue;
if( pIdx->pPartIdxWhere!=0 ) continue;
/* Maximum nColumn is BMS-2, not BMS-1, so that we can compute
** BITMASK(nExpr) without overflowing */
testcase( pIdx->nColumn==BMS-2 );