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When we play games with COLLATE in order to commute an operator in the

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WHERE clause processing, be sure not to use the commuted operator to qualify
a partial index, as insufficient COLLATE information is preserved to verify
that the expression will correctly qualify the index.
Ticket [767a8cbc6d20bd68]

FossilOrigin-Name: 5351e920f489562f959ab8a376ff720f845ea165e0cdc7c3a271aac53c2aa64a
This commit is contained in:
drh
2019-09-03 14:27:25 +00:00
parent 4fc836546e
commit c7d12f4ad4
6 changed files with 43 additions and 13 deletions
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4
src/where.c
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@@ -2800,7 +2800,9 @@ static int whereUsablePartialIndex(int iTab, WhereClause *pWC, Expr *pWhere){
}
if( pParse->db->flags & SQLITE_EnableQPSG ) pParse = 0;
for(i=0, pTerm=pWC->a; i<pWC->nTerm; i++, pTerm++){
Expr *pExpr = pTerm->pExpr;
Expr *pExpr;
if( pTerm->wtFlags & TERM_NOPARTIDX ) continue;
pExpr = pTerm->pExpr;
if( (!ExprHasProperty(pExpr, EP_FromJoin) || pExpr->iRightJoinTable==iTab)
&& sqlite3ExprImpliesExpr(pParse, pExpr, pWhere, iTab)
){