On Sat, Jan 12, 2019 at 8:52 PM David Rowley
<david.row...@2ndquadrant.com> wrote:
>
> Basically, the planner assumes that the WHERE a IS NOT NULL index
> implies WHERE b IN(1,...,101), which is definitely not the case.
>
> Probably your new code needs to be expanded to become:
>
> if (IsA(clause, ScalarArrayOpExpr))
> {
> ScalarArrayOpExpr *saop = (ScalarArrayOpExpr *) clause;
> if (op_strict(saop->opno) &&
> clause_is_strict_for((Node *) linitial(saop->args), subexpr))
> return true;
> }I've updated the code as well as included the sad path test in addition to my original happy path test. Patch v3 attached. James Coleman
saop_is_not_null-v3.patch
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