Re: Consistent segfault in complex query

>>>>> "Tom" == Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:

>> There's a relevant commit from Feb this year (ea6d67cf8)
>> specifically referring to the case of CTEs inside subplans inside
>> EvalPlanQual, which is exactly the scenario you have in your query.
>> So you need to try this in 9.3.22 or later (ideally 9.3.24, the
>> latest) which contain this fix.

Tom> I'm not entirely convinced that that fix will cure this, but
Tom> certainly it seems related, and we should find out whether it has
Tom> any effect.

I agree.

Tom> The reason this seems possibly different is that we're apparently
Tom> returning wrong data out of the sub-select (a zero Datum value,
Tom> but not marked isnull --- if it were, arraycontains wouldn't be
Tom> reached). The previously fixed bug would have caused either
Tom> multiple or missed returns of a valid CTE tuple.

I have some ideas as to why, and I'm poking at them in order to create a
test case (no luck yet, but I'll keep at it).

--
Andrew (irc:RhodiumToad)