| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | Andreas Seltenreich <seltenreich(at)gmx(dot)de> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [sqlsmith] Failed assertion in parallel worker in ExecInitSubPlan |
| Date: | 2016-11-25 04:38:45 |
| Message-ID: | CAA4eK1+op4QY_N+bQg1+KxH8rMuohSKg3ogXDyHHbf66qZV9GA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Nov 25, 2016 at 3:26 AM, Andreas Seltenreich <seltenreich(at)gmx(dot)de> wrote:
> Hi,
>
> just caught another InitPlan below Gather with the recent patches in
> (master as of 4cc6a3f). Recipe below.
>
I think this problem exists since commit
110a6dbdebebac9401b43a8fc223e6ec43cd4d10 where we have allowed
subqueries to be pushed to parallel workers. I think we should
consider rel (where rtekind is RTE_SUBQUERY) to be parallel safe if
the subquery is also parallel safe. Attached patch does that and
fixes the reported problem for me.
--
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com
| Attachment | Content-Type | Size |
|---|---|---|
| allow_safe_subquery_parallel_worker_v1.patch | application/octet-stream | 1.5 KB |
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