| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Huong Dangminh <huo-dangminh(at)ys(dot)jp(dot)nec(dot)com>, Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> |
| Cc: | "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Hiroshi Yanagisawa <hir-yanagisawa(at)ut(dot)jp(dot)nec(dot)com> |
| Subject: | Re: PostgreSQL 10: Segmentation fault when using GROUPING SETS with all unsortable columns |
| Date: | 2018-03-19 22:22:09 |
| Message-ID: | 20180319222209.fbls5xuvcdesanqs@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2018-03-17 23:43:22 +0000, Huong Dangminh wrote:
> Hi,
>
> I have found a case which could get segmentation fault when using GROUPING SETS.
> It occurs when columns in GROUPING SETS are all unsortable but hashable.
>
> Attached grouping_sets_segv.zip include module to reproduce this problem.
>
> I think it made from below change.
>
> https://www.postgresql.org/docs/current/static/release-10.html#id-1.11.6.8.5.3.6
> ---
> Allow hashed aggregation to be used with grouping sets (Andrew Gierth)
> ---
> https://github.com/postgres/postgres/commit/b5635948ab165b6070e7d05d111f966e07570d81
Andrew, any comments?
Regards,
Andres
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