Re: BUG #11811: Server segfault with many subpartitions when using nestloop

From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: federico(at)brandwatch(dot)com, pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #11811: Server segfault with many subpartitions when using nestloop
Date: 2014-10-29 02:35:15
Message-ID: CAB7nPqTwVOOLFw0EEJeK8Lb65nd-xzcB-=WM5NO-6Ng=+cOj1Q@mail.gmail.com
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On Wed, Oct 29, 2014 at 3:00 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> federico(at)brandwatch(dot)com writes:
>> We noticed a server crash with SEGFAULT after the upgrade to 9.2.9 with the
>> queries involving a large number of sub partitions.
>
> Hm. The given test case works fine for me in 9.2 branch tip. I wonder
> whether commit 71b88cf52e3baccf6be77709fece5837ef04ea20 fixed it.
Some bisecting later... Yes that's fixed with 71b88cf. This fix will
show up in the next minor releases 9.2.10, 9.3.6 etc. You came up with
a test case more simple than the bug report at the origin of 71b88cf,
still involving grand-child relations though.
--
Michael

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