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From: Andreas Seltenreich <andreas.seltenreich@credativ.de>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: obeltrame@callixbrasil.com,  pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #15053: SIGSEGV - While executing query with cube agregator
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Date: Tue, 06 Feb 2018 23:00:47 +0100
In-Reply-To: <23669.1517944780@sss.pgh.pa.us> (Tom Lane's message of "Tue, 06
	Feb 2018 14:19:40 -0500")
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Tom Lane writes:
> =?utf-8?q?PG_Bug_reporting_form?= <noreply@postgresql.org> writes:
>> the following postgres crash was generated during the execution of this
>> query:
[...]
>> group by cube
>
> Hmm, well, first please update to something newer than 9.6.3, to see if
> the problem is already resolved.  (9.6.7 is being released this week.)

backtrace and query look similar to the issue we reported leading to the
following commitfest entry:

    https://commitfest.postgresql.org/16/1413/

Our customer hasn't seen any crashes with cube() statements since
setting

    replacement_sort_tuples = 0

I'm afraid this workaround might be needed here as well unless a fix
makes it into 9.6.7.

regards,
Andreas