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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Thomas Munro <thomas.munro@gmail.com>
Cc: Tomas Vondra <tomas.vondra@enterprisedb.com>
Cc: Vik Fearing <vik@postgresfriends.org>
Cc: Georgios Kokolatos <gkokolatos@protonmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Cc: Erik Rijkers <er@xs4all.nl>
Subject: Re: GROUP BY DISTINCT
Date: Thu, 18 Mar 2021 18:35:42 -0400
Message-ID: <3818384.1616106942@sss.pgh.pa.us> (raw)
In-Reply-To: <CA+hUKG+6mHO82VCp9TYLcwf_x8qjd-jrxLnYCTpZOebmnrLzww@mail.gmail.com>
References: <bf3805a8-d7d1-ae61-fece-761b7ff41ecc@postgresfriends.org>
	<c350ff6b-d70d-9952-be23-a18855b62589@postgresfriends.org>
	<161469758801.29967.4455067072614569957.pgcf@coridan.postgresql.org>
	<4294e82f-a134-5dbb-d9d6-03d72dce2e1e@postgresfriends.org>
	<b95ee556-c527-04b8-6cae-f55950dde94b@enterprisedb.com>
	<3817d5ec-f3e4-e4b9-d169-271ae5d3cbe4@postgresfriends.org>
	<8c44df08-bb64-3d78-da1a-d24b7c9db39d@enterprisedb.com>
	<7137947a-87be-d04a-bf91-f42e47520daa@enterprisedb.com>
	<35077b31-2d62-1e31-0e2e-ddb52d590b73@enterprisedb.com>
	<CA+hUKG+rJkXWjj_WFPE8cDp+9Av2T3bQfEfEBd=W+PdWVCk8mg@mail.gmail.com>
	<aa87b9b9-6a14-a84a-574f-e3ad2ce2504c@enterprisedb.com>
	<CA+hUKG+6mHO82VCp9TYLcwf_x8qjd-jrxLnYCTpZOebmnrLzww@mail.gmail.com>

Thomas Munro <thomas.munro@gmail.com> writes:
> On Fri, Mar 19, 2021 at 10:14 AM Tomas Vondra
> <tomas.vondra@enterprisedb.com> wrote:
>> Thanks for the info. So it's likely related to older gcc releases. The
>> question is how to tweak the code to get rid of this ...

> It's frustrating to have to do press-ups to fix a problem because a
> zombie Debian 7 system is running with -Werror (though it's always
> possible that it's telling us something interesting...).  Anyway, I
> think someone with a GCC < 4.8 compiler would have to investigate.  I
> was hoping to help, but none of my systems have one in easy-to-install
> format...

Hmm ... prairiedog isn't showing the warning, but maybe gaur will.
I can take a look if nobody else is stepping up.

			regards, tom lane





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