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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Chao Li <li.evan.chao@gmail.com>
cc: Peter Eisentraut <peter@eisentraut.org>,
        David Christensen <david@pgguru.net>,
        Andrey Borodin <x4mmm@yandex-team.ru>,
        pgsql-hackers <pgsql-hackers@postgresql.org>,
        "David G. Johnston" <david.g.johnston@gmail.com>,
        Jelte Fennema-Nio <postgres@jeltef.nl>
Subject: Re: [PATCH] GROUP BY ALL
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 <B2FFB2B2-2FBD-4B1E-90EF-311ABC7A2776@gmail.com>
Comments: In-reply-to Chao Li <li.evan.chao@gmail.com>
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Chao Li <li.evan.chao@gmail.com> writes:
> Do we want to specifically check “ctid”?

No.  Complete waste of effort.

			regards, tom lane