From: Tom Lane <tgl@sss.pgh.pa.us>
To: Simon Riggs <simon@2ndquadrant.com>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: [COMMITTERS] pgsql: Add psql variables showing server version and psql version.
Date: Tue, 05 Sep 2017 14:23:03 -0400
Message-ID: <8505.1504635783@sss.pgh.pa.us> (raw)
In-Reply-To: <7437.1504634344@sss.pgh.pa.us>
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I wrote:
> Huh? The variable will be set in any case. It should be correct for any
> server version we might find in the wild --- so far as I can tell from the
> commit history, every version supporting FE/BE protocol version 3 has sent
> server_version at connection start. With a pre-7.4 server, it looks like
> the variables would be set to "0.0.0" and "0" respectively.
Scratch that: experimentation says it works fine with older servers too.
The oldest one I have in captivity reports
SERVER_VERSION_NAME = '7.0.3'
SERVER_VERSION_NUM = '70003'
Looking more closely, I see that when using protocol version 2, libpq
will issue a "select version()" command at connection start to get
this info.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, simon@2ndquadrant.com, robertmhaas@gmail.com
Subject: Re: [COMMITTERS] pgsql: Add psql variables showing server version and psql version.
In-Reply-To: <8505.1504635783@sss.pgh.pa.us>
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