From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> |
Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: [COMMITTERS] pgsql: Add psql variables showing server version and psql version. |
Date: | 2017-09-06 18:37:30 |
Message-ID: | 31190.1504723050@sss.pgh.pa.us |
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Lists: | pgsql-committers pgsql-hackers |
Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> writes:
> Thus short, simple but meaningful examples which show how to do something
> useful with all that in the documentation may help people take advantage
> of these new features.
I don't have an objection to providing an example. I wasn't terribly
impressed with Simon's version, but maybe we can do better. I think
it should be concrete, not partly abstract; and likely it needs to be
with \if not the variable proper.
> Given my experience with "\d*", I'm not sure I would assume that a new
> psql feature would work with older servers.
I don't recall anyone questioning whether PQserverVersion() would work
with older servers. Being able to tell what version the server is is
sort of the point, no? If there were a restriction on what it would
work with, I would agree that that needs to be documented. But I
don't think "yes, it really works" is a helpful use of documentation
space.
regards, tom lane
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