From: Tom Lane <tgl@sss.pgh.pa.us>
To: pgsql-hackers@lists.postgresql.org
Subject: postgres_fdw fails because GMT != UTC
Date: Thu, 04 Apr 2024 02:19:45 -0400
Message-ID: <465248.1712211585@sss.pgh.pa.us> (raw)
Over at [1] we have a complaint of postgres_fdw failing with
a remote-server error
> ERROR: invalid value for parameter "TimeZone": "UTC"
I am not quite clear on how broken an installation needs to be to
reject "UTC" as a time zone setting, except that the breakage cannot
be subtle. However, I notice that our code in pgtz.c and other
places treats "GMT" as a hard-wired special case ... but not "UTC".
I wonder if we ought to modify those places to force "UTC" down the
same hard-wired paths. If we acted like that, this would have worked
no matter how misconfigured the installation was.
An alternative answer could be to change postgres_fdw to send "GMT"
not "UTC". That's ugly from a standards-compliance viewpoint, but
it would fix this problem even with a non-updated remote server,
and I think postgres_fdw is generally intended to work with even
very old remote servers.
Or we could do both.
Thoughts?
regards, tom lane
[1] https://www.postgresql.org/message-id/flat/5DF49366-10D1-42A4-99BF-F9A7DC3AB0F4%40mailbox.org
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, pgsql-hackers@lists.postgresql.org
Subject: Re: postgres_fdw fails because GMT != UTC
In-Reply-To: <465248.1712211585@sss.pgh.pa.us>
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