From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Andrew Gierth <andrew@tao11.riddles.org.uk>
Cc: Christoph Berg <myon@debian.org>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Subject: Re: UCT (Re: pgsql: Update time zone data files to tzdata release 2019a.)
Date: Thu, 06 Jun 2019 13:44:54 -0400
Message-ID: <5661.1559843094@sss.pgh.pa.us> (raw)
In-Reply-To: <20190606171850.ilssehzrvrrfuiqs@alap3.anarazel.de>
References: <E1hK8qL-0005yH-VX@gemulon.postgresql.org>
<20190604085735.GD24018@msg.df7cb.de>
<87ftop8gtr.fsf@news-spur.riddles.org.uk>
<20190604164457.772invck3lgxk75s@alap3.anarazel.de>
<5519.1559839890@sss.pgh.pa.us>
<20190606171850.ilssehzrvrrfuiqs@alap3.anarazel.de>
Andres Freund <andres@anarazel.de> writes:
> On 2019-06-06 12:51:30 -0400, Tom Lane wrote:
>> Sure, that is intentionally a behavior change in this situation.
>> The theory is that if "Etc/UCT" is what the user put in /etc/localtime,
>> then that's the spelling she wants. See 23bd3cec6.
> Right, I'm not complaining about that. I'm just noting that that
> explains the cross-version divergence.
It explains some cross-version divergence for sure. What I'm still not
clear about is whether Christoph's report is entirely that, or whether
there's some additional factor we don't understand yet.
> As you can see the switch from Etc/UTC to UCT does happen here
> (presumably in any branch before 12). Which did not happen before the
> import of 2019a / when using a system tzdata that's before
> that.
Right. Before 2019a, UCT would not have been a match to a system
setting of UTC because the zone abbreviation reported by localtime()
was different. Now it's the same abbreviation.
Maybe we should consider back-patching 23bd3cec6.
regards, tom lane
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To: pgsql-committers@postgresql.org
Cc: tgl@sss.pgh.pa.us, andres@anarazel.de, andrew@tao11.riddles.org.uk, myon@debian.org, pgsql-hackers@postgresql.org
Subject: Re: UCT (Re: pgsql: Update time zone data files to tzdata release 2019a.)
In-Reply-To: <5661.1559843094@sss.pgh.pa.us>
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