Re: UCT (Re: pgsql: Update time zone data files to tzdata release 2019a.)

Christoph Berg <myon@debian.org> writes:
> Re: Tom Lane 2019-06-11 <24452.1560285699@sss.pgh.pa.us>
>> The only way I can get it to pick "Etc/UCT" is if that's what I put
>> into /etc/localtime.  (In which case I maintain that that's not a bug,
>> or at least not our bug.)

> Did you try a symlink or a plain file for /etc/localtime?

Symlink --- if it's a plain file, our code can't learn anything from it.

> On Debian unstable, deleting /etc/timezone, $TZ not set, and with this symlink:
> lrwxrwxrwx 1 root root 27 Mär 28 14:49 /etc/localtime -> /usr/share/zoneinfo/Etc/UTC

> /usr/lib/postgresql/11/bin/initdb -D pgdata
> $ grep timezone pgdata/postgresql.conf
> log_timezone = 'UCT'
> timezone = 'UCT'

> /usr/lib/postgresql/12/bin/initdb -D pgdata
> $ grep timezone pgdata/postgresql.conf
> log_timezone = 'Etc/UTC'
> timezone = 'Etc/UTC'

That's what I'd expect.  Do you think your upthread report of HEAD
picking "Etc/UCT" was a typo?  Or maybe you actually had /etc/localtime
set that way?

>> Anyway, moving on to the question of what should we do about this,
>> I don't really have anything better to offer than back-patching 23bd3cec6.

> The PG12 behavior seems sane, so +1.

OK, I'll make that happen.

            regards, tom lane