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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andrew Gierth <andrew@tao11.riddles.org.uk>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Stephen Frost <sfrost@snowman.net>
Cc: Andres Freund <andres@anarazel.de>
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: Wed, 19 Jun 2019 19:30:44 -0400
Message-ID: <29832.1560987044@sss.pgh.pa.us> (raw)
In-Reply-To: <27991.1560984458@sss.pgh.pa.us>
References: <24452.1560285699@sss.pgh.pa.us>
	<20190614095546.GA15107@msg.df7cb.de>
	<26948.1560517875@sss.pgh.pa.us>
	<87ef3w3u8a.fsf@news-spur.riddles.org.uk>
	<7114.1560539536@sss.pgh.pa.us>
	<875zp74zpf.fsf@news-spur.riddles.org.uk>
	<871rzv4yes.fsf@news-spur.riddles.org.uk>
	<20190617173943.z3ttxqenbcwrlag4@alap3.anarazel.de>
	<20190617183458.GG2480@tamriel.snowman.net>
	<20190617183828.hj7ci362zbxd4nax@alap3.anarazel.de>
	<20190617184053.GI2480@tamriel.snowman.net>
	<CA+TgmoYF00U3Pbkh4mXhXr1NN6pKFM278KmXRS35HDuHgNcMFw@mail.gmail.com>
	<25314.1560980148@sss.pgh.pa.us>
	<27991.1560984458@sss.pgh.pa.us>

I wrote:
> So I'm toying with the idea of extending Andrew's patch to put a negative
> preference on "localtime", ensuring we'll use some other name for the zone
> if one is available.

Oh ... after further review it seems like "posixrules" should be
de-preferred on the same basis: it's uninformative and unportable,
and it's short enough to have a good chance of capturing initdb's
attention.  I recall having seen at least one machine picking it
recently.

Moreover, while I think most tzdb installations have that file (ours
certainly do), the handwriting is on the wall for it to go away,
leaving only postmaster startup failures behind:

http://mm.icann.org/pipermail/tz/2019-June/028172.html

			regards, tom lane





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