Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hdk2c-0005Jh-05 for pgsql-hackers@arkaria.postgresql.org; Wed, 19 Jun 2019 23:30:58 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.89) (envelope-from ) id 1hdk2a-000307-K1 for pgsql-hackers@arkaria.postgresql.org; Wed, 19 Jun 2019 23:30:56 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hdk2a-0002yC-6P for pgsql-hackers@lists.postgresql.org; Wed, 19 Jun 2019 23:30:56 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by makus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hdk2X-00028r-T1 for pgsql-hackers@postgresql.org; Wed, 19 Jun 2019 23:30:55 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id x5JNUiSp029833; Wed, 19 Jun 2019 19:30:44 -0400 From: Tom Lane To: Andrew Gierth cc: Robert Haas , Stephen Frost , Andres Freund , Christoph Berg , PostgreSQL Hackers Subject: Re: UCT (Re: pgsql: Update time zone data files to tzdata release 2019a.) 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> <25314.1560980148@sss.pgh.pa.us> <27991.1560984458@sss.pgh.pa.us> Comments: In-reply-to Tom Lane message dated "Wed, 19 Jun 2019 18:47:38 -0400" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <29831.1560987044.1@sss.pgh.pa.us> Date: Wed, 19 Jun 2019 19:30:44 -0400 Message-ID: <29832.1560987044@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk 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