| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> |
| Cc: | Christoph Berg <myon(at)debian(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: UCT (Re: pgsql: Update time zone data files to tzdata release 2019a.) |
| Date: | 2019-06-04 16:44:57 |
| Message-ID: | 20190604164457.772invck3lgxk75s@alap3.anarazel.de |
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| Lists: | pgsql-committers pgsql-hackers |
Hi,
On 2019-06-04 17:20:42 +0100, Andrew Gierth wrote:
> fwiw on FreeBSD with no /etc/localtime and no TZ in the environment (and
> hence running on UTC), I get "UCT" on both 11.3 and HEAD.
That makes sense. As far as I can tell the reason that 12 sometimes ends
up with the proper timezone is that we shortcut the search by:
/*
* Try to avoid the brute-force search by seeing if we can recognize the
* system's timezone setting directly.
*
* Currently we just check /etc/localtime; there are other conventions for
* this, but that seems to be the only one used on enough platforms to be
* worth troubling over.
*/
if (check_system_link_file("/etc/localtime", &tt, resultbuf))
return resultbuf;
which is actually a behaviour changing, rather than just an
optimization, when there's a lot of equivalently scoring timezones.
Greetings,
Andres Freund
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