| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Daniel Westermann (DWE)" <daniel(dot)westermann(at)dbi-services(dot)com> |
| Cc: | Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>, Robert Haas <robertmhaas(at)gmail(dot)com>, Shay Rojansky <roji(at)roji(dot)org>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Should AT TIME ZONE be volatile? |
| Date: | 2021-11-11 19:17:59 |
| Message-ID: | 1580314.1636658279@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
"Daniel Westermann (DWE)" <daniel(dot)westermann(at)dbi-services(dot)com> writes:
> On Thu, 2021-11-11 at 09:52 -0500, Tom Lane wrote:
>> tzdb has an additional problem, which is that not updating is not an
>> option: if you're affected by a DST law change, you want that update,
>> and you frequently need it yesterday. We're definitely not set up
>> to handle that sort of update process, which is why we recommend
>> --with-system-tzdata.
> Where in the docs is this recommended? The only place I can find it is here:
> https://www.postgresql.org/docs/current/install-procedure.html
Yup, that's exactly the text I was thinking of. Maybe the recommendation
should be more enthusiastic --- it was written back when it was still
rather questionable whether a platform would have an up-to-date copy of
tzdata. (Maybe it still is, at least for the "up-to-date" part.)
regards, tom lane
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