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Re: tzdata version

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Jerome Wagner <jerome.wagner@xxxxxxxxxxx> writes:
> As i understand it, the tzdata on which the timezone information is based
> is updated regularly (semi-manually) in https://github.com/
> postgres/postgres/tree/master/src/timezone

> Am i correct in stating that there is currently no way to update the tzdata
> database except by recompiling postgres after a new version of the tz
> database has been adapted for postgres ?

It's in the standard tzdata format, so if you have a copy of zic laying
about, you could download a new tzdata file set and run zic to install
the new files into the PG installation tree.  There's no need to recompile
Postgres per se.

However, if this seems like a problem to you and you are on a platform
whose vendor updates tzdata reliably, you should consider building PG
with --with-system-tzdata so that it will rely on the vendor copy.
We've always seen distributing a copy of tzdata as being mainly a
service to people stuck on platforms where that doesn't happen.

> Is there a way to introspect the current version of the tzdata release
> (2014j, 2016h, 2017b, ..) that is embedded in a pre-compiled postgres (at
> runtime or in another way) ?

I don't know of any version labeling in the tzdata files themselves
(not that I've looked very hard for one).  If you know your PG minor
release you could look into our release notes to see what tzdata
release it shipped with.

			regards, tom lane


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