Re: pg_upgrade doesn't copy ICU rules on template0

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Heikki Linnakangas <hlinnaka(at)iki(dot)fi>
Cc: Bohyun Lee <bohyun(dot)lee(at)databricks(dot)com>, shihao zhong <zhong950419(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pg_upgrade doesn't copy ICU rules on template0
Date: 2026-10-28 14:01:48
Message-ID: 1494334.1793196108@sss.pgh.pa.us
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Heikki Linnakangas <hlinnaka(at)iki(dot)fi> writes:
> Shihao reported at [1] that pg_upgrade doesn't copy template0's ICU
> rules. I think that was an oversight commit 30a53b792959, which added
> ICU rules.

Uh ... say what? template0 is supposed to be immutable after initdb.
I think the actual problem here is with whatever patch introduced
the possibility of this value changing.

regards, tom lane

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