Re: Supporting non-deterministic collations with tailoring rules.

From: "Daniel Verite" <daniel(at)manitou-mail(dot)org>
To: "Peter Eisentraut" <peter(at)eisentraut(dot)org>
Cc: pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: Supporting non-deterministic collations with tailoring rules.
Date: 2026-03-18 18:21:52
Message-ID: ee874a36-2e7f-459f-a3ee-11a3a739ab00@manitou-mail.org
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Peter Eisentraut wrote:

> Ok, committed.
>
> Thoughts on backpatching? Seems like a straightforward bug fix.

Thanks for pushing the patch!
I thought it was not a candidate for backpatching because it's
a collation change.
Now, to have a problem with that change in a minor release,
a user would need to have an ICU collation with a rule containing
"[strength N]", where N<>3, even though it was ineffective (so
either the user did not notice or they did but kept it
nonetheless). Users who reported the problem hoped for a backpatch,
but we cannot say there is zero risk with that change in a minor
release. Personally I'm +0.

Best regards,
--
Daniel Vérité
https://postgresql.verite.pro/

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