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From: Jeremy Schneider <[email protected]>
To: Peter Eisentraut <[email protected]>
Cc: Peter Geoghegan <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: Finnerty, Jim <[email protected]>
Cc: Nasby, Jim <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: pgsql-hackers <[email protected]>
Subject: Re: Collation version tracking for macOS
Date: Tue, 14 Jun 2022 15:10:16 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>


> On Jun 14, 2022, at 14:10, Peter Eisentraut <[email protected]> wrote:
> 
> Conversely, why are we looking at the ICU version instead of the collation version.  If we have recorded the collation as being version 1234, we need to look through the available ICU versions (assuming we can load multiple ones somehow) and pick the one that provides 1234.  It doesn't matter whether it's the same ICU version that the collation was originally created with, as long as the collation version stays the same.

Does Unicode CDLR provide (or even track) versioning of collation or other i18n functionality for individual locale settings? I’m thinking it might not even have that concept in the original source repo/data, but I might be remembering wrong.

It would require not only watching for changes in the per-locale tailoring rules but also being cognizant of changes in root/DUCET behavior and understanding the impact of changes there.

(Common mistake I’ve seen folks make when comparing OS glibc versions is only looking at locale data, not realizing there have been changes to root behavior that didn’t involve any changes to local data files)

-Jeremy

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