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From: Tom Lane <[email protected]>
To: Peter Eisentraut <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: pgsql-hackers <[email protected]>
Subject: Re: Collation version tracking for macOS
Date: Fri, 03 Jun 2022 12:21:57 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<CA+hUKGKjkL=APm5nd3vGOtMAD_07nyvrbAaGaDduVD-EKM5Drw@mail.gmail.com>
	<[email protected]>

Peter Eisentraut <[email protected]> writes:
> On 07.05.22 02:31, Thomas Munro wrote:
>> Last time I looked into this it seemed like macOS's strcoll() gave
>> sensible answers in the traditional single-byte encodings, but didn't
>> understand UTF-8 at all so you get C/strcmp() order.  In other words
>> there was effectively nothing to version.

> Someone recently told me that collations in macOS have actually changed 
> recently and that this is a live problem.  See explanation here:

> https://github.com/PostgresApp/PostgresApp/blob/master/docs/documentation/reindex-warning.md?plain=1...

> So I think we should reconsider this patch, even for PG15.

According to that document, they changed it in macOS 11, which came out
a year and a half ago.  Given the lack of complaints, it doesn't seem
like this is urgent enough to mandate a post-beta change that would
have lots of downside (namely, false-positive warnings for every other
macOS update).

			regards, tom lane

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