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From: Jeff Davis <[email protected]>
To: Pavel Stehule <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: [email protected]
Subject: Re: Move defaults toward ICU in 16?
Date: Fri, 17 Feb 2023 12:43:47 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAFj8pRBPW2bKMsCuwHqEvhubwin_gb=ynY=V45KT3C=nF1MFzA@mail.gmail.com>
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On Fri, 2023-02-17 at 18:27 +0100, Pavel Stehule wrote:
> Today I tested icu for Czech sorting. It is a little bit slower, but
> not too much, but it produces partially different results.

Thank you for trying it.

If it's a significant slowdown, can you please send more information?
ICU version, libc version, and testcase?

> select row_number() over (order by nazev collate "cs-x-icu"), nazev
> from obce 
> except select row_number() over (order by nazev collate "cs_CZ"),
> nazev from obce;
> 
> returns a not empty set. So minimally for Czech collate, an index
> rebuild is necessary

Yes, that's true of any locale change, provider change, or even
provider version change.


-- 
Jeff Davis
PostgreSQL Contributor Team - AWS

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