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From: Joe Conway <mail@joeconway.com>
To: Jeff Davis <pgsql@j-davis.com>
To: Peter Eisentraut <peter@eisentraut.org>
To: Daniel Verite <daniel@manitou-mail.org>
Cc: Andrew Gierth <andrew@tao11.riddles.org.uk>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-hackers@lists.postgresql.org
Subject: Re: Order changes in PG16 since ICU introduction
Date: Thu, 8 Jun 2023 17:59:43 -0400
Message-ID: <097aac39-fe4f-1d3c-e3a2-5563ffc0aa3d@joeconway.com> (raw)
In-Reply-To: <20f4e529e17af61bce11fe05cb056f28a809b840.camel@j-davis.com>
References: <543e4ce6-8205-4aea-b54b-12b9ef747bf6@manitou-mail.org>
	<654a49f7ff7461bcf47be4181430678d45f93858.camel@j-davis.com>
	<37520ec1ae9591f83132f82dbd625f3fc2d69c16.camel@j-davis.com>
	<daa9f060aa2349ebc84444515efece49e7b32c5d.camel@j-davis.com>
	<c840107b-4cb9-c8e9-abb7-1d8c5e0d51df@enterprisedb.com>
	<a4388fa3acabf7794ac39fdb471ad97eebdfbe11.camel@j-davis.com>
	<5111ffef640ec7ed5b75d9791dd18d821e96c31e.camel@j-davis.com>
	<0f03fa26-741c-b1ee-12ab-566116451ab1@eisentraut.org>
	<d4fcacbf4ccd829b5d138590bfe8f6d5e72cced8.camel@j-davis.com>
	<5ecb1eec-c115-6de9-8dd4-4bf214b8ebda@joeconway.com>
	<20f4e529e17af61bce11fe05cb056f28a809b840.camel@j-davis.com>

On 6/8/23 17:15, Jeff Davis wrote:
> On Wed, 2023-06-07 at 20:52 -0400, Joe Conway wrote:
>> If the provider has no such thing, throw an error.
> 
> Just to be clear, that implies that users (and buildfarm members) with
> LANG=C.UTF-8 in their environment would not be able to run a plain
> "initdb -D data"; they'd get an error. It's hard for me to estimate how
> many users might be inconvenienced by that, but it sounds like a risk.

Well, but only if their libc provider does not have C.UTF-8, correct?

I see
----------------
Linux Mint 21.1:	/usr/lib/locale/C.utf8
RHEL 8:			/usr/lib/locale/C.utf8
RHEL 9:			/usr/lib/locale/C.utf8
AL2:			/usr/lib/locale/C.utf8

However I do not see it on RHEL 7 :-(

> Perhaps for this specific case, and only in initdb, we change
> C.anything and POSIX.anything to the builtin provider?

Might be best, with some kind of warning perhaps?

> CREATE DATABASE and CREATE COLLATION could still reject such
> locales.

Seems to make sense.

-- 
Joe Conway
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com






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