| From: | Joe Conway <mail(at)joeconway(dot)com> |
|---|---|
| To: | Daniel Verite <daniel(at)manitou-mail(dot)org>, Jeff Davis <pgsql(at)j-davis(dot)com> |
| Cc: | Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>, Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: Order changes in PG16 since ICU introduction |
| Date: | 2023-06-06 18:11:18 |
| Message-ID: | 6b3df50c-3195-4f40-e04f-c25f489383f7@joeconway.com |
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| Lists: | pgsql-hackers |
On 6/6/23 09:09, Daniel Verite wrote:
> Jeff Davis wrote:
>> New patch series attached. I plan to commit 0001 and 0002 soon, unless
>> there are objections.
>>
>> 0001 causes the "C" and "POSIX" locales to be treated with
>> memcmp/pg_ascii semantics in ICU, just like in libc. We also
>> considered a new "none" provider, but it's more invasive, and we can
>> always reconsider that in the v17 cycle.
> 0001 creates exceptions throughout the code so that when an ICU
> collation has a locale name "C" or "POSIX" then it does not behave
> like an ICU collation, even though pg_collation.collprovider='i'
> To me it's neither desirable nor necessary that a collation that
> has collprovider='i' is diverted to non-ICU semantics.
This discussion makes me wonder (though probably too late for the v16
cycle) if we shouldn't treat "C" and "POSIX" locales to be a third
provider, something like "internal".
--
Joe Conway
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com
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