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Re: Order changes in PG16 since ICU introduction

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Joe Conway <mail@joeconway.com>
Cc: Jeff Davis <pgsql@j-davis.com>, Daniel Verite <daniel@manitou-mail.org>, Peter Eisentraut <peter.eisentraut@enterprisedb.com>, Andrew Gierth <andrew@tao11.riddles.org.uk>, pgsql-hackers@lists.postgresql.org
Date: 2023-06-06T19:25:26Z
Lists: pgsql-hackers 
Joe Conway <mail@joeconway.com> writes:
> On 6/6/23 15:18, Jeff Davis wrote:
>> The locale "C" is a special case, documented as a non-locale. So, if
>> LOCALE/--locale apply to ICU, then either ICU needs to handle locale
>> "C" in the expected way (v8 patch series); or when we see locale "C" we
>> need to somehow change the provider into something that can handle it
>> (v6 patch series changes it to the "none" provider).

> +1 to the latter approach

Also +1, except that I find "none" a rather confusing choice of name.
There *is* a provider, it's just PG itself not either libc or ICU.
I thought Joe's suggestion of "internal" made more sense.

			regards, tom lane

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Introduce "builtin" collation provider.

  2. ICU: do not convert locale 'C' to 'en-US-u-va-posix'.

  3. initdb: change default --locale-provider back to libc.

  4. CREATE DATABASE: make LOCALE apply to all collation providers.

  5. Remove read-only server settings lc_collate and lc_ctype

  6. ICU: use uloc_getDefault() for initdb.

  7. Doc fixes for commit 1e16af8ab5.

  8. Doc: fix some rendering problems in the PDF docs build.

  9. Doc improvements for language tags and custom ICU collations.

  10. ICU: check for U_STRING_NOT_TERMINATED_WARNING.

  11. Reduce icu_validation_level default to WARNING.

  12. Revert "ICU: do not convert locale 'C' to 'en-US-u-va-posix'."

  13. Fix initdb --no-locale.

  14. Avoid character classification in regex escape parsing.