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Re: ICU for global collation

Daniel Verite <daniel@manitou-mail.org>

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From: "Daniel Verite" <daniel@manitou-mail.org>
To: "Finnerty, Jim" <jfinnert@amazon.com>
Cc: Robert Haas <robertmhaas@gmail.com>, Peter Eisentraut <peter.eisentraut@enterprisedb.com>, Julien Rouhaud <rjuju123@gmail.com>, Pgsql-Hackers <pgsql-hackers@postgresql.org>
Date: 2022-03-15T20:19:41Z
Lists: pgsql-hackers 
	Finnerty, Jim wrote:

> In ICU, the "locale" is just the first part of what we can pass to the
> "locale" parameter in CREATE COLLATION - the part before the optional '@'
> delimiter.  The ICU locale does not include the secondary or tertiary
> properties,

Why not? Please see
https://unicode-org.github.io/icu/userguide/locale

It says that "a locale consists of one or more pieces of ordered
information", the pieces being a language code, a script code, a
country code, a variant code, and keywords.


Best regards,
-- 
Daniel Vérité
https://postgresql.verite.pro/
Twitter: @DanielVerite

Commits

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

  1. Add CHECK_FOR_INTERRUPTS while restoring changes during decoding.

  2. Improve ICU option handling in CREATE DATABASE

  3. Don't allow creation of database with ICU locale with unsupported encoding

  4. Make locale option behavior more consistent

  5. pg_dump: Dump colliculocale

  6. Remove further unwanted linker flags from perl_embed_ldflags

  7. Doc: document possible need to raise kernel's somaxconn limit.

  8. Reduce warnings with -Wshadow=compatible-local builds

  9. Remove redundant spaces in _outA_Expr() output

  10. Fix outdated --help message for postgres -f

  11. pg_upgrade: Fix version comparison for global ICU support

  12. Silence -Wmaybe-uninitialized compiler warning in dbcommands.c.

  13. Add option to use ICU as global locale provider

  14. DefineCollation() code cleanup

  15. Change collate and ctype fields to type text

  16. Call pg_newlocale_from_collation() also with default collation

  17. Use libc version as a collation version on glibc systems.

  18. Silence -Wmaybe-uninitialized compiler warnings in dbcommands.c.

  19. Make LC_COLLATE and LC_CTYPE database-level settings. Collation and