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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: "Julien Rouhaud" <rjuju123@gmail.com>
Cc: Peter Eisentraut <peter.eisentraut@enterprisedb.com>, Pgsql-Hackers <pgsql-hackers@postgresql.org>
Date: 2022-01-11T11:36:46Z
Lists: pgsql-hackers 
	Julien Rouhaud wrote:

> > I guess there's still the possibility of requiring that the ICU db-wide
> > collation of the new database does exist in the template database,
> > and then the CREATE DATABASE would refer to that collation instead of
> > an independent locale string.
> 
> That could work.  However if having the collation in the template database a
> strict requirement the something should also be done for initdb, and it will
> probably be a bigger problem.

If CREATE DATABASE referred to a collation in the template db,
either that collation already exists, or the user would have to add it
to the template db with CREATE COLLATION.
initdb already populates the template databases with a full set of
ICU collations through pg_import_system_collations().
I don't quite see what change you're seeing that would be needed in
initdb.


Best regards,
-- 
Daniel Vérité
PostgreSQL-powered mailer: https://www.manitou-mail.org
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 Fix outdated --help message for postgres -f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