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Re: ICU for global collation

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Cc: Julien Rouhaud <rjuju123@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>, Daniel Verite <daniel@manitou-mail.org>
Date: 2022-03-15T17:28:01Z
Lists: pgsql-hackers 
On Tue, Mar 15, 2022 at 12:58 PM Peter Eisentraut
<peter.eisentraut@enterprisedb.com> wrote:
> On 14.03.22 19:57, Robert Haas wrote:
> > 1. What will happen if I set the ICU collation to something that
> > doesn't match the libc collation? How bad are the consequences?
>
> These are unrelated, so there are no consequences.

Can you please elaborate on this?

> > 2. If I want to avoid a mismatch between the two, then I will need a
> > way to figure out which libc collation corresponds to a given ICU
> > collation. How do I do that?
>
> You can specify the same name for both.

Hmm. If every name were valid in both systems, I don't think you'd be
proposing two fields.

-- 
Robert Haas
EDB: http://www.enterprisedb.com

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 Fix outdated --help message for postgres -f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