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Re: ICU for global collation

Finnerty, Jim <jfinnert@amazon.com>

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From: "Finnerty, Jim" <jfinnert@amazon.com>
To: Robert Haas <robertmhaas@gmail.com>, 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: 2022-03-15T19:47:09Z
Lists: pgsql-hackers 
Can we get some more consistent terminology around the term "locale"?

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, so it is usually just the country and the language, e.g. en_US (or en-US), but it can also be something like es_TRADITIONAL for traditional Spanish.  

I think it would be an improvement in clarity if we consistently use the term 'locale' to mean the same thing that ICU means by that term, and not to have the thing that we call the "locale" also include collation modifiers, or to imply that a locale is the same thing as a collation.

    /Jim

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 Fix outdated --help message for postgres -f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