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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: Peter Eisentraut <peter.eisentraut@enterprisedb.com>, Julien Rouhaud <rjuju123@gmail.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>, Daniel Verite <daniel@manitou-mail.org>
Date: 2022-01-17T17:30:45Z
Lists: pgsql-hackers 
Re: 
>> After this patch goes in, the big next thing would be to support
>> nondeterministic collations for LIKE, ILIKE and pattern matching operators in
>> general.  Is anyone interested in working on that?

> As far as I know you're the last person that seemed to be working on that topic
> back in March :)

I have a solution for LIKE and ILIKE for case-insensitive, accent-sensitive ICU collations and the UTF8 server encoding, but didn't attempt to address the general case until ICU collations were supported at the database and cluster levels.  I may have another look at that after this patch goes in.

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 Fix outdated --help message for postgres -f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