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Re: ICU for global collation

Peter Eisentraut <peter.eisentraut@2ndquadrant.com>

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From: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
To: Daniel Verite <daniel@manitou-mail.org>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2019-10-31T07:22:44Z
Lists: pgsql-hackers 
On 2019-09-17 15:08, Daniel Verite wrote:
> When trying databases defined with ICU locales, I see that backends
> that serve such databases seem to have their LC_CTYPE inherited from
> the environment (as opposed to a per-database fixed value).

> fr-utf8=# select to_tsvector('été');
> ERROR:	invalid multibyte character for locale
> HINT:  The server's LC_CTYPE locale is probably incompatible with the
> database encoding.

I looked into this problem.  The way to address this would be adding 
proper collation support to the text search subsystem.  See the TODO 
markers in src/backend/tsearch/ts_locale.c for starting points.  These 
APIs spread out to a lot of places, so it will take some time to finish. 
  In the meantime, I'm pausing this thread and will set the CF entry as RwF.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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 Fix outdated --help message for postgres -f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