Horton
Menu

Re: ICU for global collation

Marina Polyakova <m.polyakova@postgrespro.ru>

View thread
From: Marina Polyakova <m.polyakova@postgrespro.ru>
To: pgsql-hackers@postgresql.org
Cc: Justin Pryzby <pryzby@telsasoft.com>, Julien Rouhaud <rjuju123@gmail.com>, Daniel Verite <daniel@manitou-mail.org>, AndrewBille@gmail.com, michael@paquier.xyz, peter.eisentraut@enterprisedb.com
Date: 2022-09-14T14:19:34Z
Lists: pgsql-hackers

Attachments

Hello!

I was surprised that it is allowed to create clusters/databases where 
the default ICU collations do not actually work due to unsupported 
encodings:

$ initdb --encoding SQL_ASCII --locale-provider icu --icu-locale en-US 
-D data &&
pg_ctl -D data -l logfile start &&
psql -c "SELECT 'a' < 'b'" template1
...
waiting for server to start.... done
server started
ERROR:  encoding "SQL_ASCII" not supported by ICU

$ createdb --encoding SQL_ASCII --locale-provider icu --icu-locale en-US 
--template template0 mydb &&
psql -c "SELECT 'a' < 'b'" mydb
ERROR:  encoding "SQL_ASCII" not supported by ICU

The patch diff_check_icu_encoding.patch prohibits the creation of such 
objects...

-- 
Marina Polyakova
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company

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 Fix outdated --help message for postgres -f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