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Re: Order changes in PG16 since ICU introduction

Andrew Gierth <andrew@tao11.riddles.org.uk>

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From: Andrew Gierth <andrew@tao11.riddles.org.uk>
To: Jeff Davis <pgsql@j-davis.com>
Cc: Peter Eisentraut <peter.eisentraut@enterprisedb.com>, Sandro Santilli <strk@kbt.io>, Tom Lane <tgl@sss.pgh.pa.us>, Regina Obe <lr@pcorp.us>, pgsql-hackers@lists.postgresql.org
Date: 2023-04-21T21:35:09Z
Lists: pgsql-hackers 
>>>>> "Jeff" == Jeff Davis <pgsql@j-davis.com> writes:

 >> Is that the right fix, though? (It forces --locale-provider=libc for
 >> the cluster default, which might not be desirable?)

 Jeff> For the "no locale" behavior (memcmp()-based) the provider needs
 Jeff> to be libc. Do you see an alternative?

Can lc_collate_is_c() be taught to check whether an ICU locale is using
POSIX collation?

There's now another bug in that --no-locale no longer does the same
thing as --locale=C (which is its long-established documented behavior).
How should these various options interact? This all seems not well
thought out from a usability perspective, and I think a proper fix
should involve a bit more serious consideration.

-- 
Andrew.

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Introduce "builtin" collation provider.

  2. ICU: do not convert locale 'C' to 'en-US-u-va-posix'.

  3. initdb: change default --locale-provider back to libc.

  4. CREATE DATABASE: make LOCALE apply to all collation providers.

  5. Remove read-only server settings lc_collate and lc_ctype

  6. ICU: use uloc_getDefault() for initdb.

  7. Doc fixes for commit 1e16af8ab5.

  8. Doc: fix some rendering problems in the PDF docs build.

  9. Doc improvements for language tags and custom ICU collations.

  10. ICU: check for U_STRING_NOT_TERMINATED_WARNING.

  11. Reduce icu_validation_level default to WARNING.

  12. Revert "ICU: do not convert locale 'C' to 'en-US-u-va-posix'."

  13. Fix initdb --no-locale.

  14. Avoid character classification in regex escape parsing.