Horton

Re: Built-in CTYPE provider

Peter Eisentraut <peter@eisentraut.org>

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From: Peter Eisentraut <peter@eisentraut.org>
To: Jeff Davis <pgsql@j-davis.com>, Daniel Verite <daniel@manitou-mail.org>
Cc: Robert Haas <robertmhaas@gmail.com>, Jeremy Schneider <schneider@ardentperf.com>, pgsql-hackers@postgresql.org
Date: 2024-03-19T12:41:35Z
Lists: pgsql-hackers 
* v25-0001-Address-more-review-comments-on-commit-2d819a08a.patch

This was committed.

* v25-0002-Support-C.UTF-8-locale-in-the-new-builtin-collat.patch

Looks ok.

* v25-0003-Inline-basic-UTF-8-functions.patch

ok

* v25-0004-Use-version-for-builtin-collations.patch

Not sure about the version format "1.0", which implies some sort of 
major/minor or component-based system.  I would just use "1".

* v25-0005-Add-unicode_strtitle-for-Unicode-Default-Case-Co.patch
* v25-0006-Support-Unicode-full-case-mapping-and-conversion.patch
* v25-0007-Support-PG_UNICODE_FAST-locale-in-the-builtin-co.patch

0005 and 0006 don't contain any test cases.  So I guess they are really 
only usable via 0007.  Is that understanding correct?

Btw., tested initcap() on Oracle:

select initcap('džudo') from dual;

(which uses the precomposed U+01F3) and the result is

DŽudo

(with the precomposed uppercase character).  So that matches the 
behavior proposed in your 0002 patch.

Are there any test cases that illustrate the word boundary changes in 
patch 0005?  It might be useful to test those against Oracle as well.

Commits

  1. Support PG_UNICODE_FAST locale in the builtin collation provider.

  2. Support Unicode full case mapping and conversion.

  3. Fix test failures when language environment is not UTF-8.

  4. Add unicode_strtitle() for Unicode Default Case Conversion.

  5. Use version for builtin collations.

  6. Fix convert_case(), introduced in 5c40364dd6.

  7. Inline basic UTF-8 functions.

  8. Support C.UTF-8 locale in the new builtin collation provider.

  9. Fix another warning, introduced by 846311051e.

  10. Address more review comments on commit 2d819a08a1.

  11. Fix unreachable code warning from commit 2d819a08a1.

  12. Introduce "builtin" collation provider.

  13. Catalog changes preparing for builtin collation provider.

  14. Unicode case mapping tables and functions.

  15. Add Unicode property tables.

  16. Documentation update for Standard Collations.

  17. Cleanup for unicode-update build target and test.

  18. Shrink Unicode category table.

  19. Make some error strings more generic

  20. pg_upgrade: copy locale and encoding information to new cluster.

  21. Update Unicode data to Unicode 15.0.0

  22. Create a new type category for "internal use" types.