Horton

Re: Built-in CTYPE provider

Noah Misch <noah@leadboat.com>

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From: Noah Misch <noah@leadboat.com>
To: Jeff Davis <pgsql@j-davis.com>
Cc: Peter Eisentraut <peter@eisentraut.org>, Daniel Verite <daniel@manitou-mail.org>, Robert Haas <robertmhaas@gmail.com>, Jeremy Schneider <schneider@ardentperf.com>, pgsql-hackers@postgresql.org
Date: 2024-07-02T16:51:45Z
Lists: pgsql-hackers 
On Mon, Jul 01, 2024 at 06:19:08PM -0700, Jeff Davis wrote:
> On Mon, 2024-07-01 at 16:03 -0700, Noah Misch wrote:
> >   An alternative would be to make pg_upgrade reject
> > operating on a cluster that contains use of $SUBJECT.
> 
> That wouldn't help anyone.

Can you say more about that?  For the last decade at least, I think our
standard for new features has been to error rather than allow an operation
that creates a known path to wrong query results.  I think that's a helpful
standard that we should continue to follow.

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.