Horton

Re: SQL:2011 application time

Paul A Jungwirth <pj@illuminatedcomputing.com>

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From: Paul A Jungwirth <pj@illuminatedcomputing.com>
To: Peter Eisentraut <peter@eisentraut.org>
Cc: jian he <jian.universality@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2024-09-16T02:12:34Z
Lists: pgsql-hackers

Commits

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

  1. Rename gist stratnum support function

  2. Remove support for temporal RESTRICT foreign keys

  3. Cache NO ACTION foreign keys separately from RESTRICT foreign keys

  4. Fix NO ACTION temporal foreign keys when the referenced endpoints change

  5. Improve whitespace in without_overlaps test

  6. Tests for logical replication with temporal keys

  7. Support for GiST in get_equal_strategy_number()

  8. Make the conditions in IsIndexUsableForReplicaIdentityFull() more explicit

  9. Replace get_equal_strategy_number_for_am() by get_equal_strategy_number()

  10. Improve internal logical replication error for missing equality strategy

  11. Simplify IsIndexUsableForReplicaIdentityFull()

  12. Fix ALTER TABLE / REPLICA IDENTITY for temporal tables

  13. doc: Update pg_constraint.conexclop docs for WITHOUT OVERLAPS

  14. doc: Add PERIOD to ALTER TABLE reference docs

  15. doc: Add WITHOUT OVERLAPS to ALTER TABLE reference docs

  16. Add temporal FOREIGN KEY contraints

  17. Add temporal PRIMARY KEY and UNIQUE constraints

  18. Add stratnum GiST support function

  19. Avoid crashing when a JIT-inlined backend function throws an error.

  20. Revert temporal primary keys and foreign keys

  21. Fix ON CONFLICT DO NOTHING/UPDATE for temporal indexes

  22. Add test for REPLICA IDENTITY with a temporal key

  23. Use half-open interval notation in without_overlaps tests

  24. Use daterange and YMD in without_overlaps tests instead of tsrange.

  25. Rename pg_constraint.conwithoutoverlaps to conperiod

  26. Fix comment on gist_stratnum_btree

  27. Add missing TAP test name

  28. Improve error handling of HMAC computations

  29. Rename functions to avoid future conflicts

On Mon, Feb 12, 2024 at 3:55 AM Peter Eisentraut <peter@eisentraut.org> wrote:
> Have you checked that the generated queries can use indexes and have
> suitable performance?  Do you have example execution plans maybe?

This took longer than expected, but I wrote a long blog post about it
here: https://illuminatedcomputing.com/posts/2024/09/benchmarking-temporal-foreign-keys/

The short answer is that yes we use the index, and the query plan is
reasonable. I compared performance against two alternate
implementations, and range_agg was fastest most of the time. When you
have a lot of invalid FK checks, the implementation in Snodgrass's
book wins, because it can short-circuit the plan and return a false
result without executing most of it. But that seems like an unusual
situation, and we should optimize for mostly-valid FK checks instead.

There are some more experiments I'd like to do (see the end of that
post), but for now I plan to prioritize getting the FOR PORTION OF
patch ready to commit. But if there is anything you'd like to know
more urgently, let me know.

Yours,

-- 
Paul              ~{:-)
pj@illuminatedcomputing.com