Horton

Re: SQL:2011 application time

Corey Huinker <corey.huinker@gmail.com>

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From: Corey Huinker <corey.huinker@gmail.com>
To: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Cc: Paul A Jungwirth <pj@illuminatedcomputing.com>, Jaime Casanova <jcasanov@systemguards.com.ec>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2022-01-05T22:03:23Z
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 Wed, Jan 5, 2022 at 11:07 AM Peter Eisentraut <
peter.eisentraut@enterprisedb.com> wrote:

> On 21.11.21 02:51, Paul A Jungwirth wrote:
> > Here are updated patches. They are rebased and clean up some of my
> > TODOs.
>
> This patch set looks very interesting.  It's also very big, so it's
> difficult to see how to get a handle on it.  I did a pass through it
> to see if there were any obvious architectural or coding style
> problems.  I also looked at some of your TODO comments to see if I had
> something to contribute there.
>
> I'm confused about how to query tables based on application time
> periods.  Online, I see examples using AS OF, but in the SQL standard
> I only see this used for system time, which we are not doing here.
> What is your understanding of that?
>

Paul has previously supplied me with this document
https://cs.ulb.ac.be/public/_media/teaching/infoh415/tempfeaturessql2011.pdf
and that formed the basis of a lot of my questions a few months earlier.

There was similar work being done for system periods, which are a bit
simpler but require a side (history) table to be created. I was picking
people's brains about some aspects of system versioning to see if I could
help bringing that into this already very large patchset, but haven't yet
felt like I had done enough research to post it.

It is my hope that we can at least get the syntax for both application and
system versioning committed, even if it's just stubbed in with
not-yet-supported errors.