Horton

Re: SQL:2011 application time

jian he <jian.universality@gmail.com>

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From: jian he <jian.universality@gmail.com>
To: Paul Jungwirth <pj@illuminatedcomputing.com>
Cc: Peter Eisentraut <peter@eisentraut.org>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2023-10-25T06:14:34Z
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

Attachments

On Wed, Oct 11, 2023 at 12:47 PM Paul Jungwirth
<pj@illuminatedcomputing.com> wrote:
>
> On 9/25/23 14:00, Peter Eisentraut wrote:
> > Looking through the tests in v16-0001:
> >
> > +-- PK with no columns just WITHOUT OVERLAPS:
> > +CREATE TABLE temporal_rng (
> > +       valid_at tsrange,
> > +       CONSTRAINT temporal_rng_pk PRIMARY KEY (valid_at WITHOUT OVERLAPS)
> > +);
> > +ERROR:  syntax error at or near "WITHOUT"
> > +LINE 3:  CONSTRAINT temporal_rng_pk PRIMARY KEY (valid_at WITHOUT OV...
> > +                                                          ^
> >
> > I think this error is confusing.  The SQL standard requires at least one
> > non-period column in a PK.  I don't know why that is or why we should
> > implement it.  But if we want to implement it, maybe we should enforce
> > that in parse analysis rather than directly in the parser, to be able to
> > produce a more friendly error message.
>
> Okay.
>
> (I think the reason the standard requires one non-period column is to
> identify the "entity". If philosophically the row is an Aristotelian
> proposition about that thing, the period qualifies it as true just
> during some time span. So the scalar part is doing the work that a PK
> conventionally does, and the period part does something else. Perhaps a
> PK/UNIQUE constraint with no scalar part would still be useful, but not
> very often I think, and I'm not sure it makes sense to call it PK/UNIQUE.)
>
> > +-- PK with a range column/PERIOD that isn't there:
> > +CREATE TABLE temporal_rng (
> > +       id INTEGER,
> > +       CONSTRAINT temporal_rng_pk PRIMARY KEY (id, valid_at WITHOUT
> > OVERLAPS)
> > +);
> > +ERROR:  range or PERIOD "valid_at" in WITHOUT OVERLAPS does not exist
> >
> > I think here we should just produce a "column doesn't exist" error
> > message, the same as if the "id" column was invalid.  We don't need to
> > get into the details of what kind of column it should be.  That is done
> > in the next test
>
> I'll change it. The reason for the different wording is that it might
> not be a column at all. It might be a PERIOD. So what about just "column
> or PERIOD doesn't exist"? (Your suggestion is fine too though.)
>
> > +ERROR:  column "valid_at" in WITHOUT OVERLAPS is not a range type
> >
> > Also, in any case it would be nice to have a location pointer here (for
> > both cases).
>
> Agreed.
>

I refactored findNeworOldColumn to better handle error reports.
please check the attached.