Horton

Re: SQL:2011 application time

Paul A Jungwirth <pj@illuminatedcomputing.com>

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From: Paul A Jungwirth <pj@illuminatedcomputing.com>
To: jian he <jian.universality@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Date: 2023-11-19T05:32:52Z
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, Nov 6, 2023 at 11:07 PM jian he <jian.universality@gmail.com> wrote:
> +         </para>
> +          In a temporal foreign key, the delete/update will use
> +          <literal>FOR PORTION OF</literal> semantics to constrain the
> +          effect to the bounds being deleted/updated in the referenced row.
> +         </para>
>
> The first "para" should be <para> ?

Thanks, fixed (in v18)!

> There are many warnings after #define WRITE_READ_PARSE_PLAN_TREES
> see: http://cfbot.cputube.org/highlights/all.html#4308
> Does that mean oue new change in gram.y is somehow wrong?

Fixed (in read+out node funcs).

> sgml/html/sql-update.html:
> "range_or_period_name
> The range column or period to use when performing a temporal update.
> This must match the range or period used in the table's temporal
> primary key."
>
> Is the second sentence unnecessary? since no primary can still do "for
> portion of update".

You're right, this dates back to an older version of the patch. Removed.

> sgml/html/sql-update.html:
> "start_time
> The earliest time (inclusive) to change in a temporal update. This
> must be a value matching the base type of the range or period from
> range_or_period_name. It may also be the special value MINVALUE to
> indicate an update whose beginning is unbounded."
>
> probably something like the following:
> "lower_bound"
> The lower bound (inclusive) to change in an overlap update. This must
> be a value matching the base type of the range or period from
> range_or_period_name. It may also be the special value UNBOUNDED to
> indicate an update whose beginning is unbounded."
>
> Obviously the "start_time" reference also needs to change, and the
> sql-delete.html reference also needs to change.

See below re UNBOUNDED....

> UPDATE for_portion_of_test FOR PORTION OF valid_at  FROM NULL TO
> "unbounded" SET name = 'NULL to NULL';
> should fail, but not. double quoted unbounded is a column reference, I assume.
>
> That's why I am confused with the function transformForPortionOfBound.
> "if (nodeTag(n) == T_ColumnRef)" part.

You're right, using a ColumnDef was probably not good here, and
treating `"UNBOUNDED"` (with quotes from the user) as a keyword is no
good. I couldn't find a way to make this work without reduce/reduce
conflicts, so I just took it out. It was syntactic sugar for `FROM/TO
NULL` and not part of the standard, so it's not too important. Also I
see that UNBOUNDED causes difficult problems already with window
functions (comments in gram.y). I hope I can find a way to make this
work eventually, but it can go for now.

> in create_table.sgml. you also need to add  WITHOUT OVERLAPS related
> info into <varlistentry id="sql-createtable-parms-unique">

You're right, fixed (though Peter's patch then changed this same spot).

Thanks,

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