Horton

Re: Add SPLIT PARTITION/MERGE PARTITIONS commands

Alexander Lakhin <exclusion@gmail.com>

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From: Alexander Lakhin <exclusion@gmail.com>
To: Dmitry Koval <d.koval@postgrespro.ru>, Robert Haas <robertmhaas@gmail.com>, Alexander Korotkov <aekorotkov@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2024-04-12T17:00:00Z
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. Adjust errcode in checkPartition()

  2. Fix usage of palloc() in MERGE/SPLIT PARTITION(s) code

  3. Implement ALTER TABLE ... SPLIT PARTITION ... command

  4. Implement ALTER TABLE ... MERGE PARTITIONS ... command

  5. Calculate agglevelsup correctly when Aggref contains a CTE.

  6. Use PqMsg_* macros in applyparallelworker.c.

  7. Restrict psql meta-commands in plain-text dumps.

  8. Ensure we have a snapshot when updating various system catalogs.

  9. Use specific collation where needed in new test

  10. Expand virtual generated columns in the planner

  11. Virtual generated columns

  12. Define PG_LOGICAL_DIR for path pg_logical/ in data folder

  13. Revert support for ALTER TABLE ... MERGE/SPLIT PARTITION(S) commands

  14. Avoid repeated table name lookups in createPartitionTable()

  15. Provide deterministic order for catalog queries in partition_split.sql

  16. Don't copy extended statistics during MERGE/SPLIT partition operations

  17. Fix the name collision detection in MERGE/SPLIT partition operations

  18. Fix regression tests conflict in 3ca43dbbb6

  19. Add permission check for MERGE/SPLIT partition operations

  20. Fix one more portability shortcoming in new test_pg_dump test.

  21. Inherit parent's AM for partition MERGE/SPLIT operations

  22. Add tab completion for partition MERGE/SPLIT operations

  23. Rename tables in tests of partition MERGE/SPLIT operations

  24. Make new partitions with parent's persistence during MERGE/SPLIT

  25. Document the way partition MERGE/SPLIT operations create new partitions

  26. Change the way ATExecMergePartitions() handles the name collision

  27. Grammar fixes for split/merge partitions code

  28. Checks for ALTER TABLE ... SPLIT/MERGE PARTITIONS ... commands

  29. Fix some grammer errors from error messages and codes comments

  30. Support TZ and OF format codes in to_timestamp().

  31. Support identity columns in partitioned tables

  32. Fix indentation in twophase.c

  33. Fix corner-case planner failure for MERGE.

  34. Doc: fix documentation example for bytea hex output format.

  35. Avoid repeated name lookups during table and index DDL.

Hi Dmitry,

12.04.2024 16:04, Dmitry Koval wrote:
> Hi!
>
> Attached is a patch with corrections based on comments in previous letters (I think these corrections are not final).
> I'll be very grateful for feedbacks and bug reports.
>
> 11.04.2024 20:00, Alexander Lakhin wrote:
> > may be an attempt to merge into implicit
> > pg_temp should fail just like CREATE TABLE ... PARTITION OF ... does?
>
> Corrected. Result is:

Thank you!
Still now we're able to create a partition in the pg_temp schema
explicitly. Please try:
ALTER TABLE t
MERGE PARTITIONS (tp_0_1, tp_1_2) INTO pg_temp.tp_0_2;

in the scenario [1] and you'll get the same empty table.

[1] https://www.postgresql.org/message-id/fdaa003e-919c-cbc9-4f0c-e4546e96bd65%40gmail.com

Best regards,
Alexander