Horton

RE: [HACKERS] logical decoding of two-phase transactions

Takamichi Osumi (Fujitsu) <osumi.takamichi@fujitsu.com>

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From: "osumi.takamichi@fujitsu.com" <osumi.takamichi@fujitsu.com>
To: 'Peter Smith' <smithpb2250@gmail.com>, vignesh C <vignesh21@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2021-03-19T06:48:52Z
Lists: pgsql-hackers

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Hi


On Saturday, March 13, 2021 5:01 PM osumi.takamichi@fujitsu.com <osumi.takamichi@fujitsu.com> wrote:
> On Friday, March 12, 2021 5:40 PM Peter Smith <smithpb2250@gmail.com>
> > Please find attached the latest patch set v58*
> Thank you for updating those. I'm testing the patchset and I think it's
> preferable that you add simple two types of more tests in 020_twophase.pl
> because those aren't checked by v58.
> 
> (1) execute single PREPARE TRANSACTION
> 	which affects several tables (connected to corresponding
> publications)
> 	at the same time and confirm they are synced correctly.
> 
> (2) execute single PREPARE TRANSACTION which affects multiple
> subscribers
> 	and confirm they are synced correctly.
> 	This doesn't mean cascading standbys like
> 022_twophase_cascade.pl.
> 	Imagine that there is one publisher and two subscribers to it.
Attached a patch for those two tests. The patch works with v62.
I tested this in a loop more than 100 times and showed no failure.

Best Regards,
	Takamichi Osumi

Commits

  1. Add prepare API support for streaming transactions in logical replication.

  2. Doc: minor improvements for logical replication protocol documentation.

  3. Fix test failure in 021_twophase.pl.

  4. Refactor to make common functions in proto.c and worker.c.

  5. Unify PostgresNode's new() and get_new_node() methods

  6. Fix potential buffer overruns in proto.c.

  7. Add support for prepared transactions to built-in logical replication.

  8. Refactor function parse_subscription_options.

  9. Allow enabling two-phase option via replication protocol.

  10. Don't use Asserts to check for violations of replication protocol.

  11. Improve psql tab completion for options of subcriptions and publications

  12. Rearrange logrep worker's snapshot handling some more.

  13. doc: Update information of new messages for logical replication.

  14. ALTER SUBSCRIPTION ... ADD/DROP PUBLICATION

  15. Allow pgoutput to send logical decoding messages.

  16. Refactor function parse_output_parameters.

  17. Avoid repeated decoding of prepared transactions after a restart.

  18. Fix an oversight in ReorderBufferFinishPrepared.

  19. Allow multiple xacts during table sync in logical replication.

  20. Fix replication of in-progress transactions in tablesync worker.

  21. Fix 'skip-empty-xacts' option in test_decoding for streaming mode.

  22. Use Enum for top level logical replication message types.

  23. Add support for streaming to built-in logical replication.

  24. Fix the logical streaming test.

  25. Implement streaming mode in ReorderBuffer.

  26. Extend the logical decoding output plugin API with stream methods.

  27. Store 2PC GID in commit/abort WAL recs for logical decoding