Horton

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

Peter Smith <smithpb2250@gmail.com>

View thread View on postgr.es
From: Peter Smith <smithpb2250@gmail.com>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, vignesh C <vignesh21@gmail.com>, "tanghy.fnst@fujitsu.com" <tanghy.fnst@fujitsu.com>, Ajin Cherian <itsajin@gmail.com>, Greg Nancarrow <gregn4422@gmail.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2021-08-02T07:36:30Z
Lists: pgsql-hackers 
On Sat, Jul 31, 2021 at 9:36 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
>
> On Fri, Jul 30, 2021 at 9:32 AM Peter Smith <smithpb2250@gmail.com> wrote:
> >
> > Please find attached the latest patch set v100*
> >
>
> Few minor comments:
> 1.
> CREATE SUBSCRIPTION regress_testsub CONNECTION
> 'dbname=regress_doesnotexist' PUBLICATION testpub WITH (connect =
> false, two_phase = true);
>
>  \dRs+
> +
>  --fail - alter of two_phase option not supported.
>  ALTER SUBSCRIPTION regress_testsub SET (two_phase = false);
>
> Spurious line addition.
>

OK. Fixed in v101.

> 2.
> +TransactionId
> +logicalrep_read_stream_prepare(StringInfo in,
> LogicalRepPreparedTxnData *prepare_data)
> +{
> + logicalrep_read_prepare_common(in, "stream prepare", prepare_data);
> +
> + return prepare_data->xid;
> +}
>
> There is no need to return TransactionId separately. The caller can
> use from prepare_data, if required.
>

OK. Modified in v101

> 3.
>  extern void logicalrep_read_stream_abort(StringInfo in, TransactionId *xid,
>   TransactionId *subxid);
>
> +extern void logicalrep_write_stream_prepare(StringInfo out,
> ReorderBufferTXN *txn,
> + XLogRecPtr prepare_lsn);
> +extern TransactionId logicalrep_read_stream_prepare(StringInfo in,
> + LogicalRepPreparedTxnData *prepare_data);
> +
> +
>
> Keep the order of declarations the same as its definitions in proto.c
> which means move these after logicalrep_read_rollback_prepared() and
> be careful about extra blank lines.
>

OK. Reordered in v101.

------
Kind Regards,
Peter Smith.
Fujitsu Australia

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