Horton

Re: Skipping logical replication transactions on subscriber side

Masahiko Sawada <sawada.mshk@gmail.com>

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From: Masahiko Sawada <sawada.mshk@gmail.com>
To: Greg Nancarrow <gregn4422@gmail.com>
Cc: "houzj.fnst@fujitsu.com" <houzj.fnst@fujitsu.com>, "osumi.takamichi@fujitsu.com" <osumi.takamichi@fujitsu.com>, Alexey Lesovsky <lesovsky@gmail.com>, Peter Eisentraut <peter.eisentraut@enterprisedb.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>, Amit Kapila <amit.kapila16@gmail.com>
Date: 2021-08-17T05:16:12Z
Lists: pgsql-hackers 
On Mon, Aug 16, 2021 at 5:30 PM Greg Nancarrow <gregn4422@gmail.com> wrote:
>
> On Mon, Aug 16, 2021 at 5:54 PM houzj.fnst@fujitsu.com
> <houzj.fnst@fujitsu.com> wrote:
> >
> > Here is another comment:
> >
> > +char *
> > +logicalrep_message_type(LogicalRepMsgType action)
> > +{
> > ...
> > +               case LOGICAL_REP_MSG_STREAM_END:
> > +                       return "STREAM END";
> > ...
> >
> > I think most the existing code use "STREAM STOP" to describe the
> > LOGICAL_REP_MSG_STREAM_END message, is it better to return "STREAM STOP" in
> > function logicalrep_message_type() too ?
> >
>
> +1
> I think you're right, it should be "STREAM STOP" in that case.

It's right that we use "STREAM STOP" rather than "STREAM END" in many
places such as elog messages, a callback name, and source code
comments. As far as I have found there are two places where we’re
using "STREAM STOP": LOGICAL_REP_MSG_STREAM_END and a description in
doc/src/sgml/protocol.sgml. Isn't it better to fix these
inconsistencies in the first place? I think “STREAM STOP” would be
more appropriate.

Regards,

-- 
Masahiko Sawada
EDB:  https://www.enterprisedb.com/

Commits

  1. Test ALIGNOF_DOUBLE==4 compatibility under ALIGNOF_DOUBLE==8.

  2. Reorder subskiplsn in pg_subscription to avoid alignment issues.

  3. Add ALTER SUBSCRIPTION ... SKIP.

  4. Optionally disable subscriptions on error.

  5. Update docs of logical replication for commit 8d74fc96db.

  6. Respect permissions within logical replication.

  7. Fix regression test failure caused by commit 8d74fc96db.

  8. Add a view to show the stats of subscription workers.

  9. Add logical change details to logical replication worker errcontext.

  10. Rename LOGICAL_REP_MSG_STREAM_END to LOGICAL_REP_MSG_STREAM_STOP.

  11. Fix typo in protocol.sgml.

  12. Remove unused argument in apply_handle_commit_internal().

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

  14. Reorder pg_sequence columns to avoid alignment issue