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: Amit Kapila <amit.kapila16@gmail.com>
Cc: Greg Nancarrow <gregn4422@gmail.com>, "tanghy.fnst@fujitsu.com" <tanghy.fnst@fujitsu.com>, "osumi.takamichi@fujitsu.com" <osumi.takamichi@fujitsu.com>, "houzj.fnst@fujitsu.com" <houzj.fnst@fujitsu.com>, Alexey Lesovsky <lesovsky@gmail.com>, Peter Eisentraut <peter.eisentraut@enterprisedb.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2021-08-26T12:53:46Z
Lists: pgsql-hackers 
On Thu, Aug 26, 2021 at 9:11 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
>
> On Thu, Aug 26, 2021 at 4:42 PM Masahiko Sawada <sawada.mshk@gmail.com> wrote:
> >
> > On Thu, Aug 26, 2021 at 3:09 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
> > > 1.
> > > + if (errarg->rel)
> > > + appendStringInfo(&buf, _(" for replication target relation \"%s.%s\""),
> > > + errarg->rel->remoterel.nspname,
> > > + errarg->rel->remoterel.relname);
> > > +
> > > + if (errarg->remote_attnum >= 0)
> > > + appendStringInfo(&buf, _(" column \"%s\""),
> > > + errarg->rel->remoterel.attnames[errarg->remote_attnum]);
> > >
> > > Isn't it better if 'remote_attnum' check is inside if (errargrel)
> > > check? It will be weird to print column information without rel
> > > information and in the current code, we don't set remote_attnum
> > > without rel. The other possibility could be to have an Assert for rel
> > > in 'remote_attnum' check.
> >
> > Agreed to check 'remote_attnum' inside "if(errargrel)".
> >
>
> Okay, changed accordingly. Additionally, I have changed the code which
> sets timestamp to (unset) when it is 0 so that it won't display the
> timestamp in that case. I have made few other cosmetic changes in the
> attached patch. See and let me know what you think of it?

Thank you for the patch!

Agreed with these changes. The patch looks good to me.

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