Horton

RE: row filtering for logical replication

Zhijie Hou (Fujitsu) <houzj.fnst@fujitsu.com>

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From: "houzj.fnst@fujitsu.com" <houzj.fnst@fujitsu.com>
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Amit Kapila <amit.kapila16@gmail.com>, Peter Smith <smithpb2250@gmail.com>, "tanghy.fnst@fujitsu.com" <tanghy.fnst@fujitsu.com>, Euler Taveira <euler@eulerto.com>, Greg Nancarrow <gregn4422@gmail.com>, vignesh C <vignesh21@gmail.com>, Ajin Cherian <itsajin@gmail.com>, Dilip Kumar <dilipbalaut@gmail.com>, Rahila Syed <rahilasyed90@gmail.com>, Peter Eisentraut <peter.eisentraut@enterprisedb.com>, Önder Kalacı <onderkalaci@gmail.com>, japin <japinli@hotmail.com>, Michael Paquier <michael@paquier.xyz>, David Steele <david@pgmasters.net>, Craig Ringer <craig@2ndquadrant.com>, Amit Langote <amitlangote09@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2022-01-13T13:20:37Z
Lists: pgsql-hackers

Commits

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  1. Release cache tuple when no longer needed

  2. Add some additional tests for row filters in logical replication.

  3. Fix one of the tests introduced in commit 52e4f0cd47.

  4. Allow specifying row filters for logical replication of tables.

  5. Move scanint8() to numutils.c

  6. Replace Test::More plans with done_testing

  7. Reduce relcache access in WAL sender streaming logical changes

  8. Small cleanups related to PUBLICATION framework code

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

  10. Allow publishing the tables of schema.

  11. Doc: improve documentation of CREATE/ALTER SUBSCRIPTION.

  12. Add PublicationTable and PublicationRelInfo structs

  13. Remove unused argument "txn" in maybe_send_schema().

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

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

  16. Use l*_node() family of functions where appropriate

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

  18. Restore the portal-level snapshot after procedure COMMIT/ROLLBACK.

  19. Rename a parse node to be more general

  20. Remove unused column atttypmod from initial tablesync query

  21. SEARCH and CYCLE clauses

On Thur, Jan 13, 2022 5:22 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> >  /*
> > + * Only 3 publication actions are used for row filtering ("insert",
> > +"update",
> > + * "delete"). See RelationSyncEntry.exprstate[].
> > + */
> > +typedef enum RowFilterPubAction
> > +{
> > +	PUBACTION_INSERT,
> > +	PUBACTION_UPDATE,
> > +	PUBACTION_DELETE,
> > +	NUM_ROWFILTER_PUBACTIONS  /* must be last */ }
> RowFilterPubAction;
> 
> Please do not add NUM_ROWFILTER_PUBACTIONS as an enum value.  It's a bit
> of a lie and confuses things, because your enum now has 4 possible values, not
> 3.  I suggest to #define NUM_ROWFILTER_PUBACTIONS
> (PUBACTION_DELETE+1) instead.
> 
> > +	int			idx_ins = PUBACTION_INSERT;
> > +	int			idx_upd = PUBACTION_UPDATE;
> > +	int			idx_del = PUBACTION_DELETE;
> 
> I don't understand the purpose of these variables; can't you just use the
> constants?

Thanks for the comments !
Changed the code as suggested.

Best regards,
Hou zj