Re: row filtering for logical replication

Greg Nancarrow <gregn4422@gmail.com>

From: Greg Nancarrow <gregn4422@gmail.com>
To: Peter Smith <smithpb2250@gmail.com>
Cc: Ajin Cherian <itsajin@gmail.com>, Dilip Kumar <dilipbalaut@gmail.com>, Amit Kapila <amit.kapila16@gmail.com>, Euler Taveira <euler@eulerto.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>, Tomas Vondra <tomas.vondra@2ndquadrant.com>, Amit Langote <amitlangote09@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2021-10-26T07:26:20Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →
  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 Tue, Oct 26, 2021 at 3:24 PM Peter Smith <smithpb2250@gmail.com> wrote:
>
> PSA new set of patches:
>
> v34-0001 = the "main" patch from Euler. No change
>
> v34-0002 = tab auto-complete. No change
>
> v34-0003 = cache updates. Addresses Tomas review comment #3 [1].
>
> v34-0004 = filter validation replica identity. Addresses Tomas review
> comment #8 and #9 [1].
>
> v34-0005 = filter validation walker. Addresses Tomas review comment #6 [1]
>
> v34-0006 = support old/new tuple logic for row-filters. Modified, but
> no functional change.
>
> ------
> [1] https://www.postgresql.org/message-id/574b4e78-2f35-acf3-4bdc-4b872582e739%40enterprisedb.com
>

A few comments for some things I have noticed so far:

1) scantuple cleanup seems to be missing since the v33-0001 patch.

2) I don't think that the ResetExprContext() calls (before
FreeExecutorState()) are needed in the pgoutput_row_filter() and
pgoutput_row_filter_virtual() functions.

3) make check-world fails, due to recent changes to PostgresNode.pm.
I found that the following updates are needed:

diff --git a/src/test/subscription/t/025_row_filter.pl
b/src/test/subscription/t/025_row_filter.pl
index 742bbbe8a8..3fc503f2e4 100644
--- a/src/test/subscription/t/025_row_filter.pl
+++ b/src/test/subscription/t/025_row_filter.pl
@@ -1,17 +1,17 @@
 # Test logical replication behavior with row filtering
 use strict;
 use warnings;
-use PostgresNode;
-use TestLib;
+use PostgreSQL::Test::Cluster;
+use PostgreSQL::Test::Utils;
 use Test::More tests => 7;

 # create publisher node
-my $node_publisher = PostgresNode->new('publisher');
+my $node_publisher = PostgreSQL::Test::Cluster->new('publisher');
 $node_publisher->init(allows_streaming => 'logical');
 $node_publisher->start;

 # create subscriber node
-my $node_subscriber = PostgresNode->new('subscriber');
+my $node_subscriber = PostgreSQL::Test::Cluster->new('subscriber');
 $node_subscriber->init(allows_streaming => 'logical');
 $node_subscriber->start;


Regards,
Greg Nancarrow
Fujitsu Australia