Re: row filtering for logical replication

Peter Smith <smithpb2250@gmail.com>

From: Peter Smith <smithpb2250@gmail.com>

To: "houzj.fnst@fujitsu.com" <houzj.fnst@fujitsu.com>

Cc: Amit Kapila <amit.kapila16@gmail.com>, Alvaro Herrera <alvherre@alvh.no-ip.org>, "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: 2022-01-14T05:15:18Z

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 →

Release cache tuple when no longer needed
- ed0fbc8e5ac9 15.0 landed
Add some additional tests for row filters in logical replication.
- ceb57afd3ce1 15.0 landed
Fix one of the tests introduced in commit 52e4f0cd47.
- cfb4e209ec15 15.0 landed
Allow specifying row filters for logical replication of tables.
- 52e4f0cd472d 15.0 landed
Move scanint8() to numutils.c
- cfc7191dfea3 15.0 cited
Replace Test::More plans with done_testing
- 549ec201d613 15.0 cited
Reduce relcache access in WAL sender streaming logical changes
- 6ce16088bfed 15.0 cited
Small cleanups related to PUBLICATION framework code
- c9105dd3660f 15.0 cited
Add a view to show the stats of subscription workers.
- 8d74fc96db5f 15.0 cited
Allow publishing the tables of schema.
- 5a2832465fd8 15.0 cited
Doc: improve documentation of CREATE/ALTER SUBSCRIPTION.
- 1882d6cca161 15.0 cited
Add PublicationTable and PublicationRelInfo structs
- 0c6828fa987b 15.0 cited
Remove unused argument "txn" in maybe_send_schema().
- 93d573d86571 15.0 cited
Add prepare API support for streaming transactions in logical replication.
- 63cf61cdeb7b 15.0 cited
Unify PostgresNode's new() and get_new_node() methods
- 201a76183e20 15.0 cited
Use l*_node() family of functions where appropriate
- 2b00db4fb0c7 15.0 cited
Add support for prepared transactions to built-in logical replication.
- a8fd13cab0ba 15.0 cited
Restore the portal-level snapshot after procedure COMMIT/ROLLBACK.
- ef9480509622 11.13 cited
Rename a parse node to be more general
- 91d1f2d30210 14.0 landed
Remove unused column atttypmod from initial tablesync query
- 4ad31bb2ef25 14.0 landed
SEARCH and CYCLE clauses
- 3696a600e229 14.0 cited

Here are my review comments for v64-0001 (review of updates since v63-0001)

~~~

1. doc/src/sgml/ref/create_publication.sgml - typo?

+   The <literal>WHERE</literal> clause allows simple expressions that
don't have
+   user-defined functions, operators, non-immutable built-in functions.
+  </para>
+

I think there is a missing "or" after that Oxford comma.

e.g.
BEFORE
"... operators, non-immutable built-in functions."
AFTER
"... operators, or non-immutable built-in functions."

~~

2. commit message - typo

You said that the above text (review comment 1) came from the 0001
commit message, so please make the same fix to the commit message.

~~

3. src/backend/replication/logical/tablesync.c - redundant trailing ";"

+ /* Check for row filters. */
+ resetStringInfo(&cmd);
+ appendStringInfo(&cmd,
+ "SELECT DISTINCT pg_get_expr(pr.prqual, pr.prrelid)"
+ "  FROM pg_publication p"
+ "  LEFT OUTER JOIN pg_publication_rel pr"
+ "       ON (p.oid = pr.prpubid AND pr.prrelid = %u),"
+ "  LATERAL pg_get_publication_tables(p.pubname) GPT"
+ " WHERE GPT.relid = %u"
+ "   AND p.pubname IN ( %s );",
+ lrel->remoteid,
+ lrel->remoteid,
+ pub_names.data);

I think that trailing ";" of the SQL is not needed, and nearby SQL
execution code does not include one so maybe better to remove it for
consistency.

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