Horton

Re: Support logical replication of DDLs

Ajin Cherian <itsajin@gmail.com>

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From: Ajin Cherian <itsajin@gmail.com>
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Peter Smith <smithpb2250@gmail.com>, vignesh C <vignesh21@gmail.com>, Zheng Li <zhengli10@gmail.com>, li jie <ggysxcq@gmail.com>, Dilip Kumar <dilipbalaut@gmail.com>, "houzj.fnst@fujitsu.com" <houzj.fnst@fujitsu.com>, Amit Kapila <amit.kapila16@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, Japin Li <japinli@hotmail.com>, rajesh singarapu <rajesh.rs0541@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2023-02-03T13:27:02Z
Lists: pgsql-hackers

Commits

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  1. Add a run_as_owner option to subscriptions.

  2. Refactor pgoutput_change().

  3. Print the correct aliases for DML target tables in ruleutils.

  4. Fix object identity string for transforms

  5. Add grantable MAINTAIN privilege and pg_maintain role.

  6. Get rid of recursion-marker values in enum AlterTableType

  7. Release cache tuple when no longer needed

  8. Empty search_path in logical replication apply worker and walsender.

  9. Refactor format_type APIs to be more modular

  10. Use wrappers of PG_DETOAST_DATUM_PACKED() more.

Attachments

There's a bug in this patch, where if there are multiple publications
that publish ddls,
then multiple event triggers will write multiple WAL records.
This will result in duplicate ddls statements being published.
This will also create multiple WAL records.
To avoid this,
I've added a fix in event_trigger invoking logic
(EventTriggerCommonSetup()) patch-6,
to check for duplicate publication ddl deparsing event trigger functions
and if there are duplicates, only the first event trigger function is
invoked and the rest ignored.
This way, even if there are multiple publications that publish ddls,
then only one set
event trigger functions are invoked.

regards,
Ajin Cherian
Fujitsu Australia