Re: Support logical replication of DDLs

Ajin Cherian <itsajin@gmail.com>

From: Ajin Cherian <itsajin@gmail.com>

To: rajesh singarapu <rajesh.rs0541@gmail.com>

Cc: Zheng Li <zhengli10@gmail.com>, li jie <ggysxcq@gmail.com>, vignesh C <vignesh21@gmail.com>, Peter Smith <smithpb2250@gmail.com>, Dilip Kumar <dilipbalaut@gmail.com>, Alvaro Herrera <alvherre@alvh.no-ip.org>, "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>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>

Date: 2022-11-29T04:25:35Z

Lists: pgsql-hackers

Commits

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Add a run_as_owner option to subscriptions.
- 482675987bcd 16.0 cited
Refactor pgoutput_change().
- da324d6cd45b 16.0 cited
Print the correct aliases for DML target tables in ruleutils.
- df931e9ab35b 11.20 landed
- c8a5f1685fb7 15.3 landed
- 4efb4f0d4878 13.11 landed
- 3dd287c14fac 12.15 landed
- 393430f57544 16.0 landed
- 14345f3c6a7b 14.8 landed
Fix object identity string for transforms
- 9a312562314a 16.0 landed
Add grantable MAINTAIN privilege and pg_maintain role.
- 60684dd834a2 16.0 cited
Get rid of recursion-marker values in enum AlterTableType
- 840ff5f451cd 16.0 cited
Release cache tuple when no longer needed
- ed0fbc8e5ac9 15.0 cited
Empty search_path in logical replication apply worker and walsender.
- 11da97024abb 14.0 cited
Refactor format_type APIs to be more modular
- a26116c6cbf4 11.0 cited
Use wrappers of PG_DETOAST_DATUM_PACKED() more.
- 3a0d473192b2 10.0 cited

On Tue, Nov 29, 2022 at 1:29 PM rajesh singarapu
<rajesh.rs0541@gmail.com> wrote:
>
> One question,
>
> I understand that we create/enable triggers on create publication command flow.
> I am wondering how this works in case of logical replication using slots.
>
>
> thanks
> Rajesh
>
Rajesh,

The triggers functions when invoked write these ddl commands to WAL
and the logical decoding WAL sender which is
registered for that replication slot decodes the WAL logged DDL
commands and sends them as logical replication
messages to the subscriber side. The apply worker on the subscriber
side, then converts these messages to actual
DDL commands and executes them.

regards,
Ajin Cherian
Fujitsu Australia