Re: Support logical replication of DDLs

Michael Paquier <michael@paquier.xyz>

From: Michael Paquier <michael@paquier.xyz>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: "Wei Wang (Fujitsu)" <wangw.fnst@fujitsu.com>, shveta malik <shveta.malik@gmail.com>, "Yu Shi (Fujitsu)" <shiy.fnst@fujitsu.com>, vignesh C <vignesh21@gmail.com>, "Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>, Ajin Cherian <itsajin@gmail.com>, Runqi Tian <runqidev@gmail.com>, Peter Smith <smithpb2250@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, li jie <ggysxcq@gmail.com>, Dilip Kumar <dilipbalaut@gmail.com>, Alvaro Herrera <alvherre@alvh.no-ip.org>, Masahiko Sawada <sawada.mshk@gmail.com>, Japin Li <japinli@hotmail.com>, rajesh singarapu <rajesh.rs0541@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Zheng Li <zhengli10@gmail.com>
Date: 2023-06-13T21:56:42Z
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. 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.

On Tue, Jun 13, 2023 at 06:49:42PM +0530, Amit Kapila wrote:
> We have to choose one of the approaches between 0001 and 0008. I feel
> we don't need an intermediate ObjTree representation as that adds
> overhead and an additional layer which is not required. As mentioned
> in my previous email I think as a first step we should merge 0001 and
> 0008 and avoid having an additional ObjTree layer unless you or others
> feel we need it. I think that will reduce the overall patch size and
> help us to focus on one of the approaches.

Similar impression here.  I found ObjTree actually confusing compared
to the JSON blobs generated.

> Surely, as suggested by
> you, we should also evaluate if we can generate this code for the
> various command types.

Thanks.
--
Michael