Re: Support logical replication of DDLs

Alvaro Herrera <alvherre@alvh.no-ip.org>

From: Alvaro Herrera <alvherre@alvh.no-ip.org>

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

Cc: Zheng Li <zhengli10@gmail.com>, Amit Kapila <amit.kapila16@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, Japin Li <japinli@hotmail.com>, Dilip Kumar <dilipbalaut@gmail.com>, rajesh singarapu <rajesh.rs0541@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>

Date: 2022-06-23T12:43:56Z

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 →

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 2022-Jun-15, houzj.fnst@fujitsu.com wrote:

> On Wednesday, June 15, 2022 8:14 AM Zheng Li <zhengli10@gmail.com> wrote:

> > How does the deparser deparses CREATE FUNCTION STATEMENT? Will it
> > schema qualify
> > objects inside the function definition?
> 
> The current deparser doesn't schema qualify objects inside the function
> source as we won't know the schema of inner objects until the function is
> executed. The deparser will only schema qualify the objects around
> function declaration Like:
> 
> CREATE FUNCTION [public].test_func(i [pg_catalog].int4 ) RETURNS  [pg_catalog].int4 LANGUAGE plpgsql

Right, this is by design.  There is no way to deparse a function body --
as far as the backend is concerned, the body is just an opaque string.
That string is to be interpreted by the language handler only.

I don't know if it's possible to do different for non-core PLs, but I do
not think we have to worry about them in the Postgres implementation.

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/
"La victoria es para quien se atreve a estar solo"