Re: Support logical replication of DDLs

Japin Li <japinli@hotmail.com>

From: Japin Li <japinli@hotmail.com>

To: Zheng Li <zhengli10@gmail.com>

Cc: Dilip Kumar <dilipbalaut@gmail.com>, rajesh.rs0541@gmail.com, pgsql-hackers@lists.postgresql.org

Date: 2022-03-17T00:08:19Z

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

Hi, Zhang Li

On Thu, 17 Mar 2022 at 05:17, Zheng Li <zhengli10@gmail.com> wrote:
> Hi,
>
>>If you don't mind, would you like to share the POC or the branch for this work?
>
> The POC patch is attached. It currently supports the following functionalities:
> 1. Configure either database level or table level DDL replication via
> the CREATE PUBLICATION command.
>
> 2.Supports replication of DDL of the following types when database
> level DDL replication is turned on. Other less common DDL types could
> be added later.
> T_CreateSchemaStmt
> T_CreateStmt
> T_CreateForeignTableStmt
> T_AlterDomainStmt
> T_DefineStmt
> T_CompositeTypeStmt
> T_CreateEnumStmt
> T_CreateRangeStmt
> T_AlterEnumStmt
> T_ViewStmt
> T_CreateFunctionStmt
> T_AlterFunctionStmt
> T_CreateTrigStmt
> T_CreateDomainStmt
> T_CreateCastStmt
> T_CreateOpClassStmt
> T_CreateOpFamilyStmt
> T_AlterOpFamilyStmt
> T_AlterOperatorStmt
> T_AlterTypeStmt
> T_GrantStmt
> T_AlterCollationStmt
> T_AlterTableStmt
> T_IndexStmt
>
> 3.Supports replication of DDLs of the following types if only table
> level DDL replication is turned on.
> T_AlterTableStmt
> T_IndexStmt
>
> 4.Supports seamless DML replication of new tables created via DDL
> replication without having to manually running “ALTER SUBSCRIPTION ...
> REFRESH PUBLICATION" on the subscriber.
>

Great!  I think we can split the patch into several pieces (at least
implementation and test cases) for easier review.


+ * Simiarl to the generic logical messages, These DDL messages can be either
+ * transactional or non-transactional. Note by default DDLs in PostgreSQL are
+ * transactional.

There is a typo, s/Simiarl/Similar/.

--
Regrads,
Japin Li.
ChengDu WenWu Information Technology Co.,Ltd.