Horton

Re: Support logical replication of DDLs

Amit Kapila <amit.kapila16@gmail.com>

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From: Amit Kapila <amit.kapila16@gmail.com>
To: shveta malik <shveta.malik@gmail.com>
Cc: "Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>, vignesh C <vignesh21@gmail.com>, Ajin Cherian <itsajin@gmail.com>, "Wei Wang (Fujitsu)" <wangw.fnst@fujitsu.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: 2023-04-21T09:16:51Z
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 Thu, Apr 20, 2023 at 6:09 PM shveta malik <shveta.malik@gmail.com> wrote:
>
>
> Few more comments, mainly for event_trigger.c  in the patch dated April17:
>
> 1)EventTriggerCommonSetup()
> +    pub_funcoid = LookupFuncName(pubfuncname, 0, NULL, true);
>
> This is the code where we have special handling for ddl-triggers. Here
> we are passing 'missing_ok' as true, so shouldn't we check pub_funcoid
> against 'InvalidOid' ?
>

I think so. However, I think this shouldn't be part of the first patch
as the first patch is only about deparsing. We should move this to DDL
publication patch or maybe a separate patch altogether. Another thing
is I feel it is better if this functionality is part of
filter_event_trigger().

>
> 2) EventTriggerTableInitWriteEnd()
>
> + if (stmt->objtype == OBJECT_TABLE)
> + {
> +    parent = currentEventTriggerState->currentCommand->parent;
> +    pfree(currentEventTriggerState->currentCommand);
> +    currentEventTriggerState->currentCommand = parent;
> + }
> + else
> + {
> +    MemoryContext oldcxt;
> +    oldcxt = MemoryContextSwitchTo(currentEventTriggerState->cxt);
> +    currentEventTriggerState->currentCommand->d.simple.address = address;
> +    currentEventTriggerState->commandList =
> +         lappend(currentEventTriggerState->commandList,
> +     currentEventTriggerState->currentCommand);
> +
> +     MemoryContextSwitchTo(oldcxt);
> + }
> +}
>
> It will be good to add some comments in the 'else' part. It is not
> very much clear what exactly we are doing here and for which scenario.
>

Yeah, that would be better. I feel the event trigger related changes
should be moved to a separate patch in itself.

-- 
With Regards,
Amit Kapila.