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Re: Pgoutput not capturing the generated columns

Ajin Cherian <itsajin@gmail.com>

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From: Ajin Cherian <itsajin@gmail.com>
To: Peter Smith <smithpb2250@gmail.com>
Cc: vignesh C <vignesh21@gmail.com>, Amit Kapila <amit.kapila16@gmail.com>, Shubham Khanna <khannashubham1197@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, Rajendra Kumar Dangwal <dangwalrajendra888@gmail.com>, pgsql-hackers@lists.postgresql.org, euler@eulerto.com
Date: 2024-10-31T11:14:37Z
Lists: pgsql-hackers 
On Thu, Oct 31, 2024 at 9:55 PM Ajin Cherian <itsajin@gmail.com> wrote:

> I ran some tests and verified that the patch works with previous versions
> of PG12 and PG17
> 1. Verified with publications with generated columns and without generated
> columns on patched code and subscriptions on PG12 and PG17
> Observations:
>     a. If publication is created with publish_generated_columns=true or
> with generated columns mentioned explicitly, then tablesync will not copy
> generated columns but post tablesync the generated columns are replicated
>     b. Column list override (publish_generated_columns=false) behaviour
>
> These seem expected.
>
>
Currently the documentation does not talk about this behaviour, I suggest
this be added similar to how such a behaviour was documented when the
original row-filter version was committed.
Suggestion:
"If a subscriber is a pre-18 version, the initial table synchronization
won't publish generated columns even if they are defined in the publisher."

regards,
Ajin Cherian
Fujitsu Australia

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Doc: Generated column replication.

  2. Rename pubgencols_type to pubgencols in pg_publication.

  3. Doc: Fix column name in pg_publication catalog.

  4. Fix buildfarm failure introduced by commit e65dbc9927.

  5. Change publication's publish_generated_columns option type to enum.

  6. Fix \dRp+ output when describing publications with a lower server version.

  7. Replicate generated columns when 'publish_generated_columns' is set.

  8. Doc: Update the behavior of generated columns in Logical Replication.

  9. Replicate generated columns when specified in the column list.

  10. Doc: Generated columns are skipped for logical replication.