Horton
Menu

Re: Pgoutput not capturing the generated columns

Amit Kapila <amit.kapila16@gmail.com>

View thread
From: Amit Kapila <amit.kapila16@gmail.com>
To: Masahiko Sawada <sawada.mshk@gmail.com>
Cc: Peter Smith <smithpb2250@gmail.com>, Shubham Khanna <khannashubham1197@gmail.com>, Rajendra Kumar Dangwal <dangwalrajendra888@gmail.com>, pgsql-hackers@lists.postgresql.org, euler@eulerto.com
Date: 2024-09-23T02:45:48Z
Lists: pgsql-hackers 
On Sat, Sep 21, 2024 at 3:19 AM Masahiko Sawada <sawada.mshk@gmail.com> wrote:
>
> On Thu, Sep 19, 2024 at 9:26 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
> >
> > >
> > > OK. Let me give some examples below to help understand this idea.
> > >
> > > Please correct me if these are incorrect.
> > >
> > > Examples, when publish_generated_columns=true:
> > >
> > > CREATE PUBLICATION pub1 FOR t1(a,b,gen2), t2 WITH
> > > (publish_generated_columns=true)
> > > t1 -> publishes a, b, gen2 (e.g. what column list says)
> > > t2 -> publishes c, d + ALSO gen1, gen2
> > >
> > > CREATE PUBLICATION pub1 FOR t1, t2(gen1) WITH (publish_generated_columns=true)
> > > t1 -> publishes a, b + ALSO gen1, gen2
> > > t2 -> publishes gen1 (e.g. what column list says)
> > >
> >
> > These two could be controversial because one could expect that if
> > "publish_generated_columns=true" then publish generated columns
> > irrespective of whether they are mentioned in column_list. I am of the
> > opinion that column_list should take priority the results should be as
> > mentioned by you but let us see if anyone thinks otherwise.
>
> I agree with Amit. We also publish t2's future generated column in the
> first example and t1's future generated columns in the second example.
>

Right, it would be good to have at least one test that shows future
generated columns also get published wherever applicable (like where
column_list is not given and publish_generated_columns is true).

-- 
With Regards,
Amit Kapila.

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.