Re: Added schema level support for publication.

From: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
To: Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>
Cc: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, "tanghy(dot)fnst(at)fujitsu(dot)com" <tanghy(dot)fnst(at)fujitsu(dot)com>, Greg Nancarrow <gregn4422(at)gmail(dot)com>, Ajin Cherian <itsajin(at)gmail(dot)com>, "houzj(dot)fnst(at)fujitsu(dot)com" <houzj(dot)fnst(at)fujitsu(dot)com>, Rahila Syed <rahilasyed90(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>
Subject: Re: Added schema level support for publication.
Date: 2021-08-14 10:52:46
Message-ID: CAA4eK1JcmF+rcD5MjcYbAHwPo1byZ6LBma9vtVKYzBSZLu=neA@mail.gmail.com
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On Sat, Aug 14, 2021 at 3:02 PM Peter Eisentraut
<peter(dot)eisentraut(at)enterprisedb(dot)com> wrote:
>
> On 13.08.21 04:59, Amit Kapila wrote:
> >> Even if we drop all tables added to the publication from it, 'pubkind'
> >> doesn't go back to 'empty'. Is that intentional behavior? If we do
> >> that, we can save the lookup of pg_publication_rel and
> >> pg_publication_schema in some cases, and we can switch the publication
> >> that was created as FOR SCHEMA to FOR TABLE and vice versa.
> >>
> > Do we really want to allow users to change a publication that is FOR
> > SCHEMA to FOR TABLE? I see that we don't allow to do that FOR TABLES.
> > postgres=# Alter Publication pub add table tbl1;
> > ERROR: publication "pub" is defined as FOR ALL TABLES
> > DETAIL: Tables cannot be added to or dropped from FOR ALL TABLES publications.
>
> I think the strict separation between publication-for-tables vs.
> publication-for-schemas is a mistake. Why can't I have a publication
> that publishes tables t1, t2, t3, *and* schemas s1, s2, s3. Also note
> that we have a pending patch to add sequences support to logical
> replication. So eventually, a publication will be able to contain a
> bunch of different objects of different kinds.
>

Valid point.

--
With Regards,
Amit Kapila.

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