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Re: Column Filtering in Logical Replication

Amit Kapila <amit.kapila16@gmail.com>

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From: Amit Kapila <amit.kapila16@gmail.com>
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Rahila Syed <rahilasyed90@gmail.com>, Tomas Vondra <tomas.vondra@enterprisedb.com>, Peter Smith <smithpb2250@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2021-09-06T03:23:39Z
Lists: pgsql-hackers 
On Sat, Sep 4, 2021 at 8:11 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
>
> On 2021-Sep-04, Amit Kapila wrote:
>
> > On Thu, Sep 2, 2021 at 2:19 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> > >
> > > On 2021-Sep-02, Rahila Syed wrote:
> > >
> > > > After thinking about this, I think it is best to remove the entire table
> > > > from publication,
> > > > if a column specified in the column filter is dropped from the table.
> > >
> > > Hmm, I think it would be cleanest to give responsibility to the user: if
> > > the column to be dropped is in the filter, then raise an error, aborting
> > > the drop.
> >
> > Do you think that will make sense if the user used Cascade (Alter
> > Table ... Drop Column ... Cascade)?
>
> ... ugh.  Since CASCADE is already defined to be a potentially-data-loss
> operation, then that may be acceptable behavior.  For sure the default
> RESTRICT behavior shouldn't do it, though.
>

That makes sense to me.

-- 
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: Explain about Column List feature.

  2. Doc: fix column list vs. replica identity rules.

  3. Prohibit combining publications with different column lists.

  4. Fix the check to limit sync workers.

  5. Wait for subscription to sync in t/031_column_list.sql

  6. Move prattrs to the pg_publication_rel section in docs

  7. Allow specifying column lists for logical replication

  8. Fix row filters with multiple publications

  9. Fix publish_as_relid with multiple publications

  10. Add some additional tests for row filters in logical replication.

  11. Add index on pg_publication_rel.prpubid

  12. Avoid using DefElemAction in AlterPublicationStmt

  13. Small cleanups related to PUBLICATION framework code

  14. Add PublicationTable and PublicationRelInfo structs

  15. Fix various concurrency issues in logical replication worker launching