Horton
Menu

Re: Column Filtering in Logical Replication

Peter Smith <smithpb2250@gmail.com>

View thread
From: Peter Smith <smithpb2250@gmail.com>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: "shiy.fnst@fujitsu.com" <shiy.fnst@fujitsu.com>, vignesh C <vignesh21@gmail.com>, Alvaro Herrera <alvherre@alvh.no-ip.org>, Peter Eisentraut <peter.eisentraut@enterprisedb.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2022-09-05T23:37:45Z
Lists: pgsql-hackers

Attachments

On Mon, Sep 5, 2022 at 8:46 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
>
> On Mon, Sep 5, 2022 at 3:46 PM Peter Smith <smithpb2250@gmail.com> wrote:
> >
> >
> > PSA v7.
> >
>
> For example, if additional columns are added to the table, then
> +    (after a <literal>REFRESH PUBLICATION</literal>) if there was a column list
> +    only those named columns will continue to be replicated.
>
> This looks a bit unclear to me w.r.t the refresh publication step. Why
> exactly you have used refresh publication in the above para? It is
> used to add new tables if any added to the publication, so not clear
> to me how it helps in this case. If that is not required then we can
> change it to: "For example, if additional columns are added to the
> table then only those named columns mentioned in the column list will
> continue to be replicated."
>

You are right - that REFRESH PUBLICATION was not necessary for this
example. The patch is modified to use your suggested text.

PSA v8

------
Kind Regards,
Peter Smith.
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: 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