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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: Rahila Syed <rahilasyed90@gmail.com>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>, Tomas Vondra <tomas.vondra@enterprisedb.com>, vignesh C <vignesh21@gmail.com>, Peter Smith <smithpb2250@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2021-09-28T04:01:33Z
Lists: pgsql-hackers 
On Mon, Sep 27, 2021 at 6:41 PM Rahila Syed <rahilasyed90@gmail.com> wrote:
>
>>
>>
>> I don't think there is one.  I think the latest is what I posted in
>> https://postgr.es/m/202109061751.3qz5xpugwx6w@alvherre.pgsql (At least I
>> don't see any reply from Rahila with attachments after that), but that
>> wasn't addressing a bunch of review comments that had been made; and I
>> suspect that Amit K has already committed a few conflicting patches
>> after that.
>>
> Yes, the v5 version of the patch attached by Alvaro is the latest one.
> IIUC, the review comments that are yet to be addressed apart from the ongoing grammar
> discussion, are as follows:
>
> 1. Behaviour on dropping a column from the table, that is a part of column filter.
> In the latest patch, the entire table is dropped from publication on dropping a column
> that is a part of the column filter. However, there is preference for another approach
> to drop just the column from the filter on DROP column CASCADE(continue to filter
> the other columns), and an error for DROP RESTRICT.
>

I am not sure if we can do this as pointed by me in one of the
previous emails [1]. I think additionally, you might want to take some
action if the replica identity is changed as requested in the same
email [1].

[1] - https://www.postgresql.org/message-id/CAA4eK1KCGF43pfLv8%2BmixcTMs%3DNkd6YdWL53LhiT1DvnuTg01g%40mail.gmail.com

-- 
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