Re: Logical Replication - behavior of ALTER PUBLICATION .. DROP TABLE and ALTER SUBSCRIPTION .. REFRESH PUBLICATION

On Tue, Jan 12, 2021 at 4:47 PM Li Japin <japinli@hotmail.com> wrote:
> IIUC the logical replication only replicate the tables in publication, I think
> when the tables that aren't in publication should not be replicated.
>
> Attached the patch that fixes it.  Thought?

With that change, we don't get the behaviour that's stated in the
document - "The ADD TABLE and DROP TABLE clauses will add and remove
one or more tables from the publication. Note that adding tables to a
publication that is already subscribed to will require a ALTER
SUBSCRIPTION ... REFRESH PUBLICATION action on the subscribing side in
order to become effective" -
https://www.postgresql.org/docs/devel/sql-alterpublication.html.

The publisher stops sending the tuples whenever the relation gets
dropped from the publication, not waiting until alter subscription ...
refresh publication on the subscriber.

With Regards,
Bharath Rupireddy.
EnterpriseDB: http://www.enterprisedb.com