Re: Support logical replication of DDLs

On Fri, Apr 8, 2022 at 7:34 AM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> > For runtime conditions, one of the things you have mentioned in that
> > thread is to add schema name in the statement at the required places
> > which this patch deals with in a different way by explicitly sending
> > it along with the DDL statement.
>
> Hmm, ok.  The point of the JSON-blob route is that the publisher sends a
> command representation that can be parsed/processed/transformed
> arbitrarily by the subscriber using generic rules; it should be trivial
> to use a JSON tool to change schema A to schema B in any arbitrary DDL
> command, and produce another working DDL command without having to know
> how to write that command specifically.  So if I have a rule that
> "schema A there is schema B here", all DDL commands can be replayed with
> no further coding (without having to rely on getting the run-time
> search_path correct.)

Yeah, that was a really nice aspect of that approach.

-- 
Robert Haas
EDB: http://www.enterprisedb.com