Re: Support logical replication of DDLs

Hi,

> > Good catch. The reason for having isTopLevel in the condition is
> > because I haven't decided if a DDL statement inside a PL should
> > be replicated from the user point of view. For example, if I execute a
> > plpgsql function or a stored procedure which creates a table under the hood,
> > does it always make sense to replicate the DDL without running the same
> > function or stored procedure on the subscriber? It probably depends on
> > the specific
> > use case. Maybe we can consider making this behavior configurable by the user.
>
> But then this could be true for DML as well right? Like after
> replicating the function to the subscriber if we are sending the DML
> done by function then what's the problem in DDL. I mean if there is
> no design issue in implementing this then I don't think there is much
> point in blocking the same or even providing configuration for this.

Agreed. I'll unblock DDLs in functions/procedures and test it out. I
find out some DDLs in functions are replicated multiple times on the
subscriber while they should only be replicated once. Still trying to
figure out why.

>The patch no longer applies. The patch is a very good attempt, and I
>would also like to contribute if required.
>I have a few comments but will hold it till a rebased version is available.

Hi, Ajin. That'll be great! I'll rebase my github branch to master
head. In the meantime, this github branch still works
https://github.com/zli236/postgres/tree/ddl_replication

Regards,
Zheng