Re: Support logical replication of DDLs

On Thu, Mar 17, 2022 at 2:47 AM Zheng Li <zhengli10@gmail.com> wrote:
>
> Hi,
>
> >If you don't mind, would you like to share the POC or the branch for this work?
>
> The POC patch is attached. It currently supports the following functionalities:

Thanks for sharing, I will look into it.

> >In such cases why don't we just log the table creation WAL for DDL
> >instead of a complete statement which creates the table and inserts
> >the tuple? Because we are already WAL logging individual inserts and
> >once you make sure of replicating the table creation I think the exact
> >data insertion on the subscriber side will be taken care of by the
> >insert WALs no?
>
> The table creation WAL and table insert WAL are available. The tricky
> part is how do we break down this command into two parts (a normal
> CREATE TABLE followed by insertions) either from the parsetree or the
> WALs. I’ll have to dig more on this.

I agree that this is a bit tricky, anyway I will also put more thoughts on this.

--
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com