Re: Make COPY format extendable: Extract COPY TO format implementations

On Sun, Dec 10, 2023 at 5:44 AM Sutou Kouhei <kou@clear-code.com> wrote:
>
> Hi,
>
> Thanks for reviewing our latest patch!
>
> In
>  <TY3PR01MB9889C9234CD220A3A7075F0DF589A@TY3PR01MB9889.jpnprd01.prod.outlook.com>
>   "RE: Make COPY format extendable: Extract COPY TO format implementations" on Sat, 9 Dec 2023 02:43:49 +0000,
>   "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com> wrote:
>
> > (I remember that this theme was talked at Japan PostgreSQL conference)
>
> Yes. I should have talked to you more at the conference...
> I will do it next time!
>
>
> Can we discuss how to proceed this improvement?
>
> There are 2 approaches for it:
>
> 1. Do the followings concurrently:
>    a. Implementing small changes that got a consensus and
>       merge them step-by-step
>       (e.g. We got a consensus that we need to extract the
>       current format related routines.)
>    b. Discuss design

It's preferable to make patches small for easy review. We can merge
them anytime before commit if necessary.

I think we need to discuss overall design about callbacks and how
extensions define a custom copy handler etc. It may require some PoC
patches. Once we have a consensus on overall design we polish patches
including the documentation changes and regression tests.

Regards,

--
Masahiko Sawada
Amazon Web Services: https://aws.amazon.com