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

Hi,

In <CAD21AoDU=bYRDDY8MzCXAfg4h9XTeTBdM-wVJaO1t4UcseCpuA(at)mail(dot)gmail(dot)com>
"Re: Make COPY format extendable: Extract COPY TO format implementations" on Mon, 17 Mar 2025 13:50:03 -0700,
Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:

> I think that built-in formats also need to have their handler
> functions. This seems to be a conventional way for customizable
> features such as tablesample and access methods, and we can simplify
> this function.

OK. 0008 in the attached v37 patch set does it.

> I think we need to update the documentation to describe how users can
> define the handler functions and what each callback function is
> responsible for.

I agree with it but we haven't finalized public APIs yet. Can
we defer it after we finalize public APIs? (Proposed public
APIs exist in 0003, 0006 and 0007.)

And could someone help (take over if possible) writing a
document for this feature? I'm not good at writing a
document in English... 0009 in the attached v37 patch set
has a draft of it. It's based on existing documents in
doc/src/sgml/ and *.h.

0001-0007 aren't changed from v36 patch set.

Thanks,
--
kou