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

From: Sutou Kouhei <kou(at)clear-code(dot)com>
To: sawada(dot)mshk(at)gmail(dot)com
Cc: v(dot)popolitov(at)postgrespro(dot)ru, zhjwpku(at)gmail(dot)com, michael(at)paquier(dot)xyz, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Make COPY format extendable: Extract COPY TO format implementations
Date: 2025-02-05 07:37:25
Message-ID: 20250205.163725.963329192546915298.kou@clear-code.com
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Hi,

In <CAD21AoDCH1io_dGtsmnmZ4bUWfdPhEUe_8VQNvi31+78Pt7KdQ(at)mail(dot)gmail(dot)com>
"Re: Make COPY format extendable: Extract COPY TO format implementations" on Tue, 4 Feb 2025 17:32:07 -0800,
Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:

> BTW we need to check if the return value type of the handler function
> is copy_handler.

Oh, can we do it without calling a function? It seems that
FmgrInfo doesn't have return value type information. Should
we read pg_catalog.pg_proc or something for it?

Thanks,
--
kou

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