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From: Tom Lane <tgl@sss.pgh.pa.us>
To: 1726002692@qq.com
cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #16946: It may be that the content of the document is missing
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References: <16946-ed641b30182df9de@postgresql.org>
Comments: In-reply-to PG Bug reporting form <noreply@postgresql.org>
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Date: Tue, 30 Mar 2021 09:57:35 -0400
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PG Bug reporting form <noreply@postgresql.org> writes:
> No information about the function pg_get_function_arg_default was found in
> the official manual.

It looks to me like that function is only meant as infrastructure
for an information_schema view, so leaving it out of the docs was
probably intentional.  There's lots of undocumented internal
functions ...

			regards, tom lane