From: Tom Lane <tgl@sss.pgh.pa.us>
To: Dean Rasheed <dean.a.rasheed@gmail.com>
cc: Tender Wang <tndrwang@gmail.com>,
        Duncan Sands <duncan.sands@deepbluecap.com>,
        pgsql-bugs@lists.postgresql.org
Subject: Re: Attribute of type record has wrong type error with MERGE ... WHEN
 NOT MATCHED BY SOURCE THEN DELETE
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Comments: In-reply-to Dean Rasheed <dean.a.rasheed@gmail.com>
	message dated "Mon, 10 Mar 2025 20:03:15 -0000"
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Date: Mon, 10 Mar 2025 16:08:46 -0400
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Dean Rasheed <dean.a.rasheed@gmail.com> writes:
> However, that's not quite the end of it -- preprocess_function_rtes()
> / inline_set_returning_function() can turn a function RTE into a
> subquery RTE, leading to a similar problem:

> create table foo (a int, b int);
> insert into foo values (1,2);
> create or replace function f() returns setof foo as
>   $$ select * from foo offset 0 $$ language sql stable;
> update foo set b = f.b from f() as f(a,b) where f.a = foo.a returning f;

> ERROR:  attribute 3 of type record has wrong type
> DETAIL:  Table has type record, but query expects foo.

Double ugh.  I guess we could get preprocess_function_rtes to
insert the appropriate relid ...

			regards, tom lane