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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
cc: Richard Guo <guofenglinux@gmail.com>, borz_off@cs.msu.su,
        PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>
Subject: Re: BUG #17579: 15beta2: strange error when trying to use MERGE
 statement as a CTE
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References: <20220811114020.li7sp32bxqsnlx7n@alvherre.pgsql>
Comments: In-reply-to Alvaro Herrera <alvherre@alvh.no-ip.org>
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Alvaro Herrera <alvherre@alvh.no-ip.org> writes:
> On 2022-Aug-11, Richard Guo wrote:
>> +1 to disallow it for now.

> This patch does that.

The parse error location seems quite oddly chosen.  Can you make
it point at the MERGE instead?  I think exprLocation(cte->ctequery)
might work, but not sure.

			regards, tom lane