Re: Attribute of type record has wrong type error with MERGE ... WHEN NOT MATCHED BY SOURCE THEN DELETE

Postgresql version 17.4 (Ubuntu 17.4-1.pgdg24.10+2) on x86_64-pc-linux-gnu

To reproduce, execute the statements in the attached file cr.sql.  I get:

duncan=> \i cr.sql
CREATE TABLE
CREATE TABLE
CREATE VIEW
CREATE TABLE
COPY 1
COPY 2
COPY 1
psql:cr.sql:42: ERROR:  attribute 2 of type record has wrong type
DETAIL:  Table has type _country_or_region, but query expects record.

I attribute it to the "WHEN NOT MATCHED BY SOURCE THEN DELETE" part of the MERGE
as it doesn't happen if that part is left off.

commit d7d297f8449641bfd71750d04c302572a350052c
Author: Dean Rasheed <dean.a.rasheed@gmail.com>
Date:   Thu Oct 3 12:50:38 2024 +0100

    Fix incorrect non-strict join recheck in MERGE WHEN NOT MATCHED BY SOURCE.

    If a MERGE command contains WHEN NOT MATCHED BY SOURCE actions, the
    merge join condition is used by the executor to distinguish MATCHED
    from NOT MATCHED BY SOURCE cases. However, this qual is executed using
    the output from the join subplan node, which nulls the output from the
    source relation in the not matched case, and so the result may be
    incorrect if the join condition is "non-strict" -- for example,
Type "help" for help.

postgres=# \i /workspace/cr.sql
CREATE TABLE
CREATE TABLE
CREATE VIEW
CREATE TABLE
COPY 1
COPY 2
COPY 1
MERGE 0