Re: BUG #17233: Incorrect behavior of DELETE command with bad subquery in WHERE clause

>
> This is not a bug:
>
>
> https://wiki.postgresql.org/wiki/FAQ#Why_doesn.27t_PostgreSQL_report_a_column_not_found_error_when_using_the_wrong_name_in_a_subquery.3F
>
> The virtual join table doesn’t have a ctid, only physical tables do, and
> the ctid of physical tables apparently aren’t propogated when they are
> joined.
>

Possibly this is not a bug, but this behavior is strange.
Also, this subquery has different behavior in SELECT and DELETE:

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DROP TABLE IF EXISTS pg_temp.tmp1;
DROP TABLE IF EXISTS pg_temp.tmp2;

CREATE TEMPORARY TABLE tmp1 (id int NOT NULL, name text);
CREATE TEMPORARY TABLE tmp2 (id int NOT NULL, name text);

INSERT INTO tmp1 (id, name) VALUES (1, 'aaa'), (2, 'bbb'), (3, 'ccc');
INSERT INTO tmp2 (id, name) VALUES (1, 'aaa');

-- select outputs all rows from tmp1
SELECT * FROM tmp1
WHERE CTID in (
    SELECT CTID
    FROM tmp1
    INNER JOIN tmp2 ON tmp1.id = tmp2.id FOR UPDATE
);

--delete affects only first row from tmp1
DELETE FROM tmp1
WHERE CTID in (
    SELECT CTID
    FROM tmp1
    INNER JOIN tmp2 ON tmp1.id = tmp2.id FOR UPDATE
) RETURNING *;
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