BUG #17233: Incorrect behavior of DELETE command with bad subquery in WHERE clause
От | PG Bug reporting form |
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Тема | BUG #17233: Incorrect behavior of DELETE command with bad subquery in WHERE clause |
Дата | |
Msg-id | 17233-afb9d806aaa64b17@postgresql.org обсуждение исходный текст |
Ответы |
Re: BUG #17233: Incorrect behavior of DELETE command with bad subquery in WHERE clause
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Список | pgsql-bugs |
The following bug has been logged on the website: Bug reference: 17233 Logged by: Alexander Korolev Email address: lxndrkrlv@gmail.com PostgreSQL version: 14.0 Operating system: Windows Description: This SELECT command fails as expected: SELECT CTID FROM tmp1 INNER JOIN tmp2 ON tmp1.id = tmp2.id FOR UPDATE; -- ERROR: column "ctid" does not exist. But if I use same SELECT in WHERE clause of DELETE command DELETE FROM tmp1 WHERE CTID in ( SELECT CTID FROM tmp1 INNER JOIN tmp2 ON tmp1.id = tmp2.id FOR UPDATE); this command is executed without errors. Repro -------------------------------------------------------------------------------------------- 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'); INSERT INTO tmp2 (id, name) VALUES (1, 'aaa'), (2, 'bbb'), (3, 'eee'); SELECT ctid, * from tmp1; SELECT ctid, * from tmp2; /* Works as expected: ERROR: column "ctid" does not exist SELECT CTID FROM tmp1 INNER JOIN tmp2 ON tmp1.id = tmp2.id FOR UPDATE; */ // Executed without errors !!! DELETE FROM tmp1 WHERE CTID in ( SELECT CTID FROM tmp1 INNER JOIN tmp2 ON tmp1.id = tmp2.id FOR UPDATE ); SELECT * FROM tmp1; SELECT * FROM tmp2; -------------------------------------------------------------------------------------------- * in some cases, if tables is big, server process is hang. I can't make small reproducible example.
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