I just bumped into this: postgres=# CREATE TABLE atable (id int4); CREATE TABLE postgres=# CREATE TABLE btable (id int4); CREATE TABLE postgres=# INSERT INTO atable VALUES (1),(2),(3); INSERT 0 3 postgres=# INSERT INTO btable VALUES (1),(2),(3),(1); INSERT 0 4 postgres=# SELECT * FROM atable WHERE id IN (SELECT d.id FROM atable d LEFT JOIN btable e ON d.id = e.id) ; id ---- 1 1 2 3 (4 rows)
On 8.3 this returns correctly just three rows: 1 2 3. -- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
