Hello, I can't find SQL definition for OVERLAPS operator so I don't know whether following expression's result (false) is appropriate behaviour: select ('2006-03-01'::TimeStamp, '2007-12-01'::TimeStamp) overlaps ('2007-12-01'::TimeStamp, 'Infinity'::TimeStamp) Can anyone confirm that ? In my understanding of "overlaps" it should result true, as those two periods overlaps in 2007-12-01. psql (PostgreSQL) 8.3.5 Best regards, ML -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general