\set ECHO 0
psql:temporal.sql:14: NOTICE:  return type period is only a shell
psql:temporal.sql:17: NOTICE:  argument type period is only a shell
select '[2009-01-01, 2009-03-01)'::period @> '[2009-02-03, 2009-02-07)'::period;
 ?column? 
----------
 t
(1 row)

ROLLBACK;