You are right to the point, Tom. The datex is timestamp with time zone and the constraints were created as timestamp without time zone. As soon as I fixed that , it all started working. thank you! Helen -- View this message in context: http://postgresql.1045698.n5.nabble.com/constraint-partition-issue-tp4258004p4259853.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general