My friend, thanks for your replay, however how to prove your view? -- View this message in context: http://postgresql.1045698.n5.nabble.com/Whether-the-function-exists-a-in-pgsql-table-or-not-tp4741670p4749963.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