Wow. This is exactly what I'm looking for . The standard audit from here https://wiki.postgresql.org/wiki/Audit_trigger is not good enough for me - I want to audit only changed values and ignore all other ones. Thank you Felix! Regards, Yuri. -- View this message in context: http://postgresql.nabble.com/comparing-two-JSON-objects-in-9-3-tp5803617p5896917.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