Well what i mean by print out is that it should print out the old and new tuples on postgres terminal after the update is complete. I tried it with triggers and I got what I wanted. But my professor for some reason wants me to mess around with the source code :( Do you think it's possible? -- View this message in context: http://postgresql.1045698.n5.nabble.com/Modfying-source-code-to-read-tuples-before-and-after-UPDATE-how-to-tp3251651p3252085.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