[GENERAL] Functions and procedures code!!!!

is there any way to get user's functions and procedures code from postgresql system catalog.   if a create a function something like   CREATE OR REPLACE FUNCTION myfunction() RETURNS INTEGER   AS' BEGIN my code ; END; ' LANGUAGE 'plpgsql'; --

Re: [GENERAL] ALTER TABLE...DROP CONSTRAINT

In post 7.2.x releases     ALTER TABLE tablename DROP CONSTRAINT is supported