title: System table with function's definitions in Postgresql
body: <p>I would like to make correction in triggers, but there are like 200-300 cases of this issue - far too much to do it manually. Is there any table with whole db code in Postgresql where I could just find all their definitions and correct them all at the same time?</p>
  
  <p>That's probably beginner question (I know there's table like that in Oracle, but I'm new to Postgresql) but I can't seem to find it neither in web nor on my own.</p>