SQL list of all the user defined functions in a database

Question

I am looking for a SQL query that outputs the function definitions for all of the user defined functions in a database catalog.

I have found as far as

Answer 1

Similar to this solution: Query to list all stored procedures

SELECT * 
  FROM DIDS0100.INFORMATION_SCHEMA.ROUTINES
 WHERE ROUTINE_TYPE = 'FUNCTION' 
    AND LEFT(ROUTINE_NAME, 3) NOT IN ('fn_')