Get all functions depending on specified table in postgre

get_all_depending_functions.sql

/* HERE 
  table name is "my_table"
  \m and \M mark the beginning and end of a word in the regexp match.
*/

SELECT n.nspname AS schema_name
      ,p.proname AS function_name
      ,pg_get_function_arguments(p.oid) AS args
      ,pg_get_functiondef(p.oid) AS func_def
FROM   (SELECT oid, * FROM pg_proc p WHERE NOT p.proisagg) p
JOIN   pg_namespace n ON n.oid = p.pronamespace
WHERE  n.nspname !~~ 'pg_%'
AND    n.nspname <> 'information_schema'
AND    pg_get_functiondef(p.oid) ~ '\mmy_table\M';