sp help text in postgresql

1SELECT n.nspname AS schema
2      ,proname AS fname
3      ,proargnames AS args
4      ,t.typname AS return_type
5      ,d.description
6      ,pg_get_functiondef(p.oid) as definition
7--      ,CASE WHEN NOT p.proisagg THEN pg_get_functiondef(p.oid)
8--            ELSE 'pg_get_functiondef() can''t be used with aggregate functions'
9--       END as definition
10  FROM pg_proc p
11  JOIN pg_type t
12    ON p.prorettype = t.oid
13  LEFT OUTER
14  JOIN pg_description d
15    ON p.oid = d.objoid
16  LEFT OUTER
17  JOIN pg_namespace n
18    ON n.oid = p.pronamespace
19 WHERE NOT p.proisagg
20   AND n.nspname~'<$SCHEMA_NAME_PATTERN>'
21   AND proname~'<$FUNCTION_NAME_PATTERN>'
22