recurse in a single query

Hi list,

I'd like to know how to recurse on some elements into a single query

SELECT P.oid, P.proname, P.proowner, P.pronargs, P.proargtypes::int[],
T.typname AS "PROCRETURN" FROM pg_proc P INNER JOIN pg_type T ON
P.prorettype = T.oid WHERE pronamespace = 230741;

oid | proname | proowner | pronargs | proargtypes | PROCRETURN
--------+---------+----------+----------+-------------------+------------
230749 | whoami | 230738 | 0 | {} | oid
237125 | jyadd | 230738 | 2 | [0:1]={1700,1700} | numeric

The goal is to get {numeric,numeric} instead of {1700,1700} still with one
query (if possible?)

JY
--
You've got to pity New Mexico... so far from heaven and so close to Texas.