CREATE OR REPLACE FUNCTION call_rsvp_sip() RETURNS call_rsvp_sip AS '
DECLARE
   pbx_t ast_pbx%ROWTYPE;
   user_t ast_user%ROWTYPE;
BEGIN
   SELECT INTO pbx_t pbx_max_trunks, curr_calls FROM ast_pbx WHERE lower(name)="lmadsen";
   SELECT INTO user_t sip_maxoutbound, sip_out_calls FROM ast_user WHERE lower(user_name)="lmadsen" AND lower(pbx)="telcel";
   RETURN pbx_t.pbx_max_trunks || pbx_t.curr_calls || user_t.sip_maxoutbound || user_t.sip_out_calls;
END;
' LANGUAGE PLPGSQL;




CREATE TYPE call_rsvp_sip AS
   (pbx_max varchar(3),
    pbx_use int4,
    trunk_max int2,
    trunk_use int4);



Columns definately match up for the column types in the CREATE TYPE