HI, i have a following function., but not work.

CREATE or replace FUNCTION get_nombre(numeric,numeric,text) RETURNS setof
cumaalu AS '
SELECT cunomalu,cuappalu,cuapmalu FROM cumaalu
WHERE siempalu = $1 and
cusesalu = $2 and
curutalu = $3;
' LANGUAGE SQL;

the error say

PostgreSQL ha dicho: ERROR: function declared to return cumaalu does not
SELECT the right number of columns (49)
Your query:
CREATE FUNCTION get_nombre(numeric,numeric,text) RETURNS setof cumaalu AS '
SELECT cunomalu,cuappalu,cuapmalu FROM cumaalu
WHERE siempalu = $1 and
cusesalu = $2 and
curutalu = $3;
' LANGUAGE SQL

please any idea., i canṫ't use select * becose the table its very long.

thank