SETOF RECORD RETURN VALUE

Hi I am having some problem with function that returns SETOF RECORD

Here is my function:

CREATE OR REPLACE FUNCTION test_record(text) RETURNS SETOF RECORD AS
$BODY$


DECLARE
p_table_name ALIAS FOR $1;
temp_rec RECORD;
v_query text;

BEGIN 

v_query = 'SELECT * FROM ' || p_table_name; FOR temp_rec IN EXECUTE v_query
LOOPRETURN NEXT temp_rec;
END LOOP;

RETURN ;

END;

$BODY$ LANGUAGE 'plpgsql' VOLATILE;


And here is how I execute the function:
select * from test_record('field_list')

I have this error:

ERROR:  a column definition list is required for functions returning
"record"



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