CREATE OR REPLACE FUNCTION tmp()
    RETURNS SETOF refcursor 
    LANGUAGE 'plpgsql'
    COST 100
    VOLATILE PARALLEL UNSAFE
    ROWS 1000

AS $BODY$
DECLARE
	ref1 refcursor := 'main'; 
BEGIN
	OPEN ref1 FOR
	SELECT * FROM crosstab(
					'SELECT	employee_id, MIN(order_date) as min_date, EXTRACT(MONTH FROM order_date)::INT as MONTH, COUNT(*)::INT as c
					FROM	ORDERS O
					GROUP BY EXTRACT(MONTH FROM order_date), employee_id
					ORDER BY 1',
					'SELECT DISTINCT EXTRACT(MONTH FROM order_date)::INT as MONTH
					 FROM	ORDERS O'
				);

RETURN NEXT ref1;
END;
$BODY$;


SELECT	*
INTO C
FROM	tmp();

OPEN ref1 FOR
	SELECT * FROM crosstab(