CREATE OR REPLACE FUNCTION PUBLIC.dupa(x INTEGER)
 RETURNS SETOF character varying
 LANGUAGE plpgsql
AS $function$
DECLARE
  y int;
BEGIN
  y := 0;
  LOOP
    y := y+1;
    RETURN NEXT 'wytrych';
    EXIT WHEN y = x;

  END LOOP;
  RETURN;
END;
$function$