Call method from type

CREATE TABLE emp(
   emp t_emp,
   dept INTEGER
);


CREATE TYPE t_emp AS OBJECT (
   id INTEGER,
   name VARCHAR2(10),
   sal NUMBER(5, 2),
   hiredate DATE,
   MEMBER FUNCTION get_hire_date RETURN DATE
);
/

CREATE TYPE BODY t_emp AS
   MEMBER FUNCTION get_hire_date RETURN DATE IS
      v_date DATE;
   BEGIN
      SELECT hiredate INTO v_date FROM dual;
      RETURN v_date;
   END;
END;
/

INSERT INTO emp (emp,dept) VALUES (t_emp(1, 'Peter', 20, '17-DEC-1980'),50);

SQL> SELECT p.emp.get_hire_date() FROM emp p;

P.EMP.GET
---------
17-DEC-80

SQL>