SQL>
SQL> create or replace
2 type person as object(
3 first_name varchar2(100),
4 last_name varchar2(100) )
5 /
Type created.
SQL>
SQL> alter type person
2 add attribute dob date
3 cascade not including table data
4 /
Type altered.
SQL>
SQL> create or replace
2 type employee as object(
3 name person,
4 empno number,
5 hiredate date,
6 sal number,
7 commission number,
8 order member function match ( p_employee employee ) return integer )
9 /
Type created.
SQL>
SQL> create or replace
2 type body employee as
3 order member function match ( p_employee employee ) return integer is
4 begin
5 if self.empno > p_employee.empno then
6 return 1;
7 elsif self.empno < p_employee.empno then
8 return -1;
9 else
10 return 0;
11 end if;
12 end;
13 end;
14 /
Type body created.
SQL>
SQL>
SQL> declare
2 emp1 employee;
3 emp2 employee;
4 begin
5 emp1 := employee( null, 12345, '01-JAN-01', 100, 100 );
6 emp2 := employee( null, 67890, '01-JAN-01', 100, 100 );
7 if emp1 > emp2 then
8 dbms_output.put_line( 'Employee 1 is greater' );
9 end if;
10 if emp1 < emp2 then
11 dbms_output.put_line( 'Employee 2 is greater' );
12 end if;
13 if emp1 = emp2 then
14 dbms_output.put_line( 'Employees are equal' );
15 end if;
16 end;
17 /
PL/SQL procedure successfully completed.
SQL>
SQL> drop type employee;
Type dropped.
SQL>
SQL> drop type person;
Type dropped.
SQL>
SQL>