Mega Code Archive
A sample object type with a MAP member function
<![CDATA[
SQL>
SQL> CREATE OR REPLACE TYPE myType AUTHID CURRENT_USER IS OBJECT
2 ( my_number NUMBER
3 , CONSTRUCTOR FUNCTION myType RETURN SELF AS RESULT
4 , CONSTRUCTOR FUNCTION myType( my_number NUMBER )RETURN SELF AS RESULT
5 , MEMBER PROCEDURE print_instance_variable
6 , MAP MEMBER FUNCTION equals RETURN NUMBER )INSTANTIABLE NOT FINAL;
7 /
Type created.
SQL>
SQL> CREATE OR REPLACE TYPE BODY myType AS
2 CONSTRUCTOR FUNCTION myType
3 RETURN SELF AS RESULT IS
4 my_instance_number NUMBER := 0;
5 BEGIN
6 SELF.my_number := my_instance_number;
7 RETURN;
8 END;
9 CONSTRUCTOR FUNCTION myType( my_number NUMBER )
10 RETURN SELF AS RESULT IS
11 BEGIN
12 SELF.my_number := my_number;
13 RETURN;
14 END;
15 MEMBER PROCEDURE print_instance_variable IS
16 BEGIN
17 DBMS_OUTPUT.PUT_LINE('Instance Variable ['||SELF.my_number||']');
18 END;
19 MAP MEMBER FUNCTION equals
20 RETURN NUMBER IS
21 BEGIN
22 RETURN SELF.my_number;
23
24 END;
25
26 END;
27 /
Type body created.
SQL>
SQL>
SQL> DECLARE
2 obj1 myType := myType;
3 obj2 myType := myType(1);
4
5 BEGIN
6 obj1.print_instance_variable;
7
8 obj2.print_instance_variable;
9
10 IF obj1 = obj2 THEN
11 DBMS_OUTPUT.PUT_LINE('equal.');
12 ELSE
13 DBMS_OUTPUT.PUT_LINE('unequal.');
14 END IF;
15
16 END;
17 /
Instance Variable [0]
Instance Variable [1]
unequal.
PL/SQL procedure successfully completed.
]]>