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SQL>
SQL> CREATE OR REPLACE TYPE address AS OBJECT
2 (line1 VARCHAR2(20),
3 line2 VARCHAR2(20),
4 city VARCHAR2(20),
5 state_code VARCHAR2(2),
6 zip VARCHAR2(13));
7 /
Type created.
SQL>
SQL> DECLARE
2 addressValue address;
3 BEGIN
4 IF (addressValue IS NULL) THEN
5
6 DBMS_OUTPUT.PUT_LINE('addressValue is atomically null ');
7
8 END IF;
9
10 IF (addressValue.line1 IS NULL) THEN
11
12 DBMS_OUTPUT.PUT_LINE('line1 is null ');
13
14 END IF;
15
16 addressValue :=address('27 Rd','A','E','NJ','00000');
17
18 addressValue :=NULL;
19
20 IF (addressValue IS NULL) THEN
21 DBMS_OUTPUT.PUT_LINE('addressValue is atomically null ');
22 END IF;
23
24 addressValue.line1 :='1 Road';
25
26 EXCEPTION WHEN ACCESS_INTO_NULL THEN
27
28 DBMS_OUTPUT.PUT_LINE('Access Into Null');
29 END;
30 /
addressValue is atomically null
line1 is null
addressValue is atomically null
Access Into Null
PL/SQL procedure successfully completed.
SQL>
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