9.10 Constraints on Objects

Oracle does not support constraints and defaults in type specifications. However, you can specify the constraints and defaults when creating the tables:

Example 9-15 Specifying Constraints on an Object Type When Creating a Table

CREATE TYPE customer_typ AS OBJECT(  
   cust_id INTEGER);
CREATE TYPE department_typ AS OBJECT(
   deptno INTEGER);
CREATE TABLE customer_tab OF customer_typ (  
   cust_id default 1 NOT NULL);

CREATE TABLE department_tab OF department_typ (  
   deptno PRIMARY KEY);

CREATE TABLE customer_tab1 (  
   cust customer_typ DEFAULT customer_typ(1)   
   CHECK (cust.cust_id IS NOT NULL),  
   some_other_column VARCHAR2(32));