5.13 Object Access Expressions

An object access expression specifies attribute reference and method invocation.


The column parameter can be an object or REF column. If you specify expr, then it must resolve to an object type.

When a type's member function is invoked in the context of a SQL statement, if the SELF argument is null, Oracle returns null and the function is not invoked.


The following example creates a table based on the sample oe.order_item_typ object type, and then shows how you would update and select from the object column attributes.

CREATE TABLE short_orders (
   sales_rep VARCHAR2(25), item order_item_typ);

UPDATE short_orders s SET sales_rep = 'Unassigned';

SELECT o.item.line_item_id, o.item.quantity FROM short_orders o;