Advanced Queuing - Oracle

General Features of Advanced Queuing
items orderitemlist_vartyp,
ccnumber varchar2(20),
order_date date);
create or replace type customer_typ_sh as object (
custno number,
name varchar2(100),
street varchar2(100),
city varchar2(30),
state varchar2(2),
zip number);
create or replace type book_typ_sh as object (
title varchar2(100),
authors varchar2(100),
ISBN varchar2(20),
price number);
create or replace type orderitem_typ_sh as object (
quantity number,
item book_typ,
subtotal number);
create or replace type orderitemlist_vartyp_sh as varray (20) of
orderitem_typ_sh;
The Overseas Shipping application uses a sys.XMLType attribute.
Creating Transformations
You can create transformations in the following ways:
Create a single PL/SQL function that returns an object of the target type or the
constructor of the target type.
This representation is preferable for simple transformations or transformations
that are not easily broken down into independent transformations for each
attribute.
execute dbms_transform.create_transformation(
schema => 'OE', name => 'OE2WS',
from_schema => 'OE', from_type => 'order_typ',
to_schema => 'WS', to_type => 'order_typ_sh',
transformation(
'WS.order_typ_sh(source.user_data.orderno,
source.user_data.status,
8-8 Oracle9i Application Developer’s Guide - Advanced Queuing