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Warehouse Dynamic Transparency

Oracle Tips by Burleson Consulting

The Data Warehouse Development Life Cycle

Distributed Oracle Data Warehouses

Warehouse Table Partitioning And Distributed Oracle

/* Re-populate the master table... */

SELECT customer_name, ‘:our_site’
FROM customer@:OUR_SITE
AS
INSERT INTO customer@master
VALUES customer_name, site_name;


Once populated, the master look-up can be accessed by any node and used to redirect the database query to the appropriate remote database for customer detail, as shown in Figure 9.11.

Figure 9.11 Dynamic location transparency.

Because of the dynamic substitution in the SQL, a common application can be made to access any customer in a federation, regardless of location, without making any changes to the application code.

Dynamic transparency is especially useful for situations where remote locations have "ownership" of data, but a corporate entity requires access to the data at a central location.


This is an excerpt from "High Performance Data Warehousing", copyright 1997.

If you like Oracle tuning, you may enjoy the book Oracle Tuning: The Definitive Reference , with over 900 pages of BC's favorite tuning tips & scripts. 

You can buy it directly from the publisher and save 30%, and get instant access to the code depot of Oracle tuning scripts.

 
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