A federated database system enables users and applications to refer to multiple database management systems or databases within a single SQL statement. You can, for example, perform a UNION between a DB2(R) table and an Oracle view. A federated system includes a DB2 instance and database, and one or more data sources. Each data source consists of a non-DB2 DBMS and data.
In WebSphere(R) Information Integration Relational Wrappers, different wrappers are provided to allow your DB2 server to access different data sources. Wrappers are available for Oracle, Sybase, MS SQL Server, and Teradata. Wrappers for Informix(R) data sources are available as part of DB2 server products.
Before setting up WebSphere Information Integration Relational Wrappers, you must do two things:
It is recommended to test this connection using query tools of the data source vendor so that any problem encountered with server definitions can be isolated to the installation and configuration of either:
To set up WebSphere Information Integration Relational Wrappers for Oracle data sources, type the Oracle client installation directory or click [...] to select an existing directory. For example, if your Oracle client is installed in the /Oracle directory, enter /Oracle in the field.
The DB2 Setup wizard will install a wrapper for the data source and set up WebSphere Information Integration Relational Wrappers to access it.
You can set up WebSphere Information Integration Relational Wrappers for data sources later by using the DB2 Setup wizard or the Command Line Processor (CLP).
For more information on using WebSphere Information Integration Relational Wrappers to access non-DB2 data sources, see http://publib.boulder.ibm.com/infocenter/db2luw/v9/index.jsp?topic=/com.ibm.db2.ii.doc/admin/cfpint07.htm