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When you configure a relational lookup in a session, configure the connection for the lookup database on the Transformation View of the Mapping tab. Choose the Lookup transformation and configure the connection in the session properties for the transformation.
Choose from the following options to configure a connection for a relational Lookup transformation:
Choose a relational or application connection.
Configure a database connection using the $Source or $Target connection variable.
Configure the session parameter $DBConnection
Name
or $AppConnection
Name
, and define the session parameter in a parameter file.