Use a flat file, relational table, or source qualifier for a lookup source. When you create a Lookup transformation, you can create the lookup source from the following locations:
Relational source or target definition in the repository
Flat file source or target definition in the repository
Table or file that the Integration Service and
CDI-PC Client
machine can connect to
Source qualifier definition in a mapping
The lookup table can be a single table, or you can join multiple tables in the same database using a lookup SQL override. The Integration Service queries the lookup table or an in-memory cache of the table for all incoming rows into the Lookup transformation.
The Integration Service can connect to a lookup table using ODBC or native drivers. Configure native drivers for optimal performance.