You can create a connected Lookup transformation to perform a lookup on a Google BigQuery table. A connected Lookup transformation has a source qualifier as the lookup source.
When you configure a connected Lookup transformation, the lookup source and source qualifier are in a different connected from the Lookup transformation. The source and source qualifier are in a partial connected that contains no target. The PowerCenter Integration Service reads the source data in this connected and passes the data to the Lookup transformation to create the cache.
For more information, see the topic "Pipeline Lookups" in the