When you configure a mapping, you describe the flow of data from the source to the target.
A mapping defines reusable data flow logic that you can use in mapping tasks.
When you create a mapping, you define the Source, Target, and Lookup transformations to represent a Google BigQuery V2 object. Use the Mapping Designer in Data Integration to add the Source, Target, or Lookup transformations in the mapping canvas and configure the Google BigQuery V2 source, target, and lookup properties.