SQL400A - Temporary distributed result file &1 was created to contain join result

SQL400A
Message Text: Temporary distributed result file &1 was created to contain join result. Result file was directed
Cause Text: Query contains join criteria over a distributed file and a distributed join was performed in parallel. A temporary distributed result file was created to contain the results of the distributed join.
Recovery Text: For more information about processing of distributed files, refer to the Distributed Database Programming information.