SQL401D - Temporary distributed result table &1 was created because table &2 was directed

SQL401D
Message Text: Temporary distributed result table &1 was created because table &2 was directed
Cause Text: Temporary distributed result table was created to contain the intermediate results of the query. Data from a distributed table in the query was directed to other nodes.
Recovery Text: Generally, a table is directed when the join columns do not match the partitioning keys of the distributed table. When a table is directed, the query is processed in multiple steps and processed in parallel. A temporary distributed result file is required to contain the intermediate results for each step.

For more information about processing of distributed tables, refer to the Distributed Database Programming information.