Usage and Restrictions for Distributed Joins
The following usage guidelines and restrictions apply to distributed joins:
The source field for the distributed join must be based on a table in the business component’s data source.
The destination column of the distributed join must be a column mapped to the Id System Field.
Multiple join specifications are not supported for a distributed join. However, join constraints are supported.
Inner join is not supported for a distributed join.
Reverse navigation (for example, a call to go to the last record) is not supported when the fields from multiple data sources are active.
All fields in the sort specification must be from the same data source.
All fields in the named search specifications must be from the default data source.