Patent attributes
Join operations may be selectively assigned from local data processing to remote data processing. Aggregation queries directed to distributed data sets may have query plans generated that include join operations. Some join operations may be executed locally while others may be assigned for remote execution at a remote data processing engine. Join operations may be identified and evaluated for remote execution according to a processing constraint for the remote data processing engine. For those join operations that satisfy the remote data processing engine, the query plan may be modified to assign the join operation for remote execution. A result for the aggregation query may be generated according to the modified query plan and the result sent in response to the aggregation query.