Hello all, I am working on a program where the solution set type is Tuple2<Long, Tuple2<Long, Double>>. At some point, I need to join with the solution set on the first field of the nested tuple (the Double), but I am getting an error that "the solution set may only be joined with using tuple field positions".
Since no other operations apart from join and cogroup with the solution set are allowed, I cannot "flatten" the data before joining. Any suggestions on a solution? What is the reason KeySelectors are not supported here? Thanks! Vasia.
