MapReduce(-1) - -2:
Reduce Plan Empty
|   Store(DummyFil:DummyLdr) - --8512881738335808286
|   |
|   |---Union[tuple] - -6693653468874366867
|       |
|       |---Filter[tuple] - -8515950928528386562
|       |   |   |
|       |   |   Constant(true) - -913122466036599874
|       |   |
|       |   |---Load(DummyFil:DummyLdr) - --203604194309414000
|       |
|       |---Filter[tuple] - -8554221887998033529
|           |   |
|           |   Constant(true) - --3347320220748403847
|           |
|           |---Load(DummyFil:DummyLdr) - -5969405952749301492