-- SINK_WRITE  |PARTITIONED|
  -- RANDOM_MERGE_EXCHANGE  |PARTITIONED|
    -- STREAM_PROJECT  |PARTITIONED|
      -- STREAM_SELECT  |PARTITIONED|
        -- ASSIGN  |PARTITIONED|
          -- ASSIGN  |PARTITIONED|
            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
              -- BTREE_SEARCH  |PARTITIONED|
                -- ONE_TO_ONE_EXCHANGE  |LOCAL|
                  -- STABLE_SORT [$$15(ASC)]  |LOCAL|
                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                      -- STREAM_PROJECT  |PARTITIONED|
                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                          -- INVERTED_INDEX_SEARCH  |PARTITIONED|
                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                              -- ASSIGN  |PARTITIONED|
                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|