-- DISTRIBUTE_RESULT  |PARTITIONED|
  -- SORT_MERGE_EXCHANGE [$$23(ASC) ]  |PARTITIONED|
    -- STABLE_SORT [$$23(ASC)]  |PARTITIONED|
      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
        -- STREAM_PROJECT  |PARTITIONED|
          -- STREAM_SELECT  |PARTITIONED|
            -- ASSIGN  |PARTITIONED|
              -- STREAM_PROJECT  |PARTITIONED|
                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                  -- DATASOURCE_SCAN (test.tenk)  |PARTITIONED|
                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                      -- EMPTY_TUPLE_SOURCE  |PARTITIONED|