-- SINK_WRITE  |PARTITIONED|
  -- STREAM_PROJECT  |PARTITIONED|
    -- SORT_MERGE_EXCHANGE [$$5(ASC) ]  |PARTITIONED|
      -- STREAM_PROJECT  |PARTITIONED|
        -- STREAM_SELECT  |PARTITIONED|
          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
            -- BTREE_SEARCH  |PARTITIONED|
              -- ONE_TO_ONE_EXCHANGE  |LOCAL|
                -- STABLE_SORT [$$9(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|