-- SINK_WRITE  |PARTITIONED|
  -- RANDOM_MERGE_EXCHANGE  |PARTITIONED|
    -- STREAM_PROJECT  |PARTITIONED|
      -- ASSIGN  |PARTITIONED|
        -- STREAM_SELECT  |PARTITIONED|
          -- SUBPLAN  |PARTITIONED|
                  {
                    -- AGGREGATE  |LOCAL|
                      -- STREAM_SELECT  |LOCAL|
                        -- UNNEST  |LOCAL|
                          -- NESTED_TUPLE_SOURCE  |LOCAL|
                  }
            -- STREAM_PROJECT  |PARTITIONED|
              -- ASSIGN  |PARTITIONED|
                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                  -- DATASOURCE_SCAN  |PARTITIONED|
                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                      -- EMPTY_TUPLE_SOURCE  |PARTITIONED|