asterix-app/src/test/resources/optimizerts/results/btree-index/btree-secondary-42.plan

-- SINK_WRITE  |PARTITIONED|
  -- RANDOM_MERGE_EXCHANGE  |PARTITIONED|
    -- STREAM_PROJECT  |PARTITIONED|
      -- STREAM_SELECT  |PARTITIONED|
        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
          -- DATASOURCE_SCAN  |PARTITIONED|
            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|