asterix-app/src/test/resources/optimizerts/results/unnest-to-join_01.plan

-- SINK_WRITE  |UNPARTITIONED|
  -- STREAM_PROJECT  |UNPARTITIONED|
    -- ONE_TO_ONE_EXCHANGE  |UNPARTITIONED|
      -- HYBRID_HASH_JOIN [$$0][$$1]  |UNPARTITIONED|
        -- ONE_TO_ONE_EXCHANGE  |UNPARTITIONED|
          -- UNNEST  |UNPARTITIONED|
            -- EMPTY_TUPLE_SOURCE  |UNPARTITIONED|
        -- ONE_TO_ONE_EXCHANGE  |UNPARTITIONED|
          -- UNNEST  |UNPARTITIONED|
            -- EMPTY_TUPLE_SOURCE  |UNPARTITIONED|