asterixdb/asterix-app/src/test/resources/optimizerts/results_cbo/nested-open-index/btree-index/non-enforced-composite-key/12.plan

-- DISTRIBUTE_RESULT  |PARTITIONED|
  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
    -- STREAM_PROJECT  |PARTITIONED|
      -- ASSIGN  |PARTITIONED|
        -- SORT_MERGE_EXCHANGE [$$29(ASC) ]  |PARTITIONED|
          -- STABLE_SORT [$$29(ASC)]  |PARTITIONED|
            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
              -- STREAM_PROJECT  |PARTITIONED|
                -- STREAM_SELECT  |PARTITIONED|
                  -- ASSIGN  |PARTITIONED|
                    -- STREAM_PROJECT  |PARTITIONED|
                      -- ASSIGN  |PARTITIONED|
                        -- STREAM_PROJECT  |PARTITIONED|
                          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                            -- DATASOURCE_SCAN (test.TestOpen)  |PARTITIONED|
                              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|