asterixdb/asterix-app/src/test/resources/optimizerts/results_cbo/btree-index-selection/cast-default-null/cast-default-null-12.plan

-- DISTRIBUTE_RESULT  |PARTITIONED|
  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
    -- STREAM_PROJECT  |PARTITIONED|
      -- ASSIGN  |PARTITIONED|
        -- SORT_MERGE_EXCHANGE [$$48(ASC) ]  |PARTITIONED|
          -- STREAM_SELECT  |PARTITIONED|
            -- STREAM_PROJECT  |PARTITIONED|
              -- ASSIGN  |PARTITIONED|
                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                  -- DATASOURCE_SCAN (test.ds5)  |PARTITIONED|
                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                      -- EMPTY_TUPLE_SOURCE  |PARTITIONED|