asterixdb/asterix-app/src/test/resources/optimizerts/results/btree-index-selection/cast-default-null/cast-default-null-23.plan

-- DISTRIBUTE_RESULT  |PARTITIONED|
  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
    -- STREAM_PROJECT  |PARTITIONED|
      -- ASSIGN  |PARTITIONED|
        -- SORT_MERGE_EXCHANGE [$$58(ASC) ]  |PARTITIONED|
          -- STREAM_SELECT  |PARTITIONED|
            -- STREAM_PROJECT  |PARTITIONED|
              -- ASSIGN  |PARTITIONED|
                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                  -- BTREE_SEARCH (test.ds7.ds7)  |PARTITIONED|
                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                      -- STABLE_SORT [$$70(ASC)]  |PARTITIONED|
                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                          -- STREAM_PROJECT  |PARTITIONED|
                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                              -- BTREE_SEARCH (test.ds7.idx3)  |PARTITIONED|
                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
                                  -- ASSIGN  |PARTITIONED|
                                    -- EMPTY_TUPLE_SOURCE  |PARTITIONED|