HashAggregate
+- CometColumnarToRow
   +- CometColumnarExchange
      +- HashAggregate
         +- Project
            +- BroadcastHashJoin
               :- Project
               :  +- BroadcastHashJoin
               :     :- Project
               :     :  +- BroadcastHashJoin
               :     :     :- Filter
               :     :     :  +- ColumnarToRow
               :     :     :     +-  Scan parquet spark_catalog.default.web_sales [COMET: Native DataFusion scan does not support subqueries/dynamic pruning]
               :     :     :           +- SubqueryBroadcast
               :     :     :              +- BroadcastExchange
               :     :     :                 +- CometColumnarToRow
               :     :     :                    +- CometProject
               :     :     :                       +- CometFilter
               :     :     :                          +- CometNativeScan parquet spark_catalog.default.date_dim
               :     :     +- BroadcastExchange
               :     :        +- CometColumnarToRow
               :     :           +- CometProject
               :     :              +- CometFilter
               :     :                 +- CometNativeScan parquet spark_catalog.default.item
               :     +- BroadcastExchange
               :        +- Filter
               :           +- HashAggregate
               :              +- CometColumnarToRow
               :                 +- CometColumnarExchange
               :                    +- HashAggregate
               :                       +- Project
               :                          +- BroadcastHashJoin
               :                             :- Filter
               :                             :  +- ColumnarToRow
               :                             :     +-  Scan parquet spark_catalog.default.web_sales [COMET: Native DataFusion scan does not support subqueries/dynamic pruning]
               :                             :           +- ReusedSubquery
               :                             +- BroadcastExchange
               :                                +- CometColumnarToRow
               :                                   +- CometProject
               :                                      +- CometFilter
               :                                         +- CometNativeScan parquet spark_catalog.default.date_dim
               +- BroadcastExchange
                  +- CometColumnarToRow
                     +- CometProject
                        +- CometFilter
                           +- CometNativeScan parquet spark_catalog.default.date_dim

Comet accelerated 14 out of 38 eligible operators (36%). Final plan contains 8 transitions between Spark and Comet.