CometColumnarToRow
+- CometSort
   +- CometColumnarExchange
      +- Project
         +-  Window [COMET: WindowExec is not fully compatible with Spark (Native WindowExec has known correctness issues). To enable it anyway, set spark.comet.operator.WindowExec.allowIncompatible=true. For more information, refer to the Comet Compatibility Guide (https://datafusion.apache.org/comet/user-guide/compatibility.html).]
            +- CometColumnarToRow
               +- CometSort
                  +- CometExchange
                     +- CometHashAggregate
                        +- CometExchange
                           +- CometHashAggregate
                              +- CometProject
                                 +- CometBroadcastHashJoin
                                    :- CometProject
                                    :  +- CometBroadcastHashJoin
                                    :     :- CometFilter
                                    :     :  +- CometScan [native_iceberg_compat] parquet spark_catalog.default.store_sales
                                    :     :        +- SubqueryBroadcast
                                    :     :           +- BroadcastExchange
                                    :     :              +- CometNativeColumnarToRow
                                    :     :                 +- CometProject
                                    :     :                    +- CometFilter
                                    :     :                       +- CometScan [native_iceberg_compat] parquet spark_catalog.default.date_dim
                                    :     +- CometBroadcastExchange
                                    :        +- CometProject
                                    :           +- CometFilter
                                    :              +- CometScan [native_iceberg_compat] parquet spark_catalog.default.item
                                    +- CometBroadcastExchange
                                       +- CometProject
                                          +- CometFilter
                                             +- CometScan [native_iceberg_compat] parquet spark_catalog.default.date_dim

Comet accelerated 24 out of 28 eligible operators (85%). Final plan contains 3 transitions between Spark and Comet.