remove sum for testing purpose

Author: huaxingao

spark/src/main/scala/org/apache/comet/serde/QueryPlanSerde.scala

@@ -209,7 +209,7 @@ object QueryPlanSerde extends Logging with ShimQueryPlanSerde with CometExprShim
       expr match {
         case agg: AggregateExpression =>
           agg.aggregateFunction match {
-            case _: Min | _: Max | _: Count | _: Sum =>
+            case _: Min | _: Max | _: Count =>
               Some(agg)
             case _ =>
               withInfo(windowExpr, "Unsupported aggregate", expr)

spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala

@@ -1510,13 +1510,7 @@ class CometExecSuite extends CometTestBase {
         SQLConf.ADAPTIVE_EXECUTION_ENABLED.key -> aqeEnabled) {
         withParquetTable((0 until 10).map(i => (i, 10 - i)), "t1") { // TODO: test nulls
           val aggregateFunctions =
-            List(
-              "COUNT(_1)",
-              "COUNT(*)",
-              "MAX(_1)",
-              "MIN(_1)",
-              "SUM(_1)"
-            ) // TODO: Test all the aggregates
+            List("COUNT(_1)", "COUNT(*)", "MAX(_1)", "MIN(_1)") // TODO: Test all the aggregates
 
           aggregateFunctions.foreach { function =>
             val queries = Seq(