add microbenchmark for sum int (#2805)

Author: andygrove

spark/src/test/resources/tpcds-micro-benchmarks/agg_sum_integers_with_grouping.sql

@@ -0,0 +1,32 @@
+-- Licensed to the Apache Software Foundation (ASF) under one
+-- or more contributor license agreements.  See the NOTICE file
+-- distributed with this work for additional information
+-- regarding copyright ownership.  The ASF licenses this file
+-- to you under the Apache License, Version 2.0 (the
+-- "License"); you may not use this file except in compliance
+-- with the License.  You may obtain a copy of the License at
+--
+-- http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing,
+-- software distributed under the License is distributed on an
+-- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+-- KIND, either express or implied.  See the License for the
+-- specific language governing permissions and limitations
+-- under the License.
+
+select
+    ss_quantity,
+    sum(ss_sold_date_sk),
+    sum(ss_sold_time_sk),
+    sum(ss_item_sk),
+    sum(ss_customer_sk),
+    sum(ss_cdemo_sk),
+    sum(ss_hdemo_sk),
+    sum(ss_addr_sk),
+    sum(ss_store_sk),
+    sum(ss_promo_sk),
+    sum(ss_ticket_number),
+    sum(ss_quantity)
+from store_sales
+group by ss_quantity;

spark/src/test/scala/org/apache/spark/sql/benchmark/CometTPCDSMicroBenchmark.scala

@@ -61,6 +61,7 @@ object CometTPCDSMicroBenchmark extends CometTPCQueryBenchmarkBase {
     "agg_low_cardinality",
     "agg_sum_decimals_no_grouping",
     "agg_sum_integers_no_grouping",
+    "agg_sum_integers_with_grouping",
     "agg_stddev",
     "case_when_column_or_null",
     "case_when_scalar",