[fix](planner)should keep at least one slot materialized in agg node (#26116)

fe/fe-core/src/main/java/org/apache/doris/analysis/AggregateInfo.java

@@ -905,7 +905,9 @@ public final class AggregateInfo extends AggregateInfoBase {
                 intermediateSlotDesc.setIsMaterialized(true);
             }
 
-            if (!slotDesc.isMaterialized()) {
+            if (!slotDesc.isMaterialized()
+                    && !(i == aggregateExprsSize - 1 && materializedSlots.isEmpty() && groupingExprs.isEmpty())) {
+                // we need keep at least one materialized slot in agg node
                 continue;
             }
 

regression-test/data/correctness_p0/test_agg_materialize.out

@@ -0,0 +1,4 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !select --
+3
+

regression-test/suites/correctness_p0/test_agg_materialize.groovy

@@ -0,0 +1,34 @@
+// 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.
+
+// The cases is copied from https://github.com/trinodb/trino/tree/master
+// /testing/trino-product-tests/src/main/resources/sql-tests/testcases/aggregate
+// and modified by Doris.
+
+suite("test_agg_materialize") {
+    sql "set enable_nereids_planner=false"
+    qt_select """with tb1 as (select * from (select * from (select 1 k1) as t lateral view explode([1,2,3]) tmp1 as e1)t)
+                    select count(*) from (select 1, count(*)
+                        from tb1
+                        where e1 in (1, 2)
+                        group by e1
+                        union all
+                        select 1, count(*)
+                        from tb1
+                        where e1 = 1)tttt
+                    ; """
+}