diff --git a/backends-clickhouse/src/main/scala/org/apache/gluten/execution/CHHashAggregateExecTransformer.scala b/backends-clickhouse/src/main/scala/org/apache/gluten/execution/CHHashAggregateExecTransformer.scala
index 1961fb0728a8..fcf6320f8ec4 100644
--- a/backends-clickhouse/src/main/scala/org/apache/gluten/execution/CHHashAggregateExecTransformer.scala
+++ b/backends-clickhouse/src/main/scala/org/apache/gluten/execution/CHHashAggregateExecTransformer.scala
@@ -56,6 +56,8 @@ object CHHashAggregateExecTransformer {
       aggExpr =>
         aggExpr.mode match {
           case Partial | PartialMerge =>
+            // For partial aggregate, the size of the result expressions of an aggregate expression
+            // is the same as aggBufferAttributes' length
             val aggBufferAttributesCount = aggExpr.aggregateFunction.aggBufferAttributes.length
             aggExpr.aggregateFunction match {
               case avg: Average =>
diff --git a/cpp-ch/local-engine/Parser/SerializedPlanParser.cpp b/cpp-ch/local-engine/Parser/SerializedPlanParser.cpp
index 9799933b3385..c71acd6b9b33 100644
--- a/cpp-ch/local-engine/Parser/SerializedPlanParser.cpp
+++ b/cpp-ch/local-engine/Parser/SerializedPlanParser.cpp
@@ -123,11 +123,15 @@ void adjustOutput(const DB::QueryPlanPtr & query_plan, const substrait::PlanRel
         NamesWithAliases aliases;
         auto cols = query_plan->getCurrentHeader().getNamesAndTypesList();
         if (cols.getNames().size() != static_cast<size_t>(root_rel.root().names_size()))
+        {
+            LOG_ERROR(getLogger("SerializedPlanParser"), "invalid query plan:\n{}", PlanUtil::explainPlan(*query_plan));
+            LOG_ERROR(getLogger("SerializedPlanParser"), "invalid substrait plan:\n{}", root_rel.DebugString());
             throw Exception(
                 ErrorCodes::LOGICAL_ERROR,
                 "Missmatch result columns size. plan column size {}, subtrait plan size {}.",
                 cols.getNames().size(),
                 root_rel.root().names_size());
+        }
         for (int i = 0; i < static_cast<int>(cols.getNames().size()); i++)
             aliases.emplace_back(NameWithAlias(cols.getNames()[i], root_rel.root().names(i)));
         actions_dag.project(aliases);