zhangstar333 commented on code in PR #13737:
URL: https://github.com/apache/doris/pull/13737#discussion_r1009133812
##########
be/src/vec/functions/function_running_difference.h:
##########
@@ -0,0 +1,124 @@
+#pragma once
+
+#include "vec/data_types/data_type.h"
+#include "vec/data_types/number_traits.h"
+#include "vec/data_types/data_type_date.h"
+#include "vec/data_types/data_type_number.h"
+#include "vec/data_types/data_type_time_v2.h"
+#include "vec/data_types/data_type_date_time.h"
+#include "common/status.h"
+#include "vec/common/assert_cast.h"
+#include "vec/functions/function.h"
+#include "vec/columns/column_array.h"
+#include "vec/columns/column_decimal.h"
+#include "vec/columns/column_nullable.h"
+#include "vec/columns/column_string.h"
+#include "vec/columns/columns_number.h"
+#include "vec/common/typeid_cast.h"
+#include "vec/functions/simple_function_factory.h"
+#include "vec/columns/column.h"
+#include "vec/data_types/data_type_nullable.h"
+
+namespace doris::vectorized {
+
+class FunctionRunningDifference : public IFunction {
+public:
+ static constexpr auto name = "running_difference";
+
+ static FunctionPtr create() { return
std::make_shared<FunctionRunningDifference>(); }
+
+ String get_name() const override { return name; }
+
+ size_t get_number_of_arguments() const override { return 1; }
+
+ bool use_default_implementation_for_nulls() const override { return false;
}
+
+ bool use_default_implementation_for_constants() const override { return
true; }
+
+ template <typename SrcFieldType>
+ using DstFieldType = typename
NumberTraits::ResultOfSubtraction<SrcFieldType, SrcFieldType>::Type;
Review Comment:
now seems it's could remove
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