Add a test

src/AggregateFunctions/AggregateFunctionAvg.h

@@ -12,10 +12,10 @@
 
 namespace DB
 {
-template <class T>
+template <typename T>
 using DecimalOrVectorCol = std::conditional_t<IsDecimalNumber<T>, ColumnDecimal<T>, ColumnVector<T>>;
 
-template <class T> constexpr bool DecimalOrExtendedInt =
+template <typename T> constexpr bool DecimalOrExtendedInt =
     IsDecimalNumber<T>
     || std::is_same_v<T, Int128>
     || std::is_same_v<T, Int256>
@@ -25,7 +25,7 @@ template <class T> constexpr bool DecimalOrExtendedInt =
 /**
  * Helper class to encapsulate values conversion for avg and avgWeighted.
  */
-template <class Numerator, class Denominator>
+template <typename Numerator, typename Denominator>
 struct AvgFraction
 {
     Numerator numerator{0};
@@ -84,7 +84,7 @@ struct AvgFraction
  * @tparam Derived When deriving from this class, use the child class name as in CRTP, e.g.
  *         class Self : Agg<char, bool, bool, Self>.
  */
-template <class Numerator, class Denominator, class Derived>
+template <typename Numerator, typename Denominator, typename Derived>
 class AggregateFunctionAvgBase : public
         IAggregateFunctionDataHelper<AvgFraction<Numerator, Denominator>, Derived>
 {

tests/queries/0_stateless/01660_sum_ubsan.reference

@@ -1 +1,5 @@
 4233720368547758080
+384883669867978000
+4233720368547758080
+384883669867978000
+-88000000000000000000

tests/queries/0_stateless/01660_sum_ubsan.sql

@@ -1,3 +1,9 @@
 -- Aggregate function 'sum' allows overflow with two's complement arithmetics.
 -- This contradicts the standard SQL semantic and we are totally fine with it.
 SELECT sum(-8000000000000000000) FROM numbers(11);
+SELECT avg(-8000000000000000000) FROM numbers(11);
+
+SELECT sum(-8000000000000000000) FROM remote('127.0.0.{1,2,3,4,5,6,7,8,9,10,11}', system.one);
+SELECT avg(-8000000000000000000) FROM remote('127.0.0.{1,2,3,4,5,6,7,8,9,10,11}', system.one);
+
+SELECT sumKahan(-8000000000000000000) FROM numbers(11);