dbms: fixed working of AggregateFunctionIf with min, max, any, anyLast [#CONV-8713].

dbms/include/DB/AggregateFunctions/AggregateFunctionAny.h

@@ -71,7 +71,10 @@ public:
 
 	void insertResultInto(ConstAggregateDataPtr place, IColumn & to) const
 	{
-		to.insert(data(place).value);
+		if (unlikely(data(place).value.isNull()))
+			to.insertDefault();
+		else
+			to.insert(data(place).value);
 	}
 };
 

dbms/include/DB/AggregateFunctions/AggregateFunctionAnyLast.h

@@ -58,7 +58,10 @@ public:
 
 	void insertResultInto(ConstAggregateDataPtr place, IColumn & to) const
 	{
-		to.insert(data(place).value);
+		if (unlikely(data(place).value.isNull()))
+			to.insertDefault();
+		else
+			to.insert(data(place).value);
 	}
 };
 

dbms/include/DB/AggregateFunctions/AggregateFunctionsMinMax.h

@@ -101,7 +101,10 @@ public:
 
 	void insertResultInto(ConstAggregateDataPtr place, IColumn & to) const
 	{
-		to.insert(data(place).value);
+		if (unlikely(data(place).value.isNull()))
+			to.insertDefault();
+		else
+			to.insert(data(place).value);
 	}
 };