Method Max

be/src/exprs/aggregate-functions-ir.cc:1265–1268

template<typename T>
void AggregateFunctions::Max(FunctionContext*, const T& src, T* dst) {
  if (src.is_null) return;
  if (dst->is_null || src.val > dst->val) *dst = src;
}

void AggregateFunctions::InitNullString(FunctionContext* c, StringVal* dst) {
  dst->is_null = true;