fixup! is_join concept

Author: aalkin

Framework/Core/include/Framework/ASoA.h

@@ -3160,6 +3160,9 @@ constexpr auto join(Ts const&... t)
 template <typename T>
 concept is_join = framework::specialization_of_template<JoinFull, T>;
 
+template <typename T>
+constexpr bool is_soa_join_v = is_join<T>;
+
 template <typename... Ts>
 struct Concat : Table<o2::aod::Hash<"CONC"_h>, o2::aod::Hash<"CONC/0"_h>, o2::aod::Hash<"CONC"_h>, Ts...> {
   using base = Table<o2::aod::Hash<"CONC"_h>, o2::aod::Hash<"CONC/0"_h>, o2::aod::Hash<"CONC"_h>, Ts...>;