diff --git a/include/sqlpp11/core/basic/join.h b/include/sqlpp11/core/basic/join.h
index 9fdc5fa1..79b9f4f3 100644
--- a/include/sqlpp11/core/basic/join.h
+++ b/include/sqlpp11/core/basic/join.h
@@ -28,6 +28,7 @@
 
 #include <sqlpp11/core/basic/join_fwd.h>
 #include <sqlpp11/core/basic/enable_join.h>
+#include <sqlpp11/core/type_traits.h>
 
 namespace sqlpp
 {
@@ -57,21 +58,6 @@ namespace sqlpp
     using type = sqlpp::detail::type_vector<Lhs, Rhs, Condition>;
   };
 
-  template <typename Lhs, typename JoinType, typename Rhs, typename Condition>
-  struct provided_tables_of<join_t<Lhs, JoinType, dynamic_t<Rhs>, Condition>>
-  {
-    using type = detail::make_joined_set_t<provided_tables_of_t<Lhs>, detail::type_set<dynamic_t<Rhs>>>;
-  };
-
-#warning: We need to quarantee that no tables are required by join and dynamic provision vs requirements need to be checked upon calling `on`.
-#warning: We should mix dynamic and optional into the provided_tables_of (instead of having separate traits for each).
-#warning: it might be great to search for missing tables and return something like `missing_table_for<column_t<SomeSpec>>`.
-
-  template<typename T>
-    struct is_dynamic : public std::false_type {};
-  template<typename T>
-    struct is_dynamic<dynamic_t<T>> : public std::true_type {};
-
   template <typename Lhs, typename JoinType, typename Rhs, typename Condition>
   struct provided_tables_of<join_t<Lhs, JoinType, Rhs, Condition>>
   {
@@ -83,8 +69,8 @@ namespace sqlpp
   {
     using type = typename std::conditional<
         is_dynamic<Rhs>::value,
-        provided_static_tables_of<Lhs>,
-        detail::type_vector_cat_t<provided_static_tables_of<Lhs>, provided_static_tables_of<Rhs>>>::type;
+        provided_static_tables_of_t<Lhs>,
+        detail::type_vector_cat_t<provided_static_tables_of_t<Lhs>, provided_static_tables_of_t<Rhs>>>::type;
   };
 
   template <typename Lhs, typename JoinType, typename Rhs, typename Condition>
@@ -141,7 +127,6 @@ namespace sqlpp
   }
 
 #warning: Verify that the Expr does not require tables other than Lhs, Rhs
-  //and detail::make_joined_set_t<provided_tables_of_t<Lhs>, provided_tables_of_t<Rhs>>::is_superset_of<required_tables_of_t<Expr>::value
   template <typename Expr, typename StaticTableTypeVector, typename AllTableTypeVector>
   struct are_table_requirements_satisfied
       : std::integral_constant<bool,
diff --git a/include/sqlpp11/core/basic/join_fwd.h b/include/sqlpp11/core/basic/join_fwd.h
index 180cdf8b..ff2c2106 100644
--- a/include/sqlpp11/core/basic/join_fwd.h
+++ b/include/sqlpp11/core/basic/join_fwd.h
@@ -30,7 +30,7 @@
 #include <sqlpp11/core/query/dynamic.h>
 #include <sqlpp11/core/type_traits.h>
 #include <sqlpp11/core/compat/type_traits.h>
-#include <sqlpp11/core/detail/type_set.h>
+#include <sqlpp11/core/detail/type_vector.h>
 
 namespace sqlpp
 {
@@ -69,9 +69,9 @@ namespace sqlpp
   template <typename Lhs, typename Rhs>
   using check_join_args =
       sqlpp::enable_if_t<is_table<Lhs>::value and is_table<remove_dynamic_t<Rhs>>::value and
-                         required_tables_of_t<Lhs>::size::value == 0 and required_tables_of_t<Rhs>::size::value == 0 and
-                         detail::is_disjunct_from<detail::make_name_of_set_t<provided_tables_of_t<Lhs>>,
-                                                  detail::make_name_of_set_t<provided_tables_of_t<Rhs>>>::value>;
+                         required_tables_of_t<Lhs>::empty() and required_tables_of_t<Rhs>::empty() and
+                         sqlpp::detail::transform_t<provided_tables_of_t<Lhs>, make_char_sequence>::contains_none(
+                             sqlpp::detail::transform_t<provided_tables_of_t<Rhs>, make_char_sequence>{})>;
 
   template <typename Lhs, typename Rhs, typename = check_join_args<Lhs, Rhs>>
   auto join(Lhs lhs, Rhs rhs) -> pre_join_t<Lhs, inner_join_t, Rhs>;
diff --git a/include/sqlpp11/core/basic/table.h b/include/sqlpp11/core/basic/table.h
index 19128f10..62ddeeaa 100644
--- a/include/sqlpp11/core/basic/table.h
+++ b/include/sqlpp11/core/basic/table.h
@@ -31,7 +31,7 @@
 #include <sqlpp11/core/basic/table_alias.h>
 #include <sqlpp11/core/basic/all_of.h>
 #include <sqlpp11/core/basic/column.h>
-#include <sqlpp11/core/detail/type_set.h>
+#include <sqlpp11/core/detail/type_vector.h>
 #include <sqlpp11/core/basic/join.h>
 
 namespace sqlpp
@@ -66,7 +66,7 @@ namespace sqlpp
   template <typename TableSpec>
   struct provided_tables_of<table_t<TableSpec>>
   {
-    using type = sqlpp::detail::type_set<table_t<TableSpec>>;
+    using type = sqlpp::detail::type_vector<table_t<TableSpec>>;
   };
 
   template <typename TableSpec>
diff --git a/include/sqlpp11/core/clause/from.h b/include/sqlpp11/core/clause/from.h
index c3e5e0e2..a58ac405 100644
--- a/include/sqlpp11/core/clause/from.h
+++ b/include/sqlpp11/core/clause/from.h
@@ -76,7 +76,6 @@ namespace sqlpp
       "from() argument is a pre join, please use an explicit on() condition or unconditionally()");
   SQLPP_PORTABLE_STATIC_ASSERT(assert_from_table_t, "from() argument has to be a table or join expression");
   SQLPP_PORTABLE_STATIC_ASSERT(assert_from_dependency_free_t, "at least one table depends on another table in from()");
-  SQLPP_PORTABLE_STATIC_ASSERT(assert_from_no_duplicates_t, "at least one duplicate table name detected in from()");
 
   template <typename Table>
   struct check_from
@@ -84,10 +83,8 @@ namespace sqlpp
     using type = static_combined_check_t<
         static_check_t<not is_pre_join_t<Table>::value, assert_from_not_pre_join_t>,
         static_check_t<is_table<Table>::value, assert_from_table_t>,
-        static_check_t<required_tables_of_t<Table>::size::value == 0, assert_from_dependency_free_t>,
-        static_check_t<provided_tables_of_t<Table>::size::value ==
-                           detail::make_name_of_set_t<provided_tables_of_t<Table>>::size::value,
-                       assert_from_no_duplicates_t>>;
+        static_check_t<required_tables_of_t<Table>::size::value == 0, assert_from_dependency_free_t>
+        >;
   };
 
   template <typename Table>
diff --git a/include/sqlpp11/core/detail/type_set.h b/include/sqlpp11/core/detail/type_set.h
index 27b7665b..cd93b1fd 100644
--- a/include/sqlpp11/core/detail/type_set.h
+++ b/include/sqlpp11/core/detail/type_set.h
@@ -260,21 +260,5 @@ namespace sqlpp
     template <template <typename> class Transformation, typename T>
     using transform_set_t = typename transform_set<Transformation, T>::type;
 
-    // workaround for msvc bug https://connect.microsoft.com/VisualStudio/feedback/details/2173198
-    template <typename T>
-    struct make_name_of_set
-    {
-      static_assert(wrong_t<make_name_of_set>::value, "invalid argument for make_name_of_set");
-    };
-
-    template <typename... E>
-    struct make_name_of_set<type_set<E...>>
-    {
-      using type =
-          make_type_set_t<make_char_sequence<sizeof(sqlpp::name_tag_of_t<E>::name), sqlpp::name_tag_of_t<E>::name>...>;
-    };
-
-    template <typename T>
-    using make_name_of_set_t = typename make_name_of_set<T>::type;
   }  // namespace detail
 }  // namespace sqlpp
diff --git a/include/sqlpp11/core/detail/type_vector.h b/include/sqlpp11/core/detail/type_vector.h
index c727fafa..4f699940 100644
--- a/include/sqlpp11/core/detail/type_vector.h
+++ b/include/sqlpp11/core/detail/type_vector.h
@@ -48,6 +48,12 @@ namespace sqlpp
         return ::sqlpp::logic::all<contains<X>()...>::value;
       }
 
+      template <typename... X>
+      static constexpr bool contains_none(type_vector<X...>)
+      {
+        return ::sqlpp::logic::none<contains<X>()...>::value;
+      }
+
       static constexpr size_t size()
       {
         return sizeof...(T);
diff --git a/include/sqlpp11/core/name/char_sequence.h b/include/sqlpp11/core/name/char_sequence.h
index ad256aa5..6280a348 100644
--- a/include/sqlpp11/core/name/char_sequence.h
+++ b/include/sqlpp11/core/name/char_sequence.h
@@ -45,8 +45,13 @@ namespace sqlpp
     using type = char_sequence<s[i]...>;
   };
 
-  template <std::size_t N, const char* Input>
-  using make_char_sequence =
-      typename make_char_sequence_impl<N, Input, ::sqlpp::make_index_sequence<N - 1>>::type;
+  template <typename T>
+  struct make_char_sequence
+      : make_char_sequence_impl<sizeof(sqlpp::name_tag_of_t<T>::name), sqlpp::name_tag_of_t<T>::name, ::sqlpp::make_index_sequence<sizeof(sqlpp::name_tag_of_t<T>::name) - 1>>
+  {
+  };
+
+  template <typename T>
+  using make_char_sequence_t = typename make_char_sequence<T>::type;
 
 }  // namespace sqlpp
diff --git a/include/sqlpp11/core/query/statement.h b/include/sqlpp11/core/query/statement.h
index d52373be..3af5b9d8 100644
--- a/include/sqlpp11/core/query/statement.h
+++ b/include/sqlpp11/core/query/statement.h
@@ -77,7 +77,7 @@ namespace sqlpp
 
       using _all_required_ctes = detail::make_joined_set_t<required_ctes_of<Policies>...>;
       using _all_provided_ctes = detail::make_joined_set_t<provided_ctes_of<Policies>...>;
-      using _all_required_tables = detail::make_joined_set_t<required_tables_of_t<Policies>...>;
+      using _all_required_tables = detail::type_vector_cat_t<required_tables_of_t<Policies>...>;
       using _all_provided_tables = detail::type_vector_cat_t<provided_tables_of_t<Policies>...>;
       //using _all_provided_outer_tables = detail::make_joined_set_t<provided_optional_tables_of_t<Policies>...>;
       using _all_provided_aggregates = detail::make_joined_set_t<provided_aggregates_of<Policies>...>;
diff --git a/include/sqlpp11/core/type_traits.h b/include/sqlpp11/core/type_traits.h
index 624f0279..6caffaf9 100644
--- a/include/sqlpp11/core/type_traits.h
+++ b/include/sqlpp11/core/type_traits.h
@@ -82,14 +82,19 @@ namespace sqlpp
   template <typename T>
   struct can_be_null : public is_optional<value_type_of_t<T>> {};
 
-#warning: remove this
   template <typename T>
-  struct is_not_cpp_bool_t
+  struct dynamic_t;
+
+  template <typename T>
+  struct is_dynamic : public std::false_type
+  {
+  };
+
+  template <typename T>
+  struct is_dynamic<dynamic_t<T>> : public std::true_type
   {
-    static constexpr bool value = not std::is_same<T, bool>::value;
   };
 
-  //
   template <typename L, typename R>
   struct values_are_comparable
       : public std::integral_constant<bool,
@@ -102,7 +107,6 @@ namespace sqlpp
   {
   };
 
-
   template<typename T>
     struct result_value {};
 
diff --git a/include/sqlpp11/core/type_traits/tables_of.h b/include/sqlpp11/core/type_traits/tables_of.h
index 1ac73a30..1dfc3f49 100644
--- a/include/sqlpp11/core/type_traits/tables_of.h
+++ b/include/sqlpp11/core/type_traits/tables_of.h
@@ -28,11 +28,10 @@
 
 #include <sqlpp11/core/type_traits/nodes_of.h>
 #include <sqlpp11/core/detail/type_vector.h>
-#include <sqlpp11/core/detail/type_set.h>
 
 namespace sqlpp
 {
-  // required_tables_of determines the type_set of tables referenced by columns within within T.
+  // required_tables_of determines the type_vector of tables referenced by columns within within T.
   // column_t or other structs that might reference a table shall specialize this template to indicate their table
   // requirement.
   // Dynamic parts of a query shall wrap their required tables in dynamic_t.
@@ -69,7 +68,7 @@ namespace sqlpp
 #warning: need type tests...
   //static_assert(required_tables_of_t<int>::size::value == 0, "");
 
-  // provided_tables_of determines the type_set of tables provided by the query clause, e.g. by FROM.
+  // provided_tables_of determines the type_vector of tables provided by the query clause, e.g. by FROM.
   // Provided tables can be wrapped in dynamic_t if they are provided through a dynamic join.
   // table_t, cte_ref_t, or other structs that might provide a table in a query need to specialize this template.
   template <typename T>
diff --git a/tests/core/serialize/basic/join.cpp b/tests/core/serialize/basic/join.cpp
index d4e4c378..a692092c 100644
--- a/tests/core/serialize/basic/join.cpp
+++ b/tests/core/serialize/basic/join.cpp
@@ -65,6 +65,7 @@ int main(int, char* [])
 
 #warning: Need to add tests with 3 tables
 
+#warning: Need to add tests with sub selects
 #warning: Need to add tests with CTEs
   return 0;
 }