diff --git a/include/sqlpp11/assignment_list.h b/include/sqlpp11/assignment_list.h
index 756a2436..3cf598fd 100644
--- a/include/sqlpp11/assignment_list.h
+++ b/include/sqlpp11/assignment_list.h
@@ -27,29 +27,13 @@
 #ifndef SQLPP_ASSIGNMENT_LIST_H
 #define SQLPP_ASSIGNMENT_LIST_H
 
-#include <vector>
 #include <sqlpp11/type_traits.h>
 #include <sqlpp11/detail/set.h>
 #include <sqlpp11/detail/serialize_tuple.h>
-#include <sqlpp11/detail/serializable.h>
+#include <sqlpp11/detail/serializable_list.h>
 
 namespace sqlpp
 {
-	namespace detail
-	{
-		template<typename Db>
-			struct dynamic_assignment_list
-			{
-				using type = std::vector<detail::serializable_t<Db>>;
-			};
-
-		template<>
-			struct dynamic_assignment_list<void>
-			{
-				using type = std::vector<noop>;
-			};
-	};
-
 	template<typename Database, template<typename> class ProhibitPredicate, typename... Assignments>
 		struct assignment_list_t
 		{
@@ -75,7 +59,7 @@ namespace sqlpp
 				{
 					static_assert(is_assignment_t<typename std::decay<Assignment>::type>::value, "set() arguments require to be assigments");
 					static_assert(not ProhibitPredicate<typename std::decay<Assignment>::type::column_type>::value, "set() argument must not be updated");
-					_dynamic_assignments.push_back(std::forward<Assignment>(assignment));
+					_dynamic_assignments.emplace_back(std::forward<Assignment>(assignment));
 				}
 
 			template<typename Db>
@@ -83,18 +67,11 @@ namespace sqlpp
 				{
 					os << " SET ";
 					detail::serialize_tuple(os, db, _assignments, ',');
-					bool first = sizeof...(Assignments) == 0;
-					for (const auto& assignment : _dynamic_assignments)
-					{
-						if (not first)
-							os << ',';
-						assignment.serialize(os, db);
-						first = false;
-					}
+					_dynamic_assignments.serialize(os, db, sizeof...(Assignments) == 0);
 				}
 
-			std::tuple<Assignments...> _assignments;
-			typename detail::dynamic_assignment_list<Database>::type _dynamic_assignments;
+			std::tuple<typename std::decay<Assignments>::type...> _assignments;
+			typename detail::serializable_list<Database> _dynamic_assignments;
 		};
 
 }
diff --git a/include/sqlpp11/detail/named_serializable.h b/include/sqlpp11/detail/named_serializable.h
index 45f0d383..1aaa7f17 100644
--- a/include/sqlpp11/detail/named_serializable.h
+++ b/include/sqlpp11/detail/named_serializable.h
@@ -38,7 +38,9 @@ namespace sqlpp
 		template<typename Db>
 			struct named_serializable_t
 			{
-				template<typename T>
+				template<typename T, 
+					typename std::enable_if<not std::is_same<typename std::decay<T>::type, named_serializable_t<Db>>::value, int>::type = 0 // prevent accidental overload for copy constructor
+						>
 					named_serializable_t(T&& t):
 						_impl(std::make_shared<_impl_t<typename std::decay<T>::type>>(std::forward<T>(t)))
 				{}
@@ -84,7 +86,7 @@ namespace sqlpp
 
 					std::string _get_name() const
 					{
-						T::_name_t::_get_name();
+						return T::_name_t::_get_name();
 					}
 
 					T _t;
diff --git a/include/sqlpp11/detail/serializable.h b/include/sqlpp11/detail/serializable.h
index 8746a20c..99c78454 100644
--- a/include/sqlpp11/detail/serializable.h
+++ b/include/sqlpp11/detail/serializable.h
@@ -38,7 +38,9 @@ namespace sqlpp
 		template<typename Db>
 			struct serializable_t
 			{
-				template<typename T>
+				template<typename T,
+					typename std::enable_if<not std::is_same<typename std::decay<T>::type, serializable_t<Db>>::value, int>::type = 0 // prevent accidental overload for copy constructor
+					>
 					serializable_t(T&& t):
 						_impl(std::make_shared<_impl_t<typename std::decay<T>::type>>(std::forward<T>(t)))
 				{}
diff --git a/include/sqlpp11/detail/serializable_list.h b/include/sqlpp11/detail/serializable_list.h
new file mode 100644
index 00000000..60aa2bdc
--- /dev/null
+++ b/include/sqlpp11/detail/serializable_list.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2013, Roland Bock
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ *   Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * 
+ *   Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SQLPP_SERIALIZABLE_LIST_H
+#define SQLPP_SERIALIZABLE_LIST_H
+
+#include <vector>
+#include <sqlpp11/detail/serializable.h>
+
+namespace sqlpp
+{
+	namespace detail
+	{
+		template<typename Db>
+			struct serializable_list
+			{
+				std::vector<detail::serializable_t<Db>> _serializables;
+
+				std::size_t size() const
+				{
+					return _serializables.size();
+				}
+
+				bool empty() const
+				{
+					return _serializables.empty();
+				}
+
+				template<typename Expr>
+				void emplace_back(Expr&& expr)
+				{
+					_serializables.emplace_back(std::forward<Expr>(expr));
+				}
+
+				void serialize(std::ostream& os, Db& db, bool first) const
+				{
+					for (const auto entry : _serializables)
+					{
+						if (not first)
+							os << ',';
+						entry.serialize(os, db);
+						first = false;
+					}
+				}
+
+				void serialize(std::ostream& os, Db& db, const std::string& separator, bool first) const
+				{
+					for (const auto entry : _serializables)
+					{
+						if (not first)
+							os << separator;
+						entry.serialize(os, db);
+						first = false;
+					}
+				}
+
+			};
+
+		template<>
+			struct serializable_list<void>
+			{
+				template<typename T>
+					void emplace_back(const T&) {}
+
+				constexpr std::size_t size() const
+				{
+					return 0;
+				}
+
+				constexpr bool empty() const
+				{
+					return true;
+				}
+
+				template<typename Db>
+					void serialize(std::ostream&, Db&, bool) const
+					{
+					}
+
+			};
+
+	}
+}
+
+#endif
diff --git a/include/sqlpp11/in.h b/include/sqlpp11/in.h
index 5653a3dc..9a864363 100644
--- a/include/sqlpp11/in.h
+++ b/include/sqlpp11/in.h
@@ -76,8 +76,8 @@ namespace sqlpp
 			template<typename Db>
 				void serialize(std::ostream& os, Db& db) const
 				{
-					static_assert(NotInverted and Db::_supports_in
-							or _inverted and Db::_supports_not_in, "in() and/or not_in() not supported by current database");
+					static_assert((NotInverted and Db::_supports_in)
+							or (_inverted and Db::_supports_not_in), "in() and/or not_in() not supported by current database");
 					_operand.serialize(os, db);
 					os << (_inverted ? " NOT IN(" : " IN(");
 					detail::serialize_tuple(os, db, _args, ',');
diff --git a/include/sqlpp11/insert_list.h b/include/sqlpp11/insert_list.h
index 78feb6e0..e7e02270 100644
--- a/include/sqlpp11/insert_list.h
+++ b/include/sqlpp11/insert_list.h
@@ -27,11 +27,10 @@
 #ifndef SQLPP_INSERT_LIST_H
 #define SQLPP_INSERT_LIST_H
 
-#include <vector>
 #include <sqlpp11/type_traits.h>
 #include <sqlpp11/detail/set.h>
 #include <sqlpp11/detail/serialize_tuple.h>
-#include <sqlpp11/detail/serializable.h>
+#include <sqlpp11/detail/serializable_list.h>
 
 namespace sqlpp
 {
@@ -47,18 +46,6 @@ namespace sqlpp
 					os << " DEFAULT VALUES";
 			}
 
-		template<typename Db>
-			struct dynamic_column_list
-			{
-				using type = std::vector<detail::serializable_t<Db>>;
-			};
-
-		template<>
-			struct dynamic_column_list<void>
-			{
-				using type = std::vector<noop>;
-			};
-
 		template<typename Column>
 			struct insert_column
 			{
@@ -107,8 +94,8 @@ namespace sqlpp
 				{
 					static_assert(is_assignment_t<typename std::decay<Assignment>::type>::value, "set() arguments require to be assigments");
 					static_assert(not ProhibitPredicate<typename std::decay<Assignment>::type>::value, "set() argument must not be used in insert");
-					_dynamic_columns.push_back(std::forward<typename Assignment::column_type>(assignment._lhs));
-					_dynamic_values.push_back(std::forward<typename Assignment::value_type>(assignment._rhs));
+					_dynamic_columns.emplace_back(detail::insert_column<typename Assignment::column_type>{std::forward<typename Assignment::column_type>(assignment._lhs)});
+					_dynamic_values.emplace_back(std::forward<typename Assignment::value_type>(assignment._rhs));
 				}
 
 			template<typename Db>
@@ -120,38 +107,22 @@ namespace sqlpp
 					}
 					else
 					{
+						constexpr bool first = sizeof...(Assignments) == 0;
+
 						os << " (";
 						detail::serialize_tuple(os, db, _columns, ',');
-						{
-							bool first = sizeof...(Assignments) == 0;
-							for (const auto column : _dynamic_columns)
-							{
-								if (not first)
-									os << ',';
-								column.serialize(os, db);
-								first = false;
-							}
-						}
+						_dynamic_columns.serialize(os, db, first);
 						os << ") VALUES (";
 						detail::serialize_tuple(os, db, _values, ',');
-						{
-							bool first = sizeof...(Assignments) == 0;
-							for (const auto column : _dynamic_values)
-							{
-								if (not first)
-									os << ',';
-								column.serialize(os, db);
-								first = false;
-							}
-						}
+						_dynamic_values.serialize(os, db, first);
 						os << ")";
 					}
 				}
 
 			std::tuple<detail::insert_column<typename Assignments::column_type>...> _columns;
 			std::tuple<typename Assignments::value_type...> _values;
-			typename detail::dynamic_column_list<Database>::type _dynamic_columns;
-			typename detail::dynamic_column_list<Database>::type _dynamic_values;
+			typename detail::serializable_list<Database> _dynamic_columns;
+			typename detail::serializable_list<Database> _dynamic_values;
 		};
 
 }
diff --git a/include/sqlpp11/is_null.h b/include/sqlpp11/is_null.h
index a9dc2d93..6da8b1ba 100644
--- a/include/sqlpp11/is_null.h
+++ b/include/sqlpp11/is_null.h
@@ -73,8 +73,8 @@ namespace sqlpp
 			template<typename Db>
 				void serialize(std::ostream& os, Db& db) const
 				{
-					static_assert(NotInverted and Db::_supports_is_null
-							or _inverted and Db::_supports_is_not_null, "is_null() and/or is_not_null() not supported by current database");
+					static_assert((NotInverted and Db::_supports_is_null)
+							or (_inverted and Db::_supports_is_not_null), "is_null() and/or is_not_null() not supported by current database");
 					_operand.serialize(os, db);
 					os << (_inverted ? " IS NOT NULL" : " IS NULL");
 				}
diff --git a/include/sqlpp11/select_expression_list.h b/include/sqlpp11/select_expression_list.h
index 27cb1ea7..f39b57c7 100644
--- a/include/sqlpp11/select_expression_list.h
+++ b/include/sqlpp11/select_expression_list.h
@@ -69,7 +69,7 @@ namespace sqlpp
 				void push_back(Expr&& expr)
 				{
 					_dynamic_expression_names.push_back(std::decay<Expr>::type::_name_t::_get_name());
-					_dynamic_expressions.push_back(std::forward<Expr>(expr));
+					_dynamic_expressions.emplace_back(std::forward<Expr>(expr));
 				}
 				void serialize(std::ostream& os, Db& db, bool first) const
 				{
diff --git a/include/sqlpp11/where.h b/include/sqlpp11/where.h
index 0edf896c..6c03f95f 100644
--- a/include/sqlpp11/where.h
+++ b/include/sqlpp11/where.h
@@ -28,12 +28,11 @@
 #define SQLPP_WHERE_H
 
 #include <ostream>
-#include <vector>
 #include <sqlpp11/select_fwd.h>
 #include <sqlpp11/expression.h>
 #include <sqlpp11/type_traits.h>
 #include <sqlpp11/detail/set.h>
-#include <sqlpp11/detail/serializable.h>
+#include <sqlpp11/detail/serializable_list.h>
 
 namespace sqlpp
 {
@@ -65,7 +64,7 @@ namespace sqlpp
 			void add(Expr&& expr)
 			{
 				static_assert(is_expression_t<typename std::decay<Expr>::type>::value, "invalid expression argument in where()");
-				_conditions.push_back(std::forward<Expr>(expr));
+				_conditions.emplace_back(std::forward<Expr>(expr));
 			}
 
 		void serialize(std::ostream& os, Db& db) const
@@ -75,16 +74,10 @@ namespace sqlpp
 
 			os << " WHERE ";
 			bool first = true;
-			for (const auto& condition : _conditions)
-			{
-				if (not first)
-					os << " AND ";
-				condition.serialize(os, db);
-				first = false;
-			}
+			_conditions.serialize(os, db, " AND ", true);
 		}
 
-		std::vector<detail::serializable_t<Db>> _conditions;
+		detail::serializable_list<Db> _conditions;
 	};
 
 }