Merge branch 'release/0.30'

Conflicts:
	CMakeLists.txt
	examples/CMakeLists.txt
	examples/select.cpp
	include/sqlpp11/interpret_tuple.h
	include/sqlpp11/type_traits.h

.clang-format

@@ -0,0 +1,53 @@
+Language:        Cpp
+AccessModifierOffset: -2
+ConstructorInitializerIndentWidth: 4
+AlignEscapedNewlinesLeft: true
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AlwaysBreakTemplateDeclarations: true
+AlwaysBreakBeforeMultilineStrings: false
+BreakBeforeBinaryOperators: false
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: false
+BinPackParameters: false
+ColumnLimit:     160
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+DerivePointerAlignment: false
+ExperimentalAutoDetectBinPacking: false
+IndentCaseLabels: true
+IndentWrappedFunctionNames: false
+IndentFunctionDeclarationAfterType: false
+MaxEmptyLinesToKeep: 1
+KeepEmptyLinesAtTheStartOfBlocks: false
+NamespaceIndentation: All
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: false
+PenaltyBreakBeforeFirstCallParameter: 1
+PenaltyBreakComment: 300
+PenaltyBreakString: 1000
+PenaltyBreakFirstLessLess: 120
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 200
+PointerAlignment: Left
+SpacesBeforeTrailingComments: 2
+Cpp11BracedListStyle: true
+Standard:        Cpp11
+IndentWidth:     2
+TabWidth:        2
+UseTab:          Never
+BreakBeforeBraces: Allman
+SpacesInParentheses: false
+SpacesInAngles:  false
+SpaceInEmptyParentheses: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: true
+SpaceBeforeAssignmentOperators: true
+ContinuationIndentWidth: 4
+CommentPragmas:  '^ IWYU pragma:'
+ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]
+SpaceBeforeParens: ControlStatements
+DisableFormat:   false

.travis.yml

@@ -13,12 +13,20 @@ notifications:
    on_failure: always
 
 before_install:
+  # install boost 1.50 (headers only), travis currently offers 1.46 and 1.48
+  - wget http://sourceforge.net/projects/boost/files/boost/1.50.0/boost_1_50_0.tar.bz2/download -O /tmp/boost.tar.bz2
+  - mkdir -p temp
+  - cd temp
+  - tar jxf /tmp/boost.tar.bz2 boost_1_50_0/boost # extract headers only
+  - sudo mkdir -p /usr/local/include/
+  - sudo ln -s $PWD/boost_1_50_0/boost /usr/local/include
+  - cd ..
+  #install g++-4.8
   - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
   - sudo apt-get update
   - if [ "$CXX" = "g++" ]; then sudo apt-get install g++-4.8; fi
   - if [ "$CXX" = "g++" ]; then export CXX="g++-4.8" CC="gcc-4.8"; fi
 
-
 install:
   - "mkdir -p $TRAVIS_BUILD_DIR/build/scripts"
   - "cd $TRAVIS_BUILD_DIR/build/scripts"

CMakeLists.txt

@@ -1,4 +1,4 @@
-# Copyright (c) 2013-2014, Roland Bock
+# Copyright (c) 2013-2015, Roland Bock
 # All rights reserved.
 # 
 # Redistribution and use in source and binary forms, with or without modification,
@@ -36,7 +36,7 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
 	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall ${CMAKE_CXX_FLAGS}")
 endif ()
-set(CMAKE_CXX_FLAGS "-Wconversion -Wpedantic ${CMAKE_CXX_FLAGS}")
+set(CMAKE_CXX_FLAGS "-Wconversion -Wpedantic -Wshadow ${CMAKE_CXX_FLAGS}")
 
 set(include_dir "${PROJECT_SOURCE_DIR}/include")
 file(GLOB_RECURSE sqlpp_headers "${include_dir}/*.h")

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2013-2014, Roland Bock
+Copyright (c) 2013-2015, Roland Bock
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,

connector_api/bind_result.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

connector_api/connection.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

connector_api/interpreter.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

connector_api/prepared_statement.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

examples/CMakeLists.txt

@@ -1,9 +1,9 @@
 
 macro (build arg)
 	# Add headers to sources to enable file browsing in IDEs
-	include_directories("${CMAKE_SOURCE_DIR}/tests")
+	include_directories("${CMAKE_CURRENT_SOURCE_DIR}/../tests")
-	add_executable("Sqlpp11Example${arg}" "${arg}.cpp" ${sqlpp_headers} "${CMAKE_SOURCE_DIR}/tests/MockDb.h" "${CMAKE_CURRENT_LIST_DIR}/Sample.h")
+	add_executable("Sqlpp11Example${arg}" "${arg}.cpp" ${sqlpp_headers} "${CMAKE_CURRENT_SOURCE_DIR}/../tests/MockDb.h" "${CMAKE_CURRENT_LIST_DIR}/Sample.h")
-	add_test("${arg}" "${CMAKE_BINARY_DIR}/examples/Sqlpp11Example${arg}")
+	add_test("${arg}" "Sqlpp11Example${arg}")
 endmacro ()
 
 #build(sample)
@@ -11,6 +11,13 @@ build(insert)
 build(update)
 build(remove)
 build(select)
+find_package(Boost 1.50)
+if(Boost_FOUND)
+  MESSAGE(${Boost_INCLUDE_DIRS})
+  include_directories(${Boost_INCLUDE_DIRS})
+  build(ppgen)
+endif()
+
 
 #find_package(PythonInterp REQUIRED)
 

examples/Sample.h

@@ -3,6 +3,7 @@
 
 #include <sqlpp11/table.h>
 #include <sqlpp11/column_types.h>
+#include <sqlpp11/char_sequence.h>
 
 namespace test
 {
@@ -10,9 +11,10 @@ namespace test
   {
     struct Id
     {
-      struct _name_t
+      struct _alias_t
       {
-        static constexpr const char* _get_name() { return "id"; }
+        static constexpr const char _literal[] =  "id";
+        using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
         template<typename T>
         struct _member_t
           {
@@ -25,9 +27,10 @@ namespace test
     };
     struct Name
     {
-      struct _name_t
+      struct _alias_t
       {
-        static constexpr const char* _get_name() { return "name"; }
+        static constexpr const char _literal[] =  "name";
+        using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
         template<typename T>
         struct _member_t
           {
@@ -40,9 +43,10 @@ namespace test
     };
     struct Feature
     {
-      struct _name_t
+      struct _alias_t
       {
-        static constexpr const char* _get_name() { return "feature"; }
+        static constexpr const char _literal[] =  "feature";
+        using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
         template<typename T>
         struct _member_t
           {
@@ -60,9 +64,10 @@ namespace test
                TabPerson_::Name,
                TabPerson_::Feature>
   {
-    struct _name_t
+    struct _alias_t
     {
-      static constexpr const char* _get_name() { return "tab_person"; }
+      static constexpr const char _literal[] =  "tab_person";
+      using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
       template<typename T>
       struct _member_t
       {
@@ -76,9 +81,10 @@ namespace test
   {
     struct Id
     {
-      struct _name_t
+      struct _alias_t
       {
-        static constexpr const char* _get_name() { return "id"; }
+        static constexpr const char _literal[] =  "id";
+        using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
         template<typename T>
         struct _member_t
           {
@@ -91,9 +97,10 @@ namespace test
     };
     struct Name
     {
-      struct _name_t
+      struct _alias_t
       {
-        static constexpr const char* _get_name() { return "name"; }
+        static constexpr const char _literal[] =  "name";
+        using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
         template<typename T>
         struct _member_t
           {
@@ -106,9 +113,10 @@ namespace test
     };
     struct Fatal
     {
-      struct _name_t
+      struct _alias_t
       {
-        static constexpr const char* _get_name() { return "fatal"; }
+        static constexpr const char _literal[] =  "fatal";
+        using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
         template<typename T>
         struct _member_t
           {
@@ -126,9 +134,10 @@ namespace test
                TabFeature_::Name,
                TabFeature_::Fatal>
   {
-    struct _name_t
+    struct _alias_t
     {
-      static constexpr const char* _get_name() { return "tab_feature"; }
+      static constexpr const char _literal[] =  "tab_feature";
+      using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
       template<typename T>
       struct _member_t
       {

examples/TabSample.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

examples/insert.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Roland Bock
+ * Copyright (c) 2014-2015 Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification, 

examples/ppgen.cpp

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2014-2015, niXman (i dot nixman dog gmail dot com)
+ * 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.
+ */
+
+#if 0 // syntax example
+SQLPP_DECLARE_TABLE(
+	(table, \
+		 SQLPP_DROP_IF_EXISTS \
+		,SQLPP_CREATE_IF_NOT_EXISTS \
+		,SQLPP_ENGINE("InnoDB") \
+		,SQLPP_CHARACTER_SET("utf-8") \
+		,SQLPP_COMMENT("table comments") \
+	)
+	,
+	(id, int, SQLPP_NOT_NULL, SQLPP_PRIMARY_KEY, SQLPP_AUTO_INCREMENT)
+	(name, varchar(64), SQLPP_NOT_NULL, SQLPP_INDEX("name_index"), SQLPP_DEFAULT("any name"))
+	(age, int, SQLPP_NOT_NULL, SQLPP_INDEX("age_index"), SQLPP_UNIQUE, SQLPP_COMMENT("some comments"))
+)
+#endif
+
+#include <sqlpp11/sqlpp11.h>
+#include <sqlpp11/ppgen.h>
+
+#include "MockDb.h"
+
+SQLPP_DECLARE_TABLE(
+	(tab_person)
+	,
+	(id     , int         , SQLPP_AUTO_INCREMENT)
+	(name   , varchar(255), SQLPP_NOT_NULL      )
+	(feature, int         , SQLPP_NOT_NULL      )
+)
+
+SQLPP_DECLARE_TABLE(
+	(tab_feature)
+	,
+	(id   , int         , SQLPP_AUTO_INCREMENT)
+	(name , varchar(255), SQLPP_NULL          )
+	(fatal, bool        , SQLPP_NOT_NULL      )
+)
+
+int main() {
+	MockDb db;
+	tab_person::tab_person   p;
+	tab_feature::tab_feature f;
+
+	db(insert_into(f).set(f.name = "loves c++", f.fatal = false));
+
+	//db(insert_into(f).set(f.nahme = "loves c++", f.fatal = false));
+
+	//db(insert_into(f).set(f.name == "loves c++", f.fatal = false));
+
+	//db(insert_into(f).set(f.name = "loves c++", f.fatal = "false"));
+
+	//db(insert_into(p).set(f.name = "loves c++", f.fatal = false));
+
+	//db(insert_into(f).set(f.name = "loves c++", p.feature = 7));
+
+	//db(insert_into(f).set(f.id = 42, f.name = "loves c++", f.fatal = false));
+
+	//db(insert_into(f).set(f.name = "loves c++"));
+
+
+	db(insert_into(f).default_values());
+
+	auto i = insert_into(p).columns(p.name, p.feature);
+	i.values.add(p.name = "Roland", p.feature = 1);
+	i.values.add(p.name = "Zaphod", p.feature = sqlpp::default_value);
+	db(i);
+
+
+	auto pi = db.prepare(insert_into(p).set(p.name = parameter(f.name), p.feature = parameter(p.feature)));
+	pi.params.name = "likes java";
+	pi.params.feature = true;
+
+	db(pi);
+}

examples/remove.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Roland Bock
+ * Copyright (c) 2014-2015 Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification, 

examples/sample.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Roland Bock
+ * Copyright (c) 2014-2015 Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification, 

examples/select.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Roland Bock
+ * Copyright (c) 2014-2015 Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification, 
@@ -34,6 +34,9 @@
 #include "MockDb.h"
 #include <sqlpp11/sqlpp11.h>
 
+static constexpr bool some_condition = true;
+static constexpr bool some_other_condition = false;
+
 SQLPP_ALIAS_PROVIDER(cheesecake)
 
 MockDb db;
@@ -91,8 +94,8 @@ int main()
 	
 	
 
-#if !0
+#if 0
-	auto s = select(all_of(p)) 
+	auto s = select(p.id, p.name, f.id.as(cheesecake)) 
 				      .from(p, f)
 						  .where(p.name == any(select(f.name)
 										               .from(f)
@@ -103,12 +106,32 @@ int main()
 							.limit(3).offset(7);
 
 	auto x = s.as(sqlpp::alias::x);
-	for (const auto& row : db(select(p.id, x.name)
+	for (const auto& row : db(select(p.id, p.name, all_of(x).as(x))
-				.from(p.join(x).on(p.feature == x.feature))
+				.from(p.join(x).on(p.feature == x.cheesecake))
 				.where(true)))
 	{
 		int64_t id = row.id;
 		std::string name = row.name;
+		std::string x_name = row.x.name;
+		int cheesecake = row.x.cheesecake;
+	}
+#endif
+
+
+
+#if !0
+	auto dysel = dynamic_select(db).dynamic_columns(p.name).from(p).dynamic_where();
+
+	if (some_condition)
+		dysel.selected_columns.add(p.feature);
+
+	if (some_other_condition)
+		dysel.where.add(p.id > 17);
+
+	for (const auto& row : db(dysel))
+	{
+		std::string name = row.name;
+		std::string feature = row.at("feature");
 	}
 #endif
 
@@ -129,7 +152,5 @@ int main()
 
 
 
-
-
 
 }

examples/update.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Roland Bock
+ * Copyright (c) 2014-2015 Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification, 

include/sqlpp11/alias.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -36,12 +36,12 @@ namespace sqlpp
 		struct expression_alias_t
 		{
 			using _traits = make_traits<value_type_of<Expression>, tag::is_selectable, tag::is_alias>;
-			using _recursive_traits = make_recursive_traits<Expression>;
+			using _nodes = detail::type_vector<Expression>;
 
 			static_assert(is_expression_t<Expression>::value, "invalid argument for an expression alias");
 			static_assert(not is_alias_t<Expression>::value, "cannot create an alias of an alias");
 
-			using _name_t = typename AliasProvider::_name_t;
+			using _alias_t = typename AliasProvider::_alias_t;
 
 			Expression _expression;
 		};
@@ -49,14 +49,14 @@ namespace sqlpp
 	template<typename Context, typename Expression, typename AliasProvider>
 		struct serializer_t<Context, expression_alias_t<Expression, AliasProvider>>
 		{
+			using _serialize_check = serialize_check_of<Context, Expression>;
 			using T = expression_alias_t<Expression, AliasProvider>;
 
 			static Context& _(const T& t, Context& context)
 			{
-				context << '(';
+				serialize_operand(t._expression, context);
-				serialize(t._expression, context);
+				context << " AS ";
-				context << ") AS ";
+				context << name_of<T>::char_ptr();
-				context << T::_name_t::_get_name();
 				return context;
 			}
 		};

include/sqlpp11/alias_provider.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,13 +28,15 @@
 #define SQLPP_ALIAS_PROVIDER_H
 
 #include <type_traits>
+#include <sqlpp11/char_sequence.h>
 
 #define SQLPP_ALIAS_PROVIDER(name) \
 	struct name##_t\
 {\
-	struct _name_t\
+	struct _alias_t\
 	{\
-		static constexpr const char* _get_name() { return #name; }\
+		static constexpr const char _literal[] =  #name;\
+		using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;\
 		template<typename T>\
 		struct _member_t\
 		{\
@@ -55,7 +57,7 @@ namespace sqlpp
 		};
 
 	template<typename T>
-		struct is_alias_provider_t<T, typename std::enable_if<std::is_class<typename T::_name_t::template _member_t<int>>::value, void>::type>
+		struct is_alias_provider_t<T, typename std::enable_if<std::is_class<typename T::_alias_t::template _member_t<int>>::value, void>::type>
 		{
 			static constexpr bool value = true;
 		};

include/sqlpp11/all_of.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -51,14 +51,26 @@ namespace sqlpp
 			return {};
 		}
 
+	struct assert_no_stand_alone_all_of_t
+	{
+		using type = std::false_type;
+
+		template<typename T = void>
+		static void _()
+		{
+			static_assert(wrong_t<T>::value, "all_of(table) seems to be used outside of select");
+		}
+	};
+
 	template<typename Context, typename Table>
 		struct serializer_t<Context, all_of_t<Table>>
 		{
+			using _serialize_check = assert_no_stand_alone_all_of_t;
 			using T = all_of_t<Table>;
 
 			static Context& _(const T& t, const Context&)
 			{
-				static_assert(wrong_t<serializer_t>::value, "all_of(table) does not seem to be used in select");
+				_serialize_check::_();
 			}
 		};
 

include/sqlpp11/any.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,6 +28,7 @@
 #define SQLPP_ANY_H
 
 #include <sqlpp11/boolean.h>
+#include <sqlpp11/char_sequence.h>
 #include <sqlpp11/detail/type_set.h>
 
 namespace sqlpp
@@ -36,11 +37,12 @@ namespace sqlpp
 		struct any_t
 		{
 			using _traits = make_traits<value_type_of<Select>, tag::is_multi_expression>;
-			using _recursive_traits = make_recursive_traits<Select>;
+			using _nodes = detail::type_vector<Select>;
 
-			struct _name_t
+			struct _alias_t
 			{
-				static constexpr const char* _get_name() { return "ANY"; }
+        static constexpr const char _literal[] =  "any_";
+        using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 				template<typename T>
 					struct _member_t
 					{
@@ -66,6 +68,7 @@ namespace sqlpp
 	template<typename Context, typename Select>
 		struct serializer_t<Context, any_t<Select>>
 		{
+			using _serialize_check = serialize_check_of<Context, Select>;
 			using T = any_t<Select>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/assignment.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -41,7 +41,7 @@ namespace sqlpp
 		struct assignment_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_assignment>;
-			using _recursive_traits = make_recursive_traits<Lhs, Rhs>;
+			using _nodes = detail::type_vector<Lhs, Rhs>;
 
 			using _lhs_t = Lhs;
 			using _rhs_t = rhs_wrap_t<allow_tvin_t<Rhs>, trivial_value_is_null_t<_lhs_t>::value>;
@@ -66,13 +66,14 @@ namespace sqlpp
 	template<typename Context, typename Lhs, typename Rhs>
 		struct serializer_t<Context, assignment_t<Lhs, Rhs>>
 		{
+			using _serialize_check = serialize_check_of<Context, Lhs, Rhs>;
 			using T = assignment_t<Lhs, Rhs>;
 
 			static Context& _(const T& t, Context& context)
 			{
 				serialize(simple_column(t._lhs), context);
 				context << "=";
-				serialize(t._rhs, context);
+				serialize_operand(t._rhs, context);
 				return context;
 			}
 		};

include/sqlpp11/avg.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,6 +28,7 @@
 #define SQLPP_AVG_H
 
 #include <sqlpp11/type_traits.h>
+#include <sqlpp11/char_sequence.h>
 
 namespace sqlpp
 {
@@ -37,14 +38,15 @@ namespace sqlpp
 			public alias_operators<avg_t<Flag, Expr>>
 	{
 		using _traits = make_traits<floating_point, tag::is_expression, tag::is_selectable>;
-		using _recursive_traits = make_recursive_traits<Expr, aggregate_function>;
+		using _nodes = detail::type_vector<Expr, aggregate_function>;
 
 		static_assert(is_noop<Flag>::value or std::is_same<distinct_t, Flag>::value, "avg() used with flag other than 'distinct'");
 		static_assert(is_numeric_t<Expr>::value, "avg() requires a value expression as argument");
 
-		struct _name_t
+		struct _alias_t
 		{
-			static constexpr const char* _get_name() { return "AVG"; }
+			static constexpr const char _literal[] =  "avg_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 			template<typename T>
 				struct _member_t
 				{
@@ -70,6 +72,7 @@ namespace sqlpp
 	template<typename Context, typename Flag, typename Expr>
 		struct serializer_t<Context, avg_t<Flag, Expr>>
 		{
+			using _serialize_check = serialize_check_of<Context, Flag, Expr>;
 			using T = avg_t<Flag, Expr>;
 
 			static Context& _(const T& t, Context& context)
@@ -79,8 +82,12 @@ namespace sqlpp
 				{
 					serialize(Flag(), context);
 					context << ' ';
+					serialize_operand(t._expr, context);
+				}
+				else
+				{
+					serialize(t._expr, context);
 				}
-				serialize(t._expr, context);
 				context << ")";
 				return context;
 			}

include/sqlpp11/bad_statement.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2013-2015, 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_BAD_STATEMENT_H
+#define SQLPP_BAD_STATEMENT_H
+
+namespace sqlpp
+{
+	struct bad_statement
+	{
+		template<typename... T>
+			bad_statement(T&&...) {}
+	};
+}
+
+#endif
+
+

include/sqlpp11/basic_expression_operators.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -34,7 +34,7 @@
 #include <sqlpp11/in_fwd.h>
 #include <sqlpp11/is_null_fwd.h>
 #include <sqlpp11/wrap_operand_fwd.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 
 namespace sqlpp
 {
@@ -106,12 +106,12 @@ namespace sqlpp
 					return { *static_cast<const Expr*>(this), rhs{t} };
 				}
 
-			is_null_t<true, Expr> is_null() const
+			is_null_t<Expr> is_null() const
 			{
 				return { *static_cast<const Expr*>(this) };
 			}
 
-			is_null_t<false, Expr> is_not_null() const
+			is_not_null_t<Expr> is_not_null() const
 			{
 				return { *static_cast<const Expr*>(this) };
 			}
@@ -128,16 +128,16 @@ namespace sqlpp
 
 			// Hint: use value_list wrapper for containers...
 			template<typename... T>
-				in_t<true, Expr, wrap_operand_t<T>...> in(T... t) const
+				in_t<Expr, wrap_operand_t<T>...> in(T... t) const
 				{
-					static_assert(detail::all_t<_is_valid_comparison_operand<wrap_operand_t<T>>::value...>::value, "at least one operand of in() is not valid");
+					static_assert(logic::all_t<_is_valid_comparison_operand<wrap_operand_t<T>>::value...>::value, "at least one operand of in() is not valid");
 					return { *static_cast<const Expr*>(this), wrap_operand_t<T>{t}... };
 				}
 
 			template<typename... T>
-				in_t<false, Expr, wrap_operand_t<T>...> not_in(T... t) const
+				not_in_t<Expr, wrap_operand_t<T>...> not_in(T... t) const
 				{
-					static_assert(detail::all_t<_is_valid_comparison_operand<wrap_operand_t<T>>::value...>::value, "at least one operand of in() is not valid");
+					static_assert(logic::all_t<_is_valid_comparison_operand<wrap_operand_t<T>>::value...>::value, "at least one operand of in() is not valid");
 					return { *static_cast<const Expr*>(this), wrap_operand_t<T>{t}... };
 				}
 		};

include/sqlpp11/boolean.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/boolean_expression.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -36,7 +36,7 @@ namespace sqlpp
 		struct boolean_expression_t: public expression_operators<boolean_expression_t<Database>, boolean>
 		{
 			using _traits = make_traits<boolean, tag::is_expression>;
-			using _recursive_traits = make_recursive_traits<>;
+			using _nodes = detail::type_vector<>;
 
 			template<typename Expr>
 			boolean_expression_t(Expr expr):
@@ -71,6 +71,7 @@ namespace sqlpp
 	template<typename Context, typename Database>
 		struct serializer_t<Context, boolean_expression_t<Database>>
 		{
+			using _serialize_check = consistent_t;
 			using T = boolean_expression_t<Database>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/char_sequence.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2013-2015, 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_CHAR_SEQUENCE_H
+#define SQLPP_CHAR_SEQUENCE_H
+
+#include <sqlpp11/detail/index_sequence.h>
+
+namespace sqlpp
+{
+	template<char... Cs> struct char_sequence
+	{
+		static const char* char_ptr()
+		{
+			static char s[] = {Cs...};
+			return s;
+		};
+	};
+
+	template<std::size_t N, const char (&s) [N], typename T>
+		struct make_char_sequence_impl;
+
+	template<std::size_t N, const char (&s) [N], std::size_t... i>
+		struct make_char_sequence_impl<N, s, sqlpp::detail::index_sequence<i...>>
+		{
+			using type = char_sequence<s[i]...>;
+		};
+
+	template<std::size_t N, const char (&Input) [N]>
+		using make_char_sequence = typename make_char_sequence_impl<sizeof(Input), Input, sqlpp::detail::make_index_sequence<sizeof(Input)>>::type;
+}
+
+#endif

include/sqlpp11/column.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -52,21 +52,13 @@ namespace sqlpp
 			using _tags = detail::make_joined_set_t<detail::type_set<tag::is_column, tag::is_expression, tag::is_selectable>, typename ColumnSpec::_traits::_tags>;
 		};
 
-		struct _recursive_traits
+		using _nodes = detail::type_vector<>;
-		{
+		using _required_tables = detail::type_set<Table>;
-			using _parameters = std::tuple<>;
+		using _can_be_null = column_spec_can_be_null_t<ColumnSpec>;
-			using _provided_tables = detail::type_set<>;
-			using _provided_outer_tables = detail::type_set<>;
-			using _required_tables = detail::type_set<Table>;
-			using _extra_tables = detail::type_set<>;
-			using _tags = typename std::conditional<column_spec_can_be_null_t<ColumnSpec>::value,
-									detail::type_set<tag::can_be_null>,
-									detail::type_set<>>::type;
-		};
 
 		using _spec_t = ColumnSpec;
 		using _table = Table;
-		using _name_t = typename _spec_t::_name_t;
+		using _alias_t = typename _spec_t::_alias_t;
 
 		template<typename T>
 			using _is_valid_operand = is_valid_operand<value_type_of<ColumnSpec>, T>;
@@ -78,9 +70,11 @@ namespace sqlpp
 		column_t& operator=(column_t&&) = default;
 		~column_t() = default;
 
-		static constexpr const char* _get_name()
+		template<typename T = _table>
+		auto table() const -> _table
 		{
-			return _name_t::_get_name();
+			static_assert(is_table_t<T>::value, "cannot call get_table for columns of a sub-selects or cte");
+			return _table{};
 		}
 
 		template<typename alias_provider>
@@ -115,11 +109,12 @@ namespace sqlpp
 	template<typename Context, typename... Args>
 		struct serializer_t<Context, column_t<Args...>>
 		{
+			using _serialize_check = consistent_t;
 			using T = column_t<Args...>;
 
 			static Context& _(const T& t, Context& context)
 			{
-				context << T::_table::_name_t::_get_name() << '.' << T::_name_t::_get_name();
+				context << name_of<typename T::_table>::char_ptr() << '.' << name_of<T>::char_ptr();
 				return context;
 			}
 		};

include/sqlpp11/column_fwd.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/column_types.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/concat.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,9 +28,10 @@
 #define SQLPP_CONCAT_H
 
 #include <sqlpp11/type_traits.h>
+#include <sqlpp11/char_sequence.h>
 #include <sqlpp11/interpret_tuple.h>
 #include <sqlpp11/basic_expression_operators.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 
 namespace sqlpp
 {
@@ -41,13 +42,14 @@ namespace sqlpp
 			public alias_operators<concat_t<First, Args...>>
 	{
 		using _traits = make_traits<value_type_of<First>, tag::is_expression, tag::is_selectable>;
-		using _recursive_traits = make_recursive_traits<First, Args...>;
+		using _nodes = detail::type_vector<First, Args...>;
 
 		static_assert(sizeof...(Args) > 0, "concat requires two arguments at least");
-		static_assert(detail::all_t<is_text_t<First>::value, is_text_t<Args>::value...>::value, "at least one non-text argument detected in concat()");
+		static_assert(logic::all_t<is_text_t<First>::value, is_text_t<Args>::value...>::value, "at least one non-text argument detected in concat()");
-		struct _name_t
+		struct _alias_t
 		{
-			static constexpr const char* _get_name() { return "CONCAT"; }
+			static constexpr const char _literal[] =  "concat_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 			template<typename T>
 				struct _member_t
 				{
@@ -71,6 +73,7 @@ namespace sqlpp
 	template<typename Context, typename First, typename... Args>
 		struct serializer_t<Context, concat_t<First, Args...>>
 		{
+			using _serialize_check = serialize_check_of<Context, First, Args...>;
 			using T = concat_t<First, Args...>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/connection.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/count.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -27,6 +27,7 @@
 #ifndef SQLPP_COUNT_H
 #define SQLPP_COUNT_H
 
+#include <sqlpp11/char_sequence.h>
 #include <sqlpp11/select_flags.h>
 #include <sqlpp11/integral.h>
 
@@ -38,23 +39,16 @@ namespace sqlpp
 			public alias_operators<count_t<Flag, Expr>>
 	{
 		using _traits = make_traits<integral, tag::is_expression, tag::is_selectable>;
-		struct _recursive_traits
-		{
-			using _required_tables = required_tables_of<Expr>;
-			using _provided_tables = provided_tables_of<Expr>;
-			using _provided_outer_tables = provided_outer_tables_of<Expr>;
-			using _extra_tables = extra_tables_of<Expr>;
-			using _parameters = parameters_of<Expr>;
-			using _tags = detail::make_difference_set_t<detail::joined_set_t<recursive_tags_of<Expr>, recursive_tags_of<aggregate_function>>, 
-						                                      detail::type_set<tag::can_be_null>>;
-		};
 
+		using _nodes = detail::type_vector<Expr, aggregate_function>;
+		using _can_be_null = std::false_type;
 
 		static_assert(is_noop<Flag>::value or std::is_same<distinct_t, Flag>::value, "count() used with flag other than 'distinct'");
 
-		struct _name_t
+		struct _alias_t
 		{
-			static constexpr const char* _get_name() { return "COUNT"; }
+			static constexpr const char _literal[] =  "count_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 			template<typename T>
 				struct _member_t
 				{
@@ -80,6 +74,7 @@ namespace sqlpp
 	template<typename Context, typename Flag, typename Expr>
 		struct serializer_t<Context, count_t<Flag, Expr>>
 		{
+			using _serialize_check = serialize_check_of<Context, Flag, Expr>;
 			using T = count_t<Flag, Expr>;
 
 			static Context& _(const T& t, Context& context)
@@ -89,8 +84,12 @@ namespace sqlpp
 				{
 					serialize(Flag(), context);
 					context << ' ';
+					serialize_operand(t._expr, context);
+				}
+				else
+				{
+					serialize(t._expr, context);
 				}
-				serialize(t._expr, context);
 				context << ")";
 				return context;
 			}
@@ -99,6 +98,7 @@ namespace sqlpp
 	template<typename T>
 		auto count(T t) -> count_t<noop, wrap_operand_t<T>>
 		{
+			static_assert(not contains_aggregate_function_t<wrap_operand_t<T>>::value, "count() cannot be used on an aggregate function");
 			static_assert(is_expression_t<wrap_operand_t<T>>::value, "count() requires an expression as argument");
 			return { t };
 		}
@@ -106,6 +106,7 @@ namespace sqlpp
 	template<typename T>
 		auto count(const distinct_t&, T t) -> count_t<distinct_t, wrap_operand_t<T>>
 		{
+			static_assert(not contains_aggregate_function_t<wrap_operand_t<T>>::value, "count() cannot be used on an aggregate function");
 			static_assert(is_expression_t<wrap_operand_t<T>>::value, "count() requires an expression as argument");
 			return { t };
 		}

include/sqlpp11/cte.h

@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 2013-2015, 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_CTE_H
+#define SQLPP_CTE_H
+
+#include <sqlpp11/table_ref.h>
+#include <sqlpp11/select_flags.h>
+#include <sqlpp11/result_row.h>
+#include <sqlpp11/statement_fwd.h>
+#include <sqlpp11/type_traits.h>
+#include <sqlpp11/parameter_list.h>
+#include <sqlpp11/expression.h>
+#include <sqlpp11/interpret_tuple.h>
+#include <sqlpp11/interpretable_list.h>
+#include <sqlpp11/logic.h>
+
+namespace sqlpp
+{
+	template<typename Flag, typename Lhs, typename Rhs>
+		struct cte_union_t
+		{
+			using _nodes = detail::type_vector<>;
+			using _required_ctes = detail::make_joined_set_t<required_ctes_of<Lhs>, required_ctes_of<Rhs>>;
+			using _parameters = detail::type_vector_cat_t<parameters_of<Lhs>, parameters_of<Rhs>>;
+
+			cte_union_t(Lhs lhs, Rhs rhs):
+				_lhs(lhs),
+				_rhs(rhs)
+			{}
+
+			cte_union_t(const cte_union_t&) = default;
+			cte_union_t(cte_union_t&&) = default;
+			cte_union_t& operator=(const cte_union_t&) = default;
+			cte_union_t& operator=(cte_union_t&&) = default;
+			~cte_union_t() = default;
+
+			Lhs _lhs;
+			Rhs _rhs;
+		};
+
+	// Interpreters
+	template<typename Context, typename Flag, typename Lhs, typename Rhs>
+		struct serializer_t<Context, cte_union_t<Flag, Lhs, Rhs>>
+		{
+			using _serialize_check = serialize_check_of<Context, Lhs, Rhs>;
+			using T = cte_union_t<Flag, Lhs, Rhs>;
+
+			static Context& _(const T& t, Context& context)
+			{
+				serialize(t._lhs, context);
+				context << " UNION ";
+				serialize(Flag{}, context);
+				context << " ";
+				serialize(t._rhs, context);
+				return context;
+			}
+		};
+
+	template<typename AliasProvider, typename Statement, typename... FieldSpecs>
+		struct cte_t;
+
+	template<typename AliasProvider>
+		struct cte_ref_t;
+
+	template<typename AliasProvider, typename Statement, typename... FieldSpecs>
+		auto from_table(cte_t<AliasProvider, Statement, FieldSpecs...> t) -> cte_ref_t<AliasProvider>
+		{
+			return cte_ref_t<AliasProvider>{};
+		}
+
+	template<typename AliasProvider, typename Statement, typename... FieldSpecs>
+		struct from_table_impl<cte_t<AliasProvider, Statement, FieldSpecs...>>
+		{
+			using type = cte_ref_t<AliasProvider>;
+		};
+
+
+	template<typename FieldSpec>
+		struct cte_column_spec_t
+		{
+			using _alias_t = typename FieldSpec::_alias_t;
+
+			using _traits = make_traits<value_type_of<FieldSpec>, 
+						tag::must_not_insert, 
+						tag::must_not_update,
+						tag_if<tag::can_be_null, column_spec_can_be_null_t<FieldSpec>::value>
+							>;
+		};
+
+	template<typename AliasProvider, typename Statement, typename ResultRow>
+		struct make_cte_impl
+		{
+			using type = void;
+		};
+
+	template<typename AliasProvider, typename Statement, typename... FieldSpecs>
+		struct make_cte_impl<AliasProvider, Statement, result_row_t<void, FieldSpecs...>>
+		{
+			using type = cte_t<AliasProvider, Statement, FieldSpecs...>;
+		};
+
+	template<typename AliasProvider, typename Statement>
+		using make_cte_t = typename make_cte_impl<AliasProvider, Statement, get_result_row_t<Statement>>::type;
+
+	template<typename AliasProvider, typename Statement, typename... FieldSpecs>
+		struct cte_t: public member_t<cte_column_spec_t<FieldSpecs>, column_t<AliasProvider, cte_column_spec_t<FieldSpecs>>>...
+		{
+			using _traits = make_traits<no_value_t, tag::is_cte, tag::is_table>; // FIXME: is table? really?
+			using _nodes = detail::type_vector<>;
+			using _required_ctes = detail::make_joined_set_t<required_ctes_of<Statement>, detail::type_set<AliasProvider>>;
+			using _parameters = parameters_of<Statement>;
+
+			using _alias_t = typename AliasProvider::_alias_t;
+			constexpr static bool _is_recursive = detail::is_element_of<AliasProvider, required_ctes_of<Statement>>::value;
+
+			using _column_tuple_t = std::tuple<column_t<AliasProvider, cte_column_spec_t<FieldSpecs>>...>;
+
+			template<typename... T>
+				using _check = logic::all_t<is_statement_t<T>::value...>;
+
+			using _result_row_t = result_row_t<void, FieldSpecs...>; 
+
+			template<typename Rhs>
+				auto union_distinct(Rhs rhs) const
+				-> typename std::conditional<_check<Rhs>::value, cte_t<AliasProvider, cte_union_t<distinct_t, Statement, Rhs>, FieldSpecs...>, bad_statement>::type
+				{
+					static_assert(is_statement_t<Rhs>::value, "argument of union call has to be a statement");
+					static_assert(has_policy_t<Rhs, is_select_t>::value, "argument of union call has to be a select");
+					static_assert(has_result_row_t<Rhs>::value, "argument of a union has to be a (complete) select statement");
+
+					static_assert(std::is_same<_result_row_t, get_result_row_t<Rhs>>::value, "both select statements in a union have to have the same result columns (type and name)");
+
+					return _union_impl<void, distinct_t>(_check<Rhs>{}, rhs);
+				}
+
+			template<typename Rhs>
+				auto union_all(Rhs rhs) const
+				-> typename std::conditional<_check<Rhs>::value, cte_t<AliasProvider, cte_union_t<all_t, Statement, Rhs>, FieldSpecs...>, bad_statement>::type
+				{
+					static_assert(is_statement_t<Rhs>::value, "argument of union call has to be a statement");
+					static_assert(has_policy_t<Rhs, is_select_t>::value, "argument of union call has to be a select");
+					static_assert(has_result_row_t<Rhs>::value, "argument of a union has to be a (complete) select statement");
+
+					static_assert(std::is_same<_result_row_t, get_result_row_t<Rhs>>::value, "both select statements in a union have to have the same result columns (type and name)");
+
+					return _union_impl<all_t>(_check<Rhs>{}, rhs);
+				}
+
+		private:
+			template<typename Flag, typename Rhs>
+				auto _union_impl(const std::false_type&, Rhs rhs) const
+				-> bad_statement;
+
+			template<typename Flag, typename Rhs>
+				auto _union_impl(const std::true_type&, Rhs rhs) const
+				-> cte_t<AliasProvider, cte_union_t<Flag, Statement, Rhs>, FieldSpecs...>
+				{
+					return cte_union_t<Flag, Statement, Rhs>{_statement, rhs};
+				}
+
+		public:
+
+			cte_t(Statement statement): _statement(statement){}
+			cte_t(const cte_t&) = default;
+			cte_t(cte_t&&) = default;
+			cte_t& operator=(const cte_t&) = default;
+			cte_t& operator=(cte_t&&) = default;
+			~cte_t() = default;
+
+			Statement _statement;
+		};
+
+	template<typename Context, typename AliasProvider, typename Statement, typename... ColumnSpecs>
+		struct serializer_t<Context, cte_t<AliasProvider, Statement, ColumnSpecs...>>
+		{
+			using _serialize_check = serialize_check_of<Context, Statement>;
+			using T = cte_t<AliasProvider, Statement, ColumnSpecs...>;
+
+			static Context& _(const T& t, Context& context)
+			{
+				context << name_of<T>::char_ptr() << " AS (";
+				serialize(t._statement, context);
+				context << ")";
+				return context;
+			}
+		};
+
+
+// The cte_t is displayed as AliasProviderName except within the with:
+//    - the with needs the 
+//      AliasProviderName AS (ColumnNames) (select/union)
+// The result row of the select should not have dynamic parts
+	template<typename AliasProvider>
+		struct cte_ref_t
+		{
+			using _traits = make_traits<no_value_t, tag::is_alias, tag::is_cte, tag::is_table>; // FIXME: is table? really?
+			using _nodes = detail::type_vector<>;
+			using _required_ctes = detail::make_type_set_t<AliasProvider>;
+			using _provided_tables = detail::type_set<AliasProvider>;
+
+			using _alias_t = typename AliasProvider::_alias_t;
+
+			template<typename Statement>
+				auto as(Statement statement)
+				-> make_cte_t<AliasProvider, Statement>
+				{
+					static_assert(required_tables_of<Statement>::size::value == 0, "common table expression must not use unknown tables");
+					static_assert(not detail::is_element_of<AliasProvider, required_ctes_of<Statement>>::value, "common table expression must not self-reference in the first part, use union_all/union_distinct for recursion");
+					static_assert(is_static_result_row_t<get_result_row_t<Statement>>::value, "ctes must not have dynamically added columns");
+
+					return { statement };
+				}
+		};
+
+	template<typename Context, typename AliasProvider>
+		struct serializer_t<Context, cte_ref_t<AliasProvider>>
+		{
+			using _serialize_check = consistent_t;
+			using T = cte_ref_t<AliasProvider>;
+
+			static Context& _(const T& t, Context& context)
+			{
+				context << name_of<T>::char_ptr();
+				return context;
+			}
+		};
+
+	template<typename AliasProvider>
+		auto cte(const AliasProvider&)
+		-> cte_ref_t<AliasProvider>
+		{
+			return {};
+		}
+
+}
+
+#endif

include/sqlpp11/custom_query.h

@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2013-2015, 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_CUSTOM_QUERY_H
+#define SQLPP_CUSTOM_QUERY_H
+
+#include <sqlpp11/connection.h>
+#include <sqlpp11/interpret_tuple.h>
+#include <sqlpp11/hidden.h>
+#include <sqlpp11/detail/get_first.h>
+
+namespace sqlpp
+{
+	template<typename Database, typename... Parts>
+	struct custom_query_t;
+
+	namespace detail
+	{
+		template<typename Db, typename... Parts>
+		struct custom_parts_t
+		{
+			using _custom_query_t = custom_query_t<Db, Parts...>;
+			using _result_type_provider = detail::get_first_if<is_return_value_t, noop, Parts...>;
+			using _result_methods_t = typename _result_type_provider::template _result_methods_t<_result_type_provider>;
+		};
+	}
+
+	template<typename Database, typename... Parts>
+	struct custom_query_t:
+		private detail::custom_parts_t<Database, Parts...>::_result_methods_t
+	{
+		using _methods_t = typename detail::custom_parts_t<Database, Parts...>::_result_methods_t;
+		using _traits = make_traits<no_value_t, tag::is_statement>;
+		using _nodes = detail::type_vector<Parts...>;
+
+		using _parameter_check = typename std::conditional<detail::type_vector_size<parameters_of<custom_query_t>>::value == 0,
+					consistent_t, assert_no_parameters_t>::type;
+		using _run_check = detail::get_first_if<is_inconsistent_t, consistent_t, 
+					_parameter_check>;
+		using _prepare_check = consistent_t;
+
+		custom_query_t(Parts... parts):
+			_parts(parts...)
+		{}
+
+		custom_query_t(std::tuple<Parts...> parts):
+			_parts(parts)
+		{}
+
+		custom_query_t(const custom_query_t&) = default;
+		custom_query_t(custom_query_t&&) = default;
+		custom_query_t& operator=(const custom_query_t&) = default;
+		custom_query_t& operator=(custom_query_t&&) = default;
+		~custom_query_t() = default;
+
+		template<typename Db>
+		auto _run(Db& db) const	-> decltype(std::declval<_methods_t>()._run(db, *this))
+		{
+			_run_check::_();
+			return _methods_t::_run(db, *this);
+		}
+
+		template<typename Db>
+		auto _prepare(Db& db) const	-> decltype(std::declval<_methods_t>()._prepare(db, *this))
+		{
+			_prepare_check::_();
+			return _methods_t::_prepare(db, *this);
+		}
+
+		static constexpr size_t _get_static_no_of_parameters()
+		{
+			return std::tuple_size<parameters_of<custom_query_t>>::value;
+		}
+
+		size_t _get_no_of_parameters() const
+		{
+			return _get_static_no_of_parameters();
+		}
+
+		template<typename Part>
+			auto with_result_type_of(Part part)
+			-> custom_query_t<Database, Part, Parts...>
+			{
+				return {tuple_cat(std::make_tuple(part), _parts)};
+			}
+
+		std::tuple<Parts...> _parts;
+	};
+
+	template<typename Context, typename Database, typename... Parts>
+		struct serializer_t<Context, custom_query_t<Database, Parts...>>
+		{
+			using _serialize_check = serialize_check_of<Context, Parts...>;
+			using T = custom_query_t<Database, Parts...>;
+
+			static Context& _(const T& t, Context& context)
+			{
+				interpret_tuple_without_braces(t._parts, " ", context);
+				return context;
+			}
+		};
+
+	template<typename... Parts>
+		auto custom_query(Parts... parts)
+		-> custom_query_t<void, wrap_operand_t<Parts>...>
+		{
+			static_assert(sizeof...(Parts) > 0, "custom query requires at least one argument");
+			return custom_query_t<void, wrap_operand_t<Parts>...>(parts...);
+		}
+
+	template<typename Database, typename... Parts>
+		auto dynamic_custom_query(const Database&, Parts... parts)
+		-> custom_query_t<Database, wrap_operand_t<Parts>...>
+		{
+			static_assert(sizeof...(Parts) > 0, "custom query requires at least one query argument");
+			static_assert(std::is_base_of<connection, Database>::value, "Invalid database parameter");
+
+			return custom_query_t<Database, wrap_operand_t<Parts>...>(parts...);
+		}
+}
+#endif

include/sqlpp11/default_value.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -34,7 +34,7 @@ namespace sqlpp
 	struct default_value_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_expression>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		static constexpr bool _is_trivial() { return false; }
 	};
@@ -42,6 +42,7 @@ namespace sqlpp
 	template<typename Context>
 		struct serializer_t<Context, default_value_t>
 		{
+			using _serialize_check = consistent_t;
 			using Operand = default_value_t;
 
 			static Context& _(const Operand& t, Context& context)

include/sqlpp11/detail/copy_tuple_args.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/detail/field_index_sequence.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/detail/get_first.h

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2013-2015, 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_DETAIL_GET_FIRST_H
+#define SQLPP_DETAIL_GET_FIRST_H
+
+#include <type_traits>
+
+namespace sqlpp
+{
+	namespace detail
+	{
+		template<template<typename> class Predicate, typename Default, typename... T>
+			struct get_first_if_impl;
+
+		template<template<typename> class Predicate, typename Default>
+			struct get_first_if_impl<Predicate, Default>
+			{
+				using type = Default;
+			};
+
+		template<template<typename> class Predicate, typename Default, typename T, typename... Rest>
+			struct get_first_if_impl<Predicate, Default, T, Rest...>
+			{
+				using rest = typename get_first_if_impl<Predicate, Default, Rest...>::type;
+				using type = typename std::conditional<Predicate<T>::value,
+							T,
+							rest>::type;
+			};
+
+		template<template<typename> class Predicate, typename Default, typename... T>
+			using get_first_if = typename get_first_if_impl<Predicate, Default, T...>::type;
+	}
+}
+
+
+#endif

include/sqlpp11/detail/get_last.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/detail/index_sequence.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/detail/pick_arg.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/detail/sum.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/detail/type_set.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -27,10 +27,9 @@
 #ifndef SQLPP_DETAIL_TYPE_SET_H
 #define SQLPP_DETAIL_TYPE_SET_H
 
-#include <tuple>
 #include <type_traits>
 #include <sqlpp11/wrong.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 
 namespace sqlpp
 {
@@ -40,6 +39,9 @@ namespace sqlpp
 		template<typename... T>
 			struct make_type_set;
 
+		template<typename... T>
+			using make_type_set_t = typename make_type_set<T...>::type;
+
 		template<typename E, typename SET>
 			struct is_element_of;
 
@@ -50,7 +52,7 @@ namespace sqlpp
 			using size = std::integral_constant<size_t, sizeof...(Elements)>;
 			using _is_type_set = std::true_type;
 
-			static_assert(std::is_same<type_set, typename make_type_set<Elements...>::type>::value, "use make_type_set to construct a set");
+			static_assert(std::is_same<type_set, make_type_set_t<Elements...>>::value, "use make_type_set to construct a typeset");
 
 			template<typename T>
 				struct insert
@@ -79,7 +81,7 @@ namespace sqlpp
 		template<typename E, typename... Elements>
 			struct is_element_of<E, type_set<Elements...>>
 			{
-				static constexpr bool value = any_t<std::is_same<E, Elements>::value...>::value;
+				static constexpr bool value = ::sqlpp::logic::any_t<std::is_same<E, Elements>::value...>::value;
 			};
 
 		template<typename L, typename R>
@@ -91,7 +93,7 @@ namespace sqlpp
 		template<typename... LElements, typename... RElements>
 			struct joined_set<type_set<LElements...>, type_set<RElements...>>
 			{
-				using type = typename make_type_set<LElements..., RElements...>::type;
+				using type = make_type_set_t<LElements..., RElements...>;
 			};
 
 		template<typename L, typename R>
@@ -139,9 +141,6 @@ namespace sqlpp
 				using type = typename make_type_set<Rest...>::type::template insert<T>::type;
 			};
 
-		template<typename... T>
-			using make_type_set_t = typename make_type_set<T...>::type;
-
 		template<template<typename> class Predicate, typename... T>
 			struct make_type_set_if;
 
@@ -168,8 +167,11 @@ namespace sqlpp
 				using type = typename make_type_set_if<InversePredicate, T...>::type;
 			};
 
+		template<template<typename> class Predicate, typename... T>
+			using make_type_set_if_not_t = typename make_type_set_if_not<Predicate, T...>::type;
+
 		template<typename... T>
-			using has_duplicates = std::integral_constant<bool, make_type_set<T...>::type::size::value != sizeof...(T)>;
+			using has_duplicates = std::integral_constant<bool, make_type_set_t<T...>::size::value != sizeof...(T)>;
 
 		template<typename... T>
 			struct make_joined_set
@@ -205,7 +207,7 @@ namespace sqlpp
 			{
 				template<typename E>
 					using is_subtrahend = is_element_of<E, type_set<Subtrahends...>>;
-				using type = typename make_type_set_if_not<is_subtrahend, Minuends...>::type;
+				using type = make_type_set_if_not_t<is_subtrahend, Minuends...>;
 			};
 
 		template<typename Minuend, typename Subtrahend>
@@ -221,8 +223,8 @@ namespace sqlpp
 			struct make_intersect_set<type_set<LhsElements...>, type_set<RhsElements...>>
 			{
 				template<typename E>
-					using is_in_both = all_t<is_element_of<E, type_set<LhsElements...>>::value, is_element_of<E, type_set<RhsElements...>>::value>;
+					using is_in_both = ::sqlpp::logic::all_t<is_element_of<E, type_set<LhsElements...>>::value, is_element_of<E, type_set<RhsElements...>>::value>;
-				using type = typename make_type_set_if<is_in_both, LhsElements...>::type;
+				using type = make_type_set_if_t<is_in_both, LhsElements...>;
 			};
 
 		template<typename Lhs, typename Rhs>
@@ -238,7 +240,7 @@ namespace sqlpp
 		template<template<typename> class Transformation, typename... E>
 			struct transform_set<Transformation, type_set<E...>>
 			{
-				using type = typename make_type_set<Transformation<E>...>::type;
+				using type = make_type_set_t<Transformation<E>...>;
 			};
 
 		template<template<typename> class Transformation, typename T>

include/sqlpp11/detail/type_vector.h

@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2013-2015, 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_DETAIL_TYPE_VECTOR_H
+#define SQLPP_DETAIL_TYPE_VECTOR_H
+
+#include <sqlpp11/wrong.h>
+
+namespace sqlpp
+{
+	namespace detail
+	{
+		template<typename... T>
+			struct type_vector
+			{};
+
+		template<typename...T>
+			struct type_vector_cat_impl
+			{
+				static_assert(wrong_t<type_vector_cat_impl>::value, "type_vector_cat must be called with type_vector arguments");
+			};
+
+		template<>
+			struct type_vector_cat_impl<>
+			{
+				using type = type_vector<>;
+			};
+
+		template<typename... T>
+			struct type_vector_cat_impl<type_vector<T...>>
+			{
+				using type = type_vector<T...>;
+			};
+
+		template<typename... L, typename... R>
+			struct type_vector_cat_impl<type_vector<L...>, type_vector<R...>>
+			{
+				using type = type_vector<L..., R...>;
+			};
+
+		template<typename... L, typename... Rest>
+			struct type_vector_cat_impl<type_vector<L...>, Rest...>
+			{
+				using type = typename type_vector_cat_impl<type_vector<L...>, typename type_vector_cat_impl<Rest...>::type>::type;
+			};
+
+		template<typename... T>
+			using type_vector_cat_t = typename type_vector_cat_impl<T...>::type;
+
+		template<typename T>
+			struct type_vector_size
+			{
+				static_assert(wrong_t<type_vector_size>::value, "type_vector_size needs to be called with a type_vector argument");
+			};
+
+		template<typename... T>
+			struct type_vector_size<type_vector<T...>>
+			{
+				static constexpr std::size_t value = sizeof...(T);
+			};
+	}
+}
+
+
+#endif

include/sqlpp11/eval.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -40,7 +40,7 @@ namespace sqlpp
 			static_assert(is_database<Db>::value, "Db parameter of eval has to be a database connection");
 			static_assert(is_expression_t<Expr>::value, "Expression parameter of eval has to be an sqlpp expression or a string");
 			static_assert(required_tables_of<Expr>::size::value == 0, "Expression cannot be used in eval because it requires tables");
-			using _name_type = alias::a_t::_name_t;
+			using _name_type = alias::a_t::_alias_t;
 			using _value_type = value_type_of<Expr>;
 			using _field_spec = field_spec_t<_name_type, _value_type, true, false>;
 			using type = result_field_t<_value_type, Db, _field_spec>;

include/sqlpp11/exception.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/exists.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -27,6 +27,7 @@
 #ifndef SQLPP_EXISTS_H
 #define SQLPP_EXISTS_H
 
+#include <sqlpp11/char_sequence.h>
 #include <sqlpp11/boolean.h>
 
 namespace sqlpp
@@ -37,13 +38,14 @@ namespace sqlpp
 			public alias_operators<exists_t<Select>>
 	{
 		using _traits = make_traits<boolean, tag::is_expression, tag::is_selectable>;
-		using _recursive_traits = make_recursive_traits<Select>;
+		using _nodes = detail::type_vector<Select>;
 
 		static_assert(is_select_t<Select>::value, "exists() requires a select expression as argument");
 
-		struct _name_t
+		struct _alias_t
 		{
-			static constexpr const char* _get_name() { return "EXISTS"; }
+			static constexpr const char _literal[] =  "exists_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 			template<typename T>
 				struct _member_t
 				{
@@ -69,6 +71,7 @@ namespace sqlpp
 	template<typename Context, typename Select>
 		struct serializer_t<Context, exists_t<Select>>
 		{
+			using _serialize_check = serialize_check_of<Context, Select>;
 			using T = exists_t<Select>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/expression.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -44,7 +44,7 @@ namespace sqlpp
 			public alias_operators<binary_expression_t<Lhs, op::equal_to, Rhs>>
 		{
 			using _traits = make_traits<boolean, tag::is_expression>;
-			using _recursive_traits = make_recursive_traits<Lhs, Rhs>;
+			using _nodes = detail::type_vector<Lhs, Rhs>;
 			using _lhs_t = Lhs;
 			using _rhs_t = rhs_wrap_t<allow_tvin_t<Rhs>, trivial_value_is_null_t<_lhs_t>::value>;
 
@@ -66,12 +66,13 @@ namespace sqlpp
 	template<typename Context, typename Lhs, typename Rhs>
 		struct serializer_t<Context, equal_to_t<Lhs, Rhs>>
 		{
+			using _serialize_check = serialize_check_of<Context, Lhs, Rhs>;
 			using T = equal_to_t<Lhs, Rhs>;
 
 			static Context& _(const T& t, Context& context)
 			{
 				context << "(";
-				serialize(t._lhs, context);
+				serialize_operand(t._lhs, context);
 				if (t._rhs._is_null())
 				{
 					context << " IS NULL";
@@ -79,7 +80,7 @@ namespace sqlpp
 				else
 				{
 					context << "=";
-					serialize(t._rhs, context);
+					serialize_operand(t._rhs, context);
 				}
 				context << ")";
 				return context;
@@ -92,7 +93,7 @@ namespace sqlpp
 			public alias_operators<binary_expression_t<Lhs, op::not_equal_to, Rhs>>
 		{
 			using _traits = make_traits<boolean, tag::is_expression>;
-			using _recursive_traits = make_recursive_traits<Lhs, Rhs>;
+			using _nodes = detail::type_vector<Lhs, Rhs>;
 			using _lhs_t = Lhs;
 			using _rhs_t = rhs_wrap_t<allow_tvin_t<Rhs>, trivial_value_is_null_t<_lhs_t>::value>;
 
@@ -114,12 +115,13 @@ namespace sqlpp
 	template<typename Context, typename Lhs, typename Rhs>
 		struct serializer_t<Context, not_equal_to_t<Lhs, Rhs>>
 		{
+			using _serialize_check = serialize_check_of<Context, Lhs, Rhs>;
 			using T = not_equal_to_t<Lhs, Rhs>;
 
 			static Context& _(const T& t, Context& context)
 			{
 				context << "(";
-				serialize(t._lhs, context);
+				serialize_operand(t._lhs, context);
 				if (t._rhs._is_null())
 				{
 					context << " IS NOT NULL";
@@ -127,7 +129,7 @@ namespace sqlpp
 				else
 				{
 					context << "!=";
-					serialize(t._rhs, context);
+					serialize_operand(t._rhs, context);
 				}
 				context << ")";
 				return context;
@@ -140,7 +142,7 @@ namespace sqlpp
 			public alias_operators<unary_expression_t<op::logical_not, Rhs>>
 		{
 			using _traits = make_traits<boolean, tag::is_expression>;
-			using _recursive_traits = make_recursive_traits<Rhs>;
+			using _nodes = detail::type_vector<Rhs>;
 
 			unary_expression_t(Rhs rhs):
 				_rhs(rhs)
@@ -158,6 +160,7 @@ namespace sqlpp
 	template<typename Context, typename Rhs>
 		struct serializer_t<Context, logical_not_t<Rhs>>
 		{
+			using _serialize_check = serialize_check_of<Context, Rhs>;
 			using T = logical_not_t<Rhs>;
 
 			static Context& _(const T& t, Context& context)
@@ -165,13 +168,13 @@ namespace sqlpp
 				context << "(";
 				if (trivial_value_is_null_t<Rhs>::value)
 				{
-					serialize(t._rhs, context);
+					serialize_operand(t._rhs, context);
 					context << " IS NULL ";
 				}
 				else
 				{
 					context << "NOT ";
-					serialize(t._rhs, context);
+					serialize_operand(t._rhs, context);
 				}
 				context << ")";
 
@@ -185,7 +188,7 @@ namespace sqlpp
 			public alias_operators<binary_expression_t<Lhs, O, Rhs>>
 	{
 		using _traits = make_traits<value_type_of<O>, tag::is_expression>;
-		using _recursive_traits = make_recursive_traits<Lhs, Rhs>;
+		using _nodes = detail::type_vector<Lhs, Rhs>;
 
 		binary_expression_t(Lhs lhs, Rhs rhs):
 			_lhs(lhs), 
@@ -205,14 +208,15 @@ namespace sqlpp
 	template<typename Context, typename Lhs, typename O, typename Rhs>
 		struct serializer_t<Context, binary_expression_t<Lhs, O, Rhs>>
 		{
+			using _serialize_check = serialize_check_of<Context, Lhs, Rhs>;
 			using T = binary_expression_t<Lhs, O, Rhs>;
 
 			static Context& _(const T& t, Context& context)
 			{
 				context << "(";
-				serialize(t._lhs, context);
+				serialize_operand(t._lhs, context);
 				context << O::_name;
-				serialize(t._rhs, context);
+				serialize_operand(t._rhs, context);
 				context << ")";
 				return context;
 			}
@@ -224,7 +228,7 @@ namespace sqlpp
 			public alias_operators<unary_expression_t<O, Rhs>>
 	{
 		using _traits = make_traits<value_type_of<O>, tag::is_expression>;
-		using _recursive_traits = make_recursive_traits<Rhs>;
+		using _nodes = detail::type_vector<Rhs>;
 
 		unary_expression_t(Rhs rhs):
 			_rhs(rhs)
@@ -242,13 +246,14 @@ namespace sqlpp
 	template<typename Context, typename O, typename Rhs>
 		struct serializer_t<Context, unary_expression_t<O, Rhs>>
 		{
+			using _serialize_check = serialize_check_of<Context, Rhs>;
 			using T = unary_expression_t<O, Rhs>;
 
 			static Context& _(const T& t, Context& context)
 			{
 				context << "(";
 				context << O::_name;
-				serialize(t._rhs, context);
+				serialize_operand(t._rhs, context);
 				context << ")";
 				return context;
 			}

include/sqlpp11/expression_fwd.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/extra_tables.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,7 +28,7 @@
 #define SQLPP_EXTRA_TABLES_H
 
 #include <sqlpp11/type_traits.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 #include <sqlpp11/policy_update.h>
 
 namespace sqlpp
@@ -52,21 +52,9 @@ namespace sqlpp
 		struct extra_tables_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_extra_tables>;
-			struct _recursive_traits
+			using _nodes = detail::type_vector<>;
-			{
+			using _required_ctes = detail::make_joined_set_t<required_ctes_of<Tables>...>;
-				using _parameters = std::tuple<>;
+			using _extra_tables = detail::type_set<Tables...>;
-				using _required_tables = detail::type_set<>;
-				using _provided_outer_tables = detail::type_set<>;
-				using _provided_tables = detail::type_set<>;
-				using _extra_tables = detail::type_set<Tables...>;
-				using _tags = detail::type_set<>;
-			};
-
-			// FIXME: extra_tables must not require tables!
-
-			static_assert(sizeof...(Tables), "at least one table or join argument required in extra_tables()");
-			static_assert(not detail::has_duplicates<Tables...>::value, "at least one duplicate argument detected in extra_tables()");
-			static_assert(detail::all_t<is_table_t<Tables>::value...>::value, "at least one argument is not a table or join in extra_tables()");
 
 			// Data
 			using _data_t = extra_tables_data_t<Tables...>;
@@ -78,9 +66,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = extra_tables_data_t<Tables...>;
 
@@ -93,13 +81,8 @@ namespace sqlpp
 						{
 							return t.extra_tables;
 						}
-				};
 
-			// Additional methods for the statement
+					using _consistency_check = consistent_t;
-			template<typename Policies>
-				struct _methods_t
-				{
-					static void _check_consistency() {}
 				};
 		};
 
@@ -107,7 +90,7 @@ namespace sqlpp
 	struct no_extra_tables_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = no_data_t;
@@ -119,9 +102,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = no_data_t;
 
@@ -134,21 +117,42 @@ namespace sqlpp
 					{
 						return t.no_extra_tables;
 					}
-			};
 
-		template<typename Policies>
+				template<typename Check, typename T>
-			struct _methods_t
+					using _new_statement_t = new_statement_t<Check::value, Policies, no_extra_tables_t, T>;
-			{
-				template<typename T>
-					using _new_statement_t = new_statement<Policies, no_extra_tables_t, T>;
 
-				static void _check_consistency() {}
+				template<typename... T>
+					using _check = logic::all_t<is_table_t<T>::value...>;
 
-				template<typename... Args>
+				using _consistency_check = consistent_t;
-					auto extra_tables(Args...) const
+
-					-> _new_statement_t<extra_tables_t<Args...>>
+				template<typename... Tables>
+					auto extra_tables(Tables... tables) const
+					-> _new_statement_t<_check<Tables...>, extra_tables_t<Tables...>>
 					{
-						return { static_cast<const derived_statement_t<Policies>&>(*this), extra_tables_data_t<Args...>{} };
+						static_assert(_check<Tables...>::value, "at least one argument is not a table or join in extra_tables()");
+
+						return _extra_tables_impl<void>(_check<Tables...>{}, tables...);
+					}
+
+			private:
+				template<typename Database, typename... Tables>
+					auto _extra_tables_impl(const std::false_type&, Tables... tables) const
+					-> bad_statement;
+
+				template<typename Database, typename... Tables>
+					auto _extra_tables_impl(const std::true_type&, Tables...) const
+					-> _new_statement_t<std::true_type, extra_tables_t<Tables...>>
+					{
+						static_assert(required_tables_of<extra_tables_t<Tables...>>::size::value == 0, "at least one table depends on another table in extra_tables()");
+
+						static constexpr std::size_t _number_of_tables = detail::sum(provided_tables_of<Tables>::size::value...);
+						using _unique_tables = detail::make_joined_set_t<provided_tables_of<Tables>...>;
+						using _unique_table_names = detail::transform_set_t<name_of, _unique_tables>;
+						static_assert(_number_of_tables == _unique_tables::size::value, "at least one duplicate table detected in extra_tables()");
+						static_assert(_number_of_tables == _unique_table_names::size::value, "at least one duplicate table name detected in extra_tables()");
+
+						return { static_cast<const derived_statement_t<Policies>&>(*this), extra_tables_data_t<Tables...>{} };
 					}
 			};
 	};
@@ -157,6 +161,7 @@ namespace sqlpp
 	template<typename Context, typename Database, typename... Tables>
 		struct serializer_t<Context, extra_tables_data_t<Database, Tables...>>
 		{
+			using _serialize_check = serialize_check_of<Context, Tables...>;
 			using T = extra_tables_data_t<Database, Tables...>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/field_spec.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -38,9 +38,9 @@ namespace sqlpp
 						tag_if<tag::can_be_null, CanBeNull>,
 						tag_if<tag::null_is_trivial_value, NullIsTrivialValue>
 							>;
-			using _recursive_traits = make_recursive_traits<>;
+			using _nodes = detail::type_vector<>;
 
-			using _name_t = NameType;
+			using _alias_t = NameType;
 		};
 
 	template<typename AliasProvider, typename FieldSpecTuple>
@@ -56,9 +56,9 @@ namespace sqlpp
 				static constexpr bool _can_be_null = can_be_null_t<NamedExpr>::value;
 				static constexpr bool _depends_on_outer_table = detail::make_intersect_set_t<required_tables_of<NamedExpr>, typename Select::_used_outer_tables>::size::value > 0;
 
-				using type = field_spec_t<typename NamedExpr::_name_t, 
+				using type = field_spec_t<typename NamedExpr::_alias_t, 
 							value_type_of<NamedExpr>,
-							detail::any_t<_can_be_null, _depends_on_outer_table>::value,
+							logic::any_t<_can_be_null, _depends_on_outer_table>::value,
 							null_is_trivial_value_t<NamedExpr>::value>;
 			};
 

include/sqlpp11/floating_point.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/from.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -27,11 +27,12 @@
 #ifndef SQLPP_FROM_H
 #define SQLPP_FROM_H
 
+#include <sqlpp11/table_ref.h>
 #include <sqlpp11/type_traits.h>
 #include <sqlpp11/no_data.h>
 #include <sqlpp11/interpretable_list.h>
 #include <sqlpp11/interpret_tuple.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 #include <sqlpp11/detail/sum.h>
 #include <sqlpp11/policy_update.h>
 
@@ -60,7 +61,7 @@ namespace sqlpp
 		struct from_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_from>;
-			using _recursive_traits = make_recursive_traits<Tables...>;
+			using _nodes = detail::type_vector<Tables...>;
 			using _is_dynamic = is_database<Database>;
 
 			// Data
@@ -77,9 +78,11 @@ namespace sqlpp
 							static_assert(is_table_t<Table>::value, "invalid table argument in from::add()");
 							using _known_tables = detail::make_joined_set_t<provided_tables_of<Tables>...>; // Hint: Joins contain more than one table
 							using _known_table_names = detail::transform_set_t<name_of, _known_tables>;
-							static_assert(not detail::is_element_of<typename Table::_name_t, _known_table_names>::value, "Must not use the same table name twice in from()");
+							static_assert(not detail::is_element_of<typename Table::_alias_t, _known_table_names>::value, "Must not use the same table name twice in from()");
+							using _serialize_check = sqlpp::serialize_check_t<typename Database::_serializer_context_t, Table>;
+							_serialize_check::_();
 
-							using ok = detail::all_t<_is_dynamic::value, is_table_t<Table>::value>;
+							using ok = logic::all_t<_is_dynamic::value, is_table_t<Table>::value, _serialize_check::type::value>;
 
 							_add_impl(table, ok()); // dispatch to prevent compile messages after the static_assert
 						}
@@ -88,7 +91,7 @@ namespace sqlpp
 					template<typename Table>
 						void _add_impl(Table table, const std::true_type&)
 						{
-							return _data._dynamic_tables.emplace_back(table);
+							return _data._dynamic_tables.emplace_back(from_table(table));
 						}
 
 					template<typename Table>
@@ -98,9 +101,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = from_data_t<Database, Tables...>;
 
@@ -113,20 +116,16 @@ namespace sqlpp
 						{
 							return t.from;
 						}
-				};
 
-			// Additional methods for the statement
+					// FIXME: We might want to check if we have too many tables define in the FROM
-			template<typename Policies>
+					using _consistency_check = consistent_t;
-				struct _methods_t
-				{
-					static void _check_consistency() {}
 				};
 		};
 
 	struct no_from_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = no_data_t;
@@ -138,9 +137,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = no_data_t;
 
@@ -153,41 +152,45 @@ namespace sqlpp
 					{
 						return t.no_from;
 					}
-			};
 
-		// Additional methods for the statement
-		template<typename Policies>
-			struct _methods_t
-			{
 				using _database_t = typename Policies::_database_t;
-				template<typename T>
-					using _new_statement_t = new_statement<Policies, no_from_t, T>;
 
-				static void _check_consistency() {}
+				template<typename... T>
+					using _check = logic::all_t<is_table_t<T>::value...>;
+
+				template<typename Check, typename T>
+					using _new_statement_t = new_statement_t<Check::value, Policies, no_from_t, T>;
+
+				using _consistency_check = consistent_t;
 
 				template<typename... Tables>
 					auto from(Tables... tables) const
-					-> _new_statement_t<from_t<void, Tables...>>
+					-> _new_statement_t<_check<Tables...>, from_t<void, from_table_t<Tables>...>>
 					{
+						static_assert(_check<Tables...>::value, "at least one argument is not a table or join in from()");
 						static_assert(sizeof...(Tables), "at least one table or join argument required in from()");
-						return _from_impl<void>(tables...);
+						return _from_impl<void>(_check<Tables...>{}, tables...);
 					}
 
 				template<typename... Tables>
 					auto dynamic_from(Tables... tables) const
-					-> _new_statement_t<from_t<_database_t, Tables...>>
+					-> _new_statement_t<_check<Tables...>, from_t<_database_t, from_table_t<Tables>...>>
 					{
 						static_assert(not std::is_same<_database_t, void>::value, "dynamic_from must not be called in a static statement");
-						return _from_impl<_database_t>(tables...);
+						static_assert(_check<Tables...>::value, "at least one argument is not a table or join in from()");
+						return _from_impl<_database_t>(_check<Tables...>{}, tables...);
 					}
 
 			private:
 				template<typename Database, typename... Tables>
-					auto _from_impl(Tables... tables) const
+					auto _from_impl(const std::false_type&, Tables... tables) const
-					-> _new_statement_t<from_t<Database, Tables...>>
+					-> bad_statement;
+
+				template<typename Database, typename... Tables>
+					auto _from_impl(const std::true_type&, Tables... tables) const
+					-> _new_statement_t<std::true_type, from_t<Database, from_table_t<Tables>...>>
 					{
-						static_assert(detail::all_t<is_table_t<Tables>::value...>::value, "at least one argument is not a table or join in from()");
+						static_assert(required_tables_of<from_t<Database, Tables...>>::size::value == 0, "at least one table depends on another table in from()");
-						static_assert(required_tables_of<from_t<Database, Tables...>>::size::value == 0, "at least one table depends on another table");
 
 						static constexpr std::size_t _number_of_tables = detail::sum(provided_tables_of<Tables>::size::value...);
 						using _unique_tables = detail::make_joined_set_t<provided_tables_of<Tables>...>;
@@ -195,7 +198,7 @@ namespace sqlpp
 						static_assert(_number_of_tables == _unique_tables::size::value, "at least one duplicate table detected in from()");
 						static_assert(_number_of_tables == _unique_table_names::size::value, "at least one duplicate table name detected in from()");
 
-						return { static_cast<const derived_statement_t<Policies>&>(*this), from_data_t<Database, Tables...>{tables...} };
+						return { static_cast<const derived_statement_t<Policies>&>(*this), from_data_t<Database, from_table_t<Tables>...>{from_table(tables)...} };
 					}
 
 			};
@@ -205,6 +208,7 @@ namespace sqlpp
 	template<typename Context, typename Database, typename... Tables>
 		struct serializer_t<Context, from_data_t<Database, Tables...>>
 		{
+			using _serialize_check = serialize_check_of<Context, Tables...>;
 			using T = from_data_t<Database, Tables...>;
 
 			static Context& _(const T& t, Context& context)
@@ -220,6 +224,11 @@ namespace sqlpp
 			}
 		};
 
+	template<typename... T>
+		auto from(T&&... t) -> decltype(statement_t<void, no_from_t>().from(std::forward<T>(t)...))
+		{
+			return statement_t<void, no_from_t>().from(std::forward<T>(t)...);
+		}
 }
 
 #endif

include/sqlpp11/functions.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -31,7 +31,9 @@
 #include <sqlpp11/parameter_list.h>
 #include <sqlpp11/column_types.h>
 #include <sqlpp11/in.h>
+#include <sqlpp11/not_in.h>
 #include <sqlpp11/is_null.h>
+#include <sqlpp11/is_not_null.h>
 #include <sqlpp11/value_type.h>
 #include <sqlpp11/exists.h>
 #include <sqlpp11/any.h>
@@ -80,7 +82,7 @@ namespace sqlpp
 		struct value_list_t // to be used in .in() method
 		{
 			using _traits = make_traits<value_type_t<typename Container::value_type>, tag::is_expression>;
-			using _recursive_traits = make_recursive_traits<>;
+			using _nodes = detail::type_vector<>;
 
 			using _container_t = Container;
 
@@ -100,10 +102,16 @@ namespace sqlpp
 	template<typename Context, typename Container>
 		struct serializer_t<Context, value_list_t<Container>>
 		{
+			using _serialize_check = serialize_check_of<Context, wrap_operand_t<typename Container::value_type>>;
 			using T = value_list_t<Container>;
 
 			static Context& _(const T& t, Context& context)
 			{
+				if (t._container.size() == 1)
+				{
+					return serialize(value(*begin(t._container)), context);
+				}
+
 				bool first = true;
 				for (const auto& entry: t._container)
 				{
@@ -112,7 +120,7 @@ namespace sqlpp
 					else
 						context << ',';
 
-					serialize(value(entry), context);
+					serialize_operand(value(entry), context);
 				}
 				return context;
 			}
@@ -128,7 +136,7 @@ namespace sqlpp
 	template<typename T>
 		constexpr const char* get_sql_name(const T&) 
 		{
-			return T::_name_t::_get_name();
+			return name_of<T>::char_ptr();
 		}
 
 

include/sqlpp11/group_by.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -33,7 +33,7 @@
 #include <sqlpp11/interpret_tuple.h>
 #include <sqlpp11/interpretable_list.h>
 #include <sqlpp11/policy_update.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 
 namespace sqlpp
 {
@@ -55,21 +55,26 @@ namespace sqlpp
 			interpretable_list_t<Database> _dynamic_expressions;
 		};
 
+	struct assert_no_unknown_tables_in_group_by_t
+	{
+		using type = std::false_type;
+
+		template<typename T = void>
+		static void _()
+		{
+			static_assert(wrong_t<T>::value, "at least one group-by expression requires a table which is otherwise not known in the statement");
+		}
+	};
+
 	// GROUP BY
 	template<typename Database, typename... Expressions>
 		struct group_by_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_group_by>;
-			using _recursive_traits = make_recursive_traits<Expressions...>;
+			using _nodes = detail::type_vector<Expressions...>;
 
 			using _is_dynamic = is_database<Database>;
 
-			static_assert(_is_dynamic::value or sizeof...(Expressions), "at least one expression (e.g. a column) required in group_by()");
-
-			static_assert(not detail::has_duplicates<Expressions...>::value, "at least one duplicate argument detected in group_by()");
-
-			static_assert(detail::all_t<is_expression_t<Expressions>::value...>::value, "at least one argument is not an expression in group_by()");
-
 			// Data
 			using _data_t = group_by_data_t<Database, Expressions...>;
 
@@ -89,8 +94,10 @@ namespace sqlpp
 							static_assert(_is_dynamic::value, "add() must not be called for static group_by");
 							static_assert(is_expression_t<Expression>::value, "invalid expression argument in group_by::add()");
 							static_assert(TableCheckRequired::value or Policies::template _no_unknown_tables<Expression>::value, "expression uses tables unknown to this statement in group_by::add()");
+							using _serialize_check = sqlpp::serialize_check_t<typename Database::_serializer_context_t, Expression>;
+							_serialize_check::_();
 
-							using ok = detail::all_t<_is_dynamic::value, is_expression_t<Expression>::value>;
+							using ok = logic::all_t<_is_dynamic::value, is_expression_t<Expression>::value, _serialize_check::type::value>;
 
 							_add_impl(expression, ok()); // dispatch to prevent compile messages after the static_assert
 						}
@@ -108,9 +115,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = group_by_data_t<Database, Expressions...>;
 
@@ -123,12 +130,10 @@ namespace sqlpp
 						{
 							return t.group_by;
 						}
-				};
 
-			template<typename Policies>
+					using _consistency_check = typename std::conditional<Policies::template _no_unknown_tables<group_by_t>::value,
-				struct _methods_t
+								consistent_t,
-				{
+								assert_no_unknown_tables_in_group_by_t>::type;
-					static void _check_consistency() {}
 				};
 		};
 
@@ -136,7 +141,7 @@ namespace sqlpp
 	struct no_group_by_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = no_data_t;
@@ -148,9 +153,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = no_data_t;
 
@@ -163,31 +168,50 @@ namespace sqlpp
 					{
 						return t.no_group_by;
 					}
-			};
 
-		template<typename Policies>
-			struct _methods_t
-			{
 				using _database_t = typename Policies::_database_t;
-				template<typename T>
-					using _new_statement_t = new_statement<Policies, no_group_by_t, T>;
 
-				static void _check_consistency() {}
+				template<typename... T>
+					using _check = logic::all_t<is_expression_t<T>::value...>;
 
-				template<typename... Args>
+				template<typename Check, typename T>
-					auto group_by(Args... args) const
+					using _new_statement_t = new_statement_t<Check::value, Policies, no_group_by_t, T>;
-					-> _new_statement_t<group_by_t<void, Args...>>
+
+				using _consistency_check = consistent_t;
+
+				template<typename... Expressions>
+					auto group_by(Expressions... expressions) const
+					-> _new_statement_t<_check<Expressions...>, group_by_t<void, Expressions...>>
 					{
-						return { static_cast<const derived_statement_t<Policies>&>(*this), group_by_data_t<void, Args...>{args...} };
+						static_assert(sizeof...(Expressions), "at least one expression (e.g. a column) required in group_by()");
+						static_assert(_check<Expressions...>::value, "at least one argument is not an expression in group_by()");
+
+						return _group_by_impl<void>(_check<Expressions...>{}, expressions...);
 					}
 
-				template<typename... Args>
+				template<typename... Expressions>
-					auto dynamic_group_by(Args... args) const
+					auto dynamic_group_by(Expressions... expressions) const
-					-> _new_statement_t<group_by_t<_database_t, Args...>>
+					-> _new_statement_t<_check<Expressions...>, group_by_t<_database_t, Expressions...>>
 					{
 						static_assert(not std::is_same<_database_t, void>::value, "dynamic_group_by must not be called in a static statement");
-						return { static_cast<const derived_statement_t<Policies>&>(*this), group_by_data_t<_database_t, Args...>{args...} };
+						static_assert(_check<Expressions...>::value, "at least one argument is not an expression in group_by()");
+
+						return _group_by_impl<_database_t>(_check<Expressions...>{}, expressions...);
 					}
+
+			private:
+				template<typename Database, typename... Expressions>
+					auto _group_by_impl(const std::false_type&, Expressions... expressions) const
+					-> bad_statement;
+
+				template<typename Database, typename... Expressions>
+					auto _group_by_impl(const std::true_type&, Expressions... expressions) const
+						-> _new_statement_t<std::true_type, group_by_t<_database_t, Expressions...>>
+						{
+							static_assert(not detail::has_duplicates<Expressions...>::value, "at least one duplicate argument detected in group_by()");
+
+							return { static_cast<const derived_statement_t<Policies>&>(*this), group_by_data_t<Database, Expressions...>{expressions...} };
+						}
 			};
 	};
 
@@ -195,6 +219,7 @@ namespace sqlpp
 	template<typename Context, typename Database, typename... Expressions>
 		struct serializer_t<Context, group_by_data_t<Database, Expressions...>>
 		{
+			using _serialize_check = serialize_check_of<Context, Expressions...>;
 			using T = group_by_data_t<Database, Expressions...>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/having.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -32,7 +32,7 @@
 #include <sqlpp11/interpret_tuple.h>
 #include <sqlpp11/interpretable_list.h>
 #include <sqlpp11/policy_update.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 
 namespace sqlpp
 {
@@ -54,18 +54,26 @@ namespace sqlpp
 			interpretable_list_t<Database> _dynamic_expressions;
 		};
 
+	struct assert_no_unknown_tables_in_having_t
+	{
+		using type = std::false_type;
+
+		template<typename T = void>
+		static void _()
+		{
+			static_assert(wrong_t<T>::value, "at least one having-expression requires a table which is otherwise not known in the statement");
+		}
+	};
+
 	// HAVING
 	template<typename Database, typename... Expressions>
 		struct having_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_having>;
-			using _recursive_traits = make_recursive_traits<Expressions...>;
+			using _nodes = detail::type_vector<Expressions...>;
 
 			using _is_dynamic = is_database<Database>;
 
-			static_assert(_is_dynamic::value or sizeof...(Expressions), "at least one expression argument required in having()");
-			static_assert(detail::all_t<is_expression_t<Expressions>::value...>::value, "at least one argument is not an expression in having()");
-
 			// Data
 			using _data_t = having_data_t<Database, Expressions...>;
 
@@ -85,8 +93,10 @@ namespace sqlpp
 							static_assert(_is_dynamic::value, "having::add() can only be called for dynamic_having");
 							static_assert(is_expression_t<Expression>::value, "invalid expression argument in having::add()");
 							static_assert(not TableCheckRequired::value or Policies::template _no_unknown_tables<Expression>::value, "expression uses tables unknown to this statement in having::add()");
+							using _serialize_check = sqlpp::serialize_check_t<typename Database::_serializer_context_t, Expression>;
+							_serialize_check::_();
 
-							using ok = detail::all_t<_is_dynamic::value, is_expression_t<Expression>::value>;
+							using ok = logic::all_t<_is_dynamic::value, is_expression_t<Expression>::value, _serialize_check::type::value>;
 
 							_add_impl(expression, ok()); // dispatch to prevent compile messages after the static_assert
 						}
@@ -105,9 +115,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = having_data_t<Database, Expressions...>;
 
@@ -120,13 +130,10 @@ namespace sqlpp
 						{
 							return t.having;
 						}
-				};
 
-			// Additional methods for the statement
+					using _consistency_check = typename std::conditional<Policies::template _no_unknown_tables<having_t>::value,
-			template<typename Policies>
+								consistent_t,
-				struct _methods_t
+								assert_no_unknown_tables_in_having_t>::type;
-				{
-					static void _check_consistency() {}
 				};
 		};
 
@@ -134,7 +141,7 @@ namespace sqlpp
 	struct no_having_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = no_data_t;
@@ -146,9 +153,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = no_data_t;
 
@@ -161,31 +168,48 @@ namespace sqlpp
 					{
 						return t.no_having;
 					}
-			};
 
-		template<typename Policies>
-			struct _methods_t
-			{
 				using _database_t = typename Policies::_database_t;
-				template<typename T>
-					using _new_statement_t = new_statement<Policies, no_having_t, T>;
 
-				static void _check_consistency() {}
+				template<typename... T>
+					using _check = logic::all_t<is_expression_t<T>::value...>;
 
-				template<typename... Args>
+				template<typename Check, typename T>
-					auto having(Args... args) const
+					using _new_statement_t = new_statement_t<Check::value, Policies, no_having_t, T>;
-					-> _new_statement_t<having_t<void, Args...>>
+
+				using _consistency_check = consistent_t;
+
+				template<typename... Expressions>
+					auto having(Expressions... expressions) const
+					-> _new_statement_t<_check<Expressions...>, having_t<void, Expressions...>>
 					{
-						return { static_cast<const derived_statement_t<Policies>&>(*this), having_data_t<void, Args...>{args...} };
+						static_assert(_check<Expressions...>::value, "at least one argument is not an expression in having()");
+						static_assert(sizeof...(Expressions), "at least one expression argument required in having()");
+
+						return _having_impl<void>(_check<Expressions...>{}, expressions...);
 					}
 
-				template<typename... Args>
+				template<typename... Expressions>
-					auto dynamic_having(Args... args) const
+					auto dynamic_having(Expressions... expressions) const
-					-> _new_statement_t<having_t<_database_t, Args...>>
+					-> _new_statement_t<_check<Expressions...>, having_t<_database_t, Expressions...>>
 					{
+						static_assert(_check<Expressions...>::value, "at least one argument is not an expression in having()");
 						static_assert(not std::is_same<_database_t, void>::value, "dynamic_having must not be called in a static statement");
-						return { static_cast<const derived_statement_t<Policies>&>(*this), having_data_t<_database_t, Args...>{args...} };
+						return _having_impl<_database_t>(_check<Expressions...>{}, expressions...);
 					}
+
+			private:
+				template<typename Database, typename... Expressions>
+					auto _having_impl(const std::false_type&, Expressions... expressions) const
+					-> bad_statement;
+
+				template<typename Database, typename... Expressions>
+					auto _having_impl(const std::true_type&, Expressions... expressions) const
+					-> _new_statement_t<std::true_type, having_t<Database, Expressions...>>
+					{
+						return { static_cast<const derived_statement_t<Policies>&>(*this), having_data_t<_database_t, Expressions...>{expressions...} };
+					}
+
 			};
 	};
 
@@ -193,6 +217,7 @@ namespace sqlpp
 	template<typename Context, typename Database, typename... Expressions>
 		struct serializer_t<Context, having_data_t<Database, Expressions...>>
 		{
+			using _serialize_check = serialize_check_of<Context, Expressions...>;
 			using T = having_data_t<Database, Expressions...>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/hidden.h

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2013-2015, 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_HIDDEN_H
+#define SQLPP_HIDDEN_H
+
+namespace sqlpp
+{
+	template<typename Part>
+	struct hidden_t:
+		public Part
+	{
+		hidden_t(Part part):
+			Part(part)
+		{}
+
+		hidden_t(const hidden_t&) = default;
+		hidden_t(hidden_t&&) = default;
+		hidden_t& operator=(const hidden_t&) = default;
+		hidden_t& operator=(hidden_t&&) = default;
+		~hidden_t() = default;
+	};
+
+	template<typename Context, typename Part>
+		struct serializer_t<Context, hidden_t<Part>>
+		{
+			using _serialize_check = consistent_t;
+			using T = hidden_t<Part>;
+
+			static Context& _(const T& t, Context& context)
+			{
+				return context;
+			}
+		};
+
+	template<typename Part>
+		auto hidden(Part part)
+		-> hidden_t<Part>
+		{
+			return {part};
+		}
+}
+#endif

include/sqlpp11/in.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,26 +28,27 @@
 #define SQLPP_IN_H
 
 #include <sqlpp11/type_traits.h>
+#include <sqlpp11/char_sequence.h>
 #include <sqlpp11/boolean.h>
 #include <sqlpp11/in_fwd.h>
 #include <sqlpp11/detail/type_set.h>
 
 namespace sqlpp
 {
-	template<bool NotInverted, typename Operand, typename... Args>
+	template<typename Operand, typename... Args>
 		struct in_t:
-			public expression_operators<in_t<NotInverted, Operand, Args...>, boolean>,
+			public expression_operators<in_t<Operand, Args...>, boolean>,
-			public alias_operators<in_t<NotInverted, Operand, Args...>>
+			public alias_operators<in_t<Operand, Args...>>
 	{
 		using _traits = make_traits<boolean, tag::is_expression, tag::is_selectable>;
-		using _recursive_traits = make_recursive_traits<Operand, Args...>;
+		using _nodes = detail::type_vector<Operand, Args...>;
 
-		static constexpr bool _inverted = not NotInverted;
 		static_assert(sizeof...(Args) > 0, "in() requires at least one argument");
 
-		struct _name_t
+		struct _alias_t
 		{
-			static constexpr const char* _get_name() { return _inverted ? "NOT IN" : "IN"; }
+			static constexpr const char _literal[] =  "in_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 			template<typename T>
 				struct _member_t
 				{
@@ -70,18 +71,18 @@ namespace sqlpp
 		std::tuple<Args...> _args;
 	};
 
-	template<typename Context, bool NotInverted, typename Operand, typename... Args>
+	template<typename Context, typename Operand, typename... Args>
-		struct serializer_t<Context, in_t<NotInverted, Operand, Args...>>
+		struct serializer_t<Context, in_t<Operand, Args...>>
 		{
-			using T = in_t<NotInverted, Operand, Args...>;
+			using _serialize_check = serialize_check_of<Context, Args...>;
+			using T = in_t<Operand, Args...>;
 
 			static Context& _(const T& t, Context& context)
 			{
 				serialize(t._operand, context);
-				context << (t._inverted ? " NOT IN(" : " IN(");
+				context << " IN(";
 				if (sizeof...(Args) == 1)
-					serialize(std::get<0>(t._args), context); // FIXME: this is a bit of a hack until there is a better overall strategy for using braces
+					serialize(std::get<0>(t._args), context);
-				                                   // see https://github.com/rbock/sqlpp11/issues/18
 				else
 					interpret_tuple(t._args, ',', context);
 				context << ')';

include/sqlpp11/in_fwd.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -29,8 +29,10 @@
 
 namespace sqlpp
 {
-	template<bool NotInverted, typename Operand, typename... Args>
+	template<typename Operand, typename... Args>
 		struct in_t;
+	template<typename Operand, typename... Args>
+		struct not_in_t;
 
 }
 

include/sqlpp11/insert.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -44,41 +44,53 @@ namespace sqlpp
 	struct insert_t: public statement_name_t<insert_name_t>
 	{
 		using _traits = make_traits<no_value_t, tag::is_return_value>;
-		struct _name_t {};
+		struct _alias_t {};
 
-		template<typename Policies>
+		template<typename Statement>
 			struct _result_methods_t
 			{
-				using _statement_t = derived_statement_t<Policies>;
+				using _statement_t = Statement;
 
 				const _statement_t& _get_statement() const
 				{
 					return static_cast<const _statement_t&>(*this);
 				}
 
+				// Execute
+				template<typename Db, typename Composite>
+					auto _run(Db& db, const Composite& composite) const
+					-> decltype(db.insert(composite))
+					{
+						return db.insert(composite);
+					}
+
 				template<typename Db>
 					auto _run(Db& db) const -> decltype(db.insert(this->_get_statement()))
 					{
-						_statement_t::_check_consistency();
-
-						static_assert(_statement_t::_get_static_no_of_parameters() == 0, "cannot run insert directly with parameters, use prepare instead");
 						return db.insert(_get_statement());
 					}
 
-					 template<typename Db>
+				// Prepare
-					 auto _prepare(Db& db) const
+				template<typename Db, typename Composite>
-					 -> prepared_insert_t<Db, _statement_t>
+					auto _prepare(Db& db, const Composite& composite) const
-					 {
+					-> prepared_insert_t<Db, Composite>
-						 _statement_t::_check_consistency();
+					{
+						return {{}, db.prepare_insert(composite)};
+					}
 
-						 return {{}, db.prepare_insert(_get_statement())};
+				template<typename Db>
-					 }
+					auto _prepare(Db& db) const
+					-> prepared_insert_t<Db, _statement_t>
+					{
+						return {{}, db.prepare_insert(_get_statement())};
+					}
 			};
 	};
 
 	template<typename Context>
 		struct serializer_t<Context, insert_name_t>
 		{
+			using _serialize_check = consistent_t;
 			using T = insert_name_t;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/insert_value.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -50,7 +50,7 @@ namespace sqlpp
 				struct type
 				{
 					using _traits = make_traits<no_value_t, tag::is_noop>;
-					using _recursive_traits = make_recursive_traits<>;
+					using _nodes = detail::type_vector<>;
 				};
 			};
 	}
@@ -103,6 +103,7 @@ namespace sqlpp
 	template<typename Context, typename ValueType>
 		struct serializer_t<Context, insert_value_t<ValueType>>
 		{
+			using _serialize_check = serialize_check_of<Context, ValueType>;
 			using T = insert_value_t<ValueType>;
 
 			static Context& _(const T& t, Context& context)
@@ -115,7 +116,7 @@ namespace sqlpp
 				else if (t._is_default)
 					context << "DEFAULT";
 				else
-					serialize(t._value, context);
+					serialize_operand(t._value, context);
 				return context;
 			}
 		};

include/sqlpp11/insert_value_list.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,7 +28,7 @@
 #define SQLPP_INSERT_VALUE_LIST_H
 
 #include <sqlpp11/type_traits.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 #include <sqlpp11/assignment.h>
 #include <sqlpp11/interpretable_list.h>
 #include <sqlpp11/interpret_tuple.h>
@@ -41,20 +41,20 @@ namespace sqlpp
 {
 	namespace detail
 	{
-		template<typename... Args>
+		template<typename... Columns>
-			struct first_arg_impl
+			struct have_all_required_columns
 			{
-				static_assert(wrong_t<first_arg_impl>::value, "At least one argument required");
+				static constexpr bool value = false;
 			};
 
-		template<typename T, typename... Args>
+		template<typename First, typename... Columns>
-			struct first_arg_impl<T, Args...>
+			struct have_all_required_columns<First, Columns...>
 			{
-				using type = T;
+				using _table = typename First::_table;
+				using required_columns = typename _table::_required_insert_columns;
+				using set_columns = detail::make_type_set_t<First, Columns...>;
+				static constexpr bool value = detail::is_subset_of<required_columns, set_columns>::value;
 			};
-
-		template<typename... Args>
-			using first_arg_t = typename first_arg_impl<Args...>::type;
 	}
 
 	struct insert_default_values_data_t
@@ -64,7 +64,7 @@ namespace sqlpp
 	struct insert_default_values_t
 	{
 		using _traits = make_traits<no_value_t>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = insert_default_values_data_t;
@@ -76,9 +76,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = insert_default_values_data_t;
 
@@ -91,12 +91,8 @@ namespace sqlpp
 					{
 						return t.default_values;
 					}
-			};
 
-		template<typename Policies>
+				using _consistency_check = consistent_t;
-			struct _methods_t
-			{
-				static void _check_consistency() {}
 			};
 	}; 
 
@@ -122,11 +118,22 @@ namespace sqlpp
 			interpretable_list_t<Database> _dynamic_values;
 		};
 
+	struct assert_no_unknown_tables_in_insert_assignments_t
+	{
+		using type = std::false_type;
+
+		template<typename T = void>
+		static void _()
+		{
+			static_assert(wrong_t<T>::value, "at least one insert assignment requires a table which is otherwise not known in the statement");
+		}
+	};
+
 	template<typename Database, typename... Assignments>
 		struct insert_list_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_insert_list>;
-			using _recursive_traits = make_recursive_traits<lhs_t<Assignments>..., rhs_t<Assignments>...>;
+			using _nodes = detail::type_vector<lhs_t<Assignments>..., rhs_t<Assignments>...>;
 
 			using _is_dynamic = is_database<Database>;
 
@@ -157,10 +164,13 @@ namespace sqlpp
 							static_assert(not detail::is_element_of<lhs_t<Assignment>, _assigned_columns>::value, "Must not assign value to column twice");
 							static_assert(not must_not_insert_t<lhs_t<Assignment>>::value, "add() argument must not be used in insert");
 							static_assert(not TableCheckRequired::value or Policies::template _no_unknown_tables<Assignment>::value, "add() contains a column from a foreign table");
+							using _serialize_check = sqlpp::serialize_check_t<typename Database::_serializer_context_t, Assignment>;
+							_serialize_check::_();
 
-							using ok = detail::all_t<
+							using ok = logic::all_t<
 								_is_dynamic::value, 
-								is_assignment_t<Assignment>::value>;
+								is_assignment_t<Assignment>::value,
+								_serialize_check::type::value>;
 
 							_add_impl(assignment, ok()); // dispatch to prevent compile messages after the static_assert
 						}
@@ -179,9 +189,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = insert_list_data_t<Database, Assignments...>;
 
@@ -194,13 +204,10 @@ namespace sqlpp
 						{
 							return t.insert_list;
 						}
-				};
 
-			// Additional methods for the statement
+					using _consistency_check = typename std::conditional<Policies::template _no_unknown_tables<insert_list_t>::value,
-			template<typename Policies>
+								consistent_t,
-				struct _methods_t
+								assert_no_unknown_tables_in_insert_assignments_t>::type;
-				{
-					static void _check_consistency() {}
 				};
 
 		};
@@ -223,11 +230,22 @@ namespace sqlpp
 			std::vector<_value_tuple_t> _insert_values;
 		};
 
+	struct assert_no_unknown_tables_in_column_list_t
+	{
+		using type = std::false_type;
+
+		template<typename T = void>
+		static void _()
+		{
+			static_assert(wrong_t<T>::value, "at least one column requires a table which is otherwise not known in the statement");
+		}
+	};
+
 	template<typename... Columns>
 		struct column_list_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_column_list>;
-			using _recursive_traits = make_recursive_traits<Columns...>;
+			using _nodes = detail::type_vector<Columns...>;
 
 			using _value_tuple_t = typename column_list_data_t<Columns...>::_value_tuple_t;
 
@@ -242,13 +260,13 @@ namespace sqlpp
 					template<typename... Assignments>
 						void add(Assignments... assignments)
 						{
-							static_assert(detail::all_t<is_assignment_t<Assignments>::value...>::value, "add_values() arguments have to be assignments");
+							static_assert(logic::all_t<is_assignment_t<Assignments>::value...>::value, "add_values() arguments have to be assignments");
 							using _arg_value_tuple = std::tuple<insert_value_t<lhs_t<Assignments>>...>;
 							using _args_correct = std::is_same<_arg_value_tuple, _value_tuple_t>;
 							static_assert(_args_correct::value, "add_values() arguments do not match columns() arguments");
 
-							using ok = detail::all_t<
+							using ok = logic::all_t<
-								detail::all_t<is_assignment_t<Assignments>::value...>::value, 
+								logic::all_t<is_assignment_t<Assignments>::value...>::value, 
 								_args_correct::value>;
 
 							_add_impl(ok(), assignments...); // dispatch to prevent compile messages after the static_assert
@@ -267,9 +285,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = column_list_data_t<Columns...>;
 
@@ -282,21 +300,29 @@ namespace sqlpp
 						{
 							return t.values;
 						}
-				};
 
-			// Additional methods for the statement
+					using _consistency_check = typename std::conditional<Policies::template _no_unknown_tables<column_list_t>::value,
-			template<typename Policies>
+								consistent_t,
-				struct _methods_t
+								assert_no_unknown_tables_in_column_list_t>::type;
-				{
-					static void _check_consistency() {}
 				};
 		};
 
+	struct assert_insert_values_t
+	{
+		using type = std::false_type;
+
+		template<typename T = void>
+			static void _()
+			{
+				static_assert(wrong_t<T>::value, "insert values required, e.g. set(...) or default_values()");
+			}
+	};
+
 	// NO INSERT COLUMNS/VALUES YET
 	struct no_insert_value_list_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = no_data_t;
@@ -308,9 +334,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = no_data_t;
 
@@ -323,78 +349,90 @@ namespace sqlpp
 					{
 						return t.no_insert_values;
 					}
-			};
 
-		template<typename Policies>
-			struct _methods_t
-			{
 				using _database_t = typename Policies::_database_t;
-				template<typename T>
-					using _new_statement_t = new_statement<Policies, no_insert_value_list_t, T>;
 
-				static void _check_consistency() 
+				template<typename... T>
-				{
+					using _column_check = logic::all_t<is_column_t<T>::value...>;
-					static_assert(wrong_t<_methods_t>::value, "insert values required, e.g. set(...) or default_values()");
+
-				}
+				template<typename... T>
+					using _assignment_check = logic::all_t<is_assignment_t<T>::value...>;
+
+				template<typename Check, typename T>
+					using _new_statement_t = new_statement_t<Check::value, Policies, no_insert_value_list_t, T>;
+
+				using _consistency_check = assert_insert_values_t;
 
 				auto default_values() const
-					-> _new_statement_t<insert_default_values_t>
+					-> _new_statement_t<std::true_type, insert_default_values_t>
 					{
 						return { static_cast<const derived_statement_t<Policies>&>(*this), insert_default_values_data_t{} };
 					}
 
 				template<typename... Columns>
 					auto columns(Columns... columns) const
-					-> _new_statement_t<column_list_t<Columns...>>
+					-> _new_statement_t<_column_check<Columns...>, column_list_t<Columns...>>
 					{
+						static_assert(logic::all_t<is_column_t<Columns>::value...>::value, "at least one argument is not a column in columns()");
 						static_assert(sizeof...(Columns), "at least one column required in columns()");
-						static_assert(not detail::has_duplicates<Columns...>::value, "at least one duplicate argument detected in columns()");
-						static_assert(detail::all_t<is_column_t<Columns>::value...>::value, "at least one argument is not a column in columns()");
-						static_assert(detail::none_t<must_not_insert_t<Columns>::value...>::value, "at least one column argument has a must_not_insert tag in its definition");
-						using _column_required_tables = detail::make_joined_set_t<required_tables_of<Columns>...>;
-						static_assert(_column_required_tables::size::value == 1, "columns() contains columns from several tables");
 
-						using _table = typename detail::first_arg_t<Columns...>::_table;
+						return _columns_impl(_column_check<Columns...>{}, columns...);
-						using required_columns = typename _table::_required_insert_columns;
-						using set_columns = detail::make_type_set_t<Columns...>;
-						static_assert(detail::is_subset_of<required_columns, set_columns>::value, "At least one required column is missing in columns()");
-
-						return { static_cast<const derived_statement_t<Policies>&>(*this), column_list_data_t<Columns...>{columns...} };
 					}
 
 				template<typename... Assignments>
 					auto set(Assignments... assignments) const
-					-> _new_statement_t<insert_list_t<void, Assignments...>>
+					-> _new_statement_t<_assignment_check<Assignments...>, insert_list_t<void, Assignments...>>
 					{
+						static_assert(_assignment_check<Assignments...>::value, "at least one argument is not an assignment in set()");
 						static_assert(sizeof...(Assignments), "at least one assignment expression required in set()");
-						static_assert(detail::all_t<is_assignment_t<Assignments>::value...>::value, "at least one argument is not an assignment in set()");
 
-						using _table = typename lhs_t<detail::first_arg_t<Assignments...>>::_table;
+						return _set_impl<void>(_assignment_check<Assignments...>{}, assignments...);
-						using required_columns = typename _table::_required_insert_columns;
-						using columns = detail::make_type_set_t<lhs_t<Assignments>...>;
-						static_assert(detail::is_subset_of<required_columns, columns>::value, "At least one required column is missing in set()");
-						return _set_impl<void>(assignments...);
 					}
 
 				template<typename... Assignments>
 					auto dynamic_set(Assignments... assignments) const
-					-> _new_statement_t<insert_list_t<_database_t, Assignments...>>
+					-> _new_statement_t<_assignment_check<Assignments...>, insert_list_t<_database_t, Assignments...>>
 					{
+						static_assert(_assignment_check<Assignments...>::value, "at least one argument is not an assignment in set()");
 						static_assert(not std::is_same<_database_t, void>::value, "dynamic_set must not be called in a static statement");
-						static_assert(detail::all_t<is_assignment_t<Assignments>::value...>::value, "at least one argument is not an assignment in set()");
+
-						return _set_impl<_database_t>(assignments...);
+						return _set_impl<_database_t>(_assignment_check<Assignments...>{}, assignments...);
 					}
 			private:
+				template<typename... Columns>
+					auto _columns_impl(const std::false_type&, Columns... columns) const
+					-> bad_statement;
+
+				template<typename... Columns>
+					auto _columns_impl(const std::true_type&, Columns... columns) const
+					-> _new_statement_t<std::true_type, column_list_t<Columns...>>
+					{
+						static_assert(not detail::has_duplicates<Columns...>::value, "at least one duplicate argument detected in columns()");
+						static_assert(logic::none_t<must_not_insert_t<Columns>::value...>::value, "at least one column argument has a must_not_insert tag in its definition");
+						using _column_required_tables = detail::make_joined_set_t<required_tables_of<Columns>...>;
+						static_assert(_column_required_tables::size::value == 1, "columns() contains columns from several tables");
+
+						static_assert(detail::have_all_required_columns<Columns...>::value, "At least one required column is missing in columns()");
+
+						return { static_cast<const derived_statement_t<Policies>&>(*this), column_list_data_t<Columns...>{columns...} };
+					}
+
 				template<typename Database, typename... Assignments>
-					auto _set_impl(Assignments... assignments) const
+					auto _set_impl(const std::false_type&, Assignments... assignments) const
-					-> _new_statement_t<insert_list_t<Database, Assignments...>>
+					-> bad_statement;
+
+				template<typename Database, typename... Assignments>
+					auto _set_impl(const std::true_type&, Assignments... assignments) const
+					-> _new_statement_t<std::true_type, insert_list_t<Database, Assignments...>>
 					{
 						static_assert(not detail::has_duplicates<lhs_t<Assignments>...>::value, "at least one duplicate column detected in set()");
-						static_assert(detail::none_t<must_not_insert_t<lhs_t<Assignments>>::value...>::value, "at least one assignment is prohibited by its column definition in set()");
+						static_assert(logic::none_t<must_not_insert_t<lhs_t<Assignments>>::value...>::value, "at least one assignment is prohibited by its column definition in set()");
 
 						using _column_required_tables = detail::make_joined_set_t<required_tables_of<lhs_t<Assignments>>...>;
 						static_assert(sizeof...(Assignments) ? (_column_required_tables::size::value == 1) : true, "set() contains assignments for columns from several tables");
 
+						static_assert(not std::is_same<_database_t, void>::value or detail::have_all_required_columns<lhs_t<Assignments>...>::value, "At least one required column is missing in set()");
+
 						return { static_cast<const derived_statement_t<Policies>&>(*this), insert_list_data_t<Database, Assignments...>{assignments...} };
 					}
 			};
@@ -404,6 +442,7 @@ namespace sqlpp
 	template<typename Context>
 		struct serializer_t<Context, insert_default_values_data_t>
 		{
+			using _serialize_check = consistent_t;
 			using T = insert_default_values_data_t;
 
 			static Context& _(const T& t, Context& context)
@@ -416,6 +455,7 @@ namespace sqlpp
 	template<typename Context, typename... Columns>
 		struct serializer_t<Context, column_list_data_t<Columns...>>
 		{
+			using _serialize_check = serialize_check_of<Context, Columns...>;
 			using T = column_list_data_t<Columns...>;
 
 			static Context& _(const T& t, Context& context)
@@ -443,6 +483,7 @@ namespace sqlpp
 	template<typename Context, typename Database, typename... Assignments>
 		struct serializer_t<Context, insert_list_data_t<Database, Assignments...>>
 		{
+			using _serialize_check = serialize_check_of<Context, Assignments...>;
 			using T = insert_list_data_t<Database, Assignments...>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/integral.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/interpret.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/interpret_tuple.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -34,20 +34,19 @@
 
 namespace sqlpp
 {
-	template<typename Element, typename Separator, typename Context>
+	template<typename Element, typename Separator, typename Context, typename UseBraces>
-		static void interpret_tuple_element(const Element& element, const Separator& separator, Context& context, size_t index)
+		static void interpret_tuple_element(const Element& element, const Separator& separator, Context& context, const UseBraces&, size_t index)
 		{
 			if (index)
 				context << separator;
-			if (requires_braces_t<Element>::value)
+			if (UseBraces::value)
-				context << "(";
+				serialize_operand(element, context);
-			serialize(element, context);
+			else
-			if (requires_braces_t<Element>::value)
+				serialize(element, context);
-				context << ")";
 		}
 
-	template<typename Tuple, typename Separator, typename Context, size_t... Is>
+	template<typename Tuple, typename Separator, typename Context, typename UseBraces, size_t... Is>
-		auto interpret_tuple_impl(const Tuple& t, const Separator& separator, Context& context, const detail::index_sequence<Is...>&)
+		auto interpret_tuple_impl(const Tuple& t, const Separator& separator, Context& context, const UseBraces& useBraces, const detail::index_sequence<Is...>&)
 		-> Context&
 		{
 			// Note: A braced-init-list does guarantee the order of evaluation according to 12.6.1 [class.explicit.init] paragraph 2 and 8.5.4 [dcl.init.list] paragraph 4.
@@ -57,7 +56,7 @@ namespace sqlpp
 			using swallow = int[]; 
 			(void) swallow{
 				0, //workaround against -Wpedantic GCC warning "zero-size array 'int [0]'"
-				(interpret_tuple_element(std::get<Is>(t), separator, context, Is), 0)...};
+				(interpret_tuple_element(std::get<Is>(t), separator, context, useBraces, Is), 0)...};
 			return context;
 		}
 
@@ -65,7 +64,14 @@ namespace sqlpp
 		auto interpret_tuple(const Tuple& t, const Separator& separator, Context& context)
 		-> Context&
 		{
-			return interpret_tuple_impl(t, separator, context, detail::make_index_sequence<std::tuple_size<Tuple>::value>{});
+			return interpret_tuple_impl(t, separator, context, std::true_type{}, detail::make_index_sequence<std::tuple_size<Tuple>::value>{});
+		}
+
+	template<typename Tuple, typename Separator, typename Context>
+		auto interpret_tuple_without_braces(const Tuple& t, const Separator& separator, Context& context)
+		-> Context&
+		{
+			return interpret_tuple_impl(t, separator, context, std::false_type{}, detail::make_index_sequence<std::tuple_size<Tuple>::value>{});
 		}
 }
 

include/sqlpp11/interpretable.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -43,6 +43,7 @@ namespace sqlpp
 
 			template<typename T>
 				interpretable_t(T t):
+					_requires_braces(requires_braces_t<T>::value),
 					_impl(std::make_shared<_impl_t<T>>(t))
 			{}
 
@@ -71,6 +72,8 @@ namespace sqlpp
 				return _impl->interpret(context);
 			}
 
+			bool _requires_braces;
+
 		private:
 			struct _impl_base
 			{
@@ -114,11 +117,20 @@ namespace sqlpp
 	template<typename Context, typename Database>
 		struct serializer_t<Context, interpretable_t<Database>>
 		{
+			using _serialize_check = consistent_t;
 			using T = interpretable_t<Database>;
 
 			static Context& _(const T& t, Context& context)
 			{
-				t.serialize(context);
+				if (t._requires_braces)
+				{
+					context << '(';
+					t.serialize(context);
+					context << ')';
+				}
+				else
+					t.serialize(context);
+
 				return context;
 			}
 		};

include/sqlpp11/interpretable_list.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/interpreter.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/into.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -27,6 +27,7 @@
 #ifndef SQLPP_INTO_H
 #define SQLPP_INTO_H
 
+#include <sqlpp11/statement_fwd.h>
 #include <sqlpp11/type_traits.h>
 #include <sqlpp11/no_value.h>
 #include <sqlpp11/no_data.h>
@@ -58,14 +59,11 @@ namespace sqlpp
 		struct into_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_into>;
-			using _recursive_traits = make_recursive_traits<Table>;
+			using _nodes = detail::type_vector<Table>;
-
-			static_assert(is_table_t<Table>::value, "argument has to be a table");
-			static_assert(required_tables_of<Table>::size::value == 0, "table depends on another table");
 
 			using _data_t = into_data_t<Database, Table>;
 
-			struct _name_t {};
+			struct _alias_t {};
 
 			// Member implementation with data and methods
 			template <typename Policies>
@@ -74,9 +72,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = into_data_t<Database, Table>;
 
@@ -89,22 +87,28 @@ namespace sqlpp
 						{
 							return t.into;
 						}
-				};
 
-			// Additional methods for the statement
+					using _consistency_check = consistent_t;
-			template<typename Policies>
-				struct _methods_t
-				{
-					static void _check_consistency() {}
 				};
 
 		};
 
+	struct assert_into_t
+	{
+		using type = std::false_type;
+
+		template<typename T = void>
+			static void _()
+			{
+				static_assert(wrong_t<T>::value, "into() required");
+			}
+	};
+
 	// NO INTO YET
 	struct no_into_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = no_data_t;
@@ -116,9 +120,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = no_data_t;
 
@@ -131,25 +135,37 @@ namespace sqlpp
 					{
 						return t.no_into;
 					}
-			};
 
-		template<typename Policies>
-			struct _methods_t
-			{
 				using _database_t = typename Policies::_database_t;
+
 				template<typename T>
-					using _new_statement_t = new_statement<Policies, no_into_t, T>;
+					using _check = logic::all_t<is_table_t<T>::value>;
 
-				static void _check_consistency()
+				template<typename Check, typename T>
-				{
+					using _new_statement_t = new_statement_t<Check::value, Policies, no_into_t, T>;
-					static_assert(wrong_t<_methods_t>::value, "into() required");
-				}
 
-				template<typename... Args>
+				using _consistency_check = assert_into_t;
-					auto into(Args... args) const
+
-					-> _new_statement_t<into_t<void, Args...>>
+				template<typename Table>
+					auto into(Table table) const
+					-> _new_statement_t<_check<Table>, into_t<void, Table>>
 					{
-						return { static_cast<const derived_statement_t<Policies>&>(*this), into_data_t<void, Args...>{args...} };
+						static_assert(_check<Table>::value, "argument is not a table in into()");
+						return _into_impl<void>(_check<Table>{}, table);
+					}
+
+			private:
+				template<typename Database, typename Table>
+					auto _into_impl(const std::false_type&, Table table) const
+					-> bad_statement;
+
+				template<typename Database, typename Table>
+					auto _into_impl(const std::true_type&, Table table) const
+					-> _new_statement_t<std::true_type, into_t<Database, Table>>
+					{
+						static_assert(required_tables_of<into_t<Database, Table>>::size::value == 0, "argument depends on another table in into()");
+
+						return { static_cast<const derived_statement_t<Policies>&>(*this), into_data_t<Database, Table>{table} };
 					}
 			};
 	};
@@ -158,6 +174,7 @@ namespace sqlpp
 	template<typename Context, typename Database, typename Table>
 		struct serializer_t<Context, into_data_t<Database, Table>>
 		{
+			using _serialize_check = serialize_check_of<Context, Table>;
 			using T = into_data_t<Database, Table>;
 
 			static Context& _(const T& t, Context& context)
@@ -168,6 +185,11 @@ namespace sqlpp
 			}
 		};
 
+	template<typename T>
+		auto into(T&& t) -> decltype(statement_t<void, no_into_t>().into(std::forward<T>(t)))
+		{
+			return statement_t<void, no_into_t>().into(std::forward<T>(t));
+		}
 }
 
 #endif

include/sqlpp11/is_not_null.h

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2013-2015, 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_IS_NOT_NULL_H
+#define SQLPP_IS_NOT_NULL_H
+
+#include <sqlpp11/boolean.h>
+#include <sqlpp11/type_traits.h>
+#include <sqlpp11/char_sequence.h>
+#include <sqlpp11/detail/type_set.h>
+
+namespace sqlpp
+{
+	template<typename Operand>
+		struct is_not_null_t:
+			public expression_operators<is_not_null_t<Operand>, boolean>,
+			public alias_operators<is_not_null_t<Operand>>
+	{
+		using _traits = make_traits<boolean, tag::is_expression, tag::is_selectable>;
+		using _nodes = detail::type_vector<Operand>;
+
+		struct _alias_t
+		{
+			static constexpr const char _literal[] =  "is_not_null_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
+			template<typename T>
+				struct _member_t
+				{
+					T is_not_null;
+				};
+		};
+
+		is_not_null_t(Operand operand):
+			_operand(operand)
+		{}
+
+		is_not_null_t(const is_not_null_t&) = default;
+		is_not_null_t(is_not_null_t&&) = default;
+		is_not_null_t& operator=(const is_not_null_t&) = default;
+		is_not_null_t& operator=(is_not_null_t&&) = default;
+		~is_not_null_t() = default;
+
+		Operand _operand;
+	};
+
+	template<typename Context, typename Operand>
+		struct serializer_t<Context, is_not_null_t<Operand>>
+		{
+			using _serialize_check = serialize_check_of<Context, Operand>;
+			using T = is_not_null_t<Operand>;
+
+			static Context& _(const T& t, Context& context)
+			{
+				serialize_operand(t._operand, context);
+				context << " IS NOT NULL";
+				return context;
+			}
+		};
+
+}
+
+#endif

include/sqlpp11/is_null.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -29,27 +29,27 @@
 
 #include <sqlpp11/boolean.h>
 #include <sqlpp11/type_traits.h>
+#include <sqlpp11/char_sequence.h>
 #include <sqlpp11/detail/type_set.h>
 
 namespace sqlpp
 {
-	template<bool NotInverted, typename Operand>
+	template<typename Operand>
 		struct is_null_t:
-			public expression_operators<is_null_t<NotInverted, Operand>, boolean>,
+			public expression_operators<is_null_t<Operand>, boolean>,
-			public alias_operators<is_null_t<NotInverted, Operand>>
+			public alias_operators<is_null_t<Operand>>
 	{
 		using _traits = make_traits<boolean, tag::is_expression, tag::is_selectable>;
-		using _recursive_traits = make_recursive_traits<Operand>;
+		using _nodes = detail::type_vector<Operand>;
 
-		static constexpr bool _inverted = not NotInverted;
+		struct _alias_t
-
-		struct _name_t
 		{
-			static constexpr const char* _get_name() { return _inverted ? "IS NOT NULL" : "IS NULL"; }
+			static constexpr const char _literal[] =  "is_nnull_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 			template<typename T>
 				struct _member_t
 				{
-					T in;
+					T is_null;
 				};
 		};
 
@@ -66,15 +66,16 @@ namespace sqlpp
 		Operand _operand;
 	};
 
-	template<typename Context, bool NotInverted, typename Operand>
+	template<typename Context, typename Operand>
-		struct serializer_t<Context, is_null_t<NotInverted, Operand>>
+		struct serializer_t<Context, is_null_t<Operand>>
 		{
-			using T = is_null_t<NotInverted, Operand>;
+			using _serialize_check = serialize_check_of<Context, Operand>;
+			using T = is_null_t<Operand>;
 
 			static Context& _(const T& t, Context& context)
 			{
-				serialize(t._operand, context);
+				serialize_operand(t._operand, context);
-				context << (t._inverted ? " IS NOT NULL" : " IS NULL");
+				context << " IS NULL";
 				return context;
 			}
 		};

include/sqlpp11/is_null_fwd.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -29,8 +29,10 @@
 
 namespace sqlpp
 {
-	template<bool NotInverted, typename Operand>
+	template<typename Operand>
 		struct is_null_t;
+	template<typename Operand>
+		struct is_not_null_t;
 }
 
 #endif

include/sqlpp11/join.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -66,16 +66,8 @@ namespace sqlpp
 		struct join_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_table, tag::is_join>;
-			struct _recursive_traits
+			using _nodes = detail::type_vector<Lhs, Rhs>;
-			{
+			using _can_be_null = std::false_type;
-				using _required_tables = detail::make_joined_set_t<required_tables_of<Lhs>, required_tables_of<Rhs>>;
-				using _provided_tables = detail::make_joined_set_t<provided_tables_of<Lhs>, provided_tables_of<Rhs>>;
-				using _provided_outer_tables = typename JoinType::template _provided_outer_tables<Lhs, Rhs>;
-				using _extra_tables = detail::make_joined_set_t<extra_tables_of<Lhs>, extra_tables_of<Rhs>>;
-				using _parameters = detail::make_parameter_tuple_t<parameters_of<Lhs>, parameters_of<Rhs>>;
-				using _tags = detail::type_set<>;
-			};
-
 
 			static_assert(is_table_t<Lhs>::value, "lhs argument for join() has to be a table or join");
 			static_assert(is_table_t<Rhs>::value, "rhs argument for join() has to be a table");
@@ -84,7 +76,7 @@ namespace sqlpp
 
 			static_assert(detail::is_disjunct_from<provided_tables_of<Lhs>, provided_tables_of<Rhs>>::value, "joined tables must not be identical");
 
-			static_assert(_recursive_traits::_required_tables::size::value == 0, "joined tables must not depend on other tables");
+			static_assert(required_tables_of<join_t>::size::value == 0, "joined tables must not depend on other tables");
 
 			template<typename OnT> 
 				using set_on_t = join_t<JoinType, Lhs, Rhs, OnT>;
@@ -94,7 +86,7 @@ namespace sqlpp
 				-> set_on_t<on_t<void, Expr...>>
 				{
 					static_assert(is_noop<On>::value, "cannot call on() twice for a single join()");
-					static_assert(detail::all_t<is_expression_t<Expr>::value...>::value, "at least one argument is not an expression in on()");
+					static_assert(logic::all_t<is_expression_t<Expr>::value...>::value, "at least one argument is not an expression in on()");
 
 					return { _lhs, 
 						_rhs, 
@@ -145,6 +137,7 @@ namespace sqlpp
 	template<typename Context, typename JoinType, typename Lhs, typename Rhs, typename On>
 		struct serializer_t<Context, join_t<JoinType, Lhs, Rhs, On>>
 		{
+			using _serialize_check = serialize_check_of<Context, Lhs, Rhs, On>;
 			using T = join_t<JoinType, Lhs, Rhs, On>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/like.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -29,6 +29,7 @@
 
 #include <sqlpp11/boolean.h>
 #include <sqlpp11/type_traits.h>
+#include <sqlpp11/char_sequence.h>
 #include <sqlpp11/detail/type_set.h>
 
 namespace sqlpp
@@ -39,11 +40,12 @@ namespace sqlpp
 			public alias_operators<like_t<Operand, Pattern>>
 	{
 		using _traits = make_traits<boolean, tag::is_expression, tag::is_selectable>;
-		using _recursive_traits = make_recursive_traits<Operand, Pattern>;
+		using _nodes = detail::type_vector<Operand, Pattern>;
 
-		struct _name_t
+		struct _alias_t
 		{
-			static constexpr const char* _get_name() { return "LIKE"; }
+			static constexpr const char _literal[] =  "like_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 			template<typename T>
 				struct _member_t
 				{
@@ -71,11 +73,12 @@ namespace sqlpp
 	template<typename Context, typename Operand, typename Pattern>
 		struct serializer_t<Context, like_t<Operand, Pattern>>
 		{
+			using _serialize_check = serialize_check_of<Context, Operand, Pattern>;
 			using T = like_t<Operand, Pattern>;
 
 			static Context& _(const T& t, Context& context)
 			{
-				serialize(t._operand, context);
+				serialize_operand(t._operand, context);
 				context << " LIKE(";
 				serialize(t._pattern, context);
 				context << ")";

include/sqlpp11/limit.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -55,9 +55,7 @@ namespace sqlpp
 		struct limit_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_limit>;
-			using _recursive_traits = make_recursive_traits<Limit>;
+			using _nodes = detail::type_vector<Limit>;
-
-			static_assert(is_integral_t<Limit>::value, "limit requires an integral value or integral parameter");
 
 			// Data
 			using _data_t = limit_data_t<Limit>;
@@ -69,9 +67,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = limit_data_t<Limit>;
 
@@ -84,12 +82,8 @@ namespace sqlpp
 						{
 							return t.limit;
 						}
-				};
 
-			template<typename Policies>
+					using _consistency_check = consistent_t;
-				struct _methods_t
-				{
-					static void _check_consistency() {}
 				};
 		};
 
@@ -124,7 +118,7 @@ namespace sqlpp
 		struct dynamic_limit_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_limit>;
-			using _recursive_traits = make_recursive_traits<>;
+			using _nodes = detail::type_vector<>;
 
 			// Data
 			using _data_t = dynamic_limit_data_t<Database>;
@@ -138,6 +132,7 @@ namespace sqlpp
 						{
 							// FIXME: Make sure that Limit does not require external tables? Need to read up on SQL
 							using arg_t = wrap_operand_t<Limit>;
+							static_assert(is_integral_t<arg_t>::value, "limit requires an integral value or integral parameter");
 							_data._value = arg_t{value};
 							_data._initialized = true;
 						}
@@ -145,9 +140,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = dynamic_limit_data_t<Database>;
 
@@ -160,20 +155,15 @@ namespace sqlpp
 						{
 							return t.limit;
 						}
-				};
 
-			// Additional methods for the statement
+					using _consistency_check = consistent_t;
-			template<typename Policies>
-				struct _methods_t
-				{
-					static void _check_consistency() {}
 				};
 		};
 
 	struct no_limit_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = no_data_t;
@@ -185,9 +175,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = no_data_t;
 
@@ -200,30 +190,43 @@ namespace sqlpp
 					{
 						return t.no_limit;
 					}
-			};
 
-		template<typename Policies>
-			struct _methods_t
-			{
 				using _database_t = typename Policies::_database_t;
-				template<typename T>
-					using _new_statement_t = new_statement<Policies, no_limit_t, T>;
 
-				static void _check_consistency() {}
+				template<typename T>
+					using _check = is_integral_t<wrap_operand_t<T>>;
+
+				template<typename Check, typename T>
+					using _new_statement_t = new_statement_t<Check::value, Policies, no_limit_t, T>;
+
+				using _consistency_check = consistent_t;
 
 				template<typename Arg>
 					auto limit(Arg arg) const
-					-> _new_statement_t<limit_t<wrap_operand_t<Arg>>>
+					-> _new_statement_t<_check<Arg>, limit_t<wrap_operand_t<Arg>>>
 					{
-						return { static_cast<const derived_statement_t<Policies>&>(*this), limit_data_t<wrap_operand_t<Arg>>{{arg}} };
+						static_assert(_check<Arg>::value, "limit requires an integral value or integral parameter");
+						return _limit_impl(_check<Arg>{}, wrap_operand_t<Arg>{arg});
 					}
 
 				auto dynamic_limit() const
-					-> _new_statement_t<dynamic_limit_t<_database_t>>
+					-> _new_statement_t<std::true_type, dynamic_limit_t<_database_t>>
 					{
-						static_assert(not std::is_same<_database_t, void>::value, "dynamic_limit must not be called in a static statement");
 						return { static_cast<const derived_statement_t<Policies>&>(*this), dynamic_limit_data_t<_database_t>{} };
 					}
+
+			private:
+				template<typename Arg>
+					auto _limit_impl(const std::false_type&, Arg arg) const
+					-> bad_statement;
+
+				template<typename Arg>
+					auto _limit_impl(const std::true_type&, Arg arg) const
+					-> _new_statement_t<std::true_type, limit_t<Arg>>
+					{
+						return { static_cast<const derived_statement_t<Policies>&>(*this), limit_data_t<Arg>{arg} };
+					}
+
 			};
 	};
 
@@ -231,6 +234,7 @@ namespace sqlpp
 	template<typename Context, typename Database>
 		struct serializer_t<Context, dynamic_limit_data_t<Database>>
 		{
+			using _serialize_check = consistent_t;
 			using T = dynamic_limit_data_t<Database>;
 
 			static Context& _(const T& t, Context& context)
@@ -247,12 +251,13 @@ namespace sqlpp
 	template<typename Context, typename Limit>
 		struct serializer_t<Context, limit_data_t<Limit>>
 		{
+			using _serialize_check = serialize_check_of<Context, Limit>;
 			using T = limit_data_t<Limit>;
 
 			static Context& _(const T& t, Context& context)
 			{
 				context << " LIMIT ";
-				serialize(t._value, context);
+				serialize_operand(t._value, context);
 				return context;
 			}
 		};

include/sqlpp11/logic.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -32,7 +32,7 @@
 
 namespace sqlpp
 {
-	namespace detail
+	namespace logic
 	{
 		template<bool... B>
 			struct logic_helper;

include/sqlpp11/max.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,6 +28,7 @@
 #define SQLPP_MAX_H
 
 #include <sqlpp11/type_traits.h>
+#include <sqlpp11/char_sequence.h>
 
 namespace sqlpp
 {
@@ -37,11 +38,12 @@ namespace sqlpp
 			public alias_operators<max_t<Expr>>
 	{
 		using _traits = make_traits<value_type_of<Expr>, tag::is_expression, tag::is_selectable>;
-		using _recursive_traits = make_recursive_traits<Expr, aggregate_function>;
+		using _nodes = detail::type_vector<Expr, aggregate_function>;
 
-		struct _name_t
+		struct _alias_t
 		{
-			static constexpr const char* _get_name() { return "MAX"; }
+			static constexpr const char _literal[] =  "max_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 			template<typename T>
 				struct _member_t
 				{
@@ -67,6 +69,7 @@ namespace sqlpp
 	template<typename Context, typename Expr>
 		struct serializer_t<Context, max_t<Expr>>
 		{
+			using _serialize_check = serialize_check_of<Context, Expr>;
 			using T = max_t<Expr>;
 
 			static Context& _(const T& t, Context& context)
@@ -81,6 +84,7 @@ namespace sqlpp
 	template<typename T>
 		auto max(T t) -> max_t<wrap_operand_t<T>>
 		{
+			static_assert(not contains_aggregate_function_t<wrap_operand_t<T>>::value, "max() cannot be used on an aggregate function");
 			static_assert(is_expression_t<wrap_operand_t<T>>::value, "max() requires an expression as argument");
 			return { t };
 		}

include/sqlpp11/min.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,6 +28,7 @@
 #define SQLPP_MIN_H
 
 #include <sqlpp11/type_traits.h>
+#include <sqlpp11/char_sequence.h>
 
 namespace sqlpp
 {
@@ -37,11 +38,12 @@ namespace sqlpp
 			public alias_operators<min_t<Expr>>
 	{
 		using _traits = make_traits<value_type_of<Expr>, tag::is_expression, tag::is_selectable>;
-		using _recursive_traits = make_recursive_traits<Expr, aggregate_function>;
+		using _nodes = detail::type_vector<Expr, aggregate_function>;
 
-		struct _name_t
+		struct _alias_t
 		{
-			static constexpr const char* _get_name() { return "MIN"; }
+			static constexpr const char _literal[] =  "min_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
 			template<typename T>
 				struct _member_t
 				{
@@ -67,6 +69,7 @@ namespace sqlpp
 	template<typename Context, typename Expr>
 		struct serializer_t<Context, min_t<Expr>>
 		{
+			using _serialize_check = serialize_check_of<Context, Expr>;
 			using T = min_t<Expr>;
 
 			static Context& _(const T& t, Context& context)
@@ -81,6 +84,7 @@ namespace sqlpp
 	template<typename T>
 		auto min(T t) -> min_t<wrap_operand_t<T>>
 		{
+			static_assert(not contains_aggregate_function_t<wrap_operand_t<T>>::value, "min() cannot be used on an aggregate function");
 			static_assert(is_expression_t<wrap_operand_t<T>>::value, "min() requires an expression as argument");
 			return { t };
 		}

include/sqlpp11/multi_column.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,7 +28,7 @@
 #define SQLPP_MULTI_COLUMN_H
 
 #include <sqlpp11/no_value.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 #include <sqlpp11/detail/type_set.h>
 
 #include <sqlpp11/detail/copy_tuple_args.h>
@@ -42,9 +42,9 @@ namespace sqlpp
 		struct multi_column_t
 		{
 			using _traits = make_traits<no_value_t>;
-			using _recursive_traits = make_recursive_traits<Columns...>;
+			using _nodes = detail::type_vector<Columns...>;
 
-			static_assert(detail::all_t<is_selectable_t<Columns>::value...>::value, "multi_column parameters need to be named expressions");
+			static_assert(logic::all_t<is_selectable_t<Columns>::value...>::value, "multi_column parameters need to be named expressions");
 
 			multi_column_t(std::tuple<Columns...> columns):
 				_columns(columns)
@@ -73,11 +73,11 @@ namespace sqlpp
 		struct multi_column_alias_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_alias, tag::is_multi_column, tag::is_selectable>;
-			using _recursive_traits = make_recursive_traits<Columns...>;
+			using _nodes = detail::type_vector<Columns...>;
 
-			static_assert(detail::all_t<is_selectable_t<Columns>::value...>::value, "multi_column parameters need to be named expressions");
+			static_assert(logic::all_t<is_selectable_t<Columns>::value...>::value, "multi_column parameters need to be named expressions");
 
-			using _name_t = typename AliasProvider::_name_t;
+			using _alias_t = typename AliasProvider::_alias_t;
 
 			multi_column_alias_t(multi_column_t<void, Columns...> multi_column):
 				_columns(multi_column._columns)
@@ -103,6 +103,7 @@ namespace sqlpp
 	template<typename Context, typename... Columns>
 		struct serializer_t<Context, multi_column_t<void, Columns...>>
 		{
+			using _serialize_check = serialize_check_of<Context, Columns...>;
 			using T = multi_column_t<void, Columns...>;
 
 			static void _(const T& t, Context& context)
@@ -114,6 +115,7 @@ namespace sqlpp
 	template<typename Context, typename AliasProvider, typename... Columns>
 		struct serializer_t<Context, multi_column_alias_t<AliasProvider, Columns...>>
 		{
+			using _serialize_check = serialize_check_of<Context, Columns...>;
 			using T = multi_column_alias_t<AliasProvider, Columns...>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/named_interpretable.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -30,6 +30,7 @@
 #include <memory>
 #include <sqlpp11/serializer_context.h>
 #include <sqlpp11/parameter_list.h>
+#include <sqlpp11/char_sequence.h>
 
 namespace sqlpp
 {
@@ -41,6 +42,7 @@ namespace sqlpp
 
 			template<typename T>
 				named_interpretable_t(T t):
+					_requires_braces(requires_braces_t<T>::value),
 					_impl(std::make_shared<_impl_t<T>>(t))
 			{}
 
@@ -74,6 +76,8 @@ namespace sqlpp
 				return _impl->_get_name();
 			}
 
+			bool _requires_braces;
+
 		private:
 			struct _impl_base
 			{
@@ -111,7 +115,7 @@ namespace sqlpp
 
 				std::string _get_name() const
 				{
-					return T::_name_t::_get_name();
+					return name_of<T>::char_ptr();
 				}
 
 				T _t;
@@ -123,11 +127,20 @@ namespace sqlpp
 	template<typename Context, typename Database>
 		struct serializer_t<Context, named_interpretable_t<Database>>
 		{
+			using _serialize_check = consistent_t;
 			using T = named_interpretable_t<Database>;
 
 			static Context& _(const T& t, Context& context)
 			{
-				t.serialize(context);
+				if (t._requires_braces)
+				{
+					context << '(';
+					t.serialize(context);
+					context << ')';
+				}
+				else
+					t.serialize(context);
+
 				return context;
 			}
 		};

include/sqlpp11/no_data.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -37,6 +37,7 @@ namespace sqlpp
 	template<typename Context>
 		struct serializer_t<Context, no_data_t>
 		{
+			using _serialize_check = consistent_t;
 			using T = no_data_t;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/no_value.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/noop.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -30,24 +30,61 @@
 #include <type_traits>
 #include <sqlpp11/no_value.h>
 #include <sqlpp11/serializer.h>
+#include <sqlpp11/prepared_execute.h>
 
 namespace sqlpp
 {
 	struct noop 
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
-		struct _name_t {};
+		struct _alias_t {};
 
-		template<typename Policies>
+		template<typename Statement>
 			struct _result_methods_t
-			{};
+			{
+				using _statement_t = Statement;
+
+				const _statement_t& _get_statement() const
+				{
+					return static_cast<const _statement_t&>(*this);
+				}
+
+				// Execute
+				template<typename Db, typename Composite>
+					auto _run(Db& db, const Composite& composite) const	-> void
+					{
+						return db.execute(composite);
+					}
+
+				template<typename Db>
+					auto _run(Db& db) const -> void
+					{
+						return db.execute(_get_statement());
+					}
+
+				// Prepare
+				template<typename Db, typename Composite>
+					auto _prepare(Db& db, const Composite& composite) const
+					-> prepared_execute_t<Db, Composite>
+					{
+						return {{}, db.prepare_execute(composite)};
+					}
+
+				template<typename Db>
+					auto _prepare(Db& db) const
+					-> prepared_execute_t<Db, _statement_t>
+					{
+						return {{}, db.prepare_execute(_get_statement())};
+					}
+			};
 	};
 
 	template<typename Context>
 		struct serializer_t<Context, noop>
 		{
+			using _serialize_check = consistent_t;
 			using T = noop;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/noop_fwd.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,

include/sqlpp11/not_in.h

@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2013-2015, 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_NOT_IN_H
+#define SQLPP_NOT_IN_H
+
+#include <sqlpp11/type_traits.h>
+#include <sqlpp11/char_sequence.h>
+#include <sqlpp11/boolean.h>
+#include <sqlpp11/in_fwd.h>
+#include <sqlpp11/detail/type_set.h>
+
+namespace sqlpp
+{
+	template<typename Operand, typename... Args>
+		struct not_in_t:
+			public expression_operators<not_in_t<Operand, Args...>, boolean>,
+			public alias_operators<not_in_t<Operand, Args...>>
+	{
+		using _traits = make_traits<boolean, tag::is_expression, tag::is_selectable>;
+		using _nodes = detail::type_vector<Operand, Args...>;
+
+		static_assert(sizeof...(Args) > 0, "not_in() requires at least one argument");
+
+		struct _alias_t
+		{
+			static constexpr const char _literal[] =  "not_in_";
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>;
+			template<typename T>
+				struct _member_t
+				{
+					T not_in;
+				};
+		};
+
+		not_in_t(Operand operand, Args... args):
+			_operand(operand),
+			_args(args...)
+		{}
+
+		not_in_t(const not_in_t&) = default;
+		not_in_t(not_in_t&&) = default;
+		not_in_t& operator=(const not_in_t&) = default;
+		not_in_t& operator=(not_in_t&&) = default;
+		~not_in_t() = default;
+
+		Operand _operand;
+		std::tuple<Args...> _args;
+	};
+
+	template<typename Context, typename Operand, typename... Args>
+		struct serializer_t<Context, not_in_t<Operand, Args...>>
+		{
+			using _serialize_check = serialize_check_of<Context, Args...>;
+			using T = not_in_t<Operand, Args...>;
+
+			static Context& _(const T& t, Context& context)
+			{
+				serialize_operand(t._operand, context);
+				context << " NOT IN(";
+				if (sizeof...(Args) == 1)
+					serialize(std::get<0>(t._args), context);
+				else
+					interpret_tuple(t._args, ',', context);
+				context << ')';
+				return context;
+			}
+		};
+
+}
+
+#endif

include/sqlpp11/null.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -34,12 +34,13 @@ namespace sqlpp
 	struct null_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_expression, tag::is_sql_null>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 	};
 
 	template<typename Context>
 		struct serializer_t<Context, null_t>
 		{
+			using _serialize_check = consistent_t;
 			using Operand = null_t;
 
 			static Context& _(const Operand& t, Context& context)

include/sqlpp11/offset.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -55,7 +55,7 @@ namespace sqlpp
 		struct offset_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_offset>;
-			using _recursive_traits = make_recursive_traits<Offset>;
+			using _nodes = detail::type_vector<Offset>;
 
 			static_assert(is_integral_t<Offset>::value, "offset requires an integral value or integral parameter");
 
@@ -69,9 +69,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = offset_data_t<Offset>;
 
@@ -84,12 +84,8 @@ namespace sqlpp
 						{
 							return t.offset;
 						}
-				};
 
-			template<typename Policies>
+					using _consistency_check = consistent_t;
-				struct _methods_t
-				{
-					static void _check_consistency() {}
 				};
 		};
 
@@ -124,7 +120,7 @@ namespace sqlpp
 		struct dynamic_offset_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_offset>;
-			using _recursive_traits = make_recursive_traits<>;
+			using _nodes = detail::type_vector<>;
 
 			// Data
 			using _data_t = dynamic_offset_data_t<Database>;
@@ -138,6 +134,7 @@ namespace sqlpp
 						{
 							// FIXME: Make sure that Offset does not require external tables? Need to read up on SQL
 							using arg_t = wrap_operand_t<Offset>;
+							static_assert(is_integral_t<arg_t>::value, "offset requires an integral value or integral parameter");
 							_data._value = arg_t{value};
 							_data._initialized = true;
 						}
@@ -145,9 +142,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = dynamic_offset_data_t<Database>;
 
@@ -160,12 +157,8 @@ namespace sqlpp
 						{
 							return t.offset;
 						}
-				};
 
-			template<typename Policies>
+					using _consistency_check = consistent_t;
-				struct _methods_t
-				{
-					static void _check_consistency() {}
 
 					template<typename Offset>
 						void set_offset(Offset value)
@@ -184,7 +177,7 @@ namespace sqlpp
 	struct no_offset_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = no_data_t;
@@ -196,9 +189,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = no_data_t;
 
@@ -211,30 +204,44 @@ namespace sqlpp
 					{
 						return t.no_offset;
 					}
-			};
 
-		template<typename Policies>
-			struct _methods_t
-			{
 				using _database_t = typename Policies::_database_t;
-				template<typename T>
-					using _new_statement_t = new_statement<Policies, no_offset_t, T>;
 
-				static void _check_consistency() {}
+				template<typename T>
+					using _check = is_integral_t<wrap_operand_t<T>>;
+
+				template<typename Check, typename T>
+					using _new_statement_t = new_statement_t<Check::value, Policies, no_offset_t, T>;
+
+				using _consistency_check = consistent_t;
 
 				template<typename Arg>
 					auto offset(Arg arg) const
-					-> _new_statement_t<offset_t<wrap_operand_t<Arg>>>
+					-> _new_statement_t<_check<Arg>, offset_t<wrap_operand_t<Arg>>>
 					{
-						return { static_cast<const derived_statement_t<Policies>&>(*this), offset_data_t<wrap_operand_t<Arg>>{{arg}} };
+						static_assert(_check<Arg>::value, "offset requires an integral value or integral parameter");
+						return _offset_impl(_check<Arg>{}, wrap_operand_t<Arg>{arg});
 					}
 
 				auto dynamic_offset() const
-					-> _new_statement_t<dynamic_offset_t<_database_t>>
+					-> _new_statement_t<std::true_type, dynamic_offset_t<_database_t>>
 					{
 						static_assert(not std::is_same<_database_t, void>::value, "dynamic_offset must not be called in a static statement");
 						return { static_cast<const derived_statement_t<Policies>&>(*this), dynamic_offset_data_t<_database_t>{} };
 					}
+
+			private:
+				template<typename Arg>
+					auto _offset_impl(const std::false_type&, Arg arg) const
+					-> bad_statement;
+
+				template<typename Arg>
+					auto _offset_impl(const std::true_type&, Arg arg) const
+					-> _new_statement_t<std::true_type, offset_t<Arg>>
+					{
+						return { static_cast<const derived_statement_t<Policies>&>(*this), offset_data_t<Arg>{arg} };
+					}
+
 			};
 	};
 
@@ -242,12 +249,13 @@ namespace sqlpp
 	template<typename Context, typename Offset>
 		struct serializer_t<Context, offset_data_t<Offset>>
 		{
+			using _serialize_check = serialize_check_of<Context, Offset>;
 			using T = offset_data_t<Offset>;
 
 			static Context& _(const T& t, Context& context)
 			{
 				context << " OFFSET ";
-				serialize(t._value, context);
+				serialize_operand(t._value, context);
 				return context;
 			}
 		};
@@ -255,6 +263,7 @@ namespace sqlpp
 	template<typename Context, typename Database>
 		struct serializer_t<Context, dynamic_offset_data_t<Database>>
 		{
+			using _serialize_check = consistent_t;
 			using T = dynamic_offset_data_t<Database>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/on.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -30,43 +30,61 @@
 #include <sqlpp11/type_traits.h>
 #include <sqlpp11/interpret_tuple.h>
 #include <sqlpp11/interpretable_list.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 
 namespace sqlpp
 {
-	template<typename Database, typename... Expr>
+	template<typename Database, typename... Expressions>
 		struct on_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_on>;
-			using _recursive_traits = make_recursive_traits<Expr...>;
+			using _nodes = detail::type_vector<Expressions...>;
 
 			using _is_dynamic = is_database<Database>;
 
-			static_assert(_is_dynamic::value or sizeof...(Expr), "at least one expression argument required in on()");
+			static_assert(_is_dynamic::value or sizeof...(Expressions), "at least one expression argument required in on()");
 
-			template<typename E>
+			template<typename Expr>
-				void add(E expr)
+				void add(Expr expr)
 				{
-					static_assert(is_expression_t<E>::value, "invalid expression argument in add_on()");
+					static_assert(_is_dynamic::value, "on::add() must not be called for static on()");
-					_dynamic_expressions.emplace_back(expr);
+					static_assert(is_expression_t<Expr>::value, "invalid expression argument in on::add()");
+					using _serialize_check = sqlpp::serialize_check_t<typename Database::_serializer_context_t, Expr>;
+					_serialize_check::_();
+
+					using ok = logic::all_t<_is_dynamic::value, is_expression_t<Expr>::value, _serialize_check::type::value>;
+
+					_add_impl(expr, ok()); // dispatch to prevent compile messages after the static_assert
 				}
 
-			std::tuple<Expr...> _expressions;
+		private:
+			template<typename Expr>
+				void _add_impl(Expr expr, const std::true_type&)
+				{
+					return _dynamic_expressions.emplace_back(expr);
+				}
+
+			template<typename Expr>
+				void _add_impl(Expr expr, const std::false_type&);
+
+		public:
+			std::tuple<Expressions...> _expressions;
 			interpretable_list_t<Database> _dynamic_expressions;
 		};
 
-	template<typename Context, typename Database, typename... Expr>
+	template<typename Context, typename Database, typename... Expressions>
-		struct serializer_t<Context, on_t<Database, Expr...>>
+		struct serializer_t<Context, on_t<Database, Expressions...>>
 		{
-			using T = on_t<Database, Expr...>;
+			using _serialize_check = serialize_check_of<Context, Expressions...>;
+			using T = on_t<Database, Expressions...>;
 
 			static Context& _(const T& t, Context& context)
 			{
-				if (sizeof...(Expr) == 0 and t._dynamic_expressions.empty())
+				if (sizeof...(Expressions) == 0 and t._dynamic_expressions.empty())
 					return context;
 				context << " ON ";
 				interpret_tuple(t._expressions, " AND ", context);
-				if (sizeof...(Expr) and not t._dynamic_expressions.empty())
+				if (sizeof...(Expressions) and not t._dynamic_expressions.empty())
 					context << " AND ";
 				interpret_list(t._dynamic_expressions, " AND ", context);
 				return context;

include/sqlpp11/order_by.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -32,7 +32,7 @@
 #include <sqlpp11/interpret_tuple.h>
 #include <sqlpp11/interpretable.h>
 #include <sqlpp11/policy_update.h>
-#include <sqlpp11/detail/logic.h>
+#include <sqlpp11/logic.h>
 #include <sqlpp11/detail/type_set.h>
 
 namespace sqlpp
@@ -55,21 +55,26 @@ namespace sqlpp
 			interpretable_list_t<Database> _dynamic_expressions;
 		};
 
+	struct assert_no_unknown_tables_in_order_by_t
+	{
+		using type = std::false_type;
+
+		template<typename T = void>
+		static void _()
+		{
+			static_assert(wrong_t<T>::value, "at least one order-by expression requires a table which is otherwise not known in the statement");
+		}
+	};
+
 	// ORDER BY
 	template<typename Database, typename... Expressions>
 		struct order_by_t
 		{
 			using _traits = make_traits<no_value_t, tag::is_order_by>;
-			using _recursive_traits = make_recursive_traits<Expressions...>;
+			using _nodes = detail::type_vector<Expressions...>;
 
 			using _is_dynamic = is_database<Database>;
 
-			static_assert(_is_dynamic::value or sizeof...(Expressions), "at least one expression (e.g. a column) required in order_by()");
-
-			static_assert(not detail::has_duplicates<Expressions...>::value, "at least one duplicate argument detected in order_by()");
-
-			static_assert(detail::all_t<is_expression_t<Expressions>::value...>::value, "at least one argument is not an expression in order_by()");
-
 			// Data
 			using _data_t = order_by_data_t<Database, Expressions...>;
 
@@ -87,10 +92,12 @@ namespace sqlpp
 						void add(Expression expression)
 						{
 							static_assert(_is_dynamic::value, "add() must not be called for static order_by");
-							static_assert(is_expression_t<Expression>::value, "invalid expression argument in order_by::add()");
+							static_assert(is_sort_order_t<Expression>::value, "invalid expression argument in order_by::add()");
 							static_assert(TableCheckRequired::value or Policies::template _no_unknown_tables<Expression>::value, "expression uses tables unknown to this statement in order_by::add()");
+							using _serialize_check = sqlpp::serialize_check_t<typename Database::_serializer_context_t, Expression>;
+							_serialize_check::_();
 
-							using ok = detail::all_t<_is_dynamic::value, is_expression_t<Expression>::value>;
+							using ok = logic::all_t<_is_dynamic::value, is_sort_order_t<Expression>::value, _serialize_check::type::value>;
 
 							_add_impl(expression, ok()); // dispatch to prevent compile messages after the static_assert
 						}
@@ -108,9 +115,9 @@ namespace sqlpp
 					_data_t _data;
 				};
 
-			// Member template for adding the named member to a statement
+			// Base template to be inherited by the statement
 			template<typename Policies>
-				struct _member_t
+				struct _base_t
 				{
 					using _data_t = order_by_data_t<Database, Expressions...>;
 
@@ -123,12 +130,10 @@ namespace sqlpp
 						{
 							return t.order_by;
 						}
-				};
 
-			template<typename Policies>
+					using _consistency_check = typename std::conditional<Policies::template _no_unknown_tables<order_by_t>::value,
-				struct _methods_t
+								consistent_t,
-				{
+								assert_no_unknown_tables_in_order_by_t>::type;
-					static void _check_consistency() {}
 				};
 		};
 
@@ -136,7 +141,7 @@ namespace sqlpp
 	struct no_order_by_t
 	{
 		using _traits = make_traits<no_value_t, tag::is_noop>;
-		using _recursive_traits = make_recursive_traits<>;
+		using _nodes = detail::type_vector<>;
 
 		// Data
 		using _data_t = no_data_t;
@@ -148,9 +153,9 @@ namespace sqlpp
 				_data_t _data;
 			};
 
-		// Member template for adding the named member to a statement
+		// Base template to be inherited by the statement
 		template<typename Policies>
-			struct _member_t
+			struct _base_t
 			{
 				using _data_t = no_data_t;
 
@@ -163,31 +168,50 @@ namespace sqlpp
 					{
 						return t.no_order_by;
 					}
-			};
 
-		template<typename Policies>
-			struct _methods_t
-			{
 				using _database_t = typename Policies::_database_t;
-				template<typename T>
-					using _new_statement_t = new_statement<Policies, no_order_by_t, T>;
 
-				static void _check_consistency() {}
+				template<typename... T>
+					using _check = logic::all_t<is_sort_order_t<T>::value...>;
 
-				template<typename... Args>
+				template<typename Check, typename T>
-					auto order_by(Args... args) const
+					using _new_statement_t = new_statement_t<Check::value, Policies, no_order_by_t, T>;
-					-> _new_statement_t<order_by_t<void, Args...>>
+
+				using _consistency_check = consistent_t;
+
+				template<typename... Expressions>
+					auto order_by(Expressions... expressions) const
+					-> _new_statement_t<_check<Expressions...>, order_by_t<void, Expressions...>>
 					{
-						return { static_cast<const derived_statement_t<Policies>&>(*this), order_by_data_t<void, Args...>{args...} };
+						static_assert(sizeof...(Expressions), "at least one expression (e.g. a column) required in order_by()");
+						static_assert(_check<Expressions...>::value, "at least one argument is not a sort order in order_by()");
+
+						return _order_by_impl<void>(_check<Expressions...>{}, expressions...);
 					}
 
-				template<typename... Args>
+				template<typename... Expressions>
-					auto dynamic_order_by(Args... args) const
+					auto dynamic_order_by(Expressions... expressions) const
-					-> _new_statement_t<order_by_t<_database_t, Args...>>
+					-> _new_statement_t<_check<Expressions...>, order_by_t<_database_t, Expressions...>>
 					{
 						static_assert(not std::is_same<_database_t, void>::value, "dynamic_order_by must not be called in a static statement");
-						return { static_cast<const derived_statement_t<Policies>&>(*this), order_by_data_t<_database_t, Args...>{args...} };
+						static_assert(_check<Expressions...>::value, "at least one argument is not a sort order in order_by()");
+
+						return _order_by_impl<_database_t>(_check<Expressions...>{}, expressions...);
 					}
+
+			private:
+				template<typename Database, typename... Expressions>
+					auto _order_by_impl(const std::false_type&, Expressions... expressions) const
+					-> bad_statement;
+
+				template<typename Database, typename... Expressions>
+					auto _order_by_impl(const std::true_type&, Expressions... expressions) const
+						-> _new_statement_t<std::true_type, order_by_t<_database_t, Expressions...>>
+						{
+							static_assert(not detail::has_duplicates<Expressions...>::value, "at least one duplicate argument detected in order_by()");
+
+							return { static_cast<const derived_statement_t<Policies>&>(*this), order_by_data_t<Database, Expressions...>{expressions...} };
+						}
 			};
 	};
 
@@ -195,6 +219,7 @@ namespace sqlpp
 	template<typename Context, typename Database, typename... Expressions>
 		struct serializer_t<Context, order_by_data_t<Database, Expressions...>>
 		{
+			using _serialize_check = serialize_check_of<Context, Expressions...>;
 			using T = order_by_data_t<Database, Expressions...>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/parameter.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -38,15 +38,10 @@ namespace sqlpp
 			public expression_operators<parameter_t<ValueType, NameType>, ValueType>
 	{
 		using _traits = make_traits<ValueType, tag::is_parameter, tag::is_expression>;
-		struct _recursive_traits
+
-		{
+		using _nodes = detail::type_vector<>;
-			using _parameters = std::tuple<parameter_t>;
+		using _parameters = detail::type_vector<parameter_t>;
-			using _provided_tables = detail::type_set<>;
+		using _can_be_null = std::true_type;
-			using _provided_outer_tables = detail::type_set<>;
-			using _required_tables = detail::type_set<>;
-			using _extra_tables = detail::type_set<>;
-			using _tags = detail::type_set<tag::can_be_null>;
-		};
 
 		using _instance_t = member_t<NameType, parameter_value_t<ValueType>>;
 
@@ -63,6 +58,7 @@ namespace sqlpp
 	template<typename Context, typename ValueType, typename NameType>
 		struct serializer_t<Context, parameter_t<ValueType, NameType>>
 		{
+			using _serialize_check = consistent_t;
 			using T = parameter_t<ValueType, NameType>;
 
 			static Context& _(const T& t, Context& context)

include/sqlpp11/parameter_list.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -37,11 +37,11 @@ namespace sqlpp
 	template<typename T>
 		struct parameter_list_t
 		{
-			static_assert(wrong_t<parameter_list_t>::value, "Template parameter for parameter_list_t has to be a tuple");
+			static_assert(wrong_t<parameter_list_t>::value, "Template parameter for parameter_list_t has to be a type_vector");
 		};
 
 	template<typename... Parameter>
-		struct parameter_list_t<std::tuple<Parameter...>>: public Parameter::_instance_t...
+		struct parameter_list_t<detail::type_vector<Parameter...>>: public Parameter::_instance_t...
 		{
 			using _member_tuple_t = std::tuple<typename Parameter::_instance_t...>;
 			using size = std::integral_constant<std::size_t, sizeof...(Parameter)>;

include/sqlpp11/policy_update.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, Roland Bock
+ * Copyright (c) 2013-2015, Roland Bock
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without modification,
@@ -28,6 +28,7 @@
 #define SQLPP_POLICY_UPDATE_H
 
 #include <sqlpp11/wrong.h>
+#include <sqlpp11/bad_statement.h>
 
 namespace sqlpp
 {
@@ -53,6 +54,21 @@ namespace sqlpp
 	template<typename Policies, typename Needle, typename Replacement>
 		using new_statement = typename Policies::template _new_statement_t<Needle, Replacement>;
 
+	template<bool, typename Policies, typename Needle, typename Replacement>
+		struct new_statement_impl
+		{
+			using type = typename Policies::template _new_statement_t<Needle, Replacement>;
+		};
+
+	template<typename Policies, typename Needle, typename Replacement>
+		struct new_statement_impl<false, Policies, Needle, Replacement>
+		{
+			using type = bad_statement;
+		};
+
+	template<bool Check, typename Policies, typename Needle, typename Replacement>
+		using new_statement_t = typename new_statement_impl<Check, Policies, Needle, Replacement>::type;
+
 }
 
 #endif

include/sqlpp11/ppgen.h

@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) 2014-2015, niXman (i dot nixman dog gmail dot com)
+ * 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__ppgen_h
+#define _sqlpp__ppgen_h
+
+#include <boost/preprocessor/config/config.hpp>
+
+// enable the Clang support
+#if defined(__clang__) && !BOOST_PP_VARIADICS
+#	undef BOOST_PP_VARIADICS
+#	define BOOST_PP_VARIADICS 1
+#endif // defined(__clang__)
+
+// tools
+#include <sqlpp11/ppgen/tools/wrap_seq.h>
+#include <sqlpp11/ppgen/tools/tuple_pop_front.h>
+
+// table props
+#include <sqlpp11/ppgen/tblops/engine.h>
+#include <sqlpp11/ppgen/tblops/character_set.h>
+
+// col props
+#include <sqlpp11/ppgen/colops/auto_increment.h>
+#include <sqlpp11/ppgen/colops/blob.h>
+#include <sqlpp11/ppgen/colops/bool.h>
+#include <sqlpp11/ppgen/colops/comment.h>
+#include <sqlpp11/ppgen/colops/datetime.h>
+#include <sqlpp11/ppgen/colops/default.h>
+#include <sqlpp11/ppgen/colops/floating_point.h>
+#include <sqlpp11/ppgen/colops/index.h>
+#include <sqlpp11/ppgen/colops/integer.h>
+#include <sqlpp11/ppgen/colops/not_null.h>
+#include <sqlpp11/ppgen/colops/null.h>
+#include <sqlpp11/ppgen/colops/primary_key.h>
+#include <sqlpp11/ppgen/colops/text.h>
+#include <sqlpp11/ppgen/colops/timestamp.h>
+#include <sqlpp11/ppgen/colops/unique.h>
+#include <sqlpp11/ppgen/colops/varchar.h>
+
+// boost.preprocessor
+#include <boost/preprocessor/cat.hpp>
+#include <boost/preprocessor/facilities/expand.hpp>
+#include <boost/preprocessor/punctuation/comma_if.hpp>
+#include <boost/preprocessor/comparison/less.hpp>
+#include <boost/preprocessor/arithmetic/add.hpp>
+#include <boost/preprocessor/seq/for_each.hpp>
+#include <boost/preprocessor/seq/for_each_i.hpp>
+#include <boost/preprocessor/stringize.hpp>
+#include <boost/preprocessor/tuple/elem.hpp>
+#include <boost/preprocessor/tuple/size.hpp>
+#include <boost/preprocessor/tuple/to_seq.hpp>
+
+/***************************************************************************/
+// tools
+
+#define SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table) \
+	BOOST_PP_TUPLE_ELEM(0, BOOST_PP_EXPAND table)
+
+#define SQLPP_DECLARE_TABLE_GET_TABLE_PROPS(table) \
+	SQLPP_BOOST_PP_TUPLE_POP_FRONT(BOOST_PP_EXPAND table)
+
+#define SQLPP_DECLARE_COLUMN_GET_COLUMN_NAME(col) \
+	BOOST_PP_TUPLE_ELEM(0, col)
+
+#define SQLPP_DECLARE_TABLE_ENUM_COLUMNS(unused, table, elem) \
+	,table::SQLPP_DECLARE_COLUMN_GET_COLUMN_NAME(elem)
+
+/***************************************************************************/
+// columns
+
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS_AUX(unused, size, idx, elem) \
+	BOOST_PP_CAT( \
+		 SQLPP_DECLARE_COLUMN_GEN_TRAITS_ \
+		,BOOST_PP_CAT(SQLPP_DECLARE_COLUMN_GET_TRAITS_LAZY_, elem) \
+	)(elem) \
+	BOOST_PP_COMMA_IF(BOOST_PP_LESS(BOOST_PP_ADD(idx, 1), size))
+
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS(props) \
+	BOOST_PP_SEQ_FOR_EACH_I( \
+		 SQLPP_DECLARE_COLUMN_GEN_TRAITS_AUX \
+		,BOOST_PP_TUPLE_SIZE(props) \
+		,BOOST_PP_TUPLE_TO_SEQ(props) \
+	)
+
+#define SQLPP_DECLARE_COLUMN(unused, data, elem) \
+	struct SQLPP_DECLARE_COLUMN_GET_COLUMN_NAME(elem) { \
+		struct _alias_t { \
+			static constexpr const char _literal[] = \
+				BOOST_PP_STRINGIZE(SQLPP_DECLARE_COLUMN_GET_COLUMN_NAME(elem)); \
+			using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>; \
+			\
+			template<typename T> \
+			struct _member_t { \
+				T SQLPP_DECLARE_COLUMN_GET_COLUMN_NAME(elem); \
+				\
+				T& operator()() { return SQLPP_DECLARE_COLUMN_GET_COLUMN_NAME(elem); } \
+				const T& operator()() const { return SQLPP_DECLARE_COLUMN_GET_COLUMN_NAME(elem); } \
+			}; /* struct _member_t */ \
+		}; /* struct _alias_t */ \
+		\
+		using _traits = sqlpp::make_traits< \
+			SQLPP_DECLARE_COLUMN_GEN_TRAITS(SQLPP_BOOST_PP_TUPLE_POP_FRONT(elem)) \
+		>; \
+		\
+	}; /* struct SQLPP_DECLARE_COLUMN_GET_COLUMN_NAME(elem) */
+
+/***************************************************************************/
+// table props
+
+#define SQLPP_DECLARE_TABLE_GEN_PROPS_AUX(unused1, unused2, elem) \
+	BOOST_PP_CAT( \
+		 SQLPP_DECLARE_TABLE_GEN_ \
+		,BOOST_PP_CAT(SQLPP_DECLARE_TABLE_GET_PROC_LAZY_, elem) \
+	)(elem)
+
+#define SQLPP_DECLARE_TABLE_GEN_PROPS(table) \
+	BOOST_PP_SEQ_FOR_EACH( \
+		 SQLPP_DECLARE_TABLE_GEN_PROPS_AUX \
+		,~ \
+		,BOOST_PP_TUPLE_TO_SEQ(SQLPP_BOOST_PP_TUPLE_POP_FRONT(table)) \
+	)
+
+/***************************************************************************/
+// main
+
+#define SQLPP_DECLARE_TABLE_IMPL(table, cols) \
+	namespace SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table) { \
+		namespace BOOST_PP_CAT(SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table), _) { \
+			BOOST_PP_SEQ_FOR_EACH( \
+				 SQLPP_DECLARE_COLUMN \
+				,~ \
+				,cols \
+			) \
+		} /* namespace BOOST_PP_CAT(SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table), _) */ \
+		\
+		struct SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table) \
+			: sqlpp::table_t< \
+				SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table) \
+				BOOST_PP_SEQ_FOR_EACH( \
+					 SQLPP_DECLARE_TABLE_ENUM_COLUMNS \
+					,BOOST_PP_CAT(SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table), _) \
+					,cols \
+				) \
+			> \
+		{ \
+			BOOST_PP_IF( \
+				 BOOST_PP_LESS(BOOST_PP_TUPLE_SIZE(table), 2) \
+				,BOOST_PP_TUPLE_EAT() \
+				,SQLPP_DECLARE_TABLE_GEN_PROPS \
+			)(BOOST_PP_EXPAND table) \
+		\
+			struct _alias_t { \
+				static constexpr const char _literal[] = \
+					BOOST_PP_STRINGIZE(SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table)); \
+				using _name_t = sqlpp::make_char_sequence<sizeof(_literal), _literal>; \
+				\
+				template<typename T> \
+				struct _member_t { \
+					T SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table); \
+					\
+					T& operator()() { return SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table); } \
+					const T& operator()() const { return SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table); } \
+					\
+				}; /* struct _member_t */ \
+				\
+			}; /* struct _alias_t */ \
+			\
+		}; /* struct SQLPP_DECLARE_TABLE_GET_TABLE_NAME(table) */ \
+	\
+	}
+
+/***************************************************************************/
+
+#define SQLPP_DECLARE_TABLE(table, cols) \
+	SQLPP_DECLARE_TABLE_IMPL( \
+		 BOOST_PP_CAT(SQLPP_WRAP_SEQUENCE_X table, 0) \
+		,BOOST_PP_CAT(SQLPP_WRAP_SEQUENCE_X cols, 0) \
+	)
+
+/***************************************************************************/
+
+#endif // _sqlpp__ppgen_h

include/sqlpp11/ppgen/colops/auto_increment.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2014-2015, niXman (i dot nixman dog gmail dot com)
+ * 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__ppgen__colops__auto_increment_h
+#define _sqlpp__ppgen__colops__auto_increment_h
+
+#define SQLPP_DECLARE_COLUMN_GET_TRAITS_LAZY_SQLPP_AUTO_INCREMENT \
+	PROC_SQLPP_AUTO_INCREMENT
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS_PROC_SQLPP_AUTO_INCREMENT(...) \
+	sqlpp::tag::must_not_update
+
+#endif // _sqlpp__ppgen__colops__auto_increment_h

include/sqlpp11/ppgen/colops/blob.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2014-2015, niXman (i dot nixman dog gmail dot com)
+ * 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__ppgen__colops__blob_h
+#define _sqlpp__ppgen__colops__blob_h
+
+#define SQLPP_DECLARE_COLUMN_GET_TRAITS_LAZY_tinyblob \
+	PROC_tinyblob
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS_PROC_tinyblob(...) \
+	sqlpp::blob
+
+#define SQLPP_DECLARE_COLUMN_GET_TRAITS_LAZY_blob \
+	PROC_blob
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS_PROC_blob(...) \
+	sqlpp::blob
+
+#define SQLPP_DECLARE_COLUMN_GET_TRAITS_LAZY_mediumblob \
+	PROC_mediumblob
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS_PROC_mediumblob(...) \
+	sqlpp::blob
+
+#define SQLPP_DECLARE_COLUMN_GET_TRAITS_LAZY_longblob \
+	PROC_longblob
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS_PROC_longblob(...) \
+	sqlpp::blob
+
+#endif // _sqlpp__ppgen__colops__blob_h

include/sqlpp11/ppgen/colops/bool.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2014-2015, niXman (i dot nixman dog gmail dot com)
+ * 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__ppgen__colops__bool_h
+#define _sqlpp__ppgen__colops__bool_h
+
+#define SQLPP_DECLARE_COLUMN_GET_TRAITS_LAZY_bool \
+	PROC_bool
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS_PROC_bool(...) \
+	sqlpp::boolean
+
+#endif // _sqlpp__ppgen__colops__bool_h

include/sqlpp11/ppgen/colops/comment.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2014-2015, niXman (i dot nixman dog gmail dot com)
+ * 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__ppgen__colops__comment_h
+#define _sqlpp__ppgen__colops__comment_h
+
+#define SQLPP_DECLARE_COLUMN_GET_TRAITS_LAZY_SQLPP_COMMENT(str) \
+	PROC_SQLPP_COMMENT
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS_PROC_SQLPP_COMMENT(str) \
+	[COMMENT is not implemented]
+
+#endif // _sqlpp__ppgen__colops__comment_h

include/sqlpp11/ppgen/colops/datetime.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2014-2015, niXman (i dot nixman dog gmail dot com)
+ * 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__ppgen__colops__datetime_h
+#define _sqlpp__ppgen__colops__datetime_h
+
+#define SQLPP_DECLARE_COLUMN_GET_TRAITS_LAZY_datetime \
+	PROC_datetime
+#define SQLPP_DECLARE_COLUMN_GEN_TRAITS_PROC_datetime(...) \
+	[datetime is not implemented]
+
+#endif // _sqlpp__ppgen__colops__datetime_h