Fixed run_check and prepared_check for custom query and prepared statemtents

include/sqlpp11/custom_query.h

@@ -56,6 +56,12 @@ namespace sqlpp
 		using _traits = make_traits<no_value_t>;
 		using _recursive_traits = make_recursive_traits<Parts...>;
 
+		using _parameter_check = typename std::conditional<std::tuple_size<typename _recursive_traits::_parameters>::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...)
 		{}
@@ -70,20 +76,17 @@ namespace sqlpp
 		custom_query_t& operator=(custom_query_t&&) = default;
 		~custom_query_t() = default;
 
-		using _consistency_check = consistent_t;
-
 		template<typename Db>
 		auto _run(Db& db) const	-> decltype(std::declval<_methods_t>()._run(db, *this))
 		{
-			static_assert(_get_static_no_of_parameters() == 0, "cannot run execute directly with parameters, use prepare instead");
-			_run_check{};
+			_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{};
+			_prepare_check::_();
 			return _methods_t::_prepare(db, *this);
 		}
 

include/sqlpp11/prepared_execute.h

@@ -38,6 +38,8 @@ namespace sqlpp
 			using _parameter_list_t = make_parameter_list_t<Statement>;
 			using _prepared_statement_t = typename Db::_prepared_statement_t;
 
+			using _run_check = consistent_t;
+
 			auto _run(Db& db) const
 				-> void
 				{

include/sqlpp11/prepared_insert.h

@@ -38,6 +38,8 @@ namespace sqlpp
 			using _parameter_list_t = make_parameter_list_t<Insert>;
 			using _prepared_statement_t = typename Db::_prepared_statement_t;
 
+			using _run_check = consistent_t;
+
 			auto _run(Db& db) const
 				-> size_t
 				{

include/sqlpp11/prepared_remove.h

@@ -38,6 +38,8 @@ namespace sqlpp
 			using _parameter_list_t = make_parameter_list_t<Remove>;
 			using _prepared_statement_t = typename Db::_prepared_statement_t;
 
+			using _run_check = consistent_t;
+
 			auto _run(Db& db) const
 				-> size_t
 				{

include/sqlpp11/prepared_select.h

@@ -40,6 +40,8 @@ namespace sqlpp
 			using _dynamic_names_t = typename Statement::_dynamic_names_t;
 			using _prepared_statement_t = typename Database::_prepared_statement_t;
 
+			using _run_check = consistent_t;
+
 			auto _run(Database& db) const
 				-> result_t<decltype(db.run_prepared_select(*this)), _result_row_t>
 				{

include/sqlpp11/prepared_update.h

@@ -38,6 +38,8 @@ namespace sqlpp
 			using _parameter_list_t = make_parameter_list_t<Update>;
 			using _prepared_statement_t = typename Db::_prepared_statement_t;
 
+			using _run_check = consistent_t;
+
 			auto _run(Db& db) const
 				-> size_t
 				{