Added factory functions for several select sub clauses

include/sqlpp11/group_by.h

@@ -271,6 +271,19 @@ namespace sqlpp
       return context;
     }
   };
+
+  template <typename... T>
+  auto group_by(T&&... t) -> decltype(statement_t<void, no_group_by_t>().group_by(std::forward<T>(t)...))
+  {
+    return statement_t<void, no_group_by_t>().group_by(std::forward<T>(t)...);
+  }
+
+  template <typename Database, typename... T>
+  auto dynamic_group_by(const Database&, T&&... t)
+      -> decltype(statement_t<Database, no_group_by_t>().dynamic_group_by(std::forward<T>(t)...))
+  {
+    return statement_t<Database, no_group_by_t>().dynamic_group_by(std::forward<T>(t)...);
+  }
 }
 
 #endif

include/sqlpp11/limit.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2015, Roland Bock
+ * Copyright (c) 2013-2016, Roland Bock
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -312,6 +312,18 @@ namespace sqlpp
       return context;
     }
   };
+
+  template <typename T>
+  auto limit(T&& t) -> decltype(statement_t<void, no_limit_t>().limit(std::forward<T>(t)))
+  {
+    return statement_t<void, no_limit_t>().limit(std::forward<T>(t));
+  }
+
+  template <typename Database>
+  auto dynamic_limit(const Database&) -> decltype(statement_t<Database, no_limit_t>().dynamic_limit())
+  {
+    return statement_t<Database, no_limit_t>().dynamic_limit();
+  }
 }
 
 #endif

include/sqlpp11/offset.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2015, Roland Bock
+ * Copyright (c) 2013-2016, Roland Bock
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -328,6 +328,18 @@ namespace sqlpp
       return context;
     }
   };
+
+  template <typename T>
+  auto offset(T&& t) -> decltype(statement_t<void, no_offset_t>().offset(std::forward<T>(t)))
+  {
+    return statement_t<void, no_offset_t>().offset(std::forward<T>(t));
+  }
+
+  template <typename Database>
+  auto dynamic_offset(const Database&) -> decltype(statement_t<Database, no_offset_t>().dynamic_offset())
+  {
+    return statement_t<Database, no_offset_t>().dynamic_offset();
+  }
 }
 
 #endif

include/sqlpp11/order_by.h

@@ -268,6 +268,19 @@ namespace sqlpp
       return context;
     }
   };
+
+  template <typename... T>
+  auto order_by(T&&... t) -> decltype(statement_t<void, no_order_by_t>().order_by(std::forward<T>(t)...))
+  {
+    return statement_t<void, no_order_by_t>().order_by(std::forward<T>(t)...);
+  }
+
+  template <typename Database, typename... T>
+  auto dynamic_order_by(const Database&, T&&... t)
+      -> decltype(statement_t<Database, no_order_by_t>().dynamic_order_by(std::forward<T>(t)...))
+  {
+    return statement_t<Database, no_order_by_t>().dynamic_order_by(std::forward<T>(t)...);
+  }
 }
 
 #endif

include/sqlpp11/select_column_list.h

@@ -446,6 +446,13 @@ namespace sqlpp
   {
     return statement_t<void, no_select_column_list_t>().columns(std::forward<T>(t)...);
   }
+
+  template <typename Database, typename... T>
+  auto dynamic_select_columns(const Database&, T&&... t)
+      -> decltype(statement_t<void, no_select_column_list_t>().dynamic_columns(std::forward<T>(t)...))
+  {
+    return statement_t<Database, no_select_column_list_t>().dynamic_columns(std::forward<T>(t)...);
+  }
 }
 
 #endif

include/sqlpp11/select_flag_list.h

@@ -258,6 +258,19 @@ namespace sqlpp
       return context;
     }
   };
+
+  template <typename T>
+  auto select_flags(T&& t) -> decltype(statement_t<void, no_select_flag_list_t>().flags(std::forward<T>(t)))
+  {
+    return statement_t<void, no_select_flag_list_t>().flags(std::forward<T>(t));
+  }
+
+  template <typename Database, typename T>
+  auto dynamic_select_flags(const Database&, T&& t)
+      -> decltype(statement_t<Database, no_select_flag_list_t>().dynamic_flags(std::forward<T>(t)))
+  {
+    return statement_t<Database, no_select_flag_list_t>().dynamic_flags(std::forward<T>(t));
+  }
 }
 
 #endif

include/sqlpp11/union.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2015, Roland Bock
+ * Copyright (c) 2013-2016, Roland Bock
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification,
@@ -250,6 +250,18 @@ namespace sqlpp
       }
     };
   };
+
+  template <typename T>
+  auto union_all(T&& t) -> decltype(statement_t<void, no_union_t>().union_all(std::forward<T>(t)))
+  {
+    return statement_t<void, no_union_t>().union_all(std::forward<T>(t));
+  }
+
+  template <typename T>
+  auto union_distinct(T&& t) -> decltype(statement_t<void, no_union_t>().union_distinct(std::forward<T>(t)))
+  {
+    return statement_t<void, no_union_t>().union_distinct(std::forward<T>(t));
+  }
 }
 
 #endif