added schema creation to session class

include/matador/sql/query_intermediates.hpp

@@ -200,7 +200,8 @@ class query_create_intermediate : public query_start_intermediate
 public:
   explicit query_create_intermediate(connection &db);
 
-  query_execute_finish table(const std::string &table, std::initializer_list<column> columns);
+  query_execute_finish table(const std::string &table_name, std::initializer_list<column> columns);
+  query_execute_finish table(const std::string &table_name, const std::vector<column> &columns);
   template<class Type>
   query_execute_finish table(const std::string &table_name)
   {

include/matador/sql/session.hpp

@@ -21,6 +21,8 @@ public:
   template<typename Type>
   void attach(const std::string &table_name);
 
+  void create_schema();
+
   template<typename Type>
   entity<Type> insert(Type *obj);
 

include/matador/sql/table_repository.hpp

@@ -11,15 +11,23 @@
 
 namespace matador::sql {
 
+class connection;
+
 struct table_info
 {
   std::string name;
   record prototype;
+  void create(connection &conn) const;
+  void drop(connection &conn) const;
 };
 
 class table_repository
 {
 public:
+  using repository = std::unordered_map<std::type_index, table_info>;
+  using iterator = repository::iterator;
+  using const_iterator = repository::const_iterator;
+
   template<typename Type>
   const table_info& attach(const std::string &table_name)
   {
@@ -52,8 +60,14 @@ public:
 
   [[nodiscard]] bool exists(const std::type_index &ti) const;
 
+  iterator begin();
+  const_iterator begin() const;
+  iterator end();
+  const_iterator end() const;
+
+  bool empty() const;
+
 private:
-  using repository = std::unordered_map<std::type_index, table_info>;
   repository repository_;
 };