implemented lazy loading for object_ptr and belongs_to

include/matador/sql/query_context.hpp

@@ -2,31 +2,29 @@
 #define QUERY_QUERY_DATA_HPP
 
 #include "matador/object/attribute.hpp"
+#include "matador/object/object_resolver_factory.hpp"
 
 #include "matador/utils/types.hpp"
 
-#include <unordered_map>
-
 namespace matador::sql {
-
 enum class sql_command {
-    SQL_UNKNOWN,
-    SQL_CREATE,
-    SQL_CREATE_TABLE,
-    SQL_CREATE_SCHEMA,
-    SQL_CREATE_DATABASE,
-    SQL_UPDATE,
-    SQL_INSERT,
-    SQL_DELETE,
-    SQL_SELECT,
-    SQL_DROP,
-    SQL_DROP_TABLE,
-    SQL_DROP_SCHEMA,
-    SQL_DROP_DATABASE,
-    SQL_ALTER,
-    SQL_ALTER_TABLE,
-    SQL_ALTER_SCHEMA
-  };
+  SQL_UNKNOWN,
+  SQL_CREATE,
+  SQL_CREATE_TABLE,
+  SQL_CREATE_SCHEMA,
+  SQL_CREATE_DATABASE,
+  SQL_UPDATE,
+  SQL_INSERT,
+  SQL_DELETE,
+  SQL_SELECT,
+  SQL_DROP,
+  SQL_DROP_TABLE,
+  SQL_DROP_SCHEMA,
+  SQL_DROP_DATABASE,
+  SQL_ALTER,
+  SQL_ALTER_TABLE,
+  SQL_ALTER_SCHEMA
+};
 
 struct sql_command_info {
   std::string sql;
@@ -40,14 +38,10 @@ struct query_context {
   std::string schema_name{};
   std::string table_name{};
   std::vector<object::attribute> prototype{};
-  // std::vector<std::string> result_vars{};
   std::vector<std::string> bind_vars{};
   std::vector<utils::database_type> bind_types{};
-
-  // std::unordered_map<std::string, std::string> column_aliases{};
-  // std::unordered_map<std::string, std::string> table_aliases{};
+  std::shared_ptr<object::object_resolver_factory> resolver_factory{};
 };
-
 }
 
 #endif //QUERY_QUERY_DATA_HPP