added blob interface to backend binder classes

backends/mysql/include/mysql_parameter_binder.hpp

@@ -54,6 +54,8 @@ public:
   void bind(size_t pos, const std::string &string) override;
   void bind(size_t pos, const std::string &x, size_t size) override;
 
+  void bind(size_t pos, const utils::blob &blob) override;
+
   [[nodiscard]] std::vector<MYSQL_BIND>& bind_params();
 
 private:

backends/mysql/src/mysql_parameter_binder.cpp

@@ -179,6 +179,11 @@ void mysql_parameter_binder::bind(size_t pos, const std::string &str, size_t siz
   detail::bind_value(MYSQL_TYPE_VAR_STRING, str.data(), size, bind_params_[pos], is_null_vector[pos].is_null);
 }
 
+void mysql_parameter_binder::bind(size_t pos, const utils::blob &blob)
+{
+
+}
+
 std::vector<MYSQL_BIND> &mysql_parameter_binder::bind_params()
 {
   return bind_params_;