text: ALTER TABLE `my_config_activity`
      MODIFY `Package` varchar(32) CHARACTER SET utf8mb4 NOT NULL,
      DEFAULT CHARACTER SET utf8mb4;
  
  ALTER TABLE `my_config_group`
      MODIFY `Name` varchar(128) CHARACTER SET utf8mb4 NOT NULL,
      DEFAULT CHARACTER SET utf8mb4;
  
  ALTER TABLE `my_config_tree`
      MODIFY `Summary` varchar(255) CHARACTER SET utf8mb4 NOT NULL DEFAULT '',
      MODIFY `Description` varchar(8192) CHARACTER SET utf8mb4 NOT NULL DEFAULT '',
      DEFAULT CHARACTER SET utf8mb4;
  
  ALTER TABLE `my_config_tree_log`
      MODIFY `Comment` varchar(512) CHARACTER SET utf8mb4 DEFAULT NULL,
      DEFAULT CHARACTER SET utf8mb4;
  
  ALTER TABLE `my_config_user_group`
      DEFAULT CHARACTER SET utf8mb4;
  
  ALTER TABLE `my_config_tree_group`
      DEFAULT CHARACTER SET utf8mb4;
  
  ALTER DATABASE `onlineconf`
      DEFAULT CHARACTER SET utf8mb4;
  