ER NOT NULL,
  cost_name   VARCHAR(64) NOT NULL,
  cost_value  FLOAT DEFAULT NULL,
  last_update TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  comment     VARCHAR(1024) DEFAULT NULL,
  PRIMARY KEY (cost_name, engine_name, device_type)
) ENGINE=InnoDB CHARACTER SET=utf8 COLLATE=utf8_general_ci STATS_PERSISTENT=0;