(state :initform :closed :reader database-state)
(command-recording-stream :accessor command-recording-stream :initform nil)
(result-recording-stream :accessor result-recording-stream :initform nil)
(state :initform :closed :reader database-state)
(command-recording-stream :accessor command-recording-stream :initform nil)
(result-recording-stream :accessor result-recording-stream :initform nil)