- ((expression :accessor expression :initarg :expression :initform nil)
- (parameters :accessor parameters :initarg :parameters :initform nil)
+ ((expression :accessor expression :initarg :expression :initform nil
+ :documentation "query that refers to parameters using \"$1\", \"$2\", \"$n\".
+ These match positions in the parameters list.")
+ (parameters :accessor parameters :initarg :parameters :initform nil
+ :documentation "list of parameters")