+(defun has-table (name database)
+ (let ((name-retrieved
+ (caar (database-query
+ (format nil "SELECT relname FROM pg_class WHERE relname='~A'"
+ name)
+ database nil nil))))
+ (if (and (stringp name-retrieved) (plusp (length name-retrieved)))
+ t
+ nil)))
+
+(defmethod slot-unbound (class (obj generic-postgresql-database)
+ (slot (eql 'has-table-pg_roles)))
+ ;; Lazily cache slot value
+ (declare (ignore class))
+ (setf (slot-value obj 'has-table-pg_roles) (has-table "pg_roles" obj)))
+