+ (when (find (second connection-spec) (database-list connection-spec type)
+ :key #'car :test #'string-equal)
+ t))
+
+(defmethod database-list (connection-spec (type (eql :mysql)))
+ (destructuring-bind (host name user password) connection-spec
+ (declare (ignore name))
+ (let ((database (database-connect (list host "mysql" user password) type)))
+ (unwind-protect
+ (progn
+ (setf (slot-value database 'clsql-sys::state) :open)
+ (mapcar #'car (database-query "show databases" database :auto nil)))
+ (progn
+ (database-disconnect database)
+ (setf (slot-value database 'clsql-sys::state) :closed))))))
+
+;;; Database capabilities
+
+(defmethod db-type-use-column-on-drop-index? ((db-type (eql :mysql)))
+ t)
+
+(defmethod db-type-has-views? ((db-type (eql :mysql)))
+ ;; MySQL 4.1 will apparently have views, need to check *mysql-client-info*
+ nil)
+
+(defmethod db-type-has-subqueries? ((db-type (eql :mysql)))
+ ;; MySQL 4.1 will apparently have subqueries, need to check *mysql-client-info*
+ nil)
+
+(defmethod db-type-has-boolean-where? ((db-type (eql :mysql)))
+ nil)
+
+(defmethod db-type-has-union? ((db-type (eql :mysql)))
+ (not (eql (schar mysql::*mysql-client-info* 0) #\3)))
+
+(defmethod db-type-transaction-capable? ((db-type (eql :mysql)) database)
+ (let ((tuple (car (database-query "SHOW VARIABLES LIKE 'HAVE_INNODB'" database :auto nil))))
+ (and tuple (string-equal "YES" (second tuple)))))
+
+(when (clsql-sys:database-type-library-loaded :mysql)
+ (clsql-sys:initialize-database-type :database-type :mysql))