(defclass postgresql-database (database)
((conn-ptr :accessor database-conn-ptr :initarg :conn-ptr
- :type pgsql-conn-def)))
+ :type pgsql-conn-def)
+ (lock
+ :accessor database-lock
+ :initform (make-process-lock "conn"))))
(defmethod database-type ((database postgresql-database))
:postgresql)
(make-instance 'postgresql-database
:name (database-name-from-spec connection-spec
database-type)
+ :database-type :postgresql
:connection-spec connection-spec
:conn-ptr connection)))))
(defmethod database-probe (connection-spec (type (eql :postgresql)))
+ (when (find (second connection-spec) (database-list connection-spec type)
+ :key #'car :test #'string-equal)
+ t))
+
+(defmethod database-list (connection-spec (type (eql :postgresql)))
(destructuring-bind (host name user password) connection-spec
+ (declare (ignore name))
(let ((database (database-connect (list host "template1" user password)
type)))
(unwind-protect
- (when
- (find name (database-query "select datname from pg_database"
- database :auto)
- :key #'car :test #'string-equal)
- t)
- (database-disconnect database)))))
-
+ (progn
+ (setf (slot-value database 'clsql-base-sys::state) :open)
+ (mapcar #'car (database-query "select datname from pg_database"
+ database :auto)))
+ (progn
+ (database-disconnect database)
+ (setf (slot-value database 'clsql-base-sys::state) :closed))))))
+
+(defmethod database-describe-table ((database postgresql-database) table)
+ (database-query
+ (format nil "select a.attname, t.typname
+ from pg_class c, pg_attribute a, pg_type t
+ where c.relname = '~a'
+ and a.attnum > 0
+ and a.attrelid = c.oid
+ and a.atttypid = t.oid"
+ (sql-escape (string-downcase table)))
+ database :auto))
+
+(defun %pg-database-connection (connection-spec)
+ (check-connection-spec connection-spec :postgresql
+ (host db user password &optional port options tty))
+ (macrolet ((coerce-string (var)
+ `(unless (typep ,var 'simple-base-string)
+ (setf ,var (coerce ,var 'simple-base-string)))))
+ (destructuring-bind (host db user password &optional port options tty)
+ connection-spec
+ (coerce-string db)
+ (coerce-string user)
+ (let ((connection (pqsetdblogin host port options tty db user password)))
+ (declare (type postgresql::pgsql-conn-ptr connection))
+ (unless (eq (pqstatus connection) :connection-ok)
+ ;; Connect failed
+ (error 'clsql-connect-error
+ :database-type :postgresql
+ :connection-spec connection-spec
+ :errno (pqstatus connection)
+ :error (pqerrormessage connection)))
+ connection))))
+
+(defmethod database-reconnect ((database postgresql-database))
+ (let ((lock (database-lock database)))
+ (with-process-lock (lock "Reconnecting")
+ (with-slots (connection-spec conn-ptr)
+ database
+ (setf conn-ptr (%pg-database-connection connection-spec))
+ database))))
(when (clsql-base-sys:database-type-library-loaded :postgresql)
(clsql-base-sys:initialize-database-type :database-type :postgresql))