;;;; Original code by Pierre R. Mai
;;;; Date Started: Feb 2002
;;;;
-;;;; $Id: postgresql-sql.cl,v 1.12 2002/03/29 09:37:24 kevin Exp $
+;;;; $Id: postgresql-sql.cl,v 1.16 2002/05/10 08:05:48 marc.battyani Exp $
;;;;
;;;; This file, part of CLSQL, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;; and Copyright (c) 1999-2001 by Pierre R. Mai
((conn-ptr :accessor database-conn-ptr :initarg :conn-ptr
:type pgsql-conn-def)))
+(defmethod database-type ((database postgresql-database))
+ :postgresql)
+
(defmethod database-name-from-spec (connection-spec (database-type
(eql :postgresql)))
(check-connection-spec connection-spec database-type
(make-instance 'postgresql-database
:name (database-name-from-spec connection-spec
database-type)
+ :connection-spec connection-spec
:conn-ptr connection)))))
finally
(incf (postgresql-result-set-tuple-index result-set))
(return list)))))
+
+;;; Large objects support (Marc B)
+
+(defmethod database-create-large-object ((database postgresql-database))
+ (lo-create (database-conn-ptr database)
+ (logior postgresql::+INV_WRITE+ postgresql::+INV_READ+)))
+
+(defmethod database-write-large-object (object-id (data string) (database postgresql-database))
+ (let ((ptr (database-conn-ptr database))
+ (length (length data))
+ (result nil)
+ (fd nil))
+ (with-transaction (:database database)
+ (unwind-protect
+ (progn
+ (setf fd (lo-open ptr object-id postgresql::+INV_WRITE+))
+ (when (>= fd 0)
+ (when (= (lo-write ptr fd data length) length)
+ (setf result t))))
+ (progn
+ (when (and fd (>= fd 0))
+ (lo-close ptr fd))
+ )))
+ result))
+
+;; (MB) the begin/commit/rollback stuff will be removed when with-transaction wil be implemented
+(defmethod database-read-large-object (object-id (database postgresql-database))
+ (let ((ptr (database-conn-ptr database))
+ (buffer nil)
+ (result nil)
+ (length 0)
+ (fd nil))
+ (unwind-protect
+ (progn
+ (database-execute-command "begin" database)
+ (setf fd (lo-open ptr object-id postgresql::+INV_READ+))
+ (when (>= fd 0)
+ (setf length (lo-lseek ptr fd 0 2))
+ (lo-lseek ptr fd 0 0)
+ (when (> length 0)
+ (setf buffer (uffi:allocate-foreign-string
+ length :unsigned t))
+ (when (= (lo-read ptr fd buffer length) length)
+ (setf result (uffi:convert-from-foreign-string
+ buffer :length length :null-terminated-p nil))))))
+ (progn
+ (when buffer (uffi:free-foreign-object buffer))
+ (when (and fd (>= fd 0)) (lo-close ptr fd))
+ (database-execute-command (if result "commit" "rollback") database)))
+ result))
+
+(defmethod database-delete-large-object (object-id (database postgresql-database))
+ (lo-unlink (database-conn-ptr database) object-id))