r1791: * interfaces/postgresql/postgresql-sql.cl:

[clsql.git] / interfaces / postgresql / postgresql-sql.cl

diff --git a/interfaces/postgresql/postgresql-sql.cl b/interfaces/postgresql/postgresql-sql.cl
index 2f3399243f80acb0263a28a2d77f489c328eed5c..4104afa13048ba37f1c421c2a0c36ddfb9f418dd 100644 (file)
--- a/interfaces/postgresql/postgresql-sql.cl
+++ b/interfaces/postgresql/postgresql-sql.cl
@@ -8,7 +8,7 @@
 ;;;;                Original code by Pierre R. Mai 
 ;;;; Date Started:  Feb 2002
 ;;;;
-;;;; $Id: postgresql-sql.cl,v 1.10 2002/03/27 08:09:25 kevin Exp $
+;;;; $Id: postgresql-sql.cl,v 1.14 2002/04/23 18:28:02 kevin Exp $
 ;;;;
 ;;;; This file, part of CLSQL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;; and Copyright (c) 1999-2001 by Pierre R. Mai
@@ -30,33 +30,38 @@
 
 ;;; Field conversion functions
 
-(defun canonicalize-types (types num-fields res-ptr)
-  (cond
-   ((listp types)
-    (canonicalize-type-list types num-fields))
-   ((eq types :auto)
-    (let ((new-types '()))
-      (dotimes (i num-fields)
-       (declare (fixnum i))
-       (let* ((type (PQftype res-ptr i)))
-         (push
-          (case type
-            ((#.pgsql-ftype#bytea
-              #.pgsql-ftype#int2
-              #.pgsql-ftype#int4)
-             :int)
-            (#.pgsql-ftype#int8
-             :longlong)
-            ((#.pgsql-ftype#float4
-              #.pgsql-ftype#float8)
-             :double)
-            (otherwise
-             t))
-          new-types)))
+(defun make-type-list-for-auto (num-fields res-ptr)
+  (let ((new-types '()))
+    (dotimes (i num-fields)
+      (declare (fixnum i))
+      (let* ((type (PQftype res-ptr i)))
+       (push
+        (case type
+          ((#.pgsql-ftype#bytea
+            #.pgsql-ftype#int2
+            #.pgsql-ftype#int4)
+           :int32)
+          (#.pgsql-ftype#int8
+           :int64)
+          ((#.pgsql-ftype#float4
+            #.pgsql-ftype#float8)
+           :double)
+          (otherwise
+           t))
+        new-types)))
       (nreverse new-types)))
-   (t
-    nil)))
 
+(defun canonicalize-types (types num-fields res-ptr)
+  (if (null types)
+      nil
+      (let ((auto-list (make-type-list-for-auto num-fields res-ptr)))
+       (cond
+         ((listp types)
+          (canonicalize-type-list types auto-list))
+         ((eq types :auto)
+          auto-list)
+         (t
+          nil)))))
 
 (defun tidy-error-message (message)
   (unless (stringp message)
@@ -269,3 +274,57 @@
           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+)))
+
+;; (MB)the begin/commit/rollback stuff will be removed when with-transaction wil be implemented
+(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))
+    (unwind-protect
+       (progn 
+        (database-execute-command "begin" database)
+        (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))
+       (database-execute-command (if result "commit" "rollback") database)))
+    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))