X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=db-aodbc%2Faodbc-sql.lisp;h=4cd8a6e28cc9bffe07607b3861a68e1d65538a41;hb=f68abc76e0e01f4633141a0c17a4d8f1976229b8;hp=24a6e47ea34b2fd3d403d0c60e5fd49c98696fb6;hpb=5691bb90517d7c565a141d131da76c3de1f8d566;p=clsql.git

diff --git a/db-aodbc/aodbc-sql.lisp b/db-aodbc/aodbc-sql.lisp
index 24a6e47..4cd8a6e 100644
--- a/db-aodbc/aodbc-sql.lisp
+++ b/db-aodbc/aodbc-sql.lisp
@@ -144,6 +144,90 @@
 	      (setf (car rest) elem))
 	list))))
 
+;;; Sequence functions
+
+(defun %sequence-name-to-table (sequence-name)
+  (concatenate 'string "_clsql_seq_" (sql-escape sequence-name)))
+
+(defun %table-name-to-sequence-name (table-name)
+  (and (>= (length table-name) 11)
+       (string= (subseq table-name 0 11) "_clsql_seq_")
+       (subseq table-name 11)))
+
+(defmethod database-create-sequence (sequence-name
+				     (database aodbc-database))
+  (let ((table-name (%sequence-name-to-table sequence-name)))
+    (database-execute-command
+     (concatenate 'string "CREATE TABLE " table-name
+		  " (last_value int NOT NULL PRIMARY KEY, increment_by int, min_value int, is_called char(1))")
+     database)
+    (database-execute-command 
+     (concatenate 'string "INSERT INTO " table-name
+		  " VALUES (1,1,1,'f')")
+     database)))
+
+(defmethod database-drop-sequence (sequence-name
+				   (database aodbc-database))
+  (database-execute-command
+   (concatenate 'string "DROP TABLE " (%sequence-name-to-table sequence-name)) 
+   database))
+
+(defmethod database-list-sequences ((database aodbc-database)
+                                    &key (owner nil))
+  (declare (ignore owner))
+  (mapcar #'(lambda (s) (%table-name-to-sequence-name (car s)))
+          (database-query "SHOW TABLES LIKE '%clsql_seq%'" 
+                          database nil)))
+
+(defmethod database-set-sequence-position (sequence-name
+                                           (position integer)
+                                           (database aodbc-database))
+  (database-execute-command
+   (format nil "UPDATE ~A SET last-value=~A" 
+	   (%sequence-name-to-table sequence-name)
+           position)
+   database)
+  position)
+
+(defmethod database-sequence-next (sequence-name (database aodbc-database))
+  (without-interrupts
+   (let* ((table-name (%sequence-name-to-table sequence-name))
+	  (tuple
+	   (car (database-query 
+		 (concatenate 'string "SELECT last_value,is_called FROM " 
+			      table-name)
+		 database
+		 :auto))))
+     (cond
+       ((char-equal (schar (second tuple) 0) #\f)
+	(database-execute-command
+	 (format nil "UPDATE ~A SET is_called='t'" table-name)
+	 database)
+	(car tuple))
+       (t
+	(let ((new-pos (1+ (car tuple))))
+	 (database-execute-command
+	  (format nil "UPDATE ~A SET last_value=~D" table-name new-pos)
+	  database)
+	 new-pos))))))
+	     
+(defmethod database-sequence-last (sequence-name (database aodbc-database))
+  (without-interrupts
+   (caar (database-query 
+	  (concatenate 'string "SELECT last_value FROM " 
+		       (%sequence-name-to-table sequence-name))
+	  database
+	  :auto))))
+
+(defmethod database-create (connection-spec (type (eql :aodbc)))
+  (warn "Not implemented."))
+
+(defmethod database-destroy (connection-spec (type (eql :aodbc)))
+  (warn "Not implemented."))
+
+(defmethod database-probe (connection-spec (type (eql :aodbc)))
+  (warn "Not implemented."))
+
 #+ignore		       
 (when (clsql-base-sys:database-type-library-loaded :aodbc)
   (clsql-base-sys:initialize-database-type :database-type :aodbc))