--- ZSQLExtend/ZSQLExtend.py	2006/10/05 09:37:38	1.95
+++ ZSQLExtend/ZSQLExtend.py	2006/11/07 11:15:04	1.96
@@ -946,7 +946,10 @@ class ZSQLExtendFolder(Folder,Persistent
             #elif (not (name[0]=="-" or name[0]=="_")) and (not len(value)==0):
             elif (not (name[0]=="-" or name[0]=="_")):
 
-                changeList.append("\""+name+"\"="+sql_quote(urllib.unquote(value)))
+		if value=="":
+	                changeList.append("\""+name+"\"=null")
+		else:
+                	changeList.append("\""+name+"\"="+sql_quote(urllib.unquote(value)))
                 
         changeString=string.join(changeList,",")