diff --git a/modules/plugin_dbui/dbsvc.py b/modules/plugin_dbui/dbsvc.py
index cde6354d7d16de96aad7d4b753471ef44d982d9d..3018f58ec2bae6c411abafc49b003c7ed4973413 100644
--- a/modules/plugin_dbui/dbsvc.py
+++ b/modules/plugin_dbui/dbsvc.py
@@ -114,6 +114,10 @@ class DbSvc(BaseSvc):
 
         """ 
         query = ""
+        
+        if not li:
+            return query
+        
         for el in li:
             
             # transform bracket as db.table1.field1
diff --git a/static/plugin_dbui/CHANGELOG b/static/plugin_dbui/CHANGELOG
index cc17b3657e41038973ad245b0f446e60aa23e473..742a34ce44180fa8ed61115d4803fee1f22961e4 100644
--- a/static/plugin_dbui/CHANGELOG
+++ b/static/plugin_dbui/CHANGELOG
@@ -1,7 +1,9 @@
 --------------------------------- CHANGE LOG ----------------------------------
 
 HEAD
+  - Bug fixed
   - Improve PanelWithUrlSelector class (selectorTitle, selectorRegion)
+  - The plugin pGridExport is replaced by pGridExpertMemu.
   
 0.4.9.7 (Nov 2012)
   - Major release with several improvements.