--- a/server/querier.py	Thu Jun 27 08:52:15 2013 +0200
+++ b/server/querier.py	Wed Jan 22 15:49:32 2014 +0100
@@ -151,7 +151,7 @@
         # session executing the query
         self.session = session
         # quick reference to the system source
-        self.syssource = session.cnxset.source('system')
+        self.syssource = session.repo.system_source
         # execution steps
         self.steps = []
         # index of temporary tables created during execution