diff -r 5def1d98fce7 -r 3b755c9057fd schema.py
--- a/schema.py	Fri Aug 29 07:44:13 2014 +0200
+++ b/schema.py	Mon Jun 16 10:07:57 2014 +0200
@@ -154,6 +154,7 @@
     # to be defined in concrete classes
     rqlst = None
     predefined_variables = None
+    full_rql = None
 
     def __init__(self, expression, mainvars, eid):
         """