diff -r cb27485ef5ae -r 4cc020ee70e2 rqlrewrite.py
--- a/rqlrewrite.py	Wed Mar 24 17:58:05 2010 +0100
+++ b/rqlrewrite.py	Wed Mar 24 18:04:59 2010 +0100
@@ -41,15 +41,15 @@
         except KeyError:
             continue
         stinfo = var.stinfo
-        if stinfo.get('uidrels'):
+        if stinfo.get('uidrel') is not None:
             continue # eid specified, no need for additional type specification
         try:
-            typerels = rqlst.defined_vars[varname].stinfo.get('typerels')
+            typerel = rqlst.defined_vars[varname].stinfo.get('typerel')
         except KeyError:
             assert varname in rqlst.aliases
             continue
-        if newroot is rqlst and typerels:
-            mytyperel = iter(typerels).next()
+        if newroot is rqlst and typerel is not None:
+            mytyperel = typerel
         else:
             for vref in newroot.defined_vars[varname].references():
                 rel = vref.relation()
@@ -80,7 +80,7 @@
                 # tree is not annotated yet, no scope set so add the restriction
                 # to the root
                 rel = newroot.add_type_restriction(var, possibletypes)
-            stinfo['typerels'] = frozenset((rel,))
+            stinfo['typerel'] = rel
             stinfo['possibletypes'] = possibletypes