The FQL query below results in a NoIndexFunctionException because 'current_location' is not indexable.
https://graph.facebook.com/fql?q=SELECT%20uid,%20name,%20current_location%20FROM%20user%20WHERE%20uid=me()%20OR%20uid%20AND%20current_location%20IN%20(SELECT%20uid2%20FROM%20friend%20WHERE%20uid1=me())&access_token=CCAAC...
Are there any alternatives for filtering non indexable fields?