Hi, I'm using the Java low-level Datastore API, in a local unit test (as described here: http://code.google.com/appengine/docs/java/howto/unittesting.htm):
I'm trying to run a prefix search on __key__ (which I generated in the first place), as per the usual range-query hack: q.addFilter(Entity.KEY_RESERVED_PROPERTY, Query.FilterOperator.GREATER_THAN_OR_EQUAL, prefix); q.addFilter(Entity.KEY_RESERVED_PROPERTY, Query.FilterOperator.LESS_THAN, prefix + '\ufffd'); This fails to return any results. Note, that this technique works for all other properties, just not __key__. It's my impression that __key__ does not have a descending index by default. So, I've tried adding this to datastore-index.xml: <datastore-index kind="Catalog" ancestor="false"> <property name="__key__" direction="desc" /> </datastore-index> But this had no impact. In fact, based on a quick trace, I've seen no evidence that the GAE code invoked during the unit test even tries to open this file. I believe this might be a bug in the AppEngine implementation (shouldn't an exception be thrown if there's no index on the queried field)? Or at least something that was overlooked... Is there a workaround? Thanks, Viktor -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.