As I know, there are 4 bigtables used for store indexes. So when I try to fetch a single property or a tuple of (single property, key), datastore can only scan the index table, no need to fetch the corresponding entities. That would also be useful when I fetch several properties via composite index or even merge-join.
Is my thought right? ---------- keakon My blog(Chinese): www.keakon.net Blog source code: https://bitbucket.org/keakon/doodle/ -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
