It is not supported in Google App Engine JPA/JDO http://code.google.com/intl/pl/appengine/docs/java/datastore/usingjdo.html#Unsupported_Features_of_JDO
---------------- "Join" queries. You cannot use a field of a child entity in a filter when performing a query on the parent kind. Note that you can test the parent's relationship field directly in query using a key. --------------- The only way is to "denormalization". Simple duplicate fields in Employ and ContactInfo you want to query on. -- 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 [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-java?hl=.
