situation:
- user entities in db (properties id, name, sex, age)
- you want to get the oldest of them with min. age 10

createQuery(select u from User u where u.age>=10 order by age desc)
query.setMaxResults(1)  !!!
query.getResultList();

how GAE handles this situation?

1. search in index table where age>=10 and only the oldest
2. found 1 entity key
3. read entity
4. return entity

OR

1. find all of them in index table where age>=10
2. found X entity keys
3. read all entities
4. return only the oldest of them (because JPA maxResults=1)

Thanks

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