Question

Let’s say I’m in a loop creating JPA queries:

for(A elem : collection) {
  emanager.createQuery("update A a set a.x=:y where a.id=:id")
          .setParameter("id",elem.id)
          .setParameter(":y", 123)
          .executeUpdate();
}

Can I reuse the returned Query instance?

Query query = emanager.createQuery("update A a set a.x=:y where a.id=:id");
for(A elem : collection) {
  query
          .setParameter("id",elem.id)
          .setParameter(":y", 123)
          .executeUpdate();
}

Does it apply for all instances of Query? NamedQuery, NativeQuery, etc
Of course, I’m talking about reusing an instance within the same EntityManager, ie, within the same transaction

Answer 1

It is reusable for Query. As far as I’ve tried working.