Hi 周雁鸣,
CriteriaQuery<User> cq = ...
TypedQuery<User> tq = em.createQuery(cq);
tq.setFirstResult(0);
tq.setMaxResults(10);
List<User> users = tq.getResultList();
long count = users.size();
This will, normally, generate TWO SQL queries - a SELECT {columns} ... and a
SELECT COUNT(id).
Ok?
-----Original Message-----
From: 周雁鸣 [mailto:[email protected]]
Sent: Monday, November 23, 2009 3:12 AM
To: [email protected]
Subject: How to count on a query then reuse this query fetch data?
CriteriaQuery<User> cq = ...
TypedQuery<User> tq = em.createQuery(cq);
long count = count(tq); //howto?
tq.setFirstResult(0);
tq.setMaxResults(10);
List<User> users = tq.getResultList();
how to implement count function and I can reuse query object to find entities.
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