hi,
  I use jpa as my persistence method.But I find I couldn't use
parameter query.

query = entityManager.createQuery("select a from A a where a.email=?
1");
query.setParameter(1,"[email protected]");
list = query.getResultList();


list is empty;

but If I use
query = entityManager.createQuery("select a from A a where
a.email='[email protected]'");
list = query.getResultList();

list isn't empty;


How to use parameter query?

Thanks.

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