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Query over the keySet of a map field with collection parameter

It is possible to execute a query over a keySet of a map field with comparing to a collection parameter? Set values = new HashSet (); values.add("c2"); String query = // "SELECT e " + "FROM " + EntityParent.class.getName() + " e " + "WHERE e.map member of ?1"; TypedQuery q = em.createQuery(query

Performance in SELECT statement

:state"; TypedQuery query = em.createQuery(strSelect, TestEntity.class); query.setParameter("state

Is there any faster select method?

SELECT: TypedQuery query = em.createQuery(     "SELECT p FROM Point p WHERE p.id = " + element.getId(), Point.class); List points = query.getResultList(); WRITE: em.persist(p); ** the Point class is of the tutorial. I found the above select method is ten times slower

java.sql.Date equals comparison not working with CriteriaAPI

;  TypedQuery query = em.createQuery(q);         List

Internal exception when updating date filed (TemporalType.DATE)

;         TypedQuery personQuery = entityManager.createQuery

Subquery error

My query: TypedQuery query = em.createQuery("SELECT p FROM Station p WHERE rid = (SELECT p FROM Station p where tpl='York') AND tpl != 'York'", Station.class);   Error: Exception in thread "main" [ObjectDB 2.6.6_04] SELECT p FROM Station p WHERE rid = ( == SELECT