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java Programming Glossary: em.createqueryHow to query an M:N relationship with JPA2? http://stackoverflow.com/questions/11297241/how-to-query-an-mn-relationship-with-jpa2 cq.distinct true cq.where predicate TypedQuery BlogPost tq em.createQuery cq return tq.getResultList This solution makes use of the canonical..
JPA & Criteria API - Select only specific columns http://stackoverflow.com/questions/12618489/jpa-criteria-api-select-only-specific-columns using metamodel List Tuple tupleResult em.createQuery cq .getResultList for Tuple t tupleResult Long id Long t.get.. EntityClazz_.VERSION using metamodel List T result em.createQuery cq .getResultList See this link for further reference. share..
Hibernate Criteria API - adding a criterion: string should be in collection http://stackoverflow.com/questions/2735071/hibernate-criteria-api-adding-a-criterion-string-should-be-in-collection Foobar foobar cq.from Foobar.class TypedQuery Foobar q em.createQuery cq.select foobar .where b.isMember abc123 foobar. List String..
Infinite Recursion with Jackson JSON and Hibernate JPA issue http://stackoverflow.com/questions/3325387/infinite-recursion-with-jackson-json-and-hibernate-jpa-issue readOnly true public Collection getAll return Collection em.createQuery SELECT t FROM Trainee t .getResultList persistence.xml persistence..
Is there a portable way to have “SELECT FIRST 10 * FROM T” semantic? http://stackoverflow.com/questions/3400589/is-there-a-portable-way-to-have-select-first-10-from-t-semantic Query#setFirstResult and Query#setMaxResults . List users em.createQuery SELECT u FROM User u ORDER BY u.id .setFirstResult 0 Index of..
select from two tables using JPQL http://stackoverflow.com/questions/3567438/select-from-two-tables-using-jpql can get data using the statement List persons null persons em.createQuery select p.albumName from PhotoAlbum p Roleuser r where r p.userId.. roleuser's row named firstname I'm using the query persons em.createQuery select r.firstName p.albumName from PhotoAlbum p Roleuser r..
Complex queries with JPA criteria builder http://stackoverflow.com/questions/3842122/complex-queries-with-jpa-criteria-builder .where p .orderBy cb.asc r.get id List Tuple result em.createQuery cq .getResultList Or with metamodel typesafe but a bit wordy..
@PersistenceUnit annotation won't create an EntityManageFactory emf=null http://stackoverflow.com/questions/4381724/persistenceunit-annotation-wont-create-an-entitymanagefactory-emf-null System.out.println Entity manager emf Query query em.createQuery SELECT t FROM Tag t ORDER BY t.refCount DESC t.tag List Tag..
JPA2: Case-insensitive like matching anywhere http://stackoverflow.com/questions/4580285/jpa2-case-insensitive-like-matching-anywhere lastname builder.asc root.get firstname Execute return em.createQuery query . setMaxResults PAGE_SIZE 1 . setFirstResult page 1 PAGE_SIZE..
PersistenceContext EntityManager injection NullPointerException http://stackoverflow.com/questions/4708035/persistencecontext-entitymanager-injection-nullpointerexception get @Produces application json public List get return em.createQuery from TestEntity .getResultList When the get method is invoked..
IN-clause in HQL or Java Persistence Query Language http://stackoverflow.com/questions/4828049/in-clause-in-hql-or-java-persistence-query-language work fine String jpql from A where name in names Query q em.createQuery jpql q.setParameter names l For Hibernate's you'll need to use..
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