"JPA hibernates left join" Code Answer's
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JPA hibernates left join
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<Tuple> cq = cb.createTupleQuery();
Root<Author> root = cq.from(Author.class);
Join<Object, Object> book = root.join(Author_.BOOKS, JoinType.LEFT);
cq.multiselect(root, book);
ParameterExpression<String> pLastName = cb.parameter(String.class);
cq.where(cb.equal(root.get(Author_.LAST_NAME), pLastName));
TypedQuery<Tuple> q = em.createQuery(cq);
q.setParameter(pLastName, "Janssen");
List<Tuple> authorBooks = q.getResultList();
Source: thorben-janssen.com
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