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JPA hibernates left join

Wide-eyed Walrus answered on June 3, 2021 Popularity 6/10 Helpfulness 1/10

answer JPA hibernates left join

JPA hibernates left join

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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();

Popularity 6/10 Helpfulness 1/10 Language whatever

Source: thorben-janssen.com

Tags: jpa left-join whatever

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