다음은 쿼리에 관한 기준입니다 NOT IN()
(그러나 나는 선호합니다 NOT EXISTS()
~ 위에 NOT IN()
).
CriteriaBuilder criteriaBuilder=entityManager.getCriteriaBuilder();
CriteriaQuery<Colour>criteriaQuery=criteriaBuilder.createQuery(Colour.class);
Metamodel metamodel = entityManager.getMetamodel();
EntityType<Colour> entityType = metamodel.entity(Colour.class);
Root<Colour> root = criteriaQuery.from(entityType);
criteriaQuery.select(root);
Subquery<Long>subquery=criteriaQuery.subquery(Long.class);
Root<Product> subRoot = subquery.from(Product.class);
subquery.select(root.get(Colour_.colourId));
Predicate paramPredicate = criteriaBuilder.equal(subRoot.get(Product_.prodId), prodId);
Predicate correlatePredicate = criteriaBuilder.equal(root.get(Colour_.productSet), subRoot);
subquery.where(criteriaBuilder.and(paramPredicate, correlatePredicate));
criteriaQuery.where(criteriaBuilder.in(root.get(Colour_.colourId)).value(subquery).not());
criteriaQuery.orderBy(criteriaBuilder.desc(root.get(Colour_.colourId)));
TypedQuery<Colour> typedQuery = entityManager.createQuery(criteriaQuery);
List<Colour> list=typedQuery.getResultList();
이것은 다음 SQL 쿼리를 생성합니다.
SELECT t0.colour_id, t0.colour_hex, t0.colour_name
FROM projectdb.colour t0
WHERE NOT
(t0.colour_id IN (
SELECT t0.colour_id
FROM prod_colour t3, projectdb.product t2, projectdb.product t1
WHERE (((t1.prod_id = ?)
AND (t1.prod_id = t2.prod_id))
AND ((t3.colour_id = t0.colour_id)
AND (t2.prod_id = t3.prod_id)))))
ORDER BY t0.colour_id DESC
이 쿼리는 원하는 결과 세트를 반환합니다. 그러나 볼 수있는 바와 같이 중복 결합을 생성하지만 이것은 벌레.
편집하다:
견딜 수 없는 같은 쿼리 Hibernate 에서이 기준 쿼리를 작성하는 방법은 잘못된 것 같습니다. 결합과 하위 쿼리의 조합은 올바른 SQL 쿼리를 생성합니다.
CriteriaBuilder criteriaBuilder=entityManager.getCriteriaBuilder();
CriteriaQuery<Colour>criteriaQuery=criteriaBuilder.createQuery(Colour.class);
Metamodel metamodel = entityManager.getMetamodel();
EntityType<Colour> entityType = metamodel.entity(Colour.class);
Root<Colour> root = criteriaQuery.from(entityType);
criteriaQuery.select(root);
Subquery<Long>subquery=criteriaQuery.subquery(Long.class);
Root<Colour> subRoot = subquery.from(Colour.class);
subquery.select(subRoot.get(Colour_.colourId));
SetJoin<Colour, Product> join = subRoot.join(Colour_.productSet, JoinType.INNER);
ParameterExpression<Long> parameterExpression=criteriaBuilder.parameter(Long.class);
criteriaQuery.where(criteriaBuilder.in(root.get(Colour_.colourId)).value(subquery).not());
subquery.where(criteriaBuilder.equal(join.get(Product_.prodId), parameterExpression));
criteriaQuery.orderBy(criteriaBuilder.desc(root.get(Colour_.colourId)));
TypedQuery<Colour> typedQuery = entityManager.createQuery(criteriaQuery);
List<Colour> list = typedQuery.setParameter(parameterExpression, 1L).getResultList();
이렇게하면 다음 SQL 쿼리가 생성되어 MySQL에 위임됩니다.
SELECT t0.colour_id, t0.colour_name, t0.colour_hex
FROM projectdb.colour t0
WHERE NOT (t0.colour_id IN
(SELECT t1.colour_id
FROM prod_colour t3, projectdb.product t2, projectdb.colour t1
WHERE ((t2.prod_id = ?)
AND ((t3.colour_id = t1.colour_id)
AND (t2.prod_id = t3.prod_id)))))
ORDER BY t0.colour_id DESC