当涉及到复合谓词时,我遇到了 Hibernate EntityManager 3.5.3-Final 的问题。
示例(不是实际的代码片段,但想法应该很清楚):
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
Predicate predicate1 = criteriaBuilder.conjunction();
Predicate predicate2 = criteriaBuilder.conjunction();
// These are Boolean expression with common Root
predicate1.getExpressions().add(expression1);
predicate1.getExpressions().add(expression2);
predicate2.getExpressions().add(expression3);
predicate2.getExpressions().add(expression4);
//...
query.where(criteriaBuilder.or(predicate1, predicate2));
现在,我会期待这样的事情:
SELECT ... FROM ... WHERE (expression1 AND expression2) OR (expression3 AND expression4)
但是我最终得到:
SELECT ... FROM ... WHERE expression1 AND expression2 OR expression3 AND expression4
我做错了什么还是休眠问题?