Person类中包含有MyEvent这个类 java
public class Person{ private Long id; private String name; private MyEvent myEvent; }
from Person 或者 from Person as p
from Person as p where p.myEvent.title = :title
注意:hibernate3.2.3以前老是对的。
hibernate3.2.3以后若是myEvent是普通属性或关联的实体也是对的,若是myEvent是一个集合会出异常
所以hibernate推荐使用下面的方式:
select p from Person as p inner join p.myEvent as e where e.title = :title
from Person as p inner join p.myEvent as event where event.title = : title
注:查询出来是:是一个集合,集合元素是Person,myEvent组成的数组。
结果类型: List<Person,Event>
from Person as p left outer join p.myEvent as event where event.title = : title
注意:查询出来是:是一个集合,集合元素是Person,myEvent组成的数组。
结果类型: List<Person,Event>数组
from Person as p right outer join p.myEvent as event where event.title = : title
from Person as p full join p.myEvent as event where event.title = : title
select p.name from Person as p
select p.name,p from Person as p
select new List(p.name,p.address) from Person as p
select new ClassTest(p.name,p.address) from Person as p
注意:前提ClassTest 类有两个参数的构造器。 spa
select new map(p.name as personName) from Person as p