冬眠HQL不同WITH和WHERE

Question

嗨之间： 我只是学习有关HQL

谁能解释或提供HQL WITH和WHERE约不同的一些链接？

从

http://docs.jboss.org/hibernate/core/3.3/reference/en/html/queryhql.html

例子，如：

从猫的猫 左加入cat.kittens如小猫 与kitten.bodyWeight> 10.0

我可以用取代与其中？

THX

Answer 1

With是用来“供应额外加入的条件”，这意味着它被添加到加入和不where子句：

from Cat as cat 
    left join cat.kittens as kitten 
    with kitten.bodyWeight > 10.0 

将被转换为这样的事;

from Cat as cat 
    left outer join Cat as kitten 
    on cat.id = kitten.mother_id 
     and kitten.bodyWeight > 10.0 

而此

from Cat as cat 
    left join cat.kittens as kitten 
where kitten.bodyWeight > 10.0 

被转换为

from Cat as cat 
    left outer join Cat as kitten 
    on cat.id = kitten.mother_id 
where 
    kitten.bodyWeight > 10.0 

Answer 2

取代 “与” 和 “其中” 限制了结果猫该具有小猫与体重> 10.0。 使用“与”甚至猫没有小猫。