Hibernate在删除一个游离对象的时候，是不会更新该游离对象的

最新推荐文章于 2019-11-04 15:46:58 发布

zjlolife

最新推荐文章于 2019-11-04 15:46:58 发布

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本文链接：https://blog.youkuaiyun.com/zjlolife/article/details/9358433

本文记录了一次级联删除操作的过程，其中包括将教师ID设为空以解除学生与教师之间的关联，随后删除了指定的学生及教师记录。通过SQL语句展示了如何实现这一过程。

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不会更新该游离对象，但是可以级联删除该游离对象关键的对象。

 update
        t_student 
    set
        teacherid=null 
    where
        teacherid=?
17:34:40,079 DEBUG AbstractCollectionPersister:1127 - done deleting collection
17:34:40,080 DEBUG AbstractBatcher:66 - Executing batch size: 1
17:34:40,082 DEBUG AbstractBatcher:418 - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
17:34:40,083 DEBUG AbstractBatcher:410 - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
17:34:40,083 DEBUG SQL:111 - 
    delete 
    from
        t_student 
    where
        id=?
17:34:40,084 DEBUG AbstractBatcher:248 - reusing prepared statement
17:34:40,084 DEBUG SQL:111 - 
    delete 
    from
        t_student 
    where
        id=?
17:34:40,085 DEBUG AbstractBatcher:66 - Executing batch size: 2
17:34:40,088 DEBUG Expectations:77 - success of batch update unknown: 0
17:34:40,088 DEBUG Expectations:77 - success of batch update unknown: 1
17:34:40,088 DEBUG AbstractBatcher:418 - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
17:34:40,088 DEBUG AbstractBatcher:410 - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
17:34:40,089 DEBUG SQL:111 - 
    delete 
    from
        t_teacher 
    where
        id=?