MYSQL回滚,当发生外键约束等错误时,会自动回滚吗?
是否需要自己手动判断外键,然后手动rollback?
回复讨论(解决方案)
什么叫 自动回滚？ 回滚 到哪里？
既然发生错误，正在执行的指令就什么都没做，所以也不存在回滚
当存在外键约束时也一样，并不存在主表成功子表失败或自表成功主表失败的情况，MySQL 会自行验证，只在都成功的情况下才会完成操作
所谓事务回滚并非 MySQL 的功能，而是用户的一种需求。mysql 只是提供一个容器，来帮助用户实现
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