Permitting nesting leads to situations where the internal transactions succeed, but the parent can still fail — so how do you roll back previously committed children?
允许嵌套会导致内部事务成功，但父事务仍旧可以失败的情况——那么您如何回滚先前提交了的子事务呢？
If you want your children to succeed, teach them how to fail.
如果你希望你的孩子成功，那么教育他们如何失败。
If you want your children to succeed, teach them how to fail.
如果你希望你的孩子成功，那么教育他们如何失败。
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