If you don't make this assumption, you need to introduce nested transactions at the language level.
如果不做这样的假设，你需要在语言层面上引入内嵌的事务。
There are many Active Record updates in this release including the introduction of nested transactions.
该发布中有很多ActiveRecord更新，包括嵌套事务的引入。
Note that the same TCS can be used by nested transactions, ensuring that if the nested transaction fails, the parent transaction will also fail.
注意到嵌套的事务可以使用同一个TCS，确保如果嵌套事务失败了，那么父事务也将失败。
The transaction coordination diagram is used to show the constituents of a defined transaction, the order of processing (sequential vs. parallel), and nested transactions.
事务协调图用来显示确定的事务的构成、处理顺序（顺序的vs.并行的），及嵌套的事务。
The transaction coordination diagram is used to show the constituents of a defined transaction, the order of processing (sequential vs. parallel), and nested transactions.
事务协调图用来显示确定的事务的构成、处理顺序（顺序的vs.并行的），及嵌套的事务。
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