另外,很多标准数据库的特征并没有出现在SQLite里,比如著名的外键(FOREIGN KEY)约束,嵌套事务(nested transactions),RIGHT OUTER JOIN,FULL OUTER JOIN 以及 ALTER TABLE 的一些用法。
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active real-time nested transactions 主动实时嵌套事务
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Active Record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。
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