Third, write the KeyManger class to maintain the surrogate keys for each registered table. The KeyManager class will provide two methods.

第三，编写KeyManger类来维护每个已注册表的代理键。

youdao

Third, write the KeyManger class to maintain the surrogate keys for each registered table. The KeyManager class will provide two methods.

第三，编写KeyManger类来维护每个已注册表的代理键。

youdao