DROPSCHEMA 过程在事务控制下执行，它自己不执行提交或回退。

The DROPSCHEMA procedure is under transaction control and does not perform commit or rollback on its own.

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循环和事件处理程序通常意味着控制流回退，这表明状态机是一种更合适的实现方法。

Loops and event handlers usually imply that the control flow is going back, which suggests that state machine is a more suitable implementation.

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最重要的区别在于，你要做的只是修改一下控制台参数去运行不同的版本，而不是回退代码重新编译。

The difference between changing a console variable to get a different behavior versus running an old exe, let alone reverting code changes and rebuilding, is significant.

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