Listing 12 shows a handler that will exit the procedure when SQL warnings and the not found conditions are encountered.
清单12展示了一个处理程序，它将在遇到SQL警告和not found条件时退出过程。
The login name you specified was not found. Please use a different login name or choose Cancel to exit the application.
指定的用户名没有找到。请使用一个不同的用户名或选择取消退出应用程序。
The password you specified was not found. Please try again or choose Cancel to exit the application.
指定的口令没有找到。请重试或选择取消退出应用程序。
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