...如果在上一次测试恢复后执行了清理，然后马上再执行测试恢复，此恢复会失败，并显示错误消息： 文件已存在 (File already exists)。这通常在通过自动化代码而非通过 SRM 界面运行测试恢复时发生。
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Directory and file containers are automatically created if they do not already exist. For example, if my tablespace 0 needed to be redirected, I would issue these commands.
如果目录和文件容器都已不存在，该命令会自动创建它们。
If he file does not already exist, the installation application creates it.
如果此文件不存在，安装程序会创建它。
The file is created automatically if it doesn't already exist.
如果该文件尚不存在，则自动创建它。
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