在SQL Server中如何检测UNC folder 存在

DECLARE @File_Exists INT

EXEC Master.dbo.xp_fileexist '\\serverB\SQL_Backup\file.bak', @File_Exists OUT

print @File_Exists
1

And if check folder, can use "nul", but it doesn't work for UNC path

DECLARE @File_Exists INT

EXEC Master.dbo.xp_fileexist '\\serverB\SQL_Backup\nul', @File_Exists OUT

print @File_Exists

0

If use xp_subdirs like:

EXEC master.dbo.xp_subdirs '\\serverB\SQL_Backups'

If the folder doesn't exists,

Msg 22006, Level 16, State 1, Line 3
xp_subdirs could not access '\\ServerB\SQL_Backups\*.*': FindFirstFile() returned error 67, 'The network name cannot be found.'

检测文件都正常，就是检测文件的文件夹就失败或者返回错误结果。