這是可能得到的備份數據文件的細節通過使用RESTORE FILELISTONLY
。
您可以將此信息放入可用於通過將其插入臨時表或表變量中來構建恢復語句的表中。要將它集成到您現有的代碼中:
DECLARE @fileListTable TABLE
(
LogicalName NVARCHAR(128),
PhysicalName NVARCHAR(260),
[Type] CHAR(1),
FileGroupName NVARCHAR(128),
SIZE NUMERIC(20,0),
MaxSize NUMERIC(20,0),
FileID BIGINT,
CreateLSN NUMERIC(25,0),
DropLSN NUMERIC(25,0),
UniqueID UNIQUEIDENTIFIER,
ReadOnlyLSN NUMERIC(25,0),
ReadWriteLSN NUMERIC(25,0),
BackupSizeInBytes BIGINT,
SourceBlockSize INT,
FileGroupID INT,
LogGroupGUID UNIQUEIDENTIFIER,
DifferentialBaseLSN NUMERIC(25,0),
DifferentialBaseGUID UNIQUEIDENTIFIER,
IsReadOnly BIT,
IsPresent BIT,
TDEThumbprint VARBINARY(32)
)
--This schema works from SQL 2008 to SQL 2014.
--SQL 2005 didn't have the TDEThumbprint column, but is otherwise the same.
INSERT INTO @fileListTable EXEC('restore filelistonly
FROM DISK = N''%BACKUPFILENAME%''')
DECLARE @datafile NVARCHAR(128), @logfile NVARCHAR(128)
SELECT @datafile = LogicalName FROM @fileListTable WHERE Type = 'D'
SELECT @logfile = LogicalName FROM @fileListTable WHERE Type = 'L'
RESTORE DATABASE [%NewDB%]
FROM DISK = N'%BACKUPFILENAME%'
WITH RECOVERY,
MOVE @datafile TO N'C:\%NewDB%.mdf',
MOVE @logfile TO N'C:\%NewDB%_Log.ldf'
在具有更多數據/日誌文件的情況下,代碼需要相應更復雜。
解決衝突文件名可能性的一種方法是將時間戳,GUID或其他合理唯一的標識符附加到新文件名。