全自动SQL Server还原

Question

我对SQL Server命令不太熟悉.

我需要一个脚本来从.bak文件恢复数据库,并将logical_data和logical_log文件移动到特定路径.

我可以:

restore filelistonly from disk='D:\backups\my_backup.bak'

这将给我一个带有列的结果集LogicalName,接下来我需要使用restore命令中结果集中的逻辑名称:

restore database my_db_name from disk='d:\backups\my_backups.bak' with file=1,
move 'logical_data_file' to 'd:\data\mydb.mdf',
move 'logical_log_file' to 'd:\data\mylog.ldf'

如何将第一个结果集中的逻辑名称捕获到可以提供给"move"命令的变量中？

我认为解决方案可能很简单,但我对SQL Server很新.

Answer 1

这是完全自动恢复T-SQL存储过程.接受三(3)个参数.

1. 目标数据库
2. 源数据库
3. 完全合格的备份文件名称位置
   (\\yourserver\yourshare\backupfile.bak或简称c:\backup.bak)

CREATE PROC [dbo].[restoreDB]
    @p_strDBNameTo SYSNAME,
    @p_strDBNameFrom SYSNAME,
    @p_strFQNRestoreFileName VARCHAR(255)
AS 
    DECLARE 
        @v_strDBFilename VARCHAR(100),
        @v_strDBLogFilename VARCHAR(100),
        @v_strDBDataFile VARCHAR(100),
        @v_strDBLogFile VARCHAR(100),
        @v_strExecSQL NVARCHAR(1000),
        @v_strExecSQL1 NVARCHAR(1000),
        @v_strMoveSQL NVARCHAR(4000),
        @v_strREPLACE NVARCHAR(50),
        @v_strTEMP NVARCHAR(1000),
        @v_strListSQL NVARCHAR(4000),
        @v_strServerVersion NVARCHAR(20)

    SET @v_strREPLACE = ''   
    IF exists (select name from sys.databases where name = @p_strDBNameTo)
        SET @v_strREPLACE = ', REPLACE'

    SET @v_strListSQL = ''
    SET @v_strListSQL = @v_strListSQL + 'IF (EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = ''##FILE_LIST''))'
    SET @v_strListSQL = @v_strListSQL + 'BEGIN'
    SET @v_strListSQL = @v_strListSQL + '   DROP TABLE ##FILE_LIST '
    SET @v_strListSQL = @v_strListSQL + 'END '

    SET @v_strListSQL = @v_strListSQL + 'CREATE TABLE ##FILE_LIST ('
    SET @v_strListSQL = @v_strListSQL + '   LogicalName VARCHAR(64),'
    SET @v_strListSQL = @v_strListSQL + '   PhysicalName VARCHAR(130),'
    SET @v_strListSQL = @v_strListSQL + '   [Type] VARCHAR(1),'
    SET @v_strListSQL = @v_strListSQL + '   FileGroupName VARCHAR(64),'
    SET @v_strListSQL = @v_strListSQL + '   Size DECIMAL(20, 0),'
    SET @v_strListSQL = @v_strListSQL + '   MaxSize DECIMAL(25,0),'
    SET @v_strListSQL = @v_strListSQL + '   FileID bigint,'
    SET @v_strListSQL = @v_strListSQL + '   CreateLSN DECIMAL(25,0),'
    SET @v_strListSQL = @v_strListSQL + '   DropLSN DECIMAL(25,0),'
    SET @v_strListSQL = @v_strListSQL + '   UniqueID UNIQUEIDENTIFIER,'
    SET @v_strListSQL = @v_strListSQL + '   ReadOnlyLSN DECIMAL(25,0),'
    SET @v_strListSQL = @v_strListSQL + '   ReadWriteLSN DECIMAL(25,0),'
    SET @v_strListSQL = @v_strListSQL + '   BackupSizeInBytes DECIMAL(25,0),'
    SET @v_strListSQL = @v_strListSQL + '   SourceBlockSize INT,'
    SET @v_strListSQL = @v_strListSQL + '   filegroupid INT,'
    SET @v_strListSQL = @v_strListSQL + '   loggroupguid UNIQUEIDENTIFIER,'
    SET @v_strListSQL = @v_strListSQL + '   differentialbaseLSN DECIMAL(25,0),'
    SET @v_strListSQL = @v_strListSQL + '   differentialbaseGUID UNIQUEIDENTIFIER,'
    SET @v_strListSQL = @v_strListSQL + '   isreadonly BIT,'
    SET @v_strListSQL = @v_strListSQL + '   ispresent BIT'

    SELECT @v_strServerVersion = CAST(SERVERPROPERTY ('PRODUCTVERSION') AS NVARCHAR)

    IF @v_strServerVersion LIKE '10.%' 
        BEGIN
            SET @v_strListSQL = @v_strListSQL + ', TDEThumbpr DECIMAL'
            --PRINT @v_strServerVersion
        END

    SET @v_strListSQL = @v_strListSQL + ')'

    EXEC (@v_strListSQL)


    INSERT INTO ##FILE_LIST EXEC ('RESTORE FILELISTONLY FROM DISK = ''' + @p_strFQNRestoreFileName + '''')

    DECLARE curFileLIst CURSOR FOR 
        SELECT 'MOVE N''' + LogicalName + ''' TO N''' + replace(PhysicalName, @p_strDBNameFrom, @p_strDBNameTo) + ''''
          FROM ##FILE_LIST

    SET @v_strMoveSQL = ''

    OPEN curFileList 
    FETCH NEXT FROM curFileList into @v_strTEMP
    WHILE @@Fetch_Status = 0
    BEGIN
        SET @v_strMoveSQL = @v_strMoveSQL + @v_strTEMP + ', '
        FETCH NEXT FROM curFileList into @v_strTEMP
    END

    CLOSE curFileList
    DEALLOCATE curFileList

    PRINT 'Killing active connections to the "' + @p_strDBNameTo + '" database'

    -- Create the sql to kill the active database connections
    SET @v_strExecSQL = ''
    SELECT   @v_strExecSQL = @v_strExecSQL + 'kill ' + CONVERT(CHAR(10), spid) + ' '
    FROM     master.dbo.sysprocesses
    WHERE    DB_NAME(dbid) = @p_strDBNameTo AND DBID <> 0 AND spid <> @@spid

    EXEC (@v_strExecSQL)

    PRINT 'Restoring "' + @p_strDBNameTo + '" database from "' + @p_strFQNRestoreFileName + '" with '
    PRINT '  data file "' + @v_strDBDataFile + '" located at "' + @v_strDBFilename + '"'
    PRINT '  log file "' + @v_strDBLogFile + '" located at "' + @v_strDBLogFilename + '"'

    SET @v_strExecSQL = 'RESTORE DATABASE [' + @p_strDBNameTo + ']'
    SET @v_strExecSQL = @v_strExecSQL + ' FROM DISK = ''' + @p_strFQNRestoreFileName + ''''
    SET @v_strExecSQL = @v_strExecSQL + ' WITH FILE = 1,'
    SET @v_strExecSQL = @v_strExecSQL + @v_strMoveSQL
    SET @v_strExecSQL = @v_strExecSQL + ' NOREWIND, '
    SET @v_strExecSQL = @v_strExecSQL + ' NOUNLOAD '
    SET @v_strExecSQL = @v_strExecSQL + @v_strREPLACE


    --PRINT '---------------------------'
    --PRINT @v_strExecSQL
    --PRINT '---------------------------'


    EXEC sp_executesql @v_strExecSQL

Answer 2

RESTORE FILELISTONLY生成MSDN中记录的结果集.然后,您需要迭代此结果集并构建适当的RESTORE ... MOVE ...如何捕获和迭代结果集取决于您的环境.在C#应用程序中,您将使用SqlDataReader.在纯T-SQL中,您将使用INSERT ... EXEC.

纯SQL解决方案的框架将是:

declare @filelist table (LogicalName nvarchar(128), PhysicalName nvarchar(260), Type char(1), FilegroupName varchar(10), size int, MaxSize bigint, field int, createlsn bit, droplsn bit, uniqueid uniqueidentifier, readonlylsn bit, readwritelsn bit, backupsizeinbytes bigint, sourceblocksize int, filegroupid int, loggroupguid uniqueidentifier, differentialbaselsn bit, differentialbaseguid uniqueidentifier, isreadonly bit, ispresent bit, tdethumbprint varchar(5));
insert into @filelist exec sp_executesql N'restore filelistonly from disk=''D:\backups\my_backup.bak''';

set @sql = N'RESTORE database my_database from disk ''D:\backups\my_backup.bak'' with ';
select @sql = @sql + N' move ' + LogicalName + N' to ' udf_localFilePath(PhysicalName) + N','
from @filelist;

set @sql = substring(@sql, 1, len(@sql)-1); -- remove last ','
exec sp_executesql @sql;

这不是实际的工作代码,只是为了让你了解.您还可以使用游标而不是@sql的非标准赋值内部查询构造

请注意,结果集中的列列表RESTORE FILELISTONLY在SQL Server版本之间有所不同.请参阅目标版本规范以获取正确的列表.

Answer 3

运用

• http://www.karaszi.com/SQLServer/util_restore_all_in_file.asp
• http://weblogs.sqlteam.com/dang/archive/2009/06/13/Restore-Database-Stored-Procedure.aspx

作为参考,我想出了这个...我觉得它有效(没有测试多个文件的备份)

DECLARE @FileList TABLE
      (
      LogicalName nvarchar(128) NOT NULL,
      PhysicalName nvarchar(260) NOT NULL,
      Type char(1) NOT NULL,
      FileGroupName nvarchar(120) NULL,
      Size numeric(20, 0) NOT NULL,
      MaxSize numeric(20, 0) NOT NULL,
      FileID bigint NULL,
      CreateLSN numeric(25,0) NULL,
      DropLSN numeric(25,0) NULL,
      UniqueID uniqueidentifier NULL,
      ReadOnlyLSN numeric(25,0) NULL ,
      ReadWriteLSN numeric(25,0) NULL,
      BackupSizeInBytes bigint NULL,
      SourceBlockSize int NULL,
      FileGroupID int NULL,
      LogGroupGUID uniqueidentifier NULL,
      DifferentialBaseLSN numeric(25,0)NULL,
      DifferentialBaseGUID uniqueidentifier NULL,
      IsReadOnly bit NULL,
      IsPresent bit NULL,
      TDEThumbprint varbinary(32) NULL
 );

 declare @RestoreStatement nvarchar(max), @BackupFile nvarchar(max);

 set @BackupFile = 'D:\mybackup.bak'

 SET @RestoreStatement =  N'RESTORE FILELISTONLY
      FROM DISK=N''' + @BackupFile + ''''

INSERT INTO @FileList
      EXEC(@RestoreStatement);

declare @logical_data nvarchar(max), @logical_log nvarchar(max);

set @logical_data = (select LogicalName from @FileList where Type = 'D' and FileID = 1)
set @logical_log = (select LogicalName from @FileList where Type = 'L' and FileID = 2)