从提示符运行 powershell 脚本时，SQL Server 2008 不使用备份设备路径

Posted 2023-05-08

【中文标题】从提示符运行 powershell 脚本时，SQL Server 2008 不使用备份设备路径

【英文标题】：SQL Server 2008 doesn't use backup device path when running powershell script from prompt

【发布时间】：2013-11-15 17:16:25

【问题描述】：

我制作了一个脚本来备份我的远程服务器的所有数据库。当我从 PowerShell ISE 界面运行脚本时，我在备份设备中确定的路径工作正常，但是当我从提示符运行它时，我设置的路径被忽略，并且备份到 SQL Server 的默认备份目录.为什么会这样，我该如何解决？ 以下是我的脚本：

$DestSqlTpb = "E:\BackupBD\SQL-TPB-01\";
$PastaRede = "\\sql-tpb1-01\BackupBD\SQL-TPB-01\";
Write-Output ("Started DELETE at: " + (Get-Date -format yyyy-MM-dd-HH:mm:ss));    
$ComandoDeleteRede = $PastaRede + "*"
remove-item $ComandoDeleteRede
$ComandoSqlTpbLocal = $DestSqlTpb + "*"
remove-item $ComandoSqlTpbLocal
Write-Output ("Finished DELETE at: " + (Get-Date -format yyyy-MM-dd-HH:mm:ss));    
[void][System.Reflection.Assembly]::LoadWithPartialName('Microsoft.SqlServer.ConnectionInfo');            
[void][System.Reflection.Assembly]::LoadWithPartialName('Microsoft.SqlServer.Management.Sdk.Sfc');            
[void][System.Reflection.Assembly]::LoadWithPartialName('Microsoft.SqlServer.SMO');
[void][System.Reflection.Assembly]::LoadWithPartialName('Microsoft.SqlServer.SMOExtended');  
$Server = "SQL-TPB1-01\SQL2008";     # SQL Server Instance.    
$srv = new-object ("Microsoft.SqlServer.Management.Smo.Server") $Server

Write-Output ("Started SQL-TPB1-01 at: " + (Get-Date -format yyyy-MM-dd-HH:mm:ss));
$dbs = $srv.Databases
foreach ($db in $dbs) 

  if (($db.Name -ne "tempdb") -and (!$db.IsDatabaseSnapshot)) #We don't want to backup the tempdb database 
  
    $timestamp = Get-Date -format yyyy-MM-dd-HH-mm-ss;
    $backup = New-Object ("Microsoft.SqlServer.Management.Smo.Backup");            
    $backup.Action = "Database";            
    $backup.Database = $db.Name;            
    $backup.Devices.AddDevice($Dest + $db.Name + "_full_" + $timestamp + ".bak", "File");            
    $backup.BackupSetDescription = "Full backup of " + $db.Name + " " + $timestamp;            
    $backup.Incremental = 0;     
    $backup.CompressionOption = 1;
    # Starting full backup process.            
    $backup.SqlBackup($srv);     
    # For db with recovery mode <> simple: Log backup.            
    If ($db.RecoveryModel -ne 3)            
                
        $timestamp = Get-Date -format yyyy-MM-dd-HH-mm-ss;            
        $backup = New-Object ("Microsoft.SqlServer.Management.Smo.Backup");            
        $backup.Action = "Log";            
        $backup.Database = $db.Name;            
        $backup.Devices.AddDevice($Dest + $db.Name + "_log_" + $timestamp + ".trn", "File");            
        $backup.BackupSetDescription = "Log backup of " + $db.Name + " " + $timestamp;            
        #Specify that the log must be truncated after the backup is complete.            
        $backup.LogTruncation = "Truncate";
        # Starting log backup process            
        $backup.SqlBackup($srv);    
    ;
  ;
;
Write-Output ("Finished SQL-TPB1-01 at: " + (Get-Date -format yyyy-MM-dd-HH:mm:ss));
Write-Output ("Started COPY at: " + (Get-Date -format yyyy-MM-dd-HH:mm:ss));    
copy-item $ComandoDeleteRede $DestSqlTpb
Write-Output ("Finished COPY at: " + (Get-Date -format yyyy-MM-dd-HH:mm:ss));    

当我只是从 ISE 运行时，它运行良好，但如果我保存 ps1 文件并从提示符执行，设备中的路径将被忽略。提示

【问题讨论】：

任何最终和完整的源代码脚本都可以工作吗？

【参考方案1】：

我打赌问题出在这条线上：

$backup.Devices.AddDevice($Dest + $db.Name + "_full_" + $timestamp + ".bak", "File"); 

您正在使用 $Dest 变量，该变量未在脚本中的任何位置定义。我敢打赌，您在 ISE 会话中将 $Dest 变量设置为您想要的路径，这就是它在那里工作的原因。

但在新的控制台窗口中，$Dest 为空，因此 SQL 使用默认路径。