我正在与一个绝对让我大吃一惊的问题作斗争。
我正在编写在部署期间从 powershell 执行的还原数据库脚本。
这是我的powershell脚本：
Param($RestoreDatabase, $RestoreDatabaseBackupPath, $RestoreDatabaseServer, $RestoreDatabaseUser)
Import-Module "SQLPS"
$sqlcmd="C:\Program Files\Microsoft SQL Server\110\Tools\Binn\sqlcmd.exe"
$variables = ("db=$RestoreDatabase","BackupPath=$RestoreDatabaseBackupPath","user=${RestoreDatabaseUser}")
$inputFile = Join-Path (Split-Path $MyInvocation.MyCommand.Path -Parent) restore.sql
Write-Output "Executing SQLCMD: inputFile=$inputFile, Variables=$variables, ServerInstance=$RestoreDatabaseServer"
Invoke-SQLCmd -InputFile $inputFile -Variable $variables -ServerInstance $RestoreDatabaseServer -AbortOnError -Verbose -QueryTimeout 65535
Restore.sql（这不是原始文件，但问题仍在重现）
print 'The first message is not repeating';
use master
GO
print 'Setting the single user mode'
alter database $(db) set single_user with rollback immediate
GO
一切看起来都很简单，但是 powershell 脚本的输出是：
WARNING: The names of some imported commands from the module 'SQLPS' include unapproved verbs that might make them less discoverable. To find the commands with unapproved verbs, run the Import-Module command again with the Verbose
parameter. For a list of approved verbs, type Get-Verb.
Executing SQLCMD: inputFile= C:\Path\To\Powershell\restore.sql, Variables=db=MY_DB_STAGING BackupPath=\\Storage\Backups\BACKUP.bak user=SERVERNAME\Checkee, ServerInstance=SERVERNAME\SQLEXPRESS
VERBOSE: The first message is not repeating
VERBOSE: Changed database context to 'master'.
VERBOSE: Setting the single user mode
VERBOSE: Setting the single user mode
Invoke-SQLCmd : The pipeline has been stopped.
At C:\Path\To\Powershell\Script.ps1:11 char:1
+ Invoke-SQLCmd -InputFile $inputFile -Variable $variables -ServerInstance $Restor ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [Invoke-Sqlcmd], PipelineStoppedException
+ FullyQualifiedErrorId : SqlExectionError,Microsoft.SqlServer.Management.PowerShell.GetScriptCommand
Invoke-SQLCmd : ALTER DATABASE failed because a lock could not be placed on database 'MY_DATABASE_STAGING'. Try again later.
ALTER DATABASE statement failed.
At C:\Path\To\Powershell\Script.ps1 :11 char:1
+ Invoke-SQLCmd -InputFile $inputFile -Variable $variables -ServerInstance $Restor ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [Invoke-Sqlcmd], SqlPowerShellSqlExecutionException
+ FullyQualifiedErrorId : SqlError,Microsoft.SqlServer.Management.PowerShell.GetScriptCommand
正如您所提到的，输出中有 2 条类似的行
VERBOSE: Setting the single user mode
我认为该命令以某种方式调用了两次，这就是无法放置锁的原因
我如何执行脚本：
powershell -file Script.ps1 -RestoreDatabase MY_DB_STAGING -RestoreDatabaseBackupPath \\Storage\Backups\BACKUP.bak -RestoreDatabaseServer SERVERNAME\SQLEXPRESS -RestoreDatabaseUser "SERVERNAME\Checkee"
PS一切都像ssms的魅力一样