PowerShell:基于SQL数据集创建和删除文件夹

我正在尝试编写一个PowerShell脚本,该脚本将执行以下操作:

1. 执行存储过程或运行返回值列表的t-SQL命令。
2. 将步骤1中的数据与现有文件目录结构进行比较。
4. 删除现有目录结构中不在步骤1中的值的目录。

我已经使用SSIS构建了一个类似的进程,但是我想尝试将其移到PowerShell脚本中,因为我怀疑它的性能会比我当前的SSIS包好得多。我最终自己找到了答案,代码如下。

如果有人发布一种更快的方法来删除丢失的文件夹,而不必遍历每个文件夹的数据集,那就太好了,但是我还没有找到一种方法。我尝试了-包含和比较对象,但我无法找到实现目标的方法。

$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Server = ServerName; Database = DatabaseName; Integrated Security = True"
$SqlCmd = New-Object System.Data.SqlClient.SqlCommand
$SqlCmd.CommandText = "SELECT DISTINCT folder = CONVERT(VARCHAR(MAX), id) FROM Some.Table (NOLOCK);"
$SqlCmd.Connection = $SqlConnection
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
$SqlAdapter.SelectCommand = $SqlCmd
$DataSet = New-Object System.Data.DataSet
$SqlAdapter.Fill($DataSet)
$SqlConnection.Close()

$RootDirectory = "\\Some\Root\Directory\Over\There\"

# Delete folders if they shouldn't exist.
$RootDirectoryChildItems = Get-ChildItem $RootDirectory
foreach ($i in $RootDirectoryChildItems)
{
    $Matched = 0
    $TargetDirectory = $RootDirectory + $i.Name

    $DataSetTableRows = $DataSet.Tables[0].Rows
    foreach ($Row in $DataSetTableRows)
    {
        if ($Row.folder -eq $i.Name)
        {
            $Matched = 1
        }
    }

    if ($Matched -eq 0)
    {
        Write-Output 'Deleted folder' $TargetDirectory; Remove-Item $TargetDirectory -Recurse | Out-Null
    }
}

# Create folders if they don't exist.
$DataSetTableRows = $DataSet.Tables[0].Rows
foreach ($Row in $DataSetTableRows)
{  
    $TargetDirectory = $RootDirectory + $Row.folder
    if (!(Test-Path $TargetDirectory))
    {
        Write-Output 'Created folder' $TargetDirectory '.'; New-Item $TargetDirectory -type directory | Out-Null
    }
}