Question

我正在尝试创建一个脚本，使用Write-DataTable函数将源数据从多个数据库服务器导入一个中央数据存储库（源代码here）。如果目标表（RPRMBSDEVDB81.dba_rep..DBBakSizes）为空，我想出的脚本是有效的，但是，如果表中有数据它会爆炸。

我在做什么：

我通过SQL Server Mgmt Studio从目标表中删除所有内容。
我运行PowerShell脚本，它运行成功，数据最终在表格中。
我通过SSMS从目标表中删除一台服务器的数据。
我再次运行PowerShell脚本，验证我的数据表中有唯一数据，并且它出错（请参阅我脚本下方的完整错误）。

我的剧本：

#Clear screen (for testing)
Clear-Host

#SQLCMD timeout parameter
$QueryTimeout = 120

#Get list of servers to import data from
$sql_serverlist = "
SELECT sl.HostName
    ,sl.ServerName + '.' + sl.Domain AS ServerName
    ,ISNULL(MAX(bs.ReportDate),'1/1/1980') AS ReportDate
FROM dbo.ServerList sl
    LEFT OUTER JOIN dbo.DBBakSizes bs ON bs.ServerName = sl.HostName
WHERE sl.Import = 1
AND sl.Active = 1
GROUP BY sl.HostName
    ,sl.ServerName + '.' + sl.Domain;
"
$servers = Invoke-Sqlcmd -ServerInstance RPRMBSDEVDB81 -Database dba_rep -Query $sql_serverlist

#Define path to Write-DataTable module
$Location = "C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\Modules\Write-DataTable"
#Load Write-DataTable module
Import-Module $Location\Write-DataTable.psm1

#Setup DataTable
$dt = New-Object Data.DataTable
$col1 = New-Object Data.DataColumn ServerName,([string])
$col2 = New-Object Data.DataColumn DatabaseName,([string])
$col3 = New-Object Data.DataColumn BackupType,([string])
$col4 = New-Object Data.DataColumn UsedCompression,([int])
$col5 = New-Object Data.DataColumn UsedChecksum,([int])
$col6 = New-Object Data.DataColumn MostRecentFull_Date,([datetime])
$col7 = New-Object Data.DataColumn MostRecentFull_Sec,([int])
$col8 = New-Object Data.DataColumn MostRecentFull_MB,([int])
$col9 = New-Object Data.DataColumn MostRecentOther,([string])
$col10 = New-Object Data.DataColumn MostRecentOther_Date,([datetime])
$col11 = New-Object Data.DataColumn MostRecentOther_Sec,([int])
$col12 = New-Object Data.DataColumn MostRecentOther_MB,([int])
$col13 = New-Object Data.DataColumn ReportDate,([datetime])
$dt.columns.add($col1)
$dt.columns.add($col2)
$dt.columns.add($col3)
$dt.columns.add($col4)
$dt.columns.add($col5)
$dt.columns.add($col6)
$dt.columns.add($col7)
$dt.columns.add($col8)
$dt.columns.add($col9)
$dt.columns.add($col10)
$dt.columns.add($col11)
$dt.columns.add($col12)
$dt.columns.add($col13)

#Loop through servers and pull in bak file data
foreach ($server in $servers)
{
    #Retrieve ServerName and MAX(ReportDate) from array
    $hostname = $server[0]
    $servername = $server[1]
    $reportdate = $server[2].ToString()

    #Build SQL to retrieve records for import
    $sql_bakdata = "
    SELECT  '$hostname' AS ServerName
        ,DatabaseName
        ,BackupType
        ,UsedCompression
        ,UsedChecksum
        ,MostRecentFull_Date
        ,MostRecentFull_Sec
        ,MostRecentFull_MB
        ,MostRecentOther
        ,MostRecentOther_Date
        ,MostRecentOther_Sec
        ,MostRecentOther_MB
        ,ReportDate
    FROM rp_util.dbo.DBBakSizes
    WHERE CAST(ReportDate AS SMALLDATETIME) > '$reportdate';
    "

    #Run SQL and capture results in array
    $dt += Invoke-Sqlcmd -ServerInstance $servername -Query $sql_bakdata -QueryTimeout $QueryTimeout
}

#Load data
Write-DataTable -ServerInstance "RPRMBSDEVDB81" -Database "dba_rep" -TableName "DBBakSizes" -Data $dt

错误：

Write-DataTable : System.Management.Automation.MethodInvocationException:
Exception calling "WriteToServer" with "1" argument(s): "Object reference not
set to an instance of an object." ---> System.NullReferenceException: Object
reference not set to an instance of an object.
   at System.Data.SqlClient.SqlBulkCopy.WriteToServer(DataRow[] rows)
   at WriteToServer(Object , Object[] )
   at System.Management.Automation.DotNetAdapter.AuxiliaryMethodInvoke(Object target, Object[] arguments, MethodInformation methodInformation, Object[] originalArguments)
   --- End of inner exception stack trace ---
   at System.Management.Automation.DotNetAdapter.AuxiliaryMethodInvoke(Object target, Object[] arguments, MethodInformation methodInformation, Object[] originalArguments)
   at System.Management.Automation.ParserOps.CallMethod(Token token, Object target, String methodName, Object[] paramArray, Boolean callStatic, Object valueToSet)
   at System.Management.Automation.MethodCallNode.InvokeMethod(Object target, Object[] arguments, Object value)
   at System.Management.Automation.MethodCallNode.Execute(Array input, Pipe outputPipe, ExecutionContext context)
   at System.Management.Automation.ParseTreeNode.Execute(Array input, Pipe outputPipe, ArrayList& resultList, ExecutionContext context)
   at System.Management.Automation.StatementListNode.ExecuteStatement(ParseTreeNode statement, Array input, Pipe outputPipe, ArrayList& resultList, ExecutionContext context).Message
At line:2 char:16
+ Write-DataTable <<<<  -ServerInstance "RPRMBSDEVDB81" -Database "dba_rep" -TableName "DBBakSizes" -Data $dt
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Write-DataTable

Answer 1

放弃Write-DataTable。我的脚本现在循环遍历DataTable并通过痛苦的行插入行。

#Load data
#Write-DataTable -ServerInstance "RPRMBSDEVDB81" -Database "dba_rep" -TableName "DBBakSizes" -Data $dt
$SqlConnection = new-object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Server=$DBServer; Database=$DBName; Integrated Security=SSPI;"
$SqlConnection.Open()
$SqlCommand = new-object System.Data.SqlClient.SqlCommand
$SqlCommand.Connection = $SqlConnection

foreach ($dtrow in $dt)
{
  If ($dtrow.ServerName) #Skip NULL/empty records
  {
    $SqlInsert = "INSERT dbo.DBBakSizes VALUES('$($dtrow.ServerName)','$($dtrow.DatabaseName)','$($dtrow.BackupType)',$($dtrow.UsedCompression),$($dtrow.UsedChecksum),'$($dtrow.MostRecentFull_Date)',$($dtrow.MostRecentFull_Sec),$($dtrow.MostRecentFull_MB),'$($dtrow.MostRecentOther)','$($dtrow.MostRecentOther_Date)',$($dtrow.MostRecentOther_Sec),$($dtrow.MostRecentOther_MB),'$($dtrow.ReportDate)')" 
    $SqlCommand.CommandText = $SqlInsert
    $SqlCommand.ExecuteNonQuery()
  }
}

$SqlConnection.Close()

写入SQL Server表时Write-DataTable行为不一致

1 个答案: