在 Azure Automation powershell 脚本中打印来自 SQL 的消息不起作用

Question

我创建了一个示例 Azure Automation Powershell Runbook。我正在尝试执行 SQL 命令，然后将来自该命令的消息打印到工作簿输出中。

我的代码取自 Capturing InfoMessage Output from SQL Server using PowerShell，如果我在本地运行它就可以工作：

Write-Output "Starting"

$conn = New-Object System.Data.SqlClient.SqlConnection "Data Source=abc.database.windows.net,1433;Initial Catalog=def;Integrated Security=False;User ID=ghj;Password=qwe"

## Attach the InfoMessage Event Handler to the connection to write out the messages 
$handler = [System.Data.SqlClient.SqlInfoMessageEventHandler] {param($sender, $event) Write-Output $event.Message }; 
$conn.add_InfoMessage($handler); 
$conn.FireInfoMessageEventOnUserErrors = $true;

$conn.Open();

$cmd = $conn.CreateCommand(); 
$cmd.CommandText = "PRINT 'This is the message from the PRINT statement'"; 
$cmd.ExecuteNonQuery(); 
$cmd.CommandText = "RAISERROR('This is the message from the RAISERROR statement', 10, 1)";  
$cmd.ExecuteNonQuery(); 
$conn.Close();

Write-Output "Done"

在我运行工作簿之后，我看到 Starting、-1（来自 ExecuteNotQuery 结果）和 Done，但没有来自 [=30 的消息=].

Register-ObjectEvent 来自 this answer 也不起作用：

Register-ObjectEvent : Cannot register for the specified event. 
An event with the name 'InfoMessage' does not exist. Parameter name: eventName

我做错了什么？

Answer 1

这是我用来获取打印语句的代码：

$connection = New-Object System.Data.SqlClient.SqlConnection
$connection.ConnectionString = "Server=..."

try {
    $connection.Open()

    $command = $connection.CreateCommand()
    $command.CommandText = "PRINT 'Hello World!';"

    Register-ObjectEvent -InputObject $connection -EventName InfoMessage -Action { Write-Host "$($event.SourceEventArgs)" } -SupportEvent

    $command.ExecuteNonQuery() | Out-Null
}
catch {
    throw $_.Exception.ToString()
}
finally {
    $connection.Dispose()
}

Answer 2

在 Azure 自动化中似乎存在在处理程序内部调用 Write-Output 或 Write-Host 的范围问题。将消息设置为处理程序中的全局变量，然后在 ExecuteNonQuery 达到我的目的后调用 Write-Output。

Write-Output "Starting"

$conn = New-Object System.Data.SqlClient.SqlConnection "Data Source=abc.database.windows.net,1433;Initial Catalog=def;Integrated Security=False;User ID=ghj;Password=qwe"

## Attach the InfoMessage Event Handler to the connection to write out the messages 
$handler = [System.Data.SqlClient.SqlInfoMessageEventHandler] {param($sender, $event) $global:message = $event.Message};
$conn.add_InfoMessage($handler); 
$conn.FireInfoMessageEventOnUserErrors = $true;

$conn.Open();

$cmd = $conn.CreateCommand(); 
$cmd.CommandText = "PRINT 'This is the message from the PRINT statement'"; 
$cmd.ExecuteNonQuery() | Out-Null; 
Write-Output $global:message
$cmd.CommandText = "RAISERROR('This is the message from the RAISERROR statement', 10, 1)";  
$cmd.ExecuteNonQuery() | Out-Null; 
Write-Output $global:message
$conn.Close();

Write-Output "Done"

如果您需要多条消息，您可以将它们连接到变量。

$handler = [System.Data.SqlClient.SqlInfoMessageEventHandler] {param($sender, $event) $global:message += $event.Message + "`n"};

但是，无论哪种情况，它们都不会在抛出时引发，而是在查询完成后引发。

编辑：我找到了一个我更喜欢的解决方案并想分享它。在处理程序中使用对象列表...

$events = new-object System.Collections.Generic.List[Object]
$handler = [System.Data.SqlClient.SqlInfoMessageEventHandler] { param($sender, $event) $events.Add($event) }

...并在 ExecuteNonQuery 循环后写入所有消息

ForEach($event in $events)
{
    Write-Output $event.Message
}

在 Azure Automation powershell 脚本中打印来自 SQL 的消息不起作用

Printing messages from SQL in Azure Automation powershell script doesn't work

sql-server

powershell

azure

azure-automation