Unexpected variable type returned by Receive-Job

Question

I\'m trying to execute the Invoke-Sqlcmd command (from the SqlServer module) to run a query as a different AD user. I know there\'s the -Credential

Answer 1

For those interested, below is the code I implemented. Depending on whether or not $credential is passed, Invoke-Sqlcmd will either run directly, or using a background job.

I had to use -As DataTables instead of -As DataSet, as the latter seems to have issues with serialisation/deserialisation (see accepted answer for more info).

function Exec-SQL($server, $database, $query, $credential) {

    $sqlData = @()

    $scriptBlock = {
        Param($params)

        Import-Module SqlServer
        return Invoke-Sqlcmd -ServerInstance $params.server -Database $params.database -query $params.query -As DataTables -OutputSqlErrors $true
    }

    if ($PSBoundParameters.ContainsKey("credential")) {

        $job = Start-Job -ScriptBlock $scriptBlock -Credential $credential -ArgumentList $PSBoundParameters
        $sqlData = Receive-Job -Job $job -Wait -AutoRemoveJob

    } else {
        $sqlData = & $scriptBlock -params $PSBoundParameters
    }
    return $sqlData
}