将对象传递给PowerShell函数

我正试图将SQL适配器对象传递给PowerShell函数，但收到以下错误：

executeQueryAndFillTable:无法处理上的参数转换参数"da"。无法将"；System.Object[]"；类型的值"System.Object[]"；以键入"；System.Data.SqlClient.SqlDataAdapter"；。

这是代码

function sql_pull
{
    # define Objects
    $xmlDoc = New-Object System.Xml.XmlDocument
    $sqlConnection = New-Object System.Data.SqlClient.SqlConnection
    $sqlCommand = New-Object System.Data.SqlClient.SqlCommand
    $sqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
    $connectionString = "Password=$password;Persist Security Info=True;User ID=$userId;Data Source=$dataSource"
    $counter = 0
    # database queries 
    $queries = @(
    "Select * from sys.configurations for xml Raw ('Cretiria'), type, ROOT('sys.configurations'), ELEMENTS");
    $sqlConnection.ConnectionString = $connectionString
    $sqlCommand.Connection = $sqlConnection
    try {
        $sqlConnection.Open()
        
        foreach($q in $queries) 
        {
            $sqlCommand.CommandText = $q
            $sqlAdapter.SelectCommand = $sqlCommand.CommandText
            $sqlAdapter.SelectCommand.CommandTimeout = 300
            $res = executeQueryAndFillTable($sqlAdapter, $sqlCommand)              
        }
        $sqlConnection.Dispose()
        $sqlCommand.Dispose()
        $sqlAdapter.Dispose()
    } 
    catch
    {
        Throw
    }    
}
function executeQueryAndFillTable
{
    param(
        [System.Data.SqlClient.SqlDataAdapter]$da,
        [System.Data.SqlClient.SqlCommand] $command
    )
    $dataTable = New-Object System.Data.DataTable
    $da.SelectCommand = $command
    $da.Fill($dataTable)
    #check
    $data = $dataTable.Rows[0][0]
    return $data
}

executeQueryAndFillTable($sqlAdapter, $sqlCommand)

executeQueryAndFillTable $sqlAdapter $sqlCommand