Where to find array for this function get_sql_for_po_search_completed

im trying to find array for this function and added my own function.  temp_pr is my other table i wanted to show database inside of this temp.pr_number, temp.requested_by, temp.cost_center, temp.remarks, but i don't know where the array for this to be displayed.

function get_sql_for_po_search_sheet($from, $to, $supplier_id=ALL_TEXT, $location=ALL_TEXT,
    $order_number = '', $stock_id = '', $also_closed=false)
{
    $sql = "SELECT
        porder.order_no,
        porder.reference,
        temp.pr_number,
        temp.requested_by,
        temp.cost_center,
        temp.remarks,
        supplier.supp_name,
        location.location_name,
        porder.requisition_no,
        porder.ord_date,

        supplier.curr_code,
        Sum(line.unit_price*line.quantity_ordered) AS OrderValue,
        porder.into_stock_location,
        chk.isopen
        FROM ".TB_PREF."purch_orders as porder
                LEFT JOIN (
                    SELECT order_no, SUM(quantity_ordered-quantity_received + quantity_ordered-qty_invoiced) isopen
                    FROM ".TB_PREF."purch_order_details
                    GROUP BY order_no
                ) chk ON chk.order_no=porder.order_no,"
            .TB_PREF."purch_order_details as line, "
            .TB_PREF."suppliers as supplier, "
            .TB_PREF."temp_pr as temp, "
            .TB_PREF."locations as location
        WHERE porder.order_no = line.order_no
        AND porder.supplier_id = supplier.supplier_id
        AND location.loc_code = porder.into_stock_location ";

    if ($supplier_id != ALL_TEXT)
        $sql .= "AND supplier.supplier_id=".$supplier_id." ";
    if ($order_number != "")
    {
        $sql .= "AND porder.reference LIKE ".db_escape('%'. $order_number . '%');
    }
    else
    {

        $data_after = date2sql($from);
        $date_before = date2sql($to);

        $sql .= " AND porder.ord_date >= '$data_after'";
        $sql .= " AND porder.ord_date <= '$date_before'";

        if ($location != ALL_TEXT)
        {
            $sql .= " AND porder.into_stock_location = ".db_escape($location);
        }
        if ($stock_id !== '')
        {
            $sql .= " AND line.item_code=".db_escape($stock_id);
        }
        if ($supplier_id != ALL_TEXT)
            $sql .= " AND supplier.supplier_id=".db_escape($supplier_id);

    }

    if (!$also_closed)
        $sql .= " AND isopen";
    $sql .= " GROUP BY porder.order_no";
    return $sql;
}

I don't know where to find array for this to display my other table temp.pr_number, temp.requested_by, temp.cost_center, temp.remarks,

$sql = get_sql_for_po_search_sheet(get_post('OrdersAfterDate'), get_post('OrdersToDate'),
    get_post('supplier_id'), get_post('StockLocation'), get_post('order_number'),
    get_post('SelectStockFromList'), get_post('also_closed'));

$cols = array(
        _("#") => array('fun'=>'trans_view', 'ord'=>'', 'align'=>'right'),
        _("Reference"),
        _("Supplier") => array('ord'=>''),
        _("Location"),
        _("Supplier's Reference"),
        _("Order Date") => array('name'=>'ord_date', 'type'=>'date', 'ord'=>'desc'),
        _("Price") => array('align'=>'center'),
        _("Total") => 'amount',
        array('insert'=>true, 'fun'=>'edit_link'),
        array('insert'=>true, 'fun'=>'prt_link'),
);

if (get_post('StockLocation') != ALL_TEXT) {
    $cols[_("Location")] = 'skip';
}