Display date_delivery_expected on product.tpl Prestashop 1.6

Hello everybody! Have a nice day! Display date_delivery_expected value (from ps_supply_order_detail sql table), using [login to view URL] file I want to inform my clients when the out of stock product will be available. So, in the backend I made an supplier order (back end) and I have a date_delivery_expected. After that when I change the supply_order in "waiting for the order" I want to display this date_delivery_expected on the frontend product description something like that in [login to view URL]: <p id="availability_date"{if ($product->quantity > 0) || !$product->available_for_order || $PS_CATALOG_MODE || !isset($product->available_date) || $product->available_date < $[login to view URL]|date_format:'%Y-%m-%d'} style="display: none;"{/if}> <span id="availability_date_label">{l s='Availability date:'}</span> <span style="font-weight: bold; color: #000000;" id="availability_date_value">{dateFormat date="""ps_supply_order_detail sql->date_delivery_expected""" full=false}</span> </p> Somebody can help me? Best regards Marius