$this->_select = '
a.id_order AS id_pdf,
CONCAT(LEFT(c.`firstname`, 1), \'. \', c.`lastname`) AS `customer`,
osl.`name` AS `osname`,
os.`color`,
IF((SELECT COUNT(so.id_order) FROM `'._DB_PREFIX_.'orders` so WHERE so.id_customer = a.id_customer) > 1, 0, 1) as new,
(SELECT COUNT(od.`id_order`) FROM `'._DB_PREFIX_.'order_detail` od WHERE od.`id_order` = a.`id_order` GROUP BY `id_order`) AS product_number';
$this->_join = 'LEFT JOIN `'._DB_PREFIX_.'customer` c ON (c.`id_customer` = a.`id_customer`)
LEFT JOIN `'._DB_PREFIX_.'order_history` oh ON (oh.`id_order` = a.`id_order`)
LEFT JOIN `'._DB_PREFIX_.'order_state` os ON (os.`id_order_state` = oh.`id_order_state`)
LEFT JOIN `'._DB_PREFIX_.'order_state_lang` osl ON (os.`id_order_state` = osl.`id_order_state` AND osl.`id_lang` = '.(int)($cookie->id_lang).');

$this->_where = 'AND oh.`id_order_history` = (SELECT MAX(`id_order_history`) FROM `'._DB_PREFIX_.'order_history` moh WHERE moh.`id_order` = a.`id_order`
--------------------------
AND c.customer = '$customer_name'

--------------------------
GROUP BY moh.`id_order`)';




OVVIAMENTE: $customer_name contiene il nome del cliente