Réduire durée d'exécution requête SQL Prestashop

Bonjour,

Je vous contacte car j'ai vu que vous avez déjà réalisé des optimisations de requête SQL pour Prestashop.

Mon problème est le suivant :

- sur ma boutique active, sur Prestashop 1.4.7.0, l'affichage de la page Meilleures ventes (par le lien situé dans le footer) est quasi instantané.
- sur ma boutique d'essai de mise à jour vers 1.5.6.2, l'affichage de la même page requiert 25 secondes.

C'est la requête SQL suivante qui est en cause (Cette requête se trouve dans le fichier /classes/ProductSale.php) :
//Main query
$sql = 'SELECT p.*, product_shop.*, stock.out_of_stock, IFNULL(stock.quantity, 0) as quantity,
pl.`description`, pl.`description_short`, pl.`link_rewrite`, pl.`meta_description`,
pl.`meta_keywords`, pl.`meta_title`, pl.`name`,
m.`name` AS manufacturer_name, p.`id_manufacturer` as id_manufacturer,
MAX(image_shop.`id_image`) id_image, il.`legend`,
ps.`quantity` AS sales, t.`rate`, pl.`meta_keywords`, pl.`meta_title`, pl.`meta_description`,
DATEDIFF(p.`date_add`, DATE_SUB(NOW(),
INTERVAL '.$interval.' DAY)) > 0 AS new
FROM `'._DB_PREFIX_.'product_sale` ps
LEFT JOIN `'._DB_PREFIX_.'product` p ON ps.`id_product` = p.`id_product`
'.Shop::addSqlAssociation('product', 'p', false).'
LEFT JOIN `'._DB_PREFIX_.'product_lang` pl
ON p.`id_product` = pl.`id_product`
AND pl.`id_lang` = '.(int)$id_lang.Shop::addSqlRestrictionOnLang('pl').'
LEFT JOIN `'._DB_PREFIX_.'image` i ON (i.`id_product` = p.`id_product`)'.
Shop::addSqlAssociation('image', 'i', false, 'image_shop.cover=1').'
LEFT JOIN `'._DB_PREFIX_.'image_lang` il ON (i.`id_image` = il.`id_image` AND il.`id_lang` = '.(int)$id_lang.')
LEFT JOIN `'._DB_PREFIX_.'manufacturer` m ON (m.`id_manufacturer` = p.`id_manufacturer`)
LEFT JOIN `'._DB_PREFIX_.'tax_rule` tr ON (product_shop.`id_tax_rules_group` = tr.`id_tax_rules_group`)
AND tr.`id_country` = '.(int)Context::getContext()->country->id.'
AND tr.`id_state` = 0
LEFT JOIN `'._DB_PREFIX_.'tax` t ON (t.`id_tax` = tr.`id_tax`)
'.Product::sqlStock('p').'
WHERE product_shop.`active` = 1
AND p.`visibility` != \'none\'
AND p.`id_product` IN ('.$ids.')
GROUP BY product_shop.id_product
ORDER BY '.(!empty($order_table) ? '`'.pSQL($order_table).'`.' : '').'`'.pSQL($order_by).'` '.pSQL($order_way).'
LIMIT '.(int)($page_number * $nb_products).', '.(int)$nb_products;

$result = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($sql);

if ($final_order_by == 'price')
Tools::orderbyPrice($result, $order_way);
if (!$result)
return false;
return Product::getProductsProperties($id_lang, $result);
}

Pour nfo, sur Prestashop 1.4.7.0, la requête (d'exécution rapide) était la suivante :

$result = Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS('
SELECT p.*,
pl.`description`, pl.`description_short`, pl.`link_rewrite`, pl.`meta_description`, pl.`meta_keywords`, pl.`meta_title`, pl.`name`, m.`name` AS manufacturer_name, p.`id_manufacturer` as id_manufacturer,
i.`id_image`, il.`legend`,
ps.`quantity` AS sales, t.`rate`, pl.`meta_keywords`, pl.`meta_title`, pl.`meta_description`,
DATEDIFF(p.`date_add`, DATE_SUB(NOW(), INTERVAL '.(Validate::isUnsignedInt(Configuration::get('PS_NB_DAYS_NEW_PRODUCT')) ? Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20).' DAY)) > 0 AS new
FROM `'._DB_PREFIX_.'product_sale` ps
LEFT JOIN `'._DB_PREFIX_.'product` p ON ps.`id_product` = p.`id_product`
LEFT JOIN `'._DB_PREFIX_.'product_lang` pl ON (p.`id_product` = pl.`id_product` AND pl.`id_lang` = '.(int)($id_lang).')
LEFT JOIN `'._DB_PREFIX_.'image` i ON (i.`id_product` = p.`id_product` AND i.`cover` = 1)
LEFT JOIN `'._DB_PREFIX_.'image_lang` il ON (i.`id_image` = il.`id_image` AND il.`id_lang` = '.(int)($id_lang).')
LEFT JOIN `'._DB_PREFIX_.'manufacturer` m ON (m.`id_manufacturer` = p.`id_manufacturer`)
LEFT JOIN `'._DB_PREFIX_.'tax_rule` tr ON (p.`id_tax_rules_group` = tr.`id_tax_rules_group`
AND tr.`id_country` = '.(int)Country::getDefaultCountryId().'
AND tr.`id_state` = 0)
LEFT JOIN `'._DB_PREFIX_.'tax` t ON (t.`id_tax` = tr.`id_tax`)
WHERE p.`active` = 1
AND p.`id_product` IN (
SELECT cp.`id_product`
FROM `'._DB_PREFIX_.'category_group` cg
LEFT JOIN `'._DB_PREFIX_.'category_product` cp ON (cp.`id_category` = cg.`id_category`)
WHERE cg.`id_group` '.$sqlGroups.'
)
ORDER BY '.(isset($orderByPrefix) ? $orderByPrefix.'.' : '').'`'.pSQL($orderBy).'` '.pSQL($orderWay).'
LIMIT '.(int)($pageNumber * $nbProducts).', '.(int)($nbProducts));

if ($orderBy == 'price')
Tools::orderbyPrice($result,$orderWay);
if (!$result)
return false;
return Product::getProductsProperties($id_lang, $result);
}

Sauriez vous comment réduire le temps d'affichage de cette page ?

Merci par avance.

Cordialement,

Patrick