// Added a more efficient index

install-dev/data/db_structure.sql

@@ -1437,7 +1437,7 @@ CREATE TABLE IF NOT EXISTS `PREFIX_product_shop` (
   `date_upd` datetime NOT NULL,
   PRIMARY KEY (`id_product`, `id_shop`),
   KEY `id_category_default` (`id_category_default`),
-  KEY `date_add` (`date_add`)
+  KEY `date_add` (`date_add` , `active` , `visibility`)
 ) ENGINE=ENGINE_TYPE  DEFAULT CHARSET=utf8;
 
 CREATE TABLE `PREFIX_product_attribute` (

install-dev/upgrade/sql/1.5.5.0.sql

@@ -26,3 +26,5 @@ SET @id_parent = (SELECT IFNULL(id_tab, 1) FROM `PREFIX_tab` WHERE `class_name`
 UPDATE `PREFIX_tab` SET id_parent = @id_parent WHERE `id_parent` = 1 AND `class_name` = 'AdminMarketing' LIMIT 1;
 
 UPDATE `PREFIX_hook` SET `description` = 'This hook is called when a new credit slip is added regarding client order' WHERE `name` = 'actionOrderSlipAdd';
+
+ALTER TABLE `PREFIX_product_shop` DROP INDEX `date_add`, ADD INDEX `date_add` (`date_add` , `active` , `visibility`);