// uncommented sql query for upgrade (1.5.0.1),

[*] Installer : Upgrade script output now have also the version number which the query belongs to 
// fix in generate_root_category_from_multishop

install-new/upgrade/php/add_new_tab.php

@@ -25,7 +25,7 @@
 *  International Registered Trademark & Property of PrestaShop SA
 */
 
-function add_new_tab($className, $name, $id_parent)
+function add_new_tab($className, $name, $id_parent, $returnId = false)
 {
 	$array = array();
 	foreach (explode('|', $name) AS $item)
@@ -57,4 +57,10 @@ function add_new_tab($className, $name, $id_parent)
 								FROM `'._DB_PREFIX_.'tab`
 								WHERE `class_name` = \''.pSQL($className).'\' LIMIT 0,1
 								), 1, 1, 1, 1 FROM `'._DB_PREFIX_.'profile` )');
-}
+
+	if($returnId) {
+		return (int)Db::getInstance()->getValue('SELECT `id_tab`
+								FROM `'._DB_PREFIX_.'tab`
+								WHERE `class_name` = \''.pSQL($className).'\'');
+	}
+}

install-new/upgrade/php/generate_root_category_for_multishop.php

@@ -1,6 +1,6 @@
 <?php
 
-require_once('./generate_ntree.php');
+require_once('generate_ntree.php');
 
 function generate_root_category_for_multishop()
 {