Merge pull request #299 from samy-r/dev-import-time

Import time improvment

classes/Feature.php

@@ -313,19 +313,14 @@ class FeatureCore extends ObjectModel
 	public static function cleanPositions()
 	{
 		$return = true;
-
 		$sql = '
-		SELECT `id_feature`
-		FROM `'._DB_PREFIX_.'feature`
-		ORDER BY `position`';
-		$result = Db::getInstance()->executeS($sql);
-
-		$i = 0;
-		foreach ($result as $value)
-			$return = Db::getInstance()->execute('
-			UPDATE `'._DB_PREFIX_.'feature`
-			SET `position` = '.(int)$i++.'
-			WHERE `id_feature` = '.(int)$value['id_feature']);
+			UPDATE `'._DB_PREFIX_.'feature` f LEFT JOIN
+				(SELECT @i := @i +1 AS rank, id_feature, position 
+				FROM `'._DB_PREFIX_.'feature` JOIN (SELECT @i :=1) dummy
+				ORDER by position) AS f2
+				USING(id_feature)
+				SET f.position = f2.rank-1';
+		$return = Db::getInstance()->executeS($sql);
 		return $return;
 	}