public function addPrimaryKey($table, $columnNames)
    {
        $table = $this->prefixTable($table);
        if (!is_array($columnNames)) {
            $columnNames = array($columnNames);
        }

        return $this->container->make('Piwik\Updater\Migration\Db\AddPrimaryKey', array(
            'table' => $table, 'columnNames' => $columnNames
        ));
    }