// If the asset identifier is numeric assume it is a primary key, else lookup by name.
        if (is_numeric($asset))
        {
            $query->where('(a.id = ' . (int) $asset . ($recursive ? ' OR a.parent_id=0' : '') . ')');
        }
        else
        {
            $query->where('(a.name = ' . $db->quote($asset) . ($recursive ? ' OR a.parent_id=0' : '') . ')');
        }

        // If the asset identifier is numeric assume it is a primary key, else lookup by name.
        if (is_numeric($asset))
        {
            $query->where('(a.id = ' . (int) $asset . ')');
        }
        else
        {
            $query->where('(a.name = ' . $db->quote($asset) . ')');
        }