protected function _renderForupdate($sql)
    {
        if ($this->_parts[self::FOR_UPDATE]) {
            $sql .= ' ' . self::SQL_FOR_UPDATE;
        }

        return $sql;
    }
protected function _renderForupdate($sql)
    {
        if ($this->_parts[self::FOR_UPDATE]) {
            $sql .= ' ' . self::SQL_FOR_UPDATE;
        }

        return $sql;
    }
protected function _renderForupdate ( $ sql ) { if ( $ this -> _parts [ self :: FOR_UPDATE ] ) { $ sql .= ' ' . self :: SQL_FOR_UPDATE ; } return $ sql ; }
Render FOR UPDATE clause

@param string   $sql SQL query
@return string
Render FOR UPDATE clause