public function update($data, Criteria $where, $limit = false)
{
if (empty($data)) {
throw new Exception("Can't insert an empty row");
}
return $this->_connection->execute(sprintf('UPDATE %s SET %s WHERE %s%s', $this->_name->quoted(), $this->_buildSet($data), $where, $limit ? ' LIMIT ' . intval($limit) : ''), array_values($data));
}