/**
  * RepresentaĆ§Ć£o textual do comando.
  *
  * @return string
  * */
 public function render()
 {
     $column = current(preg_split('/\\s*AS\\s*/', $this->_column->render()));
     return sprintf('%s %s %s', $column, $this::T_COMMAND, $this->converteValue($this->_value));
 }