/**
  * Builds a new Date Day Sql Export Policy with the given record and the
  * name of the field that is the DATE field.
  *
  * @param IExportFormat $format
  * @param CActiveRecord $record
  * @param string $dateFieldName
  */
 public function __construct(IExportFormat $format, CActiveRecord $record, $dateFieldName)
 {
     parent::__construct($format, $record);
     $this->_dateFieldName = $dateFieldName;
 }