public function changeSortType($field, $type)
{
$type = trim($type);
switch (strtoupper($type)) {
case 'TVDATETIME':
$field = "STR_TO_DATE(" . $field . ",'%d-%m-%Y %H:%i:%s')";
break;
default:
$field = parent::changeSortType($field, $type);
}
return $field;
}
