/**
* get the name of the field to order the table data by
* @return string column to order by tablename.elementname
*/
function getOrderByName()
{
$params = $this->getParams();
$join =& $this->getJoin();
$joinTable = $join->table_join_alias;
$joinVal = $this->_getValColumn();
$return = !strstr($joinVal, 'CONCAT') ? "{$joinTable}.{$joinVal}" : $joinVal;
if ($return == '.') {
$return = parent::getOrderByName();
}
return $return;
}