protected function _getLastRecordTime()
{
$adapter = $this->_getWriteAdapter();
$select = $this->_select($this->_reportTable, null, 'MAX(`goal_time`)');
if ($this->_tracker) {
$select->where('`tracker_id` = ?', $this->_tracker->getId());
}
if ($this->_campaign) {
$select->where('`campaign_id` = ?', $this->_campaign->getId());
}
return $adapter->fetchOne($select);
}
