'fields' => array(
'user_name' => $this->creationSort ? 'MAX(user_name)' : 'user_name',
'user_id' => $this->creationSort ? 'user_id' : 'MAX(user_id)',
'fields' => array(
'user_name' => $this->creationSort ? 'MAX(user_name)' : 'user_name',
'user_id' => $this->creationSort ? 'user_id' : 'MAX(user_id)',