/**
* 予約ブース数の総数を取得
*
* @access public
* @param int
* @return bool
* @author kobayasi
*/
public function sumReservedBooth($db = 'slave')
{
$query = \DB::select(DB::expr('SUM(reserved_booth) as sum_result'));
$query->from(\Model_Entry::table());
$query->where(array('fleamarket_id' => $this->fleamarket_id, 'fleamarket_entry_style_id' => $this->fleamarket_entry_style_id, 'entry_status' => \Model_Entry::ENTRY_STATUS_RESERVED));
$result = $query->execute($db)->get('sum_result');
return $result;
}