sql between and 查询

public function updateAvweek()
{
$this->dao->update(TABLE_TASK)->set('avweek')->eq('1.333')->where('deadline')->between('2010-10-09','2010-10-16')
->andWhere('owner')->eq('renyiyong')
->andWhere('deleted')->eq('0')
->andWhere('status')->eq('done')->exec();
}能帮我看看我写这个方法符合禅道的语法规则吗？看禅道的DAO里面有between这个方法啊？不是这么用的吗？结果就是更新不了。如果将between 改成eq就能更新到数据库中望春哥指点一下？