lock tables user read;//读锁定表
unlock tables;//解锁
lock tables user read local;//本地读锁定表，其他线程的insert未被阻塞，update操作被阻塞

lock tables user write;//写锁定表
unlock tables;//解锁

/**
* 当日单项内容状态
*/
public function getPointAready($marke,$dayTime){
  $model = SysRun::model()->findByAttributes(array('syr_marking'=>$marke,'syr_daytime'=>$dayTime));
  if(empty($model)){
    //表写锁定
    Yii::app()->db->createCommand()->setText("lock tables {{sys_run}} WRITE")->execute();
    $model = new SysRun();
    $model->syr_marking = $marke;
    $model->syr_daytime = $dayTime;
    $model->syr_val = 0;
    $model->syr_subval = 0;
    $model->save();
    //表解锁
    Yii::app()->db->createCommand()->setText("unlock tables")->execute();
  }
  return $model;
}