Before you submit an issue, please be sure to search through existing issues as well as search through the documentation

• [] I've searched all existing issues
  我现在遇到一个问题，主库需要添加一个字段,但是表数据比较庞大，需要几分钟添加，那就意味着主库如果添加久，从库同步的时候也会久，这个时候如果有地方根据新字段做查询就会报错
• [] I've read all relevant documentation I could find
  我现在希望有个比较好的方案处理这个问题，或者我能否在某个接口停用从库，或者停用某个model不走从库

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