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TiDB 源码阅读系列文章（七）基于规则的优化

 6 years ago
source link: https://zhuanlan.zhihu.com/p/35511864?
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在 TiDB 里面，SQL 优化的过程可以分为逻辑优化和物理优化两个部分。逻辑优化主要是基于规则的优化，简称 RBO（rule based optimization）。物理优化会为逻辑查询计划中的算子选择某个具体的实现，需要用到一些统…

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