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执行一条sql语句都经历了什么？

 6 years ago
source link: https://juejin.im/post/5c492ba8f265da6144205e1e
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每天都在跟 mysql 打交道，你知道执行一条简单的 select 语句，都经历了哪些过程吗？ 首先，mysql 主要是由 server 层和存储层两部分构成的。server 层主要包括连接器、查询缓存，分析器、优化器、执行器。存储层主要是用来存储和查询数据的

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