目录准备工作开始测试1. 最左匹配原则2. 覆盖索引3. 索引跳跃扫描总结最近在深入学习mysql，在学习最左匹配原则的时候，遇到了一个有意思的事情。请听我细细道来。
So, say I have a string to parse with a given format that maps to a tree like data structure. The string is kinda similar to a folder path, and the structure is similar to a file structure, except its
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