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Mysql——》MyISAM存储引擎的索引
2022-07-01 21:45:00 【小仙。】
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总结——》【Java】
总结——》【Mysql】
总结——》【Spring】
总结——》【SpringBoot】
Mysql——》MyISAM存储引擎的索引
一、文件
frm:表结构文件
MYI:index,索引文件,存放索引
MYD:data,数据文件,存放数据记录
索引和数据是两个独立的文件。
二、怎么根据索引找到数据?
MyISAM 的 B+Tree 里面,叶子节点存储的是数据文件对应的磁盘地址。
所以从索引文件.MYI 中找 到键值后,会到数据文件.MYD 中获取相应的数据记录。
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