理解innodb的锁(record,gap,Next-Key lock)

https://blog.csdn.net/cug_jiang126com/article/details/50596729 http://www.cnblogs.com/zhoujinyi/p/3435982.html https://tech.meituan.com/innodb-lock.html Record lock 单条索引记录上加锁，record lock锁住的永远是索引，而非记录本

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