今天例举2种常见的Mysql InnoDB下的行锁

现有表dr_test(id pk, name)

数据是

1 zhangsan
2 lisi
3 wangwu

例子1

事务1 update dr_test set name='zhaoliu' where id=1

事务2 update dr_test set name='zhaoliu1' where id=1

因为事务1对pk id =1的数据行加了行锁，事务2会阻塞

例子2

事务1 delete from dr_test where id=1

事务2 insert into dr_test(id,name) value (1,"zhaoliu");

因为事务1对pk id =1的数据行加了行锁，事务2会阻塞

Lock wait timeout exceeded; try restarting transaction