MySQL一致性读,又称为快照读。使用的是MVCC机制读取undo中的已经提交的数据。所以它的读取是非阻塞的。 相关文档:http://dev.mysql.com/doc/refman/5.6/en/innodb-consistent-read.html A consistent read means that InnoDB uses multi-versioning to …
参考:如何在shell脚本中使用goto语句 - VoidCC
效果: 注意修改以下几处: show you my code:
#!/usr/bin/env bash # Define the choices to present to the user, which will be
# presented line by line, prefixed by a sequential numb…