Mysql 4.1 Windows 下升级问题

　　使用PHPMYADMIN时报错：

　　Client does not support authentication protocol requested

　　by server; consider upgrading MySQL client

　　官方的说法是

　　MySQL 4.1 and up uses an authentication protocol based on a password hashing algorithm that is incompatible with that used by older clients. .....

　　如果你升级mysql到4.1以上版本后遇到以上问题,请先确定你的mysql client 是4.1或者更高版本.(WINDOWS下有问题你就直接跳到下面看解决方法了,因为MYSQL 在WINDOWS是client和server一起装上了的)

　　请使用以下两种方法之一

　　其一:

　　mysql> SET PASSWORD FOR

　　-> 'some_user'@'some_host' = OLD_PASSWORD('newpwd');

　　其二:

　　mysql> UPDATE mysql.user SET Password = OLD_PASSWORD('newpwd')

　　-> WHERE Host = 'some_host' AND User = 'some_user';

　　mysql> FLUSH PRIVILEGES;

　　（出处：Viphot）