Home Database Mysql Tutorial mysql: unknown variable 'character-set-client=utf8'_MySQL

mysql: unknown variable 'character-set-client=utf8'_MySQL

May 30, 2016 pm 05:10 PM

 

在同事安装的MySQL服务器上(居然安装的是My-SQL 5.1.73的老旧版本),登录MySQL时遇到下面“mysql: unknown variable 'character-set-client=utf8'”错误:

 

[root@MySQLDB002 lib]# mysql -u root -p

 

mysql: unknown variable 'character-set-client=utf8'

检查MySQL的配置文件/etc/my.cnf发现

[root@MySQLDB002 lib]# more /etc/my.cnf 

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

user=mysql

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

default-character-set=utf8

character-set-server=utf8

[client]

default-character-set=utf8

character-set-client=utf8

[mysql]

default-character-set=utf8

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid
Copy after login

 

 

网上有资料说这个是mysqlbinlog的一个bug,但是搜索外文资料并没有搜索到相关信息,虽然还是并没有彻底弄明白原因,但是不妨自己验证了一下下面几种解决方面

 

解决方法1:屏蔽character-set-client=utf8,此时连接MySQL语句没有问题。

mysql: unknown variable 'character-set-client=utf8'_MySQL

解决方法2:使用loose-default-character-set=utf8 loose-选项,loose为宽松的, 散漫的, 自由的意思,在选项前加了loose-,则当程序不认识此选项时会略过此选项,并给出一个警告。测试亦可解决问题。
mysql: unknown variable 'character-set-client=utf8'_MySQL


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