问题一:ERROR 1193 (HY000)
set global validate_password_XXX=XXX;
ERROR 1193 (HY000): Unknown system variable 'validate_password_XXX'
解决方案:中间变成点号,如set global validate_password.length
问题二:ERROR 1064 (42000)
SET PASSWORD = PASSWORD('xxxx');
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'PASSWORD('xxxx')' at line 1
解决方案:使用SET PASSWORD ='xxxx';更建议用ALTER USER USER() IDENTIFIED BY 'XXXX';
具体可能从随着版本更新可能会有更多的变化,可参考
1.早期版本(关于validate_password plugin)
https://dev.mysql.com/doc/refman/5.7/en/validate-password.html
https://dev.mysql.com/doc/refman/5.7/en/set-password.html
2.80版本(关于validate_password component)
https://dev.mysql.com/doc/refman/8.0/en/validate-password.html
https://dev.mysql.com/doc/refman/8.0/en/validate-password-options-variables.html