mysql 异常处理

Posted 2023-03-02 fanwenhu

临时对策:

mysql  日期默认设置为 0000-00-00 00:00:00 报错处理方法:

主要原因是开启了严谨模式,关闭即可

mysql取消严格模式

SET GLOBAL sql_mode = 'ONLY_FULL_GROUP_BY,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

SET SESSION sql_mode = 'ONLY_FULL_GROUP_BY,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

mysql恢复严格模式

SET GLOBAL sql_mode = ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION;

SET SESSION sql_mode = ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION;

运行sql文件出现:

MySQL server has gone away错误怎么办

工具  服务器监控    mysql    选择出错的连接名称  点击变量   max_allowed_packet 调整到最大

修改最大连接数

查询:

show variables like '%max_connections%';

修改:

set GLOBAL max_connections=1000;
 

永久对策:

修改my.ini文件

[mysqld]
character-set-server=utf8
sql-mode="NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
max_connections=200
max_allowed_packet=1024M