使用MySQL 5.7.24版本的安装文件替换MySQL 5.7.19版本的安装文件，数据库复制频繁中断，查看error日志发现下面错误：
[Warning] InnoDB: Table mysql/innodb_index_stats has length mismatch in the column name table_name. Please run mysql_upgrade
解决办法：
在MySQL服务正常运行的状态下，使用mysql_upgrade命令进行处理：
mysql_upgrade --host=‘127.0.0.1‘ --port=3358 --user=‘root‘ --password="password"
执行结果：
mysql_upgrade: [Warning] Using a password on the command line interface can be insecure. Checking if update is needed. Checking server version. Running queries to upgrade MySQL server. Checking system database. mysql.columns_priv OK report.ts_wcs_task_worker OK report.ts_without_plan_container OK report.ts_without_plan_picking OK report.ts_without_plan_putaway OK report.wms_restingorder_data OK sys.sys_config OK workflow_test.workflow_t1 OK Upgrade process completed successfully. Checking if update is needed.
MySQL Error--InnoDB Table mysqlinnodb_index_stats has length mismatch in the column
原文：https://www.cnblogs.com/gaogao67/p/11715700.html