When checking system records today，See MariaDB has a lot of error messages，Follows：
InnoDB: Table mysql/innodb_index_stats has length mismatch in the column name table_name. Please run mysql_upgrade
Internet search after，Mainly because after a certain DB update，The length of the field has been adjusted，And the adjustment method is as the event record says，Just execute the mysql_upgrade command。
◎ Run Command Prompt of MariaDB，And enter the following command：
mysql_upgrade -u root -p
◎ After running，Just restart the SQL service。
If the above actions are performed，Still didn't solve the problem，Please backup the database，Remove and reinstall。
【參考連結】
- errors – Table mysql/innodb_index_stats has length mismatch in the column name table_name. Please run mysql_upgrade – Database Administrators Stack Exchange
- Under MySQL5.7.25, the error message innodb_table_stats is reported-Where is my second dog-51CTO blog
