mysql -uroot

Welcome to the MariaDB monitor.  Commands end with ; or \g.

Your MariaDB connection id is 8

Server version: 10.3.15-MariaDB MariaDB Server

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MariaDB [(none)]> use information_schema

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

MariaDB [information_schema]> select column_name from columns;

ERROR 2006 (HY000): MySQL server has gone away

No connection. Trying to reconnect...

Connection id:    8

Current database: information_schema

ERROR 2006 (HY000): MySQL server has gone away

No connection. Trying to reconnect...

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

ERROR: Can't connect to the server

unknown [information_schema]>