Comment 240 for bug 883459

(In reply to linuxfan from comment #220)
> for ages there has been an error message in my mysql/mariadb log-file:
>
> [ERROR] Incorrect definition of table mysql.event: expected column
> 'sql_mode' at position 14 to have type set ...

Thanks for sharing.
In which log file exactly did you find this error ?

/var/log/mysql/ is empty here, so

pgrep -af mysqld
/usr/sbin/mysqld --defaults-file=/home/ederag/.local/share/akonadi/mysql.conf --datadir=/home/ederag/.local/share/akonadi/db_data/ --socket=/tmp/akonadi-ederag.Yqlbg1/mysql.socket --pid-file=/tmp/akonadi-ederag.Yqlbg1/mysql.pid

grep -1 "error log" /home/ederag/.local/share/akonadi/mysql.conf

# # error log file name, relative to datadir (default:hostname.err)
log_error=mysql.err

grep -i error /home/ederag/.local/share/akonadi/db_data/mysql.err
<nothing>

That was with the "1 s" delay filter active,
just deactivated; we'll see.