#
# MDEV-18788 Live upgrade from MySQL 5.6/5.7 to MariaDB 10.4 fails with "Event Scheduler: An error occurred when initializing system tables"
#
create table t1 (a int);
alter table mysql.column_stats rename to mysql.column_stats1;
flush tables;
alter table t1 change a b varchar(100);
show create table t1;
alter table mysql.column_stats1 rename to mysql.column_stats;
drop table t1;