--source include/not_embedded.inc
--source include/have_innodb.inc
#--source include/have_metadata_lock_info.inc

#
# Testing of problems with ALTER TABLE and events on the same table(s)
#

#
# MDEV-24452 ALTER TABLE event take infinite time which for example breaks
#            mysql_upgrade
#

SET GLOBAL event_scheduler=1;

CREATE TABLE t1 (a int primary key, b int) engine=innodb;
insert into t1 values (1,1),(2,2),(3,3);
CREATE TABLE t2 (a int primary key) engine=innodb;

CREATE EVENT e_t1 ON SCHEDULE EVERY 1 SECOND DO insert ignore into test.t2 select a from test.t1;

let $wait_condition=SELECT count(*) > 0 from t2;
--source include/wait_condition.inc
select * from t2;
drop event e_t1;

# select * from information_schema.metadata_lock_info;
ALTER TABLE mysql.event DROP PRIMARY KEY, ADD PRIMARY KEY(db,name);
drop table t1,t2;

SET GLOBAL event_scheduler=default;