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--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;