slave stop;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
reset master;
reset slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
slave start;
create table t1(n int);
insert into t1 values(get_lock("lock",2));
select get_lock("lock",2);
get_lock("lock",2)
1
select release_lock("lock");
release_lock("lock")
1
select get_lock("lock",3);
get_lock("lock",3)
1
select * from t1;
n
1
select is_free_lock("lock");
is_free_lock("lock")
0
select is_free_lock("lock2");
is_free_lock("lock2")
1
select is_free_lock(NULL);
is_free_lock(NULL)
NULL
drop table t1;