stop slave;
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;
start slave;
reset master;
create table t1(n int);
insert into t1 values (@a), (@b);
select * from t1;
n
NULL
NULL
select * from t1;
n
1
2
set global init_connect="set @c=1";
show variables like 'init_connect';
Variable_name	Value
init_connect	set @c=1
drop table t1;
stop slave;