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;