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; stop slave; DROP DATABASE IF EXISTS federated; CREATE DATABASE federated; DROP DATABASE IF EXISTS federated; CREATE DATABASE federated; create table federated.t1 (a int primary key, b varchar(64)) engine=myisam; create table federated.t1 (a int primary key, b varchar(64)) engine=federated connection='mysql://root@127.0.0.1:SLAVE_PORT/federated/t1'; insert into federated.t1 values (1,"Larry"), (2,"Curly"), (1,"Moe"); ERROR 23000: Can't write; duplicate key in table 't1' select * from federated.t1; a b 1 Larry 2 Curly truncate federated.t1; alter table federated.t1 engine=innodb; insert into federated.t1 values (1,"Larry"), (2,"Curly"), (1,"Moe"); ERROR 23000: Can't write; duplicate key in table 't1' select * from federated.t1; a b drop table federated.t1; drop table federated.t1; DROP TABLE IF EXISTS federated.t1; DROP DATABASE IF EXISTS federated; DROP TABLE IF EXISTS federated.t1; DROP DATABASE IF EXISTS federated;