drop table if exists t1,t2;
create table t1 (id int, sometext varchar(100)) engine=myisam;
insert into t1 values (1, "hello"),(2, "hello2"),(4, "hello3"),(4, "hello4");
create table t2 like t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t1;
select count(*) from t1;
count(*)
131072
alter table t1 add index (id), add index(sometext), add index(sometext,id);
alter table t1 disable keys;
alter table t1 enable keys;
drop table t1,t2;