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SET DEFAULT_STORAGE_ENGINE='tokudb';
drop table if exists t;
create table t (a int primary key, b int);
insert into t values (1,0);
set session transaction isolation level serializable;
begin;
select * from t where a=1 for update;
a b
1 0
update t set b=b+1 where a=1;
set session transaction isolation level serializable;
begin;
select * from t where a=1 for update;
commit;
a b
1 1
update t set b=b+1 where a=1;
select * from t;
a b
1 2
commit;
drop table t;
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