create table t (a int primary key, b int) engine=tokudb;
insert into t values (1,0);
set session transaction isolation level read committed;
begin;
select * from t where a=1 for update;
a	b
1	0
update t set b=b+1 where a=1;
set session tokudb_lock_timeout=60000;
set session transaction isolation level read committed;
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;
