connect  con1,localhost,root,,;
connect  con2,localhost,root,,;
drop table if exists t1,t2;
connection con1;
create table t1 (id integer, x integer) engine = InnoDB;
insert into t1 values(0, 0);
set autocommit=0;
SELECT * from t1 where id = 0 FOR UPDATE;
id	x
0	0
connection con2;
set autocommit=0;
update t1 set x=2 where id = 0;
connection con1;
update t1 set x=1 where id = 0;
select * from t1;
id	x
0	1
commit;
connection con2;
commit;
connection con1;
select * from t1;
id	x
0	2
commit;
drop table t1;
connection con1;
create table t1 (id integer, x integer) engine = InnoDB;
create table t2 (b integer, a integer) engine = InnoDB;
insert into t1 values(0, 0), (300, 300);
insert into t2 values(0, 10), (1, 20), (2, 30);
commit;
set autocommit=0;
select * from t2;
b	a
0	10
1	20
2	30
update t2 set a=100 where b=(SELECT x from t1 where id = b FOR UPDATE);
select * from t2;
b	a
0	100
1	20
2	30
select * from t1;
id	x
0	0
300	300
connection con2;
set autocommit=0;
update t1 set x=2 where id = 0;
connection con1;
update t1 set x=1 where id = 0;
select * from t1;
id	x
0	1
300	300
commit;
connection con2;
commit;
connection con1;
select * from t1;
id	x
0	2
300	300
commit;
drop table t1, t2;
create table t1 (id integer, x integer) engine = InnoDB;
create table t2 (b integer, a integer) engine = InnoDB;
insert into t1 values(0, 0), (300, 300);
insert into t2 values(0, 0), (1, 20), (2, 30);
commit;
connection con1;
select a,b from t2 UNION (SELECT id, x from t1 FOR UPDATE);
a	b
0	0
20	1
30	2
300	300
select * from t2;
b	a
0	0
1	20
2	30
select * from t1;
id	x
0	0
300	300
connection con2;
update t2 set a=2 where b = 0;
select * from t2;
b	a
0	2
1	20
2	30
update t1 set x=2 where id = 0;
connection con1;
update t1 set x=1 where id = 0;
select * from t1;
id	x
0	1
300	300
commit;
connection con2;
commit;
connection con1;
select * from t1;
id	x
0	2
300	300
commit;
connection default;
disconnect con1;
disconnect con2;
drop table t1, t2;
End of 4.1 tests
set storage_engine=innodb;
drop table if exists a;
drop table if exists A;
create table A (c int);
insert into A (c) values (0);
create table a as select * from A;
drop table A;
drop table if exists a;
set storage_engine=default;
End of 5.0 tests.