connection node_2;
connection node_1;
create table p (i varchar(100) primary key, j int) ENGINE=InnoDB DEFAULT CHARSET=utf8;
create table c1 (i int primary key auto_increment, j varchar(100), k int,  key(j), constraint fk1 foreign key (j) references p(i)) ENGINE=InnoDB DEFAULT CHARSET=utf8;
create table c2 (i int primary key auto_increment, j varchar(100), k int,  key(j), constraint fk2 foreign key (j) references p(i)) ENGINE=InnoDB DEFAULT CHARSET=utf8;
insert into p values('sippo',1);
insert into c1 values(1,'sippo',1);
insert into c2 values(1,'sippo',1);
update c1 set k = 100 where j = 'sippo';
insert into c1 values(2,'sippo',1);
select * from p;
i	j
sippo	1
select * from c1;
i	j	k
1	sippo	100
2	sippo	1
select * from c2;
i	j	k
1	sippo	1
connection node_2;
select * from p;
i	j
sippo	1
select * from c1;
i	j	k
1	sippo	100
2	sippo	1
select * from c2;
i	j	k
1	sippo	1
connection node_1;
drop table c1;
drop table c2;
drop table p;