drop table if exists t1,t2,t3,t4;
create table t1(id int primary key, money1 int, when1 datetime default now());
insert into t1(id,money1) values(1,100);
insert into t1(id,money1) values(2,100);
select id,money1,when1 from t1;
id	money1	when1
1	100	searched
2	100	searched
id1 - 100  id2 + 100
begin;
update t1 set money1 = money1-100 where id = 1;
update t1 set money1 = money1+100 where id = 2;
commit;
select id,money1,when1 from t1;
id	money1	when1
1	0	searched
2	200	searched
select id,money1,when1 from t1;
id	money1	when1
1	0	searched
2	200	searched
drop table t1;
create table t1(id int primary key, money1 int, when1 datetime default now());
insert into t1(id,money1) values(1,100);
insert into t1(id,money1) values(2,100);
select id,money1,when1 from t1;
id	money1	when1
1	100	searched
2	100	searched
id1 - 100  id2 + 100
begin;
update t1 set money1 = money1-100 where id = 1;
update t1 set money1 = money1+100 where id = 2;
ERROR HY000: OceanBase server has gone away
commit;
ERROR HY000: OceanBase server has gone away
select id,money1,when1 from t1;
id	money1	when1
1	100	searched
2	100	searched
send failed
receive failed
drop table t1;