begin train
begin
insert into A values(XX,XX,..)
update A set SS = SS where id = SS
end
commit train
begin train
begin
update A set SS = SS where id = SS
update A set XX = XX where id = XX
end
commit train
begin train
begin
insert into A values(XX,XX,..)
update A set SS = SS where id = SS
end
commit train
begin train
begin
update A set SS = SS where id = SS
update A set XX = XX where id = XX
end
commit train