Transferring “Money” between accountID in MySQL

Question

I have a question which I have tried to Google but haven\'t find an answer to yet. What I am trying to do is transferring money between two accounts in MySQL with a stored proce

Answer 1

Added a check for the amount at the beginning of the procedure, and moved insert into transfers before update statements. There are foreign keys in transfers table referencing account table, so if you try to insert id that does not exist it will fail immediately.

delimiter //
create procedure transfer (amount int, note varchar(50), sending_account 
int, receiving_account int)
this_proc:begin 

start transaction;

if amount <= 0 then
    leave this_proc;
end if;

insert into Transfers values 
(TransfersID, amount, sending_account, receiving_account, note, now());

update Account as A
set A.amount = A.amount - amount
where A.AccountID = sending_account;

update Account as A
set A.amount = A.amount + amount
where A.AccountID = receiving_account;

commit work;

end //
delimiter ;