> I appologize asking the same thing again and again, but I would
> like to make sure that I understand database transactions well.
>
> I hope I am doing exactly the same operations in isql as in Java,
> but results are different. Why?
>
> In the Java example if two transaction performs separately, the
> result is different than if they run in parallel. As I know the
> transaction should avoid such differences.

Seems that I was wrong - second trancation should fail... I will
check if that's a bug in JayBird or not. Interesting is that JayBird
1.0.x works the same. Either there's something I do not understand
with transactions in Firebird too, or its a bug somewhere.

I will check this more.

Roman