--- In firebird-support@yahoogroups.com, Dmitry Yemanov <dimitr@...>
wrote:

>> update t1 set a = a+b, b = a-b, a = a-b;
>
> This won't work in the next FB version, so I wouldn't rely on this
> approach.

Good to know.

Can we rely on in on FB 1.x versions?

</M>