On Wednesday 11 September 2002 02:38 pm, Rod Taylor wrote:
> > > > Why rollback.This is error (typing error).Nothing happen.
> > > > I think that we need clear set : what is start transaction ?
> > > > I think that transaction start with change data in database
> > > > (what don't change data this start not transaction.
> > >
> > > Another interesting case for a select is, what about
> > > select func(x) from table;
> > > Does func() have any side effects that might change data?
> > > At what point do we decide that the statement needs a
> > > transaction?
> >
> > Function in select list mustn't change any data.
> > What if function change data in from clause ?
>
> Why can't the function change data? I've done this one a number of
> times through views to log the user pulling out information from the
> system, and what it was at the time (time sensitive data).
Scenario :
Func change data in table in form clause
I fetch 3 (after row 1 and 2) and then change row 1
What result expect ?