On Wednesday 11 September 2002 04:58 am, Stephan Szabo wrote:
> On Wed, 11 Sep 2002, snpe wrote:
> > On Wednesday 11 September 2002 02:09 am, Stephan Szabo wrote:
> > > On Wed, 11 Sep 2002, snpe wrote:
> > > > yes, we're going around in circles.
> > > >
> > > > Ok.I agreed (I think because Oracle do different)
> > > > Transaction start
> > > > I type invalid command
> > > > I correct command
> > > > I get error
> > > >
> > > > Why.If is it transactin, why I get error
> > > > I want continue.
> > > > I am see this error with JDeveloper (work with Oracle, DB2 an SQL
> > > > Server)
> > >
> > > Right, that's a separate issue (I alluded to it earlier, but wasn't
> > > sure that's what you were interested in). PostgreSQL treats all errors
> > > as unrecoverable. It may be a little loose about immediately rolling
> > > back due to the fact that historically autocommit was on and it seemed
> > > better to not go into autocommit mode after the error.
> > >
> > > I doubt that 7.3 is going to change that behavior, but a case might be
> > > made that when autocommit is off the error immediately causes a
> > > rollback and new transaction will start upon the next statement (that
> > > would normally start a transaction).
> >
> > 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 ?