Re: - Mailing list pgsql-jdbc

On Tue, 2002-11-05 at 15:25, Dave Cramer wrote:
> Unfortunately, until the backend gives us usefull error codes, there's
> not much we can do about catching exceptions intelligently.

Well, at least in this particular situation, the backed raises a NOTICE
"current transaction is aborted, queries ignored until end of
transaction block". Maybe the driver can use this notice to give a more
meaningful exception message?

> And yes, the behaviour is intended, once a transaction has failed, you
> need to end, or roll it back

I just read Csaba's reply to my previous post, and now I have a better
understanding of this. We can't do much about it if the backend doesn't
support savepoints, right?

> Dave
> On Tue, 2002-11-05 at 12:19, Karl Goldstein wrote:
> > I don't have a strong opinion either way.  For me, the main problem with the current behavior is
> > simply that the error message is confusing.  If it is indeed the case that any SQLException
> > invalidates the current transaction (and my impression is that this is not intended), then the
> > driver should report that directly and not even let you try to execute later statements.  The "No
> > results were returned by the query" error just left me scratching my head.
> >
> > Thanks,
> >
> > Karl
> >
> > --- Daniel Serodio <daniel@checkforte.com.br> wrote:
> > > I've never worked with Oracle, just MySQL and PostgreSQL, but isn't this
> > > the definition of a transaction?
> > >
> > > "A transaction is an atomic unit of processing; it is eigher performed
> > > in its entirety or not at all"
> > >
> > > My understanding of this is that if one statement failed, all of the
> > > following statements should fail.
> > >
> > > On Tue, 2002-11-05 at 14:31, Csaba Nagy wrote:
> > > > Hi all,
> > > >
> > > > I was wondering if there's any chance of this behavior to change in the
> > > > future ?
> > > > I mean will it be possible to continue a transaction after one of the SQLs
> > > > failed, by only rolling back what that query did ?
> > > > In many real life applications recovery is very possible after a failed
> > > > query, and (the not failed part of) the transaction should be committed.
> > > > This is one of the big differences in behavior between Postgres and Oracle,
> > > > making life hard for porting...
> > > >
> > > > Cheers,
> > > > Csaba.
> >
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> --
> Dave Cramer <Dave@micro-automation.net>
>
>
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[]'s
Daniel Serodio