Re: throw SQLException on no rs.next()? - Mailing list pgsql-jdbc

Hmm...

It looks like Sun's API specifies that it can only throw a SQLException, so
I guess this is correct.

It just seems a bit odd that a SQLException would occur when a database
error hasn't occurred. Am I correct in thinking that the interaction with
the database ends after the ResultSet is fetched, or does the .next()
actually move a cursor through a structure that lives on the database side?

(This is just a curiosity question, because I agree that if the spec says
SQLException, that's what you have to do.)

-Nick


> -----Original Message-----
> From: Dave Cramer [mailto:Dave@micro-automation.net]
> Sent: Tuesday, April 23, 2002 7:41 AM
> To: nickf@ontko.com
> Cc: AgentM; pgsql-jdbc@postgresql.org
> Subject: Re: [JDBC] throw SQLException on no rs.next()?
>
>
> Nick,
>
> I think it should throw a SQLException, since that is what most ppl are
> catching, I don't really think any driver should ever NPE as a result of
> misuse.
>
> Dave
> On Tue, 2002-04-23 at 08:29, Nick Fankhauser wrote:
> > Dave-
> >
> > My response was based on my experience when I started (about a
> year ago) so
> > this may be changed.
> >
> > However, at the time it looked to me like it *should* throw an
> NPE in this
> > situation, so I'm suprised that it would be a candidate for change.
> >
> > -Nick
> >
> > > -----Original Message-----
> > > From: Dave Cramer [mailto:Dave@micro-automation.net]
> > > Sent: Tuesday, April 23, 2002 7:23 AM
> > > To: nickf@ontko.com
> > > Cc: AgentM; pgsql-jdbc@postgresql.org
> > > Subject: Re: [JDBC] throw SQLException on no rs.next()?
> > >
> > >
> > > I thought I fixed it so that it doesn't throw an NPE, but I could be
> > > mistaken?
> > >
> > > Dave
> > > On Tue, 2002-04-23 at 08:09, Nick Fankhauser wrote:
> > > > Yes, it sure does. The way I usually handle stepping through a
> > > ResultSet is
> > > > with a structure like this:
> > > >
> > > > /* create REsultSet results */
> > > > while (results.next())
> > > > {
> > > >   /*do something with results*/
> > > > }
> > > >
> > > > You're right about this being a common newbie gotcha. I'll
> add it to the
> > > > newbie FAQ.
> > > >
> > > > -NF
> > > >
> > > >
> > > > > -----Original Message-----
> > > > > From: pgsql-jdbc-owner@postgresql.org
> > > > > [mailto:pgsql-jdbc-owner@postgresql.org]On Behalf Of AgentM
> > > > > Sent: Tuesday, April 23, 2002 12:36 AM
> > > > > To: pgsql-jdbc@postgresql.org
> > > > > Subject: [JDBC] throw SQLException on no rs.next()?
> > > > >
> > > > >
> > > > > Hi- it's me the JDBC newbie again and I have a simple
> request. Could
> > > > > a call to resultset.getX() throw some exception if
> rs.next() has not
> > > > > yet been called? I just got horribly burned by missing this simple
> > > > > thing and I think it may be helpful to other newbies to have this
> > > > > extra bit of information. Thanks.
> > > > > --
> > > > > ><><><><><><><><><><><><
> > > > > AgentM
> > > > > agentm@cmu.edu
> > > > >
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