RE: java code help...

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that was the answer i was looking for....
thanks...

> -----Original Message-----
> From: Richard Dettinger [SMTP:cujo@us.ibm.com]
> Sent: Friday, November 16, 2001 4:49 AM
> To:   java400-l@midrange.com
> Subject:      RE: java code help...
>
>
> You can't qualify column names.  Sorry its just not allowed.  The
> specification states that if a column name exists multiple times in a
> ResultSet that the column name applies to the first entry.
>
> You could write your SQL statement to give the columns unique names.
> That's the only work around available.
>
> BTW:  Your app will perform better if you use the column indexes instead
> of
> the column names.  Part of why using names instead of column indexes is so
> expensive is because you have to do a linear search of the names of the
> columns in the ResultSet for just this reason.  If your ResultSet has 100
> rows and you are fetching the 100th row with a column name, you could be
> spending an order of magnitude more time in the driver figuring out what
> the column index is over actually doing the work of getting the data.
>
> Sorry, dude... I'm a JDBC driver writer... I have to say those types of
> things to the application programmers.  :-)
>
> Richard D. Dettinger
> AS/400 Java Data Access Team
>
> Democracy's enemies have always underestimated the courage of the American
> people.
> It was true at Concord Bridge.  It was true at Pearl Harbor.  And it was
> true today.
>
>          Rochester Post-Bulletin
>          Tuesday September 11, 2001
>
>
> "Hatzenbeler, Tim" <thatzenbeler@clinitech.net>@midrange.com on 11/15/2001
> 04:59:31 PM
>
> Please respond to java400-l@midrange.com
>
> Sent by:  java400-l-admin@midrange.com
>
>
> To:   "'java400-l@midrange.com'" <java400-l@midrange.com>
> cc:
> Subject:  RE: java code help...
>
>
>
> This message is in MIME format. Since your mail reader does not understand
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> I added the 'a' for a reason, i'm trying to figure out how to qulaify the
> field name to a praticular table...
>
>
> > -----Original Message-----
> > From:   Clapham, Paul [SMTP:pclapham@core-mark.com]
> > Sent:   Thursday, November 15, 2001 1:48 PM
> > To:     java400-l@midrange.com
> > Subject:     RE: java code help...
> >
> > Question #1: the actual field name is probably "CUSNUM" and not
> > "A.CUSNUM".
> >
> > Question #2: if you want to use Java to display data in tabular format
> on
> > your PC screen, then you probably want to use a JTable from the Swing
> > components.  But it would take much more than a few minutes to explain
> > that,
> > so I'll just point you towards a tutorial on that subject:
> > http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
> >
> > PC2
> >
> > -----Original Message-----
> > From: Hatzenbeler, Tim [mailto:thatzenbeler@clinitech.net]
> > Sent: November 15, 2001 12:56
> > To: 'java400-l@midrange.com'
> > Subject: java code help...
> >
> >
> > This message is in MIME format. Since your mail reader does not
> understand
> > this format, some or all of this message may not be legible.
> > --
> > [ Picked text/plain from multipart/alternative ]
> > I'm really trying to understand java, and right now, all I have are 2
> > examples, that I found out on the net...
> > And I got them to compile and run, on the PC, using the 400 toolbox
> jar..
> >
> > I was wondering if someone could hold my hand for a few minutes, and
> offer
> > me a great big push in the right direction...
> >
> > Question #1.  I have this code, and I have modified it, so I could
> attempt
> > to qualify the field names...  But it didn't work... Could someone
> please
> > correct my error.
> >
> > ERROR Message at runtime: An undefined column name was detected.
> >
> >     ResultSet rs = stmt.executeQuery ("SELECT * FROM QIWS.QCUSTCDT A
> ORDER
> > BY LSTNAM");
> >    while (rs.next ()) {
> >         String cusnum = rs.getString("A.CUSNUM");
> >
> > Question #2,  Could someone please show me how to take the result set
> that
> > I
> > get, and instead of printing it in a dos window, how would I place the
> > data
> > in a real window on my pc, in a datasheet type view (similar to excel,
> or
> > when I do an SQL through ops nav)...
> >
> > I offer many thanks,  tim...
> > _______________________________________________
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