RE: Sql Skeleton Sample...

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I finally has some time to get back to this null issue, it turned out, it
wasn't a null date causing my problem, but the fact I needed to compile the
program with the *iso flag, once I did that, I was able to retrieve all the
records...  I had assumed, it was caused by the fact, the dates had null
values, but after using the ifnull and coalesce keyword, the problem still
existed, so I dug a little deeper...

But any how... Thanks for your response, and to the other person who offered
the coalesce advise as well...

Take care, tim

> -----Original Message-----
> From: Phil [SMTP:sublime78ska@yahoo.com]
> Sent: Friday, October 12, 2001 3:41 PM
> To:   rpg400-l@midrange.com
> Subject:      RE: Sql Skeleton Sample...
>
> Tim,
>
> Here's some snipets of what I have:
>
> You need to account for the null indicator.  Here's how I do that:
>      D*------------------
>      D matTktDS      e ds                  extname(mater00002) prefix(mt_)
>      D matTktI         s              5i 0 occurs(arraySize)
>      D                                     based(p_nullDS)
>      D*------------------
>
> and I need to define this as well.  MATER00002 has six columns:
>
>      D arraySize       c                   const(1)
>      D  nullArr                       5i 0 dim(arraySize)
>      D nullDS          ds                  occurs(arraySize)
>      D  null1                         5i 0
>      D  null2                         5i 0
>      D  null3                         5i 0
>      D  null4                         5i 0
>      D  null5                         5i 0
>      D  null6                         5i 0
>      D p_nullDS        s               *   inz(%addr(nullDS))
>
> Then I code the FETCH like this (notice NO comma between the two host
> variables):
>
>      C/exec sql
>      C+ FETCH NEXT FROM @CURSOR INTO :matTktDS:matTktI
>      C/end-exec
>
> Then for each null capable field I have to test for it (in this case, the
> sixth column is mt_Notes and is null capable):
>
>      C                   if        null6 < *zero
>      C                   eval      mt_Notes = *blank
>      C                   endif
>
> Let's say you're selecting two columns only on your SELECT stmt, and one
> is
> null capable.  You could do this:
>
>      C/exec sql
>      C+ FETCH NEXT FROM @CURSOR INTO :cusnbr, :lastDate:lastDateI
>      C/end-exec
>
> The arraySize constant:  I use this because often I'm fetching multiple
> rows
> into a MODS.  Then what I do is an OCCUR for each row returned on both the
> matTktDS and nullDS and test for null each time.
>
> Phil
>
>
>
> > -----Original Message-----
> > From: rpg400-l-admin@midrange.com [mailto:rpg400-l-admin@midrange.com]On
> > Behalf Of Hatzenbeler, Tim
> > Sent: Friday, October 12, 2001 5:57 PM
> > To: 'rpg400-l@midrange.com'
> > Subject: Sql Skeleton Sample...
> >
> >
> > This message is in MIME format. Since your mail reader does not
> understand
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> > [ Picked text/plain from multipart/alternative ]
> > I was wondering, if someone would be willing to share an rpgsql program,
> > that is very robust...
> >
> > I'm looking for the techniques, to be able to handle null values
> > (not change
> > them) but at least let the rpg continue, plus how to handle the various
> > error codes, that might arise..
> >
> > right now, I have null's in my data data types (lovals), and the
> > sql, cann't
> > handle these... So I would like the program to at least keep
> functioning,
> > and then let me handle the nulls later when it comes to displaying
> them...
> >
> > Thanks, tim
> >
> > _______________________________________________
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>
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