RE: Unlimited size result sets

["Haas, Matt" <Matt.Haas@xxxxxxxxxxx>]

Buck,

You can implement a scrollable cursor in RPG. Once you've got a scrollable 
cursor, you can tell it what position to start at. The only things you'd need 
to do this is the selection criteria and the starting record number in the 
cursor. The SQL programming book has examples of scrollable cursors.

Matt

-----Original Message-----
From: Buck [mailto:buck.calabro@xxxxxxxxxxxx]
Sent: Thursday, December 18, 2003 1:03 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: Unlimited size result sets


John said:

> We aren't talking about the real world. We are talking about a Java
> Programmer wanting to prove her theory that loading the entire database to
> an in-memory program and flash sorts is faster than recursive calls. Let
her
> have her 15 minutes. When it ends up in the drink, we can get back to
issues
> that really matter.

Yes, you've hit it exactly.  And since I am not a Java Programmer, my advice
on the matter is less than interesting to Those Who Must Be Obeyed ('You are
an iSeries guy.  You do not know about Java.')  Regarding the socket
solution; we've bandied that about, and we were trying to come up with
something that could be swapped out as simply as possible when the network
guys come track me down.  Since we're already using a stored procedure which
returns a result set, the obvious thing is to see how large a result set RPG
can return.  It looks like 16Mb is the reasonable limit without getting into
Teraspace.

There isn't a way to reduce the dataset: it is an itemised corporate
telephone bill for one month, and the spec calls for the end user to be able
to see it all.  Not my spec, but definitely my problem.  For the record, my
proposal is to limit the result set to something in the neighbourhood of a
thousand rows, and use more sophisticated selection criteria (in effect,
alter the spec.)  One issue is that the database does not currently contain
enough columns which are 'interesting' to the end-user; things like their
internal general ledger account and so on.

Thanks for the advice!
  --buck



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