RE: Unlimited size result sets

["Bob cozzi" <cozzi@xxxxxxxxx>]

Buck,
>> She says that this is how things work in the 
>> real world (as opposed to a page at a time.)
100Meg return variables? Show me that in the "real world".
What "real world" does she live in, an MTV show "Real World" about a bunch
of pretentious kids who think they know everything about the world around
them? In other words, an amateur. (Sorry for the harsh words.)


Bob Cozzi
Cozzi Consulting
www.rpgiv.com


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Walden H. Leverich III
Sent: Friday, December 19, 2003 3:54 PM
To: 'RPG programming on the AS400 / iSeries'
Subject: RE: Unlimited size result sets

>My Java person insists that she wants me to return 500k+
>rows of data to her in a result set. 

What's she smoking? Simply do the math:

    500,000 rows
x       200 bytes per row[1]
-----------
100,000,000 byes of data (100 MEG)

She wants to throw around 100Meg data structures in Java? Tell me this isn't
a web application where there will be multiple users doing this on a single
server, just think, 10 users would be a Gigabyte of memory just for the data
structure.

Next you'll tell me she wants to hold these structures in session objects.
<G>

-Walden

[1] Probably much higher, especially considering Unicode

------------
Walden H Leverich III
President
Tech Software
(516) 627-3800 x11
(208) 692-3308 eFax
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com 

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)
 
-----Original Message-----
From: Buck [mailto:buck.calabro@xxxxxxxxxxxx] 
Sent: Wednesday, December 17, 2003 4:47 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Unlimited size result sets

Yes it's me again.  My Java person insists that she wants me to return 500k+
rows of data to her in a result set.  Those of us on the iSeries side think
this is not a good idea.  She says that this is how things work in the real
world (as opposed to a page at a time.)

In the interest of gathering benchmarking data, we'd like to try.  The catch
is the number of occurrences for a multiple occurrence DS.  The obvious
workaround is to base the DS on a pointer, which works great up to 16 megs.
But my result set is going to be much larger than that.  I can certainly
ALLOC more memory and use another DS, but I don't see any way to guarantee
contiguous memory, and without that I can't guarantee that the result set
will be right.
  --buck







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