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@Rob

I am using a Declare process reading each record one at a time.

Darryl

On Thu, Apr 19, 2018 at 10:30 AM, Rob Berendt <rob@xxxxxxxxx> wrote:

Well, when you do a RPG read does it move data into the buffer at *INZSR
or at each READ?

Perhaps we need to know more about your UDF. There's a big difference
between:

exec sql values MyUdf(...) into :MyVariable;
outside of any loop

and

exec sql define C1 cursor for select ColA, ColB, ColC, MyUDF(....) from
Mytable;


Rob Berendt
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IBM Certified System Administrator - IBM i 6.1
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Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
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Kendallville, IN 46755
http://www.dekko.com





From: a4g atl <a4ginatl2@xxxxxxxxx>
To: midrange-l@xxxxxxxxxxxx
Date: 04/19/2018 10:24 AM
Subject: Performance question using a simple UDF
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



I am using my first UDF on a single field and the results are good.

But, the performance seems to be poor. The process is a little complex due
to the file structure. I have a file for the current 3 months of orders.
There is another file containing the current years records after being
transferred from the current file and finally another file with the
previous years data.

There are a total of approximate 400k records in all the files.

I have UNIONed the files.

The question on performance is:

- Does the system apply the UDF values at program initiation time, like
*INZSR or simply at the time the record is read?

TIA

Darryl Freinkel
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