Re: Select into versus SETGT and READPE or READP -- RPG400-L

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Chances are that native I/O will still outperform but why not test it if you are concerned.

Basically one of the most =frustrating things for the database folks is that much of what they do to improve performance will also benefit native I/O so they are constantly chasing a moving target!

Jon Paris

On Nov 9, 2021, at 1:49 PM, Alan Cassidy <cfuture@xxxxxxxxxxx> wrote:

i'm using SQL to get the maximum value for a field meeting key field WHERE comparisons into an RPG variable.

I'm replacing code that used the SETGT with READPE to find the maximum value.

I'm wondering which method shows better performance if somebody knows. I was told once that single-value CHAIN trumps using SQL to get one value for one composite key. But time has passed and IBM keeps on juicing up the SQL engine...

-Alan Cassidy

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