Re: SQL performance -- RPG400-L

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Il giorno mer 21 ago 2024 alle ore 12:24 Daniel Gross <daniel@xxxxxxxx> ha
scritto:

Am 21.08.2024 um 12:11 schrieb Marco Facchinetti <

marco.facchinetti@xxxxxxxxx>:

(Open > Fetch > Close) x 1.260 times, Declare Cursor only once.

But you change the parameters / host variables every time?

Yes, the only host variable (ABCDUTENTE) changes before the OPEN.

In this case I can only shoot wild assumptions - DECLARE is no executable
program statement - it is "executed" at compile time.

Maybe it's that - the DECLARE is executed / optimized at compile time,
whereas the SELECT-INTO is executed / optimized at runtime.

Normally I would assume, that all static SQL statements are optimized at
compile time - whereas dynamic SQL is of course only handled at runtime.

I did test the code in ACS and the cost for a single customer is between
0,9 and 1,4 seconds. So 20 minutes for 1.260 customers is "correct".

As I said - wild assumptions - maybe Barbara or Birgitta can clarify that.

Let's wait and see :-)

HTH
Daniel

Thanks again

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