Re: Activation group for an AFTER external database trigger...

*NEW is a horribly bad idea for a trigger...(or any program that is
repeatedly called)

Yes, if PGMA runs in ACTGRP_A, and the trigger is *CALLER, it will also run
in ACTGRP_A.

Charles

On Wed, Nov 4, 2020 at 10:58 AM Robert Rogerson <rogersonra@xxxxxxxxx>
wrote:

Thanks Alan and Birgitta, to clarify we do not use commitment control.

@Alan if *NEW is used isn't this creating a new activation group each

time

the trigger is fired? Isn't this adding additional overhead.
@Birgitta, If *CALLER is used then is the activation group (the

activation

group that *caller refers to) the activation group of the program which
caused the program to fire?
For example if PGMA runs in a named activation grp (ACTGRP_A) and

updates a

record in the file causing the trigger to fire. IF *caller is specified
for the trigger then does the trigger run in ACTGRP_A?

Thanks,

Rob

On Wed, Nov 4, 2020 at 11:50 AM Alan Campin <alan0307d@xxxxxxxxx> wrote:

That is assuming you are using Commitment Control and who on the IBM i

uses

commitment control? Almost none. If I was wanting to roll back

changes, I

would simply use a Before Trigger and monitor for an error to inform

the

user that the update did not occur. My opinion only.

The one scenario that I have run into where *Caller was mandatory is an
update coming from an external job (A PC job). The trigger call is from

the

OS and the OS is running in default activation group.


On Wed, Nov 4, 2020 at 8:33 AM Birgitta Hauser <Hauser@xxxxxxxxxxxxxxx

wrote:

A Trigger Program should always run in the *CALLER activation group!
Why? If you are working with commitment control, the default

commitment

scope is *ACTGRP, i.e. a COMMIT and/or ROLLBACK will only work

properly

within the same activation group.

Mit freundlichen Grüßen / Best regards

Birgitta Hauser


"Shoot for the moon, even if you miss, you'll land among the stars."

(Les

Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training

them

and keeping them!"
„Train people well enough so they can leave, treat them well enough

so

they

don't want to.“ (Richard Branson)


-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of

Robert

Rogerson
Sent: Mittwoch, 4. November 2020 17:23
To: RPG programming on the IBM i (AS/400 and iSeries)
<rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Activation group for an AFTER external database trigger...

Hi All, I've been trying find how to define the activation group on

an

external (RPG) database trigger.
Should I be using ctl-opt actgrp(*new) orctl-opt actgrp(*caller)?

If anyone knows of a link to a reference that would be great too.

Thanks,

Rob
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