Re: Triggers

The creation of SQL triggers, at least on current releases, does not require that the C compiler be installed on the system.

Bruce Vining

Steve Landess <sjl_abc@xxxxxxxxxxx> wrote:
Interesting coincidence, and timely question...

We are experimenting with using triggers for part of our encryption project,
by creating SQL update and insert triggers which would call a UDF or stored
procedure to perform the encryption of the field at output time.

However, when you create an SQL trigger the database manager actually
creates and compiles an ILE C program which becomes the trigger-handling
program on the file.

Please don't let it be true, but does this mean that we would need to have
the compilers on our production system in order to create the triggers?
This would violate our rules about having a compiler on the production
system/LPAR...

Regards,
Steve

----- Original Message -----
From: "Wilt, Charles"
To: "Midrange Systems Technical Discussion"
Sent: Friday, August 24, 2007 6:36 AM
Subject: RE: Triggers

No, he's right.

You can put an SQL trigger on a particular field. Unless that field
changes, the trigger won't even
fire.

However, as you and others have pointed out you can check to see which
fields have changed in your HLL
trigger program. Obviously, with an SQL trigger the DB has to be doing
basically the same thing.

So I don't think there's two much difference between the two methods.

Charles

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Troy Foster
Sent: Thursday, August 23, 2007 1:48 PM
To: Midrange Systems Technical Discussion
Subject: Re: Triggers

your second is wrong. I check field changes all the time with
my PF triggers.

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