RE: Triggers

Steve,

As long as you on a relatively recent version of the OS, the parts of the C compiler needed to create
SQL stored procedures and triggers are built into the OS.

You don't need the 5722-WDS *LICPGM on your production system.

HTH,
Charles

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Steve Landess
Sent: Friday, August 24, 2007 10:49 AM
To: Midrange Systems Technical Discussion
Subject: Re: Triggers

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" <WiltC@xxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
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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