RE: Triggers

["Smith, Nelson" <NSmith@xxxxxxxxxxx>]

Peter,

This is exactly the method I use on all my triggers, except you never want
to use a CL as the originating trigger "shell" program because it, by
default, always ends like an RPG program with LR on.  Therefore, incurring
the very high overhead of recreating the CL program on every single record.
Go ahead and use an RPG program without LR as the "shell" and performance is
quite good.

I also write all errors encountered, including the "inactive" trigger
situation you mentioned, to a log file which I keep an eye on for early
indications of any problems going on.  If you leave all programs and service
programs activated, and stay away from anything that call CL's,  performance
is not an issue.

> -----Original Message-----
> From: Peter Dow [SMTP:pcdow@yahoo.com]
> Sent: Wednesday, December 05, 2001 11:16 PM
> To:   midrange-l@midrange.com
> Subject:      Re: Triggers
>
> Hi Eric,
>
> I never did see the original for this.  One software vendor I know of
> actually has a CL trigger program that calls an RPGLE program that reads a
> file keyed by file name - each record contains the name of a trigger
> program
> and a status flag as to whether that trigger program is active or not --
> and
> for each active record, calls the trigger program.  Oh, and that's not
> all.
> It also reads another file to determine whether changes triggered by a
> particular user are processed or not.
>
> I'm not advocating this method, I'm simply stating that it's in use.  And
> yes, performance was not what you'd call optimal.  For normal user updates
> via the application it could keep up.  But once one of the analysts did an
> SQL UPDATE (the user profile was not in the "ignore" file) and it took a
> couple of hours for the trigger programs to catch up.
>
> I think the data queue method mentioned by Alex Moore is a far better
> method
> of handling the requirement.
>
> Regards,
> Peter Dow
> Dow Software Services, Inc.
> 909 425-0194 voice
> 909 425-0196 fax
>


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