Aborting write with a trigger program

V3R7M0

There is a situation where if a blank record is inserted into out of our 
physical files it totally throws our entire system out of whack.  This should 
never happen as there is supposed to be validation against the data in the 
entry programs, but it has happened (3 times in the last 6 years).  It just 
happened a week ago and I had to fix it (by deleting the blank record).

What I am going to do is to add a trigger program on *INSERT *BEFORE and if the 
key information is *BLANK I want to abort the write.  Also if possible I want 
to generate a program error so that the program attempting to write or update 
the data to blank bombs out.

I am looking in the online book OS/400 DB2 for OS/400 Database Programming V3R2 
and read the entire section dedicated to triggers, but really didn't see how to 
abort the write.

Any suggestions?

Regards,

Jim Langston
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