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  3. April 2016

Re: TRIGGERS

On 4/25/2016 9:08 AM, Hoteltravelfundotcom wrote:
How can I know if there is a trigger on a particular file?
and can there be a trigger to limit the number of records as follows:

Item# Rebate date amt
123 050116 100
123 050216 100

Can I have a trigger say that you can only have 2 rebates per item?

A trigger is a program that you write.
Can you write a program that will limit rebates to 2 per item?

The thing that most people new to triggers miss is that when a trigger
wants to 'deny' an update (for instance the third rebate) it sends an
escape message back to the program doing the update. So in order to use
triggers that deny updates, your regular programs need to check for I/O
errors.


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