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I have 1000+ programs reading a customer master file (the old cust file).
Can I add a trigger program which performs the following:

Whenever a program which reads a record from the old customer master file:

Read a different new customer file, get the customer's address from the new
file, and place the new address field into the address field in the old
customer record format.

Using this method, I could add a new file and not have to change any of the
many programs using the old customer master file.

If not a trigger program, is there any other method to accomplish this on
the Iseries?

I am aware of OVRDBF, but that will not allow me to grab select fields from
another file.

Also I am familiar with OPNQRYF, but that would require CL changes and would
limit the ease of implementation.  Also, OPNQRYF would not support any logic
built into the record retrieval.

If I could use a trigger program, in theory, I could make a database change
which would require no changes to programs using the customer file.

Thanks!

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