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Using the catch exceptions method

EXPERT RESPONSE FROM: Matthew Billingham

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QUESTION POSED ON: 02 June 2005
I have an upload program from which I have uploaded some data. If the record already exists in my Z table, it gives me a runtime error and a dump.

I want to catch that runtime error and return to the program without having a dump, so I am trying to use the catch exceptions method. Can you tell me how to do that?

EXPERT RESPONSE
You could check whether the value is already there, and use insert or update accordingly. Modify will work automatically -- inserting if the record isn't there, updating it if it is -- but is expensive in processing terms. If you look at the documentation of insert, you'll see that it does not specify any catchable exception. Therefore you cannot intercept it with the catch exceptions method.

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