FBI or Shadow column?

From a general viewpoint, what is the best way to search a db for someone's name? Using a Function Based Index on UPPER(Last_Name) or using a trigger to insert data into a Shadow Column, i.e. on INSERT or UPDATE :new.Shadow := UPPER(Last_Name)?

I'm asking this in the context of where it is very important to keep the original case of the name as given by the person, because for example, a name like Colm Ua hUigínn is a valid name in Irish, and indeed, capitalising the "h" is a mistake, even if the rest of the name is UPPERED.

I did this using a shadow column in another db system (see .sig), and am just wondering about the advantages/disadvantages of shadows versus FBI's. I'm assuming that the extra column needed is, to all intents and purposes, negligible.

Paul...

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plinehan __at__ yahoo __dot__ __com__

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