Indexing for LIKE selection

We currently allow users to search a large table for a specific indexed value. Performance is fine.  

However they have now requested to be able to enter a partial string or wildcards.  

I am asssuming we will use the LIKE clause in the select statement.  

Do we need to review how we index the table? If so, what is most appropriate?  

Oracle version is 10.2  

John  

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