{HEAD ~ Embodiments} of {TAIL ~ the present invention} include a database engine and optimizer framework that support creation of a series of profiling indices over a column having character string data, such as a traditional “varchar” or “char” data type 
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{ HEAD ~ Embodiments } of { TAIL ~ the present invention } include a database engine and optimizer framework that support creation of a series of profiling indices over a column having character string data , such as a traditional “ varchar ” or “ char ” data type
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