A database engine and {HEAD ~ optimizer framework support creation} of a series of profiling indices over {TAIL ~ a column} having character string data, such as a traditional “varchar” data type 
A database engine and { HEAD ~ optimizer framework support creation } of a series of profiling indices over { TAIL ~ a column } having character string data , such as a traditional “ varchar ” data type
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH