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