{HEAD ~ The invention} relates to {TAIL ~ database management systems}, and in particular, to generating one or more indices over a table column 
{ HEAD ~ The invention } relates to { TAIL ~ database management systems } , and in particular , to generating one or more indices over a table column
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH