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