int readCacheSize = params.readCacheSize ;
int writeCacheSize = params.writeCacheSize ;
// Value part is null (zero length)
RangeIndex rIndex = makeRangeIndex(location, indexName, keyLength, 0, readCacheSize, writeCacheSize) ;
TupleIndex tupleIndex = new TupleIndexRecord(primary.length(), new ColumnMap(primary, indexOrder), indexOrder, rIndex.getRecordFactory(), rIndex) ;
return tupleIndex ;
}