/**
* It computes the value cardinality of a tuple range.
*
* @return
*/
public static BigDecimal computeCardinalityForAllColumns(
Schema schema, TupleRange range, boolean inclusive) {
Tuple start = range.getStart();
Tuple end = range.getEnd();
Column col;
BigDecimal cardinality = new BigDecimal(1);
BigDecimal columnCard;
for (int i = 0; i < schema.getColumnNum(); i++) {
col = schema.getColumn(i);
columnCard = computeCardinality(col.getDataType(), start.get(i), end.get(i), inclusive);
if (new BigDecimal(0).compareTo(columnCard) < 0) {
cardinality = cardinality.multiply(columnCard);
}
}
return cardinality;
}
@Override
public int compare(TupleRange left, TupleRange right) {
return -(left.compareTo(right));
}