public static OverwritePolicy byDateFromTo(String attribute, Calendar start, Calendar end) {
		return new DateRangeOverwritePolicy(attribute, start, end);
	}
public static OverwritePolicy byDateFromTo ( String attribute , Calendar start , Calendar end ) { return new DateRangeOverwritePolicy ( attribute , start , end ) ; }
Returns an {@link OverwritePolicy} that deletes records with a date
between or on the given dates in the specified column.
<p>
Records with an empty date value in existing data are also deleted.

@param attribute date attribute to compare
@param start first day (inclusive) from which to delete data
@param end last day (inclusive) up to which to delete data
@return {@link OverwritePolicy} object