private boolean isNullableSetOfCols(List<String> columnNames, List<ColumnDetail> columnDetails) {
		Iterator<String> itr = columnNames.iterator();
		while (itr.hasNext()) {
			String name = itr.next();
			Iterator<ColumnDetail> detailItr = columnDetails.iterator();
			while (detailItr.hasNext()) {
				ColumnDetail detail = detailItr.next();
				if (detail.getName().equals(name)) {
					if (!detail.isNullable())
						return false;
					break;
				}
			}
		}
		
		return true;
	}