Arrays.asList(0));
// -------------------------------------------------------------------------------------
final List<Integer> hashOrders = Arrays.asList(0);
final SelectOperator selectionOrders = new SelectOperator(new BetweenPredicate(
new ColumnReference(_dateConv, 4), true, new ValueSpecification(_dateConv, _date1),
true, new ValueSpecification(_dateConv, _date2)));
// first field in projection
final ValueExpression OrdersOrderKey = new ColumnReference(_sc, 0);