@Override
protected IUnnestingEvaluator createEvaluator(IHyracksTaskContext ctx, IScalarEvaluator[] args)
throws AlgebricksException {
final SequencePointable seqp = (SequencePointable) SequencePointable.FACTORY.createPointable();
return new AbstractTaggedValueArgumentUnnestingEvaluator(args) {
private int index;
private int seqLength;
@Override
public boolean step(IPointable result) throws AlgebricksException {