// No filter and no select-clause: return underlying event
public virtual Object Evaluate(
EventBean[] eventsPerStream,
bool newData,
ICollection <EventBean> matchingEvents,
ExprEvaluatorContext exprEvaluatorContext,
ExprSubselectRowNode parent)
{
if (matchingEvents.Count > 1)
{
Log.Warn(parent.GetMultirowMessage());
return(null);
}
return(EventBeanUtility.GetNonemptyFirstEventUnderlying(matchingEvents));
}