(Guessing you meant to respond to me)<p>Excellent, I&#x27;m glad that the &quot;big data&quot; world is starting to look at database literature in terms of how it does execution, as there is much to be learned.<p>Most of these systems are extremely inefficient (looking at you Hadoop), when they don&#x27;t really have to be.  Efficient code generation should be table stakes for any serious processing framework IMO.