Why we cannot use the output order of big table?
Chrysan Wu Phone：+86 17717640807 2018-06-28 21:48 GMT+08:00 Marco Gaido <marcogaid...@gmail.com>: > The easy answer to this is that SortMergeJoin ensure an outputOrdering, > while BroadcastHashJoin doesn't, ie. after running a BroadcastHashJoin you > don't know which is going to be the order of the output since nothing > enforces it. > > Hope this helps. > Thanks. > Marco > > 2018-06-28 15:46 GMT+02:00 吴晓菊 <chrysan...@gmail.com>: > >> >> We see SortMergeJoinExec is implemented with >> outputPartitioning&outputOrdering while BroadcastHashJoinExec is only >> implemented with outputPartitioning. Why is the design? >> >> Chrysan Wu >> Phone：+86 17717640807 >> >> >
