[1] is a good resource on differences between Volcano and Hep planners. I used both Hep and Volcano planners in SamzaSQL. But we don't have a proper cost model for streaming queries at this stage.
Thanks Milinda [1] http://www.hydromatic.net/wiki/FarragoHeuristicPlanner On Tue, Jun 14, 2016 at 10:14 PM, Zhangrucong <zhangruc...@huawei.com> wrote: > Hello everyone: > > Now I am learning calcite streamSQL. Samza is a stream system and uses > calcite very well. I have a question about planner. Anyone can help me. > Thanks in advance. > > The question is following: > > 1、 I want to know what is the difference between HepPlanner and > VolcanoPlanner? For streamSQL ,which one is better? Samza uses which model? > > Thank you very much! > > -- Milinda Pathirage PhD Student | Research Assistant School of Informatics and Computing | Data to Insight Center Indiana University twitter: milindalakmal skype: milinda.pathirage blog: http://milinda.pathirage.org
