The HepPlanner does not use any cost model by design and applies all applicable rules as you observed. If you want to do cost-based optimization, you should use VolcanoPlanner.
-- Michael Mior [email protected] Le ven. 11 mai 2018 à 13:15, Davide Lanti <[email protected]> a écrit : > Dear devs, > > I am trying to use the HepPlanner, but apparently it does not apply > rules according to the cost model (in my case, it simply applies all > applicable rules). > > Do I need the VolcanoPlanner to obtain a cost-based query transformation? > > Best, Davide. > >
