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Re: Usage of Volcano or HepPlanner


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
mmior@xxxxxxxxxxxx


Le ven. 11 mai 2018 à 13:15, Davide Lanti <dalanti@xxxxxxxx> 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.
>
>