Hi Makis, +1 to Haisheng said!
Apart from HepPlanner, another class that is used often for pre/post processing a plan is RelShuttle [1]. Best, Stamatis [1] https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/rel/RelShuttle.java On Tue, Nov 12, 2019 at 11:22 PM Serafeim (Makis) Papadias < [email protected]> wrote: > Thanks a lot Haisheng. > > I will try it and come back to you if I have some further questions. :) > > Best, > Makis > > > On 12 Nov 2019, at 11:04 PM, Haisheng Yuan <[email protected]> > wrote: > > > > Hi Makis, > > > > You can use HepPlanner and your customized transoformation rule to > rewrite the optimized plan. Top-down or Bottom-up can also be specified. > > Many systems have this kind of post processing phase. > > > > - Haisheng > > > > ------------------------------------------------------------------ > > 发件人：Serafeim (Makis) Papadias<[email protected]> > > 日 期：2019年11月13日 05:37:37 > > 收件人：<[email protected]> > > 主 题：Top-down pass of an optimized plan > > > > Dear all, > > > > I am performing a Volcano optimisation pass first and I receive the root > of the optimised plan from the standard Program in [1]. Afterwards, I want > to perform a top-down pass to the optimised plan and change it a bit by > placing certain operators at specific points. > > > > Do you have any ideas on how to do this properly in Calcite? > > > > Thanks in advance. > > > > Best, > > Makis > > > > > > [1] — > https://calcite.apache.org/apidocs/org/apache/calcite/tools/Programs.html > <https://calcite.apache.org/apidocs/org/apache/calcite/tools/Programs.html > > > >
