Hi, Jocean shi The convention is a kind of trait, and not decided by cost model and meratada. If you wanna output relNode with specified trait def, you should passed the trait defs to the program. See [1].
[1] https://github.com/apache/calcite/blob/ffca956be03a99cd11e440d652b09674aaa727e6/core/src/main/java/org/apache/calcite/tools/Program.java#L38 public interface Program { RelNode run(RelOptPlanner planner, RelNode rel, RelTraitSet requiredOutputTraits, List<RelOptMaterialization> materializations, List<RelOptLattice> lattices); } Best, Danny Chan 在 2019年3月14日 +0800 AM10:43，Jocean shi <[email protected]>，写道： > Hi, > > In other world. That question can convert to that if a RelNode has a > RelSet and the RelSet have two RelSubset then how to chose RelSubset > > Best > Jocean.shi > > > > > Stamatis Zampetakis <[email protected]> 于2019年3月13日周三 下午4:09写道： > > > Hi Jocean, > > > > It is not very clear what is the problem you are trying to solve. > > Maybe it could help if you could share the input plan, planner rules, and > > the expected output. > > > > > > Best, > > Stamatis > > > > Στις Τετ, 13 Μαρ 2019 στις 2:51 π.μ., ο/η Yuzhao Chen < > > [email protected]> > > έγραψε: > > > > > Yeah, did you replace the Convention trait of the matched node when > > > matches ? > > > > > > Best, > > > Danny Chan > > > 在 2019年3月12日 +0800 PM8:59，Jocean shi <[email protected]>，写道： > > > > I sure this ConverterRule matches. In other world, this method has > > > excuted. > > > > but the final result is only root RelNode has been replaced. > > > > > > > > > > > > Best > > > > Jocean.shi > > > > >
