Hi all, I don't understand what is the correct way to set the noDag [1] parameter in HepPlanner. I understand what it does (internal query graph becomes a tree or a DAG) but I don't see why should I use the one or the other and when.
Is it performance related? Are there implications on the rules that can be used with the planner? Does it limit the class of queries that need to be transformed? Thanks in advance, Stamatis [1] https://github.com/apache/calcite/blob/883666929478aabe07ee5b9e572c43a6f1a703e2/core/src/main/java/org/apache/calcite/plan/hep/HepPlanner.java#L131
