Hi, We want to use Volcanno planner and get back the optimized Logical RelNode. Currently, we modified CalcitePrepareImpl.java <https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/prepare/CalcitePrepareImpl.java>, so that it returns us the optimized RelNode half way through, but it's Enumberable. We were trying to find cleaner ways to do it through Frameworks and stumbled upon this piece of code in Apache Drill: DrillSqlWorker <https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/DrillSqlWorker.java>. Here Frameworks is used to get RelNode, which they pass to Hep planner. We tried to do same with Volcanno Planner but it throws up during optimization saying "Relational expression .. belongs to a different planner than is currently being used". Any other way we can do it or are we missing something here ?
Regards, Amogh
