Vladimir, all you need to do is to change the convention of the root node, the volcano would propagate the convention to all its input nodes when registering them to the planner. You can take this code [1] for reference :)
[1] https://github.com/apache/calcite/blob/1ef2821695ca6e10fbad7b8efe7246c4a20143af/core/src/main/java/org/apache/calcite/tools/Programs.java#L324 Best, Danny Chan 在 2019年10月29日 +0800 AM5:24，[email protected]，写道： > > n of the scan.
