>With the size and complexity of Calcite project, ... nobody can really understand anything, so there's no point of waiting for +1 :)
Julian, Xiening you both are right. I would add a small note that "easy to understand" titles significantly help for reviewers. Here's a recent case: https://github.com/apache/calcite/pull/1814 [CALCITE-3804] Use RelCollation interface in RelCollationImpl compareTo and satisfies methods I even tried to reverse-engineer the intention behind the change, however, I just stopped. If only the author provided that intention in the PR commit... Vladimir
