There are two ways to contribute to Calcite: attach a patch to a JIRA case, or submit a pull request to https://github.com/apache/incubator-calcite/pulls <https://github.com/apache/incubator-calcite/pulls>. I — and I presume other committers — don’t get notified, which means that the patch/pull request lingers until a committer happens to notice it.
What do other Apache projects do? Julian
