Thanks for bring up this topic, Rui Wang ~ I have fired an Umbrella issue [1] about this topic where we can create sub-tasks.
[1] https://issues.apache.org/jira/browse/CALCITE-3271 Best, Danny Chan 在 2019年8月20日 +0800 AM9:59，Rui Wang <ruw...@google.com.invalid>，写道： > Hi Calcite community, > > I have seen [1] is published, which proposes TVF style TUMBLE/HOP/SESSION > windowing and EMIT syntax for materialization control. > > I tried to search dev@calcite and Calcite JIRA but didn't find those > support above. So is Calcite already support TVF windowing and EMIT syntax > somehow, or it's a future work? > > > > [1]: https://arxiv.org/pdf/1905.12133.pdf > > > -Rui
