Is watermark is ever discussed in calcite? In order to make enumerable implementation useful, we will need watermark support. Watermark will be just a value that represents a time and keep advancing to +inf. It generates from sources and propagate to all RelNodes. Emit syntax will require such tool to determine when window will close and then emit data.
-Rui On Tue, Aug 20, 2019 at 11:51 PM Danny Chan <[email protected]> wrote: > Sorry, I have no permission to grant you the JIRA contributor permission, > you can send another mail asking for this. > > Best, > Danny Chan > 在 2019年8月21日 +0800 AM11:58，Rui Wang <[email protected]>，写道： > > Thanks Danny. I have filed a sub-task under it: CALCITE-3272. > > > > Can you grant me contributor permission so I can assign it to myself? > > > > > > -Rui > > > > On Tue, Aug 20, 2019 at 8:24 PM Danny Chan <[email protected]> wrote: > > > > > 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 <[email protected]>，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 > > > >
