Thanks, I'll check it out. Arun Mahadevan <ar...@apache.org> 于 2019年5月21日周二 01:31写道：
> Heres the proposal for supporting it in "append" mode - > https://github.com/apache/spark/pull/23576. You could see if it addresses > your requirement and post your feedback in the PR. > For "update" mode its going to be much harder to support this without > first adding support for "retractions", otherwise we would end up with > wrong results. > > - Arun > > > On Mon, 20 May 2019 at 01:34, Gabor Somogyi <gabor.g.somo...@gmail.com> > wrote: > >> There is PR for this but not yet merged. >> >> On Mon, May 20, 2019 at 10:13 AM 张万新 <kevinzwx1...@gmail.com> wrote: >> >>> Hi there, >>> >>> I'd like to know what's the root reason why multiple aggregations on >>> streaming dataframe is not allowed since it's a very useful feature, and >>> flink has supported it for a long time. >>> >>> Thanks. >>> >>
