AFAIK, grouping sets has already been supported for streaming in blink planner. You could check FLINK-12192 for details.
Regards, Dian > 在 2019年9月10日，下午6:51，刘建刚 <liujiangangp...@gmail.com> 写道： > > I want to implement grouping set in stream. I am new to flink sql. I > want to find a example to teach me how to self define rule and implement > corresponding operator. Can anyone give me any suggestion?
