Hi, As far as I know, TableAggregateFunction is not supported yet in batch mode[1]. You can try to use it in stream mode.
[1] https://issues.apache.org/jira/browse/FLINK-10978 Best, Xingbo Leonard Xu <xbjt...@gmail.com> 于2020年12月8日周二 下午6:05写道： > Hi, appleyuchi > > Sorry for the late reply, > but could you describe you problem more or post your exception stack? The > doc you posted has contained the section to define and register function. > > And I suggest you post your entire code in email directly that can > reproduce the problem, thus the community > can understand and help you resolve the question better. > > Best， > Leonard > > > > > I'm learning document > <https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/tableApi.html> > > part *Flat Aggregate* > > > My code is: > > https://paste.ubuntu.com/p/HmB4q2WJSb/ > > Could you tell me how to register TableAggregateFunction > > Thanks for your help > > >
