Hi, I also think it is valuable and reasonable to keep the split/select APIs. They are very convenient and widely used in our platform. I think they are also used in other users' jobs. If the community has doubts about this, IMHO, it would be better to start a user survey.
Best, Vino SHI Xiaogang <shixiaoga...@gmail.com> 于2019年6月17日周一 上午11:55写道： > Hi Xingcan, > > Thanks for bringing it up for discusson. > > I agree with you that we should not deprecate the split/select methods. > Their semantics are very clear and they are widely adopted by Flink users. > We should fix these problems instead of simply deprecating the methods. > > Regards, > Xiaogang > > Xingcan Cui <xingc...@gmail.com> 于2019年6月15日周六 下午4:13写道： > > > Hi all, > > > > Recently, I noticed that the split/select methods in DataStream API have > > been marked as deprecated since 1.7.2 and 1.8.0 (the related JIRA issue > > FLINK-11084 <https://issues.apache.org/jira/browse/FLINK-11084>). > > > > Although the two methods can be replaced by the more powerful side output > > feature[1], I still doubt whether we should really remove them in the > > future. > > > > 1. From semantics, the split/select is the reverse operation to the union > > transformation. Without them, the DataStream API seems to be missing a > > piece. > > > > 2. From accessibility, the side output only works for process functions, > > which means it forces the user to dive into a lower API. > > > > According to FLINK-11084 < > > https://issues.apache.org/jira/browse/FLINK-11084>, there exist some > > problems with the current implementation of the two methods. Maybe we > > should fix the problems and re-active them again. Or if they really need > to > > be deprecated, we should at least mark the corresponding documentation > for > > that : ) > > > > What do you think? > > > > Best, > > Xingcan > > > > [1] > > > https://ci.apache.org/projects/flink/flink-docs-master/dev/stream/side_output.html > > < > > > https://ci.apache.org/projects/flink/flink-docs-master/dev/stream/side_output.html > > > >
