Hi Wei,
is `reset_accumulator` still necessary? We dropped it recently in the
Java API because it was not used anymore by the planner.
Regards,
Timo
On 31.08.20 15:00, Wei Zhong wrote:
Hi Jincheng & Xingbo,
Thanks for your suggestions.
I agree that we should keep the user interface uniform. I'll adjust the design
to allow users to specify the result type and accumulator type via @udaf.
Best,
Wei
在 2020年8月31日，18:06，Xingbo Huang <hxbks...@gmail.com> 写道：
Hi Wei,
Thanks a lot for the discussion.
Thanks a lot for Jincheng's suggestion of discussing FLIP-137 and FLIP-139
together.
One question is whether we can use @udaf which is introduced in FLIP-137[1]
to describe pandas udaf and general python udaf together. From the overall
view of Python User Defined Function, we use @udf to describe general
python udf and pandas udf, @udtf to describe python udtf, and @udaf to
describe general python udaf and pandas udaf, which is more unified.
[1]
https://cwiki.apache.org/confluence/display/FLINK/FLIP-137%3A+Support+Pandas+UDAF+in+PyFlink#FLIP137:SupportPandasUDAFinPyFlink-Interfaces
Best,
Xingbo
jincheng sun <sunjincheng...@gmail.com> 于2020年8月31日周一 上午11:11写道：
Hi Wei,
Thanks for the discussion! Overall, + 1 for this FLIP.
One question is, can the @udaf added by flip-137 be used in General Python
UDAF?
Would be gread if we can consider it combination with FLIP-137 for design.
What do you think?
Best,
Jincheng
Wei Zhong <weizhong0...@gmail.com> 于2020年8月26日周三 上午11:28写道：
Hi everyone,
I would like to start discussion about how to support General Python
User-Defined Aggregate Function on Table API.
FLIP-58[1] has already introduced the stateless Python UDF and has
already
been supported in the previous releases. However the stateful Python UDF,
i.e. User-Defined Aggregate Function is not supported in PyFlink yet. We
want to introduce the general Python user-defined aggregate function for
PyFlink Table API.
Here is the design doc:
https://cwiki.apache.org/confluence/display/FLINK/FLIP-139%3A+General+Python+User-Defined+Aggregate+Function+Support+on+Table+API
Looking forward to your feedback!
Best,
Wei
[1]
https://cwiki.apache.org/confluence/display/FLINK/FLIP-58%3A+Flink+Python+User-Defined+Stateless+Function+for+Table
