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Posted to user@spark.apache.org by 张万新 <ke...@gmail.com> on 2017/09/30 02:44:02 UTC

[Structured Streaming] How to compute the difference between two rows of a streaming dataframe?

Hi,

I want to compute the difference between two rows in a streaming dataframe,
is there a feasible API? May be some function like the window function *lag
*in normal dataframe, but it seems that this function is unavailable in
streaming dataframe.

Thanks.