Hi all,

I want to implement a join operator which can use different strategies for
joining tuples. I saw that with CoProcessFunction I am able to implement
low-level joins [1]. However, I do know how to decide between different
algorithms to join my tuples.

On the other hand, to do a broadcast join I will need to use the broadcast
operator [2] which yields a BroadcastStream. Therefore, I am not sure if I
will need to implement my own operator to do this or if it is still
possible to do with CoProcessFunction.

Does anyone have some clues for this matter?
Thanks

[1]
https://ci.apache.org/projects/flink/flink-docs-release-1.8/dev/stream/operators/process_function.html#low-level-joins
[2]
https://ci.apache.org/projects/flink/flink-docs-stable/dev/stream/state/broadcast_state.html
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