Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/21109
do we have a design doc? I have a couple of high-level questions:
1. what if the range is big and the queue OOM?
2. can't we apply it with cartesian join if there is no equal condition?
and what about broadcast join?
3. if the equal join key is skewed, then we kind of doing this
sort-merge-range-join in a single thread, even if the range join key is not
skewed.
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