Github user chenghao-intel commented on the pull request:
https://github.com/apache/spark/pull/7379#issuecomment-122176186
This is a very interesting optimization, but will it be more general if we
consider that with the SortMergeJoin? As well as the case like:
```
SELECT A.*,
B.*
FROM tableA A
JOIN tableB B
ON A.start <= B.start
```
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