Github user YanjieGao commented on the pull request:
https://github.com/apache/spark/pull/1134#issuecomment-48707289
Hi , I also make a left semi join .I don't know is this join as a
optimization as the left semi join or as a single join algorithm. I think the
1127 PR also has some optimization need to do .Do you think this 1127 PR has it
value to be merged ?Thanks a lot.
https://github.com/apache/spark/pull/1127
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