GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/12668
[SPARK-14853] [SQL] Support LeftSemi/LeftAnti in SortMergeJoinExec
## What changes were proposed in this pull request?
This PR update SortMergeJoinExec to support LeftSemi/LeftAnti, so it could
support all the join types, same as other three join implementations:
BroadcastHashJoinExec, ShuffledHashJoinExec,and BroadcastNestedLoopJoinExec.
This PR also simplify the join selection in SparkStrategy.
## How was this patch tested?
Added new tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark smj_semi
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12668.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #12668
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commit cccdcaa7f72fabbf896706f5a48fd759cd720729
Author: Davies Liu <dav...@databricks.com>
Date: 2016-04-25T19:23:16Z
support left semi/anti using SortMergeJoin
commit dd16fe195d9cfb50108dacc2e8fb8c319404e3b6
Author: Davies Liu <dav...@databricks.com>
Date: 2016-04-25T20:02:40Z
clean up join selection
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