GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/11235
[SPARK-13249][SQL] Add Filter checking nullability of keys for inner join
JIRA: https://issues.apache.org/jira/browse/SPARK-13249
For inner join, the join key with null in it will not match each other, so
we could insert a Filter before inner join (could be pushed down), then we
don't need to check nullability of keys while joining.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/viirya/spark-1 add-filter-for-innerjoin
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11235.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 #11235
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commit 216305fef918f46d50af7107c7ea3182ad91afcf
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-02-17T06:31:03Z
Add Filter checking nullability of keys for inner join.
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