GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/10812
[SPARK-12867] [SQL] Nullability of Intersect can be stricter
JIRA: https://issues.apache.org/jira/browse/SPARK-12867
When intersecting one nullable column with one non-nullable column, the
result will not contain any null. Thus, we can make nullability of `intersect`
stricter.
@liancheng Could you please check if the code changes are appropriate? Also
added test cases to verify the results. Thanks!
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark nullabilityIntersect
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10812.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 #10812
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commit 7e5b90e8ae5c698fa8cae85c333954d43614aae2
Author: gatorsmile <[email protected]>
Date: 2016-01-18T19:01:05Z
make intersect nullability more restrict
commit 521945185e3c202941d510099b4ee07919c18676
Author: gatorsmile <[email protected]>
Date: 2016-01-18T19:28:00Z
Merge remote-tracking branch 'upstream/master' into nullabilityIntersect
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