GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/17450
[SPARK-20121][SQL] simplify NullPropagation with NullIntolerant
## What changes were proposed in this pull request?
Instead of iterating all expressions that can return null for null inputs,
we can just check `NullIntolerant`.
## How was this patch tested?
existing tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark null
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17450.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 #17450
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commit dfb70fba832a213f11790a147e505724e1a5b13a
Author: Wenchen Fan <[email protected]>
Date: 2017-03-28T05:32:50Z
simplify NullPropagation with NullIntolerant
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