GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/15547
[SPARK-18002][SQL] Pruning unnecessary IsNotNull predicates from Filter
## What changes were proposed in this pull request?
In `PruneFilters` rule, we can prune unnecessary `IsNotNull` predicates if
the predicate in `IsNotNull` is not nullable.
## How was this patch tested?
Jenkins tests.
Please review
https://cwiki.apache.org/confluence/display/SPARK/Contributing+to+Spark before
opening a pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/viirya/spark-1 prune-isnotnull
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15547.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 #15547
commit a264ebac6924ae7184abe6fc75fa0dfb659b7d54
Author: Liang-Chi Hsieh
Date: 2016-10-19T04:11:54Z
Pruning unnecessary IsNotNull predicates from Filter.
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