GitHub user viirya opened a pull request:

    [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 before 
opening a pull request.

You can merge this pull request into a Git repository by running:

    $ git pull prune-isnotnull

Alternatively you can review and apply these changes as the patch at:

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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