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https://issues.apache.org/jira/browse/SPARK-13495?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yin Huai resolved SPARK-13495.
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Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 11372
[https://github.com/apache/spark/pull/11372]
> Add Null Filters in the query plan for Filters/Joins based on their data
> constraints
> ------------------------------------------------------------------------------------
>
> Key: SPARK-13495
> URL: https://issues.apache.org/jira/browse/SPARK-13495
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Sameer Agarwal
> Fix For: 2.0.0
>
>
> We should add an optimizer rule that attempts to eliminate reading
> (unnecessary) NULL values if they are not required for correctness by
> inserting isNotNull filters is the query plan. These filters should be
> inserted beneath existing Filters and Join operators and are inferred based
> on their data constraints.
> For example, if we have filter on a = 10, we know that null values will not
> pass this predicate. So, we can add a IsNotNull below it.
> cc [~yhuai] [~nongli]
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