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https://issues.apache.org/jira/browse/SPARK-20350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15970372#comment-15970372
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Apache Spark commented on SPARK-20350:
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User 'ptkool' has created a pull request for this issue:
https://github.com/apache/spark/pull/17650
> Apply Complementation Laws during boolean expression simplification
> -------------------------------------------------------------------
>
> Key: SPARK-20350
> URL: https://issues.apache.org/jira/browse/SPARK-20350
> Project: Spark
> Issue Type: Improvement
> Components: Optimizer
> Affects Versions: 2.1.0
> Reporter: Michael Styles
>
> Apply Complementation Laws during boolean expression simplification.
> * A AND NOT(A) == FALSE
> * A OR NOT(A) == TRUE
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