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https://issues.apache.org/jira/browse/SPARK-18002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15587624#comment-15587624
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Apache Spark commented on SPARK-18002:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/15547
> Prune unnecessary IsNotNull predicates from Filter
> --------------------------------------------------
>
> Key: SPARK-18002
> URL: https://issues.apache.org/jira/browse/SPARK-18002
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> In PruneFilters rule, we can prune unnecessary IsNotNull predicates if the
> predicate in IsNotNull is not nullable.
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