Apache Spark commented on SPARK-18002:

User 'viirya' has created a pull request for this issue:

> 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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