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https://issues.apache.org/jira/browse/SPARK-13869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15193953#comment-15193953
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Apache Spark commented on SPARK-13869:
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User 'sameeragarwal' has created a pull request for this issue:
https://github.com/apache/spark/pull/11670
> Remove redundant conditions while combining filters
> ---------------------------------------------------
>
> Key: SPARK-13869
> URL: https://issues.apache.org/jira/browse/SPARK-13869
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Sameer Agarwal
> Priority: Minor
>
> We should modify the existing CombineFilters rule in catalyst to remove
> redundant conditions while combining individual filter predicates. For
> instance, queries of the form table.where('a === 1 && 'b === 1).where('a ===
> 1 && 'c === 1) should be correctly optimized to table.where('a === 1 && 'b
> === 1 && 'c === 1) (instead of table.where('a === 1 && 'a === 1 && 'b === 1
> && 'c === 1))
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