[jira] [Assigned] (SPARK-22181) ReplaceExceptWithNotFilter if one or both of the datasets are fully derived out of Filters from a same parent

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-22181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-22181:
------------------------------------

    Assignee:     (was: Apache Spark)

> ReplaceExceptWithNotFilter if one or both of the datasets are fully derived out of Filters from a same parent
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-22181
>                 URL: https://issues.apache.org/jira/browse/SPARK-22181
>             Project: Spark
>          Issue Type: New Feature
>          Components: Optimizer, SQL
>    Affects Versions: 2.1.1, 2.2.0
>            Reporter: Sathiya Kumar
>            Priority: Minor
>
> While applying Except operator between two datasets, if one or both of the datasets are purely transformed using filter operations, then instead of rewriting the Except operator using expensive join operation, we can rewrite it using filter operation by flipping the filter condition of the right node.
> ![Case-1](https://github.com/sathiyapk/Blog-Posts/blob/master/images/spark-optimizer/ReplaceExceptWithNotFilter-case1.png)
> ![Case-2](https://github.com/sathiyapk/Blog-Posts/blob/master/images/spark-optimizer/ReplaceExceptWithNotFilter-case2.png)



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