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https://issues.apache.org/jira/browse/SPARK-18601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15703036#comment-15703036
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Apache Spark commented on SPARK-18601:
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User 'eyalfa' has created a pull request for this issue:
https://github.com/apache/spark/pull/16043
> Simplify Create/Get complex expression pairs in optimizer
> ---------------------------------------------------------
>
> Key: SPARK-18601
> URL: https://issues.apache.org/jira/browse/SPARK-18601
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Herman van Hovell
> Assignee: Eyal Farago
>
> It often happens that a complex object (struct/map/array) is created only to
> get elements from it in an subsequent expression. We can add an optimizer
> rule for this.
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