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https://issues.apache.org/jira/browse/SPARK-22124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16180096#comment-16180096
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Apache Spark commented on SPARK-22124:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/19345

> Sample and Limit should also defer input evaluation under codegen
> -----------------------------------------------------------------
>
>                 Key: SPARK-22124
>                 URL: https://issues.apache.org/jira/browse/SPARK-22124
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Liang-Chi Hsieh
>            Priority: Minor
>
> We can override {{usedInputs}} to claim that an operator defers input 
> evaluation. {{Sample}} and {{Limit}} are two operators which should claim it 
> but don't. We should do it.



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