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https://issues.apache.org/jira/browse/SPARK-18089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15604351#comment-15604351
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Apache Spark commented on SPARK-18089:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/15596
> Remove CollectLimitExec operator
> --------------------------------
>
> Key: SPARK-18089
> URL: https://issues.apache.org/jira/browse/SPARK-18089
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> Currently, CollectLimitExec is an operator used when the logical Limit is the
> last operator in a logical plan. In fact, the job of CollectLimitExec is not
> different to GlobalLimitExec. We can do little refactoring to GlobalLimitExec
> and replace CollectLimitExec.
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