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https://issues.apache.org/jira/browse/SPARK-24193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-24193.
---------------------------------
Resolution: Fixed
Fix Version/s: 2.4.0
Issue resolved by pull request 21252
[https://github.com/apache/spark/pull/21252]
> Sort by disk when number of limit is big in TakeOrderedAndProjectExec
> ---------------------------------------------------------------------
>
> Key: SPARK-24193
> URL: https://issues.apache.org/jira/browse/SPARK-24193
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: jin xing
> Assignee: jin xing
> Priority: Major
> Fix For: 2.4.0
>
>
> Physical plan of "_select colA from t order by colB limit M_" is
> _TakeOrderedAndProject_;
> Currently _TakeOrderedAndProject_ sorts data in memory, see
> https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/limit.scala#L158
>
> Shall we add a config -- if the number of limit (M) is too big, we can sort
> by disk ? Thus memory issue can be resolved.
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