[ 
https://issues.apache.org/jira/browse/SPARK-24193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Wenchen Fan reassigned SPARK-24193:
-----------------------------------

    Assignee: jin xing

> 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.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org

Reply via email to