[jira] [Commented] (SPARK-21315) Skip some spill files when generateIterator(startIndex) in ExternalAppendOnlyUnsafeRowArray.

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-21315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16074549#comment-16074549 ] 

Apache Spark commented on SPARK-21315:
--------------------------------------

User 'jinxing64' has created a pull request for this issue:
https://github.com/apache/spark/pull/18541

> Skip some spill files when generateIterator(startIndex) in ExternalAppendOnlyUnsafeRowArray.
> --------------------------------------------------------------------------------------------
>
>                 Key: SPARK-21315
>                 URL: https://issues.apache.org/jira/browse/SPARK-21315
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.1.1
>            Reporter: jin xing
>
> In current code, it is expensive to use {{UnboundedFollowingWindowFunctionFrame}}, because it is iterating from the start to lower bound every time calling {{write}} method. When traverse the iterator, it's possible to skip some spilled files thus to same some time.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

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