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From "Davies Liu (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-12795) Whole stage codegen
Date Tue, 24 May 2016 17:18:12 GMT

     [ https://issues.apache.org/jira/browse/SPARK-12795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Davies Liu resolved SPARK-12795.
--------------------------------
       Resolution: Fixed
    Fix Version/s: 2.0.0

> Whole stage codegen
> -------------------
>
>                 Key: SPARK-12795
>                 URL: https://issues.apache.org/jira/browse/SPARK-12795
>             Project: Spark
>          Issue Type: Epic
>          Components: SQL
>            Reporter: Davies Liu
>            Assignee: Davies Liu
>             Fix For: 2.0.0
>
>
> Whole stage codegen is used by some modern MPP databases to archive great performance.
See http://www.vldb.org/pvldb/vol4/p539-neumann.pdf
> For Spark SQL, we can compile multiple operator into a single Java function to avoid
the overhead from materialize rows and Scala iterator.



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