[jira] [Commented] (SPARK-16189) Add ExistingRDD logical plan for input with RDD to have a chance to eliminate serialize/deserialize.

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

    [ https://issues.apache.org/jira/browse/SPARK-16189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15348071#comment-15348071 ] 

Apache Spark commented on SPARK-16189:
--------------------------------------

User 'ueshin' has created a pull request for this issue:
https://github.com/apache/spark/pull/13890

> Add ExistingRDD logical plan for input with RDD to have a chance to eliminate serialize/deserialize.
> ----------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-16189
>                 URL: https://issues.apache.org/jira/browse/SPARK-16189
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Takuya Ueshin
>
> Currently the input {{RDD}} of {{Dataset}} is always serialized to {{RDD\[InternalRow\]}} prior to being as {{Dataset}}, but there is a case that we use {{map}} or {{mapPartitions}} just after converted to {{Dataset}}.
> In this case, serialize and then deserialize happens but it would not be needed.
> This patch adds {{ExistingRDD}} logical plan for input with {{RDD}} to have a chance to eliminate serialize/deserialize.



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