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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/08/16 11:56:45 UTC

[jira] [Commented] (SPARK-10031) Join two UnsafeRows in SortMergeJoin if possible

    [ https://issues.apache.org/jira/browse/SPARK-10031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698609#comment-14698609 ] 

Apache Spark commented on SPARK-10031:
--------------------------------------

User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/8226

> Join two UnsafeRows in SortMergeJoin if possible
> ------------------------------------------------
>
>                 Key: SPARK-10031
>                 URL: https://issues.apache.org/jira/browse/SPARK-10031
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Liang-Chi Hsieh
>
> Currently in SortMergeJoin, when two rows from left and right plans are both UnsafeRow, we still use JoinedRow to join them and do an extra UnsafeProjection later.
> We can just use GenerateUnsafeRowJoiner to join two UnsafeRows in SortMergeJoin if possible. Besides, GenerateUnsafeRowJoiner can have a withRight function to only update row2 with a same row1.



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