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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2016/03/04 00:46:18 UTC

[jira] [Created] (SPARK-13661) Avoid the copy of UnsafeRow in HashedRelation

Davies Liu created SPARK-13661:
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             Summary: Avoid the copy of UnsafeRow in HashedRelation
                 Key: SPARK-13661
                 URL: https://issues.apache.org/jira/browse/SPARK-13661
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Davies Liu


We usually build the HashedRelation on top of array of UnsafeRow, the copy could be avoided.

The caller of HashedRelation need to do the copy if it's needed.

Another approach could be making the copy() of UnsafeRow smart so that it know when should copy the bytes or not, this could be also useful for other components. 



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