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Posted to issues@spark.apache.org by "Liang-Chi Hsieh (JIRA)" <ji...@apache.org> on 2015/08/16 11:54:45 UTC

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

Liang-Chi Hsieh created SPARK-10031:
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             Summary: 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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