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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