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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/06/02 01:25:00 UTC
[jira] [Commented] (SPARK-35604) Fix condition check for FULL OUTER
sort merge join
[ https://issues.apache.org/jira/browse/SPARK-35604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17355428#comment-17355428 ]
Apache Spark commented on SPARK-35604:
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User 'c21' has created a pull request for this issue:
https://github.com/apache/spark/pull/32736
> Fix condition check for FULL OUTER sort merge join
> --------------------------------------------------
>
> Key: SPARK-35604
> URL: https://issues.apache.org/jira/browse/SPARK-35604
> Project: Spark
> Issue Type: Documentation
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Cheng Su
> Priority: Minor
>
> The condition check for FULL OUTER sort merge join ([https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala#L1368] ) has unnecessary trip when `leftIndex == leftMatches.size` or `rightIndex == rightMatches.size`. Though this does not affect correctness (`scanNextInBuffered()` returns false anyway).
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