Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/17920
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GitHub user wangyum opened a pull request:
https://github.com/apache/spark/pull/17920
[SPARK-17685][SQL] Make SortMergeJoinExec's currentVars is null when
calling createJoinKey
## What changes were proposed in this pull request?
The following SQL query cause `IndexOutOfBoun
