GitHub user kiszk opened a pull request:
https://github.com/apache/spark/pull/19937
[SPARK-22746][SQL] Avoid the generation of useless mutable states by
SortMergeJoin
## What changes were proposed in this pull request?
This PR reduce the number of global mutable variables in generated code of
`SortMergeJoin`.
## How was this patch tested?
Existing test cases
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kiszk/spark SPARK-22746
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19937.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #19937
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commit 6d489248f4b2c2e5b40f51524e21992a59226ae8
Author: Kazuaki Ishizaki <ishiz...@jp.ibm.com>
Date: 2017-12-09T15:27:24Z
initial commit
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