GitHub user yucai opened a pull request:
https://github.com/apache/spark/pull/21156
[SPARK-24087][SQL] Avoid shuffle when join keys are a super-set of bucket
keys
## What changes were proposed in this pull request?
To improve the bucket join, when join keys are a super-set of bucket keys,
we should avoid shuffle.
## How was this patch tested?
Enable ignored test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yucai/spark SPARK-24087
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21156.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 #21156
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