GitHub user rkarimi opened a pull request:
https://github.com/apache/spark/pull/16838
Branch 2.1
Fix Execution Plan:
Remove unnecessary steps of sort from execution plan:
df.sort(...).count()
It should not do the sort! It should be absolutely fast if underlying data
is partitioned with known count (such as parquet read).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/apache/spark branch-2.1
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16838.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 #16838
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