GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/8852
[SPARK-107321] [PYSPARK] [SQL] use 1 partition in take() of Python DataFrame
And optimize this special case (zero or one partition) in Limit, remove the
unnecessary shuffle.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark py_head
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8852.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 #8852
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commit 0c1d21f7330c195c446bdef0cfe2fa92a4cc4088
Author: Davies Liu <[email protected]>
Date: 2015-09-21T21:30:11Z
use 1 partition to do take()
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