GitHub user rxin opened a pull request:
https://github.com/apache/spark/pull/18988
[SPARK-21778][SQL] Simpler Dataset.sample API in Scala / Java
## What changes were proposed in this pull request?
Dataset.sample requires a boolean flag withReplacement as the first
argument. However, most of the time users simply want to sample some records
without replacement. This ticket introduces a new sample function that simply
takes in the fraction and seed.
## How was this patch tested?
Tested manually. Not sure yet if we should add a test case for just this
wrapper ...
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rxin/spark SPARK-21778
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18988.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 #18988
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commit a21d8b07a130fc47e76a96935f272cb720ff1250
Author: Reynold Xin <[email protected]>
Date: 2017-08-18T04:45:16Z
[SPARK-21778][SQL] Simpler Dataset.sample API in Scala / Java
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