GitHub user maropu opened a pull request:
https://github.com/apache/spark/pull/14800
[SPARK-15382][SQL] Fix a bug in sampling with replacement
## What changes were proposed in this pull request?
This pr to fix a bug below in sampling with replacement
```
val df = Seq((1, 0), (2, 0), (3, 0)).toDF("a", "b")
df.sample(true, 2.0).withColumn("c",
monotonically_increasing_id).select($"c").show
+---+
| c|
+---+
| 0|
| 1|
| 1|
| 1|
| 2|
+---+
```
## How was this patch tested?
Added a test in `DataFrameSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/maropu/spark FixSampleBug
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14800.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 #14800
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