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https://issues.apache.org/jira/browse/SPARK-21174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16058869#comment-16058869
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Apache Spark commented on SPARK-21174:
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User 'gengliangwang' has created a pull request for this issue:
https://github.com/apache/spark/pull/18387
> Validate sampling fraction in logical operator level
> ----------------------------------------------------
>
> Key: SPARK-21174
> URL: https://issues.apache.org/jira/browse/SPARK-21174
> Project: Spark
> Issue Type: Improvement
> Components: Optimizer
> Affects Versions: 2.2.0
> Reporter: Gengliang Wang
> Priority: Minor
>
> Currently the validation of sampling fraction in dataset is incomplete.
> As an improvement, validate sampling ratio in logical operator level:
> 1) if with replacement: ratio should be nonnegative
> 2) else: ratio should be on interval [0, 1]
> Also add test cases for the validation.
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