Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/21736
**[Test build #92753 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/92753/testReport)**
for PR 21736 at commit
[`5114269`](https://github.com/apache/spark/commit/5114269187f0d96d57440ba40efbff9ee9b7fc94).
* This patch **fails Spark unit tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:
* `case class Size(child: Expression) extends UnaryExpression with
ExpectsInputTypes `
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