Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/19977
**[Test build #84987 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/84987/testReport)**
for PR 19977 at commit
[`2d3926e`](https://github.com/apache/spark/commit/2d3926e546b3aa60c46449151706941ed17e2441).
* This patch **fails SparkR unit tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:
* ` class FunctionArgumentConversion(conf: SQLConf) extends
TypeCoercionRule `
* `case class Concat(children: Seq[Expression], isBinaryMode: Boolean =
false)`
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