Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/20208
**[Test build #92731 has
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/92731/testReport)**
for PR 20208 at commit
[`ebd239e`](https://github.com/apache/spark/commit/ebd239eab0aa2b03b211cd470eb33d5a538f594a).
* This patch **fails Spark unit tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:
* `trait SchemaEvolutionTest extends QueryTest with SQLTestUtils with
SharedSQLContext `
* `trait AddColumnEvolutionTest extends SchemaEvolutionTest `
* `trait HideColumnAtTheEndEvolutionTest extends SchemaEvolutionTest `
* `trait HideColumnInTheMiddleEvolutionTest extends SchemaEvolutionTest `
* `trait ChangePositionEvolutionTest extends SchemaEvolutionTest `
* `trait BooleanTypeEvolutionTest extends SchemaEvolutionTest `
* `trait ToStringTypeEvolutionTest extends SchemaEvolutionTest `
* `trait IntegralTypeEvolutionTest extends SchemaEvolutionTest `
* `trait ToDoubleTypeEvolutionTest extends SchemaEvolutionTest `
* `trait ToDecimalTypeEvolutionTest extends SchemaEvolutionTest `
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