HyukjinKwon commented on a change in pull request #27991:
URL: https://github.com/apache/spark/pull/27991#discussion_r414266838
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File path:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala
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@@ -1532,6 +1532,13 @@ class DataFrameFunctionsSuite extends QueryTest with
SharedSparkSession {
assert(e.getMessage.contains("string, binary or array"))
}
+ test("SPARK-31227: Non-nullable null type should not coerce to nullable type
in concat") {
Review comment:
I believe those cases are tested in `CastSuite.scala` and
`TypeCoercionSuite.scala` including all types if I didn't miss anything. I just
kept one e2e test here since it was the reported case in the JIRA SPARK-31227.
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