Fokko commented on a change in pull request #26644: [SPARK-30004][SQL] Allow
merge UserDefinedType into a native DataType
URL: https://github.com/apache/spark/pull/26644#discussion_r352771008
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
##########
@@ -287,4 +293,63 @@ class UserDefinedTypeSuite extends QueryTest with
SharedSparkSession with Parque
checkAnswer(spark.createDataFrame(data, schema).selectExpr("typeof(a)"),
Seq(Row("array<double>")))
}
+
+ test("Allow merge UserDefinedType into a native DataType") {
Review comment:
@maropu I'm unable to reproduce the issue without Delta. Since plan Spark
does not check schema compatibility on write, I'm unable to implement an end to
end integration test. I tried to fix this by taking the union of the two DF's,
but this took another branch in the codebase, and it failed on `TypeCoercion`.
Please advise.
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