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_r351430247
##########
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:
Interesting. When appending to the table, Spark does not check compatibility
on write, when using Delta this is the case.
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