cloud-fan commented on a change in pull request #32972:
URL: https://github.com/apache/spark/pull/32972#discussion_r661252473
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File path:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameSetOperationsSuite.scala
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@@ -922,12 +922,67 @@ class DataFrameSetOperationsSuite extends QueryTest with
SharedSparkSession {
}
}
}
+
+ test("SPARK-35756: unionByName support struct having same col names but
different sequence") {
+ // struct having same col names but different sequence
+ var df1 = Seq((1, Struct1(1, 2))).toDF("a", "b")
+ var df2 = Seq((1, Struct2(1, 2))).toDF("a", "b")
+ var unionDF = df1.unionByName(df2)
+ var expected = Row(1, Row(1, 2)) :: Row(1, Row(2, 1)) :: Nil
+ val schema = "`a` INT,`b` STRUCT<`c1`: INT, `c2`: INT>"
+ assert(unionDF.schema.toDDL === schema)
Review comment:
It's a bit fragile to compare the DDL string, can we compare
`StructType` instance directly?
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