ulysses-you commented on code in PR #40154:
URL: https://github.com/apache/spark/pull/40154#discussion_r1116473338
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sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercionSuite.scala:
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@@ -1740,6 +1741,16 @@ class TypeCoercionSuite extends TypeCoercionSuiteBase {
}
}
}
+
+ test("SPARK-32638: Add PlainReferences to skip rewriting attributes") {
+ val t1 = LocalRelation(AttributeReference("c", DecimalType(1, 0))())
+ val t2 = LocalRelation(AttributeReference("c", DecimalType(2, 0))())
+ val unresolved = t1.union(t2).select(UnresolvedStar(None))
+ val plainReferences = FakePlainReferences(unresolved)
+ val wp1 = widenSetOperationTypes(plainReferences.select(t1.output.head))
Review Comment:
before, it would throw
`org.apache.spark.sql.catalyst.analysis.UnresolvedException: Invalid call to
toAttribute on unresolved object`
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