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https://issues.apache.org/jira/browse/SPARK-32828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17192698#comment-17192698
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Apache Spark commented on SPARK-32828:
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User 'maropu' has created a pull request for this issue:
https://github.com/apache/spark/pull/29691
> Cast from a derived user-defined type to a base type
> ----------------------------------------------------
>
> Key: SPARK-32828
> URL: https://issues.apache.org/jira/browse/SPARK-32828
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.0, 3.0.2
> Reporter: Takeshi Yamamuro
> Priority: Minor
>
> This ticket targets at fixing an existing bug below in
> `UserDefinedTypeSuite`;This PR intends to fix a existing bug below in
> `UserDefinedTypeSuite`;
> {code:java}
> [info] - SPARK-19311: UDFs disregard UDT type hierarchy (931
> milliseconds)16:22:35.936 WARN
> org.apache.spark.sql.catalyst.expressions.SafeProjection: Expr codegen error
> and falling back to interpreter modeorg.apache.spark.SparkException: Cannot
> cast org.apache.spark.sql.ExampleSubTypeUDT@46b1771f to
> org.apache.spark.sql.ExampleBaseTypeUDT@31e8d979. at
> org.apache.spark.sql.catalyst.expressions.CastBase.nullSafeCastFunction(Cast.scala:891)
> at
> org.apache.spark.sql.catalyst.expressions.CastBase.doGenCode(Cast.scala:852)
> at
> org.apache.spark.sql.catalyst.expressions.Expression.$anonfun$genCode$3(Expression.scala:147)
> ...{code}
>
>
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