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https://issues.apache.org/jira/browse/SPARK-25892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-25892.
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Resolution: Fixed
Fix Version/s: 3.0.0
Issue resolved by pull request 22918
[https://github.com/apache/spark/pull/22918]
> AttributeReference.withMetadata method should have return type
> AttributeReference
> ---------------------------------------------------------------------------------
>
> Key: SPARK-25892
> URL: https://issues.apache.org/jira/browse/SPARK-25892
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Jari Kujansuu
> Assignee: kevin yu
> Priority: Trivial
> Fix For: 3.0.0
>
>
> AttributeReference.withMetadata method should have return type
> AttributeReference instead of Attribute.
> AttributeReference overrides withMetadata method defined in Attribute super
> class and returns AttributeReference instance but method's return type is
> Attribute unlike in other with... methods overridden by AttributeReference.
> In some cases you have to cast the return value back to AttributeReference.
> For example if you want to modify metadata for AttributeReference in
> LogicalRelation you have to cast return value of withMetadata back to
> AttributeReference because LogicalRelation takes Seq[AttributeReference] as
> argument.
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