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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2018/11/01 15:01:00 UTC
[jira] [Assigned] (SPARK-25892) AttributeReference.withMetadata
method should have return type AttributeReference
[ https://issues.apache.org/jira/browse/SPARK-25892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-25892:
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Assignee: (was: Apache Spark)
> 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
> Priority: Trivial
>
> 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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