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https://issues.apache.org/jira/browse/SPARK-8658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14949946#comment-14949946
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Xiao Li commented on SPARK-8658:
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Hi, Michael and Antonio,
Trying to understand the problem and fix it if I can. Expression ID is the same
but their qualifiers are different???
Could you give a query sample? I am trying to reproduce the problem? Is this
problem related to a self join?
Thanks,
Xiao Li
> AttributeReference equals method only compare name, exprId and dataType
> -----------------------------------------------------------------------
>
> Key: SPARK-8658
> URL: https://issues.apache.org/jira/browse/SPARK-8658
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.3.0, 1.3.1, 1.4.0
> Reporter: Antonio Jesus Navarro
>
> The AttributeReference "equals" method only accept as different objects with
> different name, expression id or dataType. With this behavior when I tried to
> do a "transformExpressionsDown" and try to transform qualifiers inside
> "AttributeReferences", these objects are not replaced, because the
> transformer considers them equal.
> I propose to add to the "equals" method this variables:
> name, dataType, nullable, metadata, epxrId, qualifiers
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