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https://issues.apache.org/jira/browse/SPARK-14004?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Cheng Lian resolved SPARK-14004.
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Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 11820
[https://github.com/apache/spark/pull/11820]
> AttributeReference and Alias should only use their first qualifier to build
> SQL representations
> -----------------------------------------------------------------------------------------------
>
> Key: SPARK-14004
> URL: https://issues.apache.org/jira/browse/SPARK-14004
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Cheng Lian
> Assignee: Cheng Lian
> Priority: Minor
> Fix For: 2.0.0
>
>
> Current implementation joins all qualifiers, which is wrong.
> However, this doesn't cause any real SQL generation bugs as there is always
> at most one qualifier for any given {{AttributeReference}} or {{Alias}}.
> We can probably use {{Option\[String\]}} instead of {{Seq\[String\]}} to
> represent qualifiers.
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