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https://issues.apache.org/jira/browse/SPARK-17867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15564617#comment-15564617
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Apache Spark commented on SPARK-17867:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/15427
> Dataset.dropDuplicates (i.e. distinct) should consider the columns with same
> column name
> ----------------------------------------------------------------------------------------
>
> Key: SPARK-17867
> URL: https://issues.apache.org/jira/browse/SPARK-17867
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> We find and get the first resolved attribute from output with the given
> column name in Dataset.dropDuplicates. When we have the more than one columns
> with the same name. Other columns are put into aggregation columns, instead
> of grouping columns. We should fix this.
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