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https://issues.apache.org/jira/browse/SPARK-5383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14290630#comment-14290630
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Apache Spark commented on SPARK-5383:
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User 'scwf' has created a pull request for this issue:
https://github.com/apache/spark/pull/4186
> support alias for udfs with multi output columns
> ------------------------------------------------
>
> Key: SPARK-5383
> URL: https://issues.apache.org/jira/browse/SPARK-5383
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.2.0
> Reporter: wangfei
>
> when a udf output multi columns, now we can not use alias for them in
> spark-sql, see this flowing sql:
> select stack(1, key, value, key, value) as (a, b, c, d) from src limit 5;
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