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https://issues.apache.org/jira/browse/SPARK-6367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust resolved SPARK-6367.
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Resolution: Fixed
Fix Version/s: 1.4.0
Issue resolved by pull request 5094
[https://github.com/apache/spark/pull/5094]
> Use the proper data type for those expressions that are hijacking existing
> data types.
> --------------------------------------------------------------------------------------
>
> Key: SPARK-6367
> URL: https://issues.apache.org/jira/browse/SPARK-6367
> Project: Spark
> Issue Type: Task
> Components: SQL
> Reporter: Yin Huai
> Assignee: Yin Huai
> Fix For: 1.4.0
>
>
> For the following expressions, the actual value type does not match the type
> of our internal representation.
> ApproxCountDistinctPartition
> NewSet
> AddItemToSet
> CombineSets
> CollectHashSet
> We should create UDTs for data types of these expressions.
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