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https://issues.apache.org/jira/browse/SPARK-14253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15217044#comment-15217044
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Liang-Chi Hsieh commented on SPARK-14253:
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I already add this support in https://github.com/apache/spark/pull/12036.
> Avoid registering temporary functions in Hive
> ---------------------------------------------
>
> Key: SPARK-14253
> URL: https://issues.apache.org/jira/browse/SPARK-14253
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Andrew Or
> Assignee: Andrew Or
>
> Spark should just handle all temporary functions ourselves instead of passing
> it to Hive, which is what the HiveFunctionRegistry does at the moment. The
> extra call to Hive is unnecessary and potentially slow, and it makes the
> semantics of a "temporary function" confusing.
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