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Posted to dev@hive.apache.org by "Prasad Chakka (JIRA)" <ji...@apache.org> on 2009/06/04 03:36:07 UTC
[jira] Commented: (HIVE-470) Support COALESCE using GenericUDF
[ https://issues.apache.org/jira/browse/HIVE-470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12716123#action_12716123 ]
Prasad Chakka commented on HIVE-470:
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i don't see a test for all NULL args for COALESCE. MySQL supports that.
> Support COALESCE using GenericUDF
> ---------------------------------
>
> Key: HIVE-470
> URL: https://issues.apache.org/jira/browse/HIVE-470
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Query Processor
> Affects Versions: 0.4.0
> Reporter: Zheng Shao
> Assignee: Zheng Shao
> Attachments: HIVE-470.1.patch
>
>
> See HIVE-164 for details. We should support COALESCE which is defined in SQL-92. This is kind of a syntax sugar, but it is used very frequently in full outer joins.
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