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https://issues.apache.org/jira/browse/HADOOP-4266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zheng Shao resolved HADOOP-4266.
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Resolution: Fixed
Fixed as part of JIRA-4230
> Hive: Support "IS NULL", "IS NOT NULL", and size(x) for map and list
> --------------------------------------------------------------------
>
> Key: HADOOP-4266
> URL: https://issues.apache.org/jira/browse/HADOOP-4266
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/hive
> Reporter: Zheng Shao
> Assignee: Zheng Shao
>
> We should add UDFs to tell whether a map/list is null or not, and the size of
> a map/list.
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