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https://issues.apache.org/jira/browse/HIVE-1128?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zheng Shao updated HIVE-1128:
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Attachment: HIVE-1128.1.sh
HIVE-1128.1.patch
This patch adds new max/min functions which are capable of dealing with complex
types. It also moves the old UDAFMax/UDAFMin into contrib so that people can
take these as examples.
Please run "HIVE-1128.1.sh" before applying the patch HIVE-1128.1.patch to make
sure we can keep the svn log information for the moved files.
> Let max/min handle complex types like struct
> --------------------------------------------
>
> Key: HIVE-1128
> URL: https://issues.apache.org/jira/browse/HIVE-1128
> Project: Hadoop Hive
> Issue Type: Improvement
> Affects Versions: 0.6.0
> Reporter: Zheng Shao
> Assignee: Zheng Shao
> Attachments: HIVE-1128.1.patch, HIVE-1128.1.sh
>
>
> A lot of users are interested in doing "arg_min" and "arg_max". Basically,
> return the value of some other columns when one column's value is the max
> value.
> The following is an example usage when this is done:
> {code}
> SELECT department, max(struct(salary, employee_name))
> FROM compensations;
> {code}
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