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From "Paul Yang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-554) Add GenericUDF to create arrays, maps, and structs
Date Tue, 03 Nov 2009 03:01:59 GMT

    [ https://issues.apache.org/jira/browse/HIVE-554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12772853#action_12772853
] 

Paul Yang commented on HIVE-554:
--------------------------------

It seems that the SerDe's use SerDeUtils.buildJSONString() to get the display string. I could
change it there, but then the output would no longer be in JSON. If there were anything that
depended on the JSON format, this change would break it as well. 

Perhaps we should keep it the way it is?

> Add GenericUDF to create arrays, maps, and structs
> --------------------------------------------------
>
>                 Key: HIVE-554
>                 URL: https://issues.apache.org/jira/browse/HIVE-554
>             Project: Hadoop Hive
>          Issue Type: New Feature
>            Reporter: Zheng Shao
>            Assignee: Paul Yang
>         Attachments: HIVE-554.1.patch
>
>
> Here is an example:
> {code}
> SELECT array(1,2,3)[3], map("a":1,"b":2,"c":3)["a"], struct(user_id:3, revenue: sum(rev))
> FROM table
> GROUP BY user_id;
> {code}
> This is relatively easy to do with the GenericUDF framework, and will greatly increase
the flexibility of the language.

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