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From "Paul Yang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-554) Add GenericUDF to create arrays, maps, and structs
Date Sat, 17 Oct 2009 01:57:31 GMT

     [ https://issues.apache.org/jira/browse/HIVE-554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Paul Yang updated HIVE-554:
---------------------------

    Attachment: HIVE-554.1.patch

* Added UDF's array() and map() along with respective tests

* When constructing empty arrays and maps, a string Object Inspector is used in initialization.


> 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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