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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-554) Add GenericUDF to create arrays, maps, and structs
Date Wed, 10 Jun 2009 06:13:07 GMT
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


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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