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For a more involved example, see this page.

As of Hive 0.13, you can register your function as a permanent UDF either in the current database or in a specified database, as described in Permanent Functions. For example:

create function my_db.my_lower as 'com.example.hive.udf.Lower';

Deploying Jars for User Defined Functions and User Defined SerDes

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