Document GenericUD(A|T)F
------------------------
Key: HIVE-2085
URL: https://issues.apache.org/jira/browse/HIVE-2085
Project: Hive
Issue Type: Improvement
Components: Documentation
Reporter: Lars Francke
Priority: Minor
GenericUDFs are very poorly documented, this includes everything they relate to:
* ObjectInspector (JavaDoc not really helpful for someone not familiar with
Hive)
* ObjectInspectorFactory
* ObjectInspectorConverters
* ...
An example would help as well as a unit test for one of the built in
GenericUDFs. Writing a normal UDF is pretty well documented but GenericUDFs
(and UDTF/UDAF) require more knowledge about the inner workings of Hive and
that could be documented better.
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