enhance PDK with validation and utility functions
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Key: HIVE-2524
URL: https://issues.apache.org/jira/browse/HIVE-2524
Project: Hive
Issue Type: Improvement
Components: UDF
Reporter: John Sichi
Assignee: Marek Sapota
Fix For: 0.9.0
Writing a robust UDF implementation requires a lot of boilerplate code such as
argument type checking. We should add utility libraries to make UDF's easier
to write.
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