[HIVE-5731] Use new GenericUDF instead of basic UDF for UDFDate* classes

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.13.0
• Assignee: Mohammad Islam
• Reporter: Mohammad Islam
• Created: 02/Nov/13 01:39
• Updated: 24/Nov/15 01:22
• Resolved: 25/Dec/13 22:56

Description

GenericUDF class is the latest and recommended base class for any UDFs.
This JIRA is to change the current UDFDate* classes extended from GenericUDF.

The general benefit of GenericUDF is described in comments as

"* The GenericUDF are superior to normal UDFs in the following ways: 1. It can

accept arguments of complex types, and return complex types. 2. It can accept
variable length of arguments. 3. It can accept an infinite number of function
signature - for example, it's easy to write a GenericUDF that accepts
array<int>, array<array<int>> and so on (arbitrary levels of nesting). 4. It
can do short-circuit evaluations using DeferedObject."

Issue Links

• relates to: HIVE-12502 to_date UDF cannot accept NULLs of VOID type