[
https://issues.apache.org/jira/browse/HIVE-5731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13818289#comment-13818289
]
Edward Capriolo commented on HIVE-5731:
---------------------------------------
{quote}
GenericUDF class is the latest and recommended base class for any UDFs.
This JIRA is to change the current UDFDate* classes extended from GenericUDF.
{quote}
Had anyone done performance evaluation on the speed of a UDF vs a generic UDF.
I understand the motivation in the vectorized case, but are users of the
non-vectorized case getting less performance. If I knew the performance was
negligible I would not care, but I have not seen any numbers and I am wondering
if we have considered the implications of this.
> Use new GenericUDF instead of basic UDF for UDFDate* classes
> -------------------------------------------------------------
>
> Key: HIVE-5731
> URL: https://issues.apache.org/jira/browse/HIVE-5731
> Project: Hive
> Issue Type: Improvement
> Reporter: Mohammad Kamrul Islam
> Assignee: Mohammad Kamrul Islam
> Attachments: HIVE-5731.1.patch, HIVE-5731.2.patch, HIVE-5731.3.patch,
> HIVE-5731.4.patch
>
>
> 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."
--
This message was sent by Atlassian JIRA
(v6.1#6144)
