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https://issues.apache.org/jira/browse/HIVE-6107?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13857789#comment-13857789
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Brock Noland commented on HIVE-6107:
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Hi,
Sorry, I should have been more clear. The comment I left was meant for other
Hive committers. Long story short there is a lot of context regarding teradata
+ the other UDF that is not public.
Therefore when implementing UDFs based on a commercial system like Oracle, we
should do some work to ensure the udf name and functionality are not Oracle IP
before committing this change.
> Introduce nvl2 UDF similar to Oracle
> ------------------------------------
>
> Key: HIVE-6107
> URL: https://issues.apache.org/jira/browse/HIVE-6107
> Project: Hive
> Issue Type: New Feature
> Components: UDF
> Reporter: Kostiantyn Kudriavtsev
> Priority: Minor
> Attachments: hive-6107.patch
>
>
> Introduce new UDF:
> nvl2 : extends the functionality found in the NVL function. It lets you
> substitutes a value when a null value is encountered as well as when a
> non-null value is encountered.
> NVL2( string1, value_if_NOT_null, value_if_null )
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