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https://issues.apache.org/jira/browse/HIVE-13555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16642487#comment-16642487
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Ian Cook commented on HIVE-13555:
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Thanks Zoltan!
> Add nullif udf
> --------------
>
> Key: HIVE-13555
> URL: https://issues.apache.org/jira/browse/HIVE-13555
> Project: Hive
> Issue Type: Sub-task
> Components: UDF
> Reporter: Ashutosh Chauhan
> Assignee: Zoltan Haindrich
> Priority: Major
> Fix For: 2.3.0
>
> Attachments: HIVE-13555.1.patch, HIVE-13555.2.patch,
> HIVE-13555.2.patch
>
>
> {{nullif(exp1, exp2)}} is shorthand for: {{case when exp1 = exp2 then null
> else exp1}}
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