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https://issues.apache.org/jira/browse/HIVE-14580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15599106#comment-15599106
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Lefty Leverenz commented on HIVE-14580:
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Also, [~kgyrtkirk] wrote on Oct. 4:
* note: i think this precedence table should be documented somewhere
> Introduce || operator
> ---------------------
>
> Key: HIVE-14580
> URL: https://issues.apache.org/jira/browse/HIVE-14580
> Project: Hive
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Ashutosh Chauhan
> Assignee: Zoltan Haindrich
> Labels: TODOC2.2
> Fix For: 2.2.0
>
> Attachments: HIVE-14580.1.patch, HIVE-14580.2.patch,
> HIVE-14580.3.patch, HIVE-14580.4.patch
>
>
> Functionally equivalent to concat() udf. But standard allows usage of || for
> string concatenations.
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