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https://issues.apache.org/jira/browse/SPARK-19951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15971001#comment-15971001
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Takeshi Yamamuro commented on SPARK-19951:
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Since this operation is supported in PostgreSQL and MySQL, I think it's useful
for these users.
If you don't mind, I'll make a pr after branch-2.2 is cut.
https://github.com/apache/spark/compare/master...maropu:SPARK-19951
> Add string concatenate operator || to Spark SQL
> -----------------------------------------------
>
> Key: SPARK-19951
> URL: https://issues.apache.org/jira/browse/SPARK-19951
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Herman van Hovell
> Assignee: Herman van Hovell
> Priority: Minor
>
> It is quite natural to concatenate strings using the {||} symbol. For
> example: {{select a || b || c as abc from tbl_x}}. Let's add to Spark SQL.
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