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https://issues.apache.org/jira/browse/SPARK-17680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15571425#comment-15571425
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Apache Spark commented on SPARK-17680:
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User 'kiszk' has created a pull request for this issue:
https://github.com/apache/spark/pull/15462

> Unicode Character Support for Column Names and Comments
> -------------------------------------------------------
>
>                 Key: SPARK-17680
>                 URL: https://issues.apache.org/jira/browse/SPARK-17680
>             Project: Spark
>          Issue Type: Test
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: Xiao Li
>
> Spark SQL supports Unicode characters for column names when specified within 
> backticks(`). When the Hive support is enabled, the version of the Hive 
> metastore must be higher than 0.12, See the JIRA: 
> https://issues.apache.org/jira/browse/HIVE-6013 Hive metastore supports 
> Unicode characters for column names since 0.13.
> In Spark SQL, table comments, and view comments always allow Unicode 
> characters without backticks.



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