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https://issues.apache.org/jira/browse/SPARK-17680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15707629#comment-15707629
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Kazuaki Ishizaki commented on SPARK-17680:
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Sorry, it is my mistake.
> 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
> Assignee: Xiao Li
> Fix For: 2.1.0
>
>
> 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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