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https://issues.apache.org/jira/browse/SPARK-17657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-17657.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.1.0

Issue resolved by pull request 15230
[https://github.com/apache/spark/pull/15230]

> Disallow Users to Change Table Type 
> ------------------------------------
>
>                 Key: SPARK-17657
>                 URL: https://issues.apache.org/jira/browse/SPARK-17657
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.0.0, 2.1.0
>            Reporter: Xiao Li
>             Fix For: 2.1.0
>
>
> Hive allows users to change the table type from `Managed` to `External` or 
> from `External` to `Managed` by altering table's property `EXTERNAL`. See the 
> JIRA: https://issues.apache.org/jira/browse/HIVE-1329
> So far, Spark SQL does not correctly support it, although users can do it. 
> Many assumptions are broken in the implementation. Thus, this PR is to 
> disallow users to do it. 



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