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https://issues.apache.org/jira/browse/SPARK-25085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16577219#comment-16577219
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Apache Spark commented on SPARK-25085:
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User 'wangyum' has created a pull request for this issue:
https://github.com/apache/spark/pull/22078
> Insert overwrite a non-partitioned table can delete table folder
> ----------------------------------------------------------------
>
> Key: SPARK-25085
> URL: https://issues.apache.org/jira/browse/SPARK-25085
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Rui Li
> Priority: Major
>
> When inserting overwrite a data source table, Spark firstly deletes all the
> partitions. For non-partitioned table, it will delete the table folder, which
> is wrong because table folder may contain information like ACL entries.
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