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From "Reynold Xin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-24010) Select from table needs read access on DB folder when storage based auth is enabled
Date Wed, 18 Apr 2018 16:35:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-24010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16442802#comment-16442802
] 

Reynold Xin commented on SPARK-24010:
-------------------------------------

It's better to throw an error message to tell the user the db doesn't exist, rather than the
table. Also other catalog implementations in the future might not support this.

 

> Select from table needs read access on DB folder when storage based auth is enabled
> -----------------------------------------------------------------------------------
>
>                 Key: SPARK-24010
>                 URL: https://issues.apache.org/jira/browse/SPARK-24010
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: Rui Li
>            Priority: Major
>
> When HMS enables storage based authorization, SparkSQL requires read access on DB folder
in order to select from a table. Such requirement doesn't seem necessary and is not required
in Hive.
> The reason is when Analyzer tries to resolve a relation, it calls [SessionCatalog::databaseExists|https://github.com/apache/spark/blob/v2.1.0/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala#L469].
This will call the metastore get_database API which will perform authorization check.



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