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https://issues.apache.org/jira/browse/SPARK-12579?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yin Huai resolved SPARK-12579.
------------------------------
Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 10519
[https://github.com/apache/spark/pull/10519]
> User-specified JDBC driver should always take precedence
> --------------------------------------------------------
>
> Key: SPARK-12579
> URL: https://issues.apache.org/jira/browse/SPARK-12579
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Fix For: 2.0.0
>
>
> Spark SQL's JDBC data source allows users to specify an explicit JDBC driver
> to load using the {{driver}} argument, but in the current code it's possible
> that the user-specified driver will not be used when it comes time to
> actually create a JDBC connection.
> In a nutshell, the problem is that you might have multiple JDBC drivers on
> your classpath that claim to be able to handle the same subprotocol and there
> doesn't seem to be an intuitive way to control which of those drivers takes
> precedence.
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