Github user stanlyxiang commented on the issue: https://github.com/apache/incubator-hawq/pull/1143 Yes. This is for ranger support only. In our work, we avoid to confuse users with ranger and ranger-plugin. Because users should install ranger (apache ranger) before use HAWQ integration with Ranger. We should avoid the misleading that ranger has been installed&enabled if users configure hawq with option "enable-ranger". For the plugin folder, agree with you as Postgresql says "contrib directory include porting tools, analysis utilities, and plug-in features that are not part of the core PostgreSQL system". This part was committed by @denalex , we could discuss and file a jira to move if we reach a consensus.
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