Alex Liu created SPARK-17767:
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             Summary: Spark SQL ExternalCatalog API custom implementation 
support
                 Key: SPARK-17767
                 URL: https://issues.apache.org/jira/browse/SPARK-17767
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.0.0
            Reporter: Alex Liu


There is no way/easy way to configure Spark to use customized ExternalCatalog.  
Internal source code is hardcoded to use either hive or in-memory metastore. 
Spark SQL thriftserver is hardcoded to use HiveExternalCatalog. We should be 
able to create a custom external catalog and thriftserver should be able to use 
it. Potentially Spark SQL thriftserver shouldn't depend on Hive thriftserer.





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