Austin Lee created HIVE-12679:
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             Summary: Allow users to be able to specify an implementation of 
IMetaStoreClient via HiveConf
                 Key: HIVE-12679
                 URL: https://issues.apache.org/jira/browse/HIVE-12679
             Project: Hive
          Issue Type: Improvement
          Components: Configuration, Metastore, Query Planning
            Reporter: Austin Lee
            Assignee: Austin Lee
            Priority: Minor


Hi,

I would like to propose a change that would make it possible for users to 
choose an implementation of IMetaStoreClient via HiveConf, i.e. hive-site.xml.  
Currently, in Hive the choice is hard coded to be SessionHiveMetaStoreClient in 
org.apache.hadoop.hive.ql.metadata.Hive.  There is no other direct reference to 
SessionHiveMetaStoreClient other than the hard coded class name in Hive.java 
and the QL component operates only on the IMetaStoreClient interface so the 
change would be minimal and it would be quite similar to how an implementation 
of RawStore is specified and loaded in hive-metastore.  One use case this 
change would serve would be one where a user wishes to use an implementation of 
this interface without the dependency on the Thrift server.
  
Thank you,
Austin



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