Alan Gates created HIVE-18685:

             Summary: Add catalogs to metastore
                 Key: HIVE-18685
             Project: Hive
          Issue Type: New Feature
          Components: Metastore
    Affects Versions: 3.0.0
            Reporter: Alan Gates
            Assignee: Alan Gates
         Attachments: HMS Catalog Design Doc.pdf

SQL supports two levels of namespaces, called in the spec catalogs and schemas 
(with schema being equivalent to Hive's database).  I propose to add the upper 
level of catalog.  The attached design doc covers the use cases, requirements, 
and brief discussion of how it will be implemented in a backwards compatible 

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