[jira] [Created] (HIVE-19682) Provide option for GenericUDTFGetSplits to return only schema metadata

["Eric Wohlstadter (JIRA)" <ji...@apache.org>]

Eric Wohlstadter created HIVE-19682:
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             Summary: Provide option for GenericUDTFGetSplits to return only schema metadata
                 Key: HIVE-19682
                 URL: https://issues.apache.org/jira/browse/HIVE-19682
             Project: Hive
          Issue Type: Improvement
            Reporter: Eric Wohlstadter
            Assignee: Eric Wohlstadter


For some uses cases it is necessary to know the output schema for a HiveQL before executing the query. But there is no existing client API that provides this information.

Hive JDBC doesn't provide the schema for parametric types in {{ResultSetMetaData}}.

GenericUDTFGetSplits bundles the proper schema metadata with the fragments for input splits. An option can be added to return only the schema metadata from compilation, and the generation of input splits can be skipped.





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