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From "Eric Wohlstadter (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-19682) Provide option for GenericUDTFGetSplits to return only schema metadata
Date Mon, 28 May 2018 22:00:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-19682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Wohlstadter updated HIVE-19682:
------------------------------------
    Attachment: HIVE-19682.3.patch

> 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
>            Priority: Major
>         Attachments: HIVE-19682.1.patch, HIVE-19682.2.patch, HIVE-19682.3.patch
>
>
> 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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