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https://issues.apache.org/jira/browse/HIVE-19682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16489979#comment-16489979
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Prasanth Jayachandran commented on HIVE-19682:
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The 2nd int argument looks unused. Maybe we should remove it altogether? Or use
that int as enum equivalent? enum ordinal 0 is GET_SCHEMA, >0 will be unused
for now (can be used for other support in future).
> 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
>
>
> 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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