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https://issues.apache.org/jira/browse/HIVE-24369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Narayanan Venkateswaran reassigned HIVE-24369:
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> Implement projection spec for fetching only requested fields from tables
> ------------------------------------------------------------------------
>
> Key: HIVE-24369
> URL: https://issues.apache.org/jira/browse/HIVE-24369
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Reporter: Narayanan Venkateswaran
> Assignee: Narayanan Venkateswaran
> Priority: Minor
>
> Currently HMS APIs that return Table objects return fully populated Table
> objects. This object table is a bit heavy with all columns, their datatype
> info, storage descriptor, list of properties set etc. So an API that can
> fetch large amounts of tables, say 100k, they may not be able to retrieve all
> of them in a single call due to memory constraints.
>
> To improve performance of the API for callers, they can selectively turn on
> what fields on the Table object to populate on the returned objects via a
> projection spec.
>
> Something similar has already been done for partitions in HIVE-20306.
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