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https://issues.apache.org/jira/browse/HIVE-22669?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ouchengeng reassigned HIVE-22669:
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> Do not initiate Deserializer for DescTable operation when it's not needed
> -------------------------------------------------------------------------
>
> Key: HIVE-22669
> URL: https://issues.apache.org/jira/browse/HIVE-22669
> Project: Hive
> Issue Type: Improvement
> Components: Clients, Hive
> Affects Versions: 3.0.0
> Reporter: ouchengeng
> Assignee: ouchengeng
> Priority: Major
>
> For `desc table ` queries, DescTableOperation always creates a Deserializer
> object, even though it's not often needed.
> What often is that if a table is backed on some particular SerDe class, uses
> have no chance to `desc table` without adding that jar file. With this patch,
> users at least are able to desc tables when they only need metadata of the
> table, especially in an open Hive environment.
> For above two reasons, it's better to create Deserializer object when it's
> needed.
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