[jira] [Updated] (HIVE-22725) Lazy evaluate HiveMetastore::fireReadTablePreEvent table computation

["Rajesh Balamohan (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-22725?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rajesh Balamohan updated HIVE-22725:
------------------------------------
    Assignee: Rajesh Balamohan
      Status: Patch Available  (was: Open)

> Lazy evaluate HiveMetastore::fireReadTablePreEvent table computation
> --------------------------------------------------------------------
>
>                 Key: HIVE-22725
>                 URL: https://issues.apache.org/jira/browse/HIVE-22725
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Minor
>         Attachments: HIVE-22725.1.patch
>
>
> "TransactionalValidationListener" gets added in the pre-event listeners of HMS by default. 
> [https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java#L559]
> This causes issue in short select queries, as table details are computed for any partition lookups.
> [https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java#L4984]
> It would be good to lazy evaluate table lookup in this codepath.



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