[
https://issues.apache.org/jira/browse/HIVE-23282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ashutosh Chauhan updated HIVE-23282:
------------------------------------
Fix Version/s: 4.0.0
Resolution: Fixed
Status: Resolved (was: Patch Available)
Pushed to master. Thanks, Attila!
> Reduce number of DB calls in ObjectStore::getPartitionsByExprInternal
> ---------------------------------------------------------------------
>
> Key: HIVE-23282
> URL: https://issues.apache.org/jira/browse/HIVE-23282
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Rajesh Balamohan
> Assignee: Attila Magyar
> Priority: Major
> Fix For: 4.0.0
>
> Attachments: HIVE-23282.1.patch, HIVE-23282.3.patch,
> HIVE-23282.5.patch, HIVE-23282.6.patch, HIVE-23282.7.patch,
> HIVE-23282.8.patch, image-2020-04-23-14-07-06-077.png
>
>
> ObjectStore::getPartitionsByExprInternal internally uses Table information
> for getting partitionKeys, table, catalog name.
>
> For this, it ends up populating entire table data from DB (including skew
> column, parameters, sort, bucket cols etc). This makes it a lot more
> expensive call. It would be good to check if MTable itself can be used
> instead of Table.
> [https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java#L3327]
> [https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java#L3669]
>
> !image-2020-04-23-14-07-06-077.png|width=665,height=592!
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
