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Posted to issues@hive.apache.org by "Craig Condit (JIRA)" <ji...@apache.org> on 2019/04/18 20:39:00 UTC
[jira] [Assigned] (HIVE-21631) Enhance metastore API to allow
bulk-loading materialized views
[ https://issues.apache.org/jira/browse/HIVE-21631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Craig Condit reassigned HIVE-21631:
-----------------------------------
Assignee: Jesus Camacho Rodriguez
> Enhance metastore API to allow bulk-loading materialized views
> --------------------------------------------------------------
>
> Key: HIVE-21631
> URL: https://issues.apache.org/jira/browse/HIVE-21631
> Project: Hive
> Issue Type: Sub-task
> Components: Materialized views, Metastore
> Affects Versions: 3.2.0, 3.1.1
> Reporter: Craig Condit
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
>
> Currently, every query in HS2 results in a metastore call per database to retrieve all materialized views. This causes severe performance degradation on multi-tenant clusters with thousands of databases (very similar to how the old get_function() metastore call didn't scale).
> We should add a metastore call which can retrieve all materialized view definitions at once (for all DBs) so that we don't have to make thousands of metastore calls per query.
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