[jira] [Updated] (HIVE-23496) Add a flag to disable DB scan during Hive Server startup

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-23496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HIVE-23496:
----------------------------------
    Labels: pull-request-available  (was: )

> Add a flag to disable DB scan during Hive Server startup
> --------------------------------------------------------
>
>                 Key: HIVE-23496
>                 URL: https://issues.apache.org/jira/browse/HIVE-23496
>             Project: Hive
>          Issue Type: New Feature
>          Components: HiveServer2
>    Affects Versions: 2.3.7
>            Reporter: David Rabinowitz
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> At start-up, HiveServer2 will do a full DB & Table scan. For large Hive Metastores, this operation could take 10+ minutes to complete. The goal of this task is to make this “verification” optional if possible.
> Currently, Hive 2.3.7 has the following in [HiveMaterializedViewsRegistry|https://github.com/apache/hive/blob/rel/release-2.3.6/ql/src/java/org/apache/hadoop/hive/ql/metadata/HiveMaterializedViewsRegistry.java#L124-L127] that is causing this behavior.
>  
> {code:java}
> for (String dbName : db.getAllDatabases()) {
>   // TODO: We should enhance metastore API such that it returns only
>   // materialized views instead of all tables
>   tables.addAll(db.getAllTableObjects(dbName));
> }
> {code}
> It seems that <= Hive 2.3.x && >= Hive 3.0 *does not* have this behavior.
>  



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