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https://issues.apache.org/jira/browse/HIVE-23496?focusedWorklogId=435120&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-435120
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ASF GitHub Bot logged work on HIVE-23496:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 19/May/20 18:57
Start Date: 19/May/20 18:57
Worklog Time Spent: 10m
Work Description: davidrabinowitz opened a new pull request #1027:
URL: https://github.com/apache/hive/pull/1027
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.
It seems that <= Hive 2.3.x && >= Hive 3.0 *does not* have this behavior.
This changes introduces a new flag,
`hive.server2.materializedviews.cache.at.startup` that by setting it to false
the cache warmup is disabled.
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Issue Time Tracking
-------------------
Worklog Id: (was: 435120)
Remaining Estimate: 0h
Time Spent: 10m
> 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
> 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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