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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/03/09 13:58:00 UTC
[jira] [Work logged] (HIVE-23391) Change requested lock for ALTER
TABLE ADD COLUMN to DDL_SHARED
[ https://issues.apache.org/jira/browse/HIVE-23391?focusedWorklogId=563074&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-563074 ]
ASF GitHub Bot logged work on HIVE-23391:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 09/Mar/21 13:57
Start Date: 09/Mar/21 13:57
Worklog Time Spent: 10m
Work Description: zchovan commented on pull request #2054:
URL: https://github.com/apache/hive/pull/2054#issuecomment-793932193
cc @deniskuzZ
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Issue Time Tracking
-------------------
Worklog Id: (was: 563074)
Time Spent: 20m (was: 10m)
> Change requested lock for ALTER TABLE ADD COLUMN to DDL_SHARED
> --------------------------------------------------------------
>
> Key: HIVE-23391
> URL: https://issues.apache.org/jira/browse/HIVE-23391
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Chovan
> Assignee: Zoltan Chovan
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-23391.2.patch, HIVE-23391.3.patch, HIVE-23391.4.patch, HIVE-23391.patch
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> A long running query can block a simple add column query, as the add column will require a DDL_EXCLUSIVE lock currently. By changing this to a shared lock, this metadata only query can be executed without having to wait for the previous query to finish.
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