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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2022/05/05 13:23:00 UTC

[jira] [Work logged] (HIVE-23391) Non blocking ALTER TABLE add column

     [ https://issues.apache.org/jira/browse/HIVE-23391?focusedWorklogId=766636&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-766636 ]

ASF GitHub Bot logged work on HIVE-23391:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 05/May/22 13:22
            Start Date: 05/May/22 13:22
    Worklog Time Spent: 10m 
      Work Description: deniskuzZ merged PR #3083:
URL: https://github.com/apache/hive/pull/3083




Issue Time Tracking
-------------------

    Worklog Id:     (was: 766636)
    Time Spent: 1h 10m  (was: 1h)

> Non blocking ALTER TABLE add column
> -----------------------------------
>
>                 Key: HIVE-23391
>                 URL: https://issues.apache.org/jira/browse/HIVE-23391
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: 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: 1h 10m
>  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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