[ 
https://issues.apache.org/jira/browse/HIVE-23721?focusedWorklogId=453816&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-453816
 ]

ASF GitHub Bot logged work on HIVE-23721:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 02/Jul/20 07:47
            Start Date: 02/Jul/20 07:47
    Worklog Time Spent: 10m 
      Work Description: butaozhang opened a new pull request #1202:
URL: https://github.com/apache/hive/pull/1202


   ## NOTICE
   
   Please create an issue in ASF JIRA before opening a pull request,
   and you need to set the title of the pull request which starts with
   the corresponding JIRA issue number. (e.g. HIVE-XXXXX: Fix a typo in YYY)
   For more details, please see 
https://cwiki.apache.org/confluence/display/Hive/HowToContribute
   


----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

For queries about this service, please contact Infrastructure at:
us...@infra.apache.org


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

            Worklog Id:     (was: 453816)
    Remaining Estimate: 0h
            Time Spent: 10m

> MetaStoreDirectSql.ensureDbInit() need to optimize QuerySQL
> -----------------------------------------------------------
>
>                 Key: HIVE-23721
>                 URL: https://issues.apache.org/jira/browse/HIVE-23721
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 3.1.2
>         Environment: Hadoop 3.1(1700+ nodes)
> YARN 3.1 (with timelineserver enabled,https enabled)
> Hive 3.1 (15 HS2 instance)
> 60000+ YARN Applications every day
>            Reporter: YulongZ
>            Assignee: zhangbutao
>            Priority: Critical
>             Fix For: 4.0.0
>
>         Attachments: HIVE-23721.01.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> From Hive3.0,catalog added to hivemeta,many schema of metastore added column 
> “catName”,and index for table added column “catName”。
> In MetaStoreDirectSql.ensureDbInit() ,two queries below
> “
>       initQueries.add(pm.newQuery(MTableColumnStatistics.class, "dbName == 
> ''"));
>       initQueries.add(pm.newQuery(MPartitionColumnStatistics.class, "dbName 
> == ''"));
> ”
> should use "catName == ''" instead of "dbName == ''",because “catName” is the 
> first index column。
> When  data of metastore become large,for example, table of 
> MPartitionColumnStatistics have millions of lines。The 
> “newQuery(MPartitionColumnStatistics.class, "dbName == ''")” for metastore 
> executed very slowly,and the query “show tables“ for hiveserver2 executed 
> very slowly too。



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

Reply via email to