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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HIVE-23712) metadata-only queries return incorrect results with empty acid partition
Date Thu, 25 Jun 2020 09:03:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-23712?focusedWorklogId=450875&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-450875
]

ASF GitHub Bot logged work on HIVE-23712:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 25/Jun/20 09:02
            Start Date: 25/Jun/20 09:02
    Worklog Time Spent: 10m 
      Work Description: abstractdog opened a new pull request #1182:
URL: https://github.com/apache/hive/pull/1182


   Change-Id: Ia63c4a502f77f863f1ee20e0a407893689d79afb
   
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   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
   


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

            Worklog Id:     (was: 450875)
    Remaining Estimate: 0h
            Time Spent: 10m

> metadata-only queries return incorrect results with empty acid partition
> ------------------------------------------------------------------------
>
>                 Key: HIVE-23712
>                 URL: https://issues.apache.org/jira/browse/HIVE-23712
>             Project: Hive
>          Issue Type: Bug
>            Reporter: László Bodor
>            Assignee: László Bodor
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Similarly to HIVE-15397, queries can return incorrect results for metadata-only queries,
here is a repro scenario which affects master:
> {code}
> set hive.support.concurrency=true;
> set hive.exec.dynamic.partition.mode=nonstrict;
> set hive.txn.manager=org.apache.hadoop.hive.ql.lockmgr.DbTxnManager;
> set hive.optimize.metadataonly=true;
> create table test1 (id int, val string) partitioned by (val2 string) STORED AS ORC TBLPROPERTIES
('transactional'='true');
> describe formatted test1;
> alter table test1 add partition (val2='foo');
> alter table test1 add partition (val2='bar');
> insert into test1 partition (val2='foo') values (1, 'abc');
> select distinct val2, current_timestamp from test1;
> insert into test1 partition (val2='bar') values (1, 'def');
> delete from test1 where val2 = 'bar';
> select '--> hive.optimize.metadataonly=true';
> select distinct val2, current_timestamp from test1;
> set hive.optimize.metadataonly=false;
> select '--> hive.optimize.metadataonly=false';
> select distinct val2, current_timestamp from test1;
> select current_timestamp, * from test1;
> {code}
> in this case 2 rows returned instead of 1 after a delete with metadata only optimization:
> https://github.com/abstractdog/hive/commit/a7f03513564d01f7c3ba4aa61c4c6537100b4d3f#diff-cb23043000831f41fe7041cb38f82224R114-R128



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