[jira] [Work logged] (HIVE-24969) Predicates may be removed when decorrelating subqueries with lateral

Thu, 01 Sep 2022 20:17:04 -0700 


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https://issues.apache.org/jira/browse/HIVE-24969?focusedWorklogId=805669&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-805669
 ]

ASF GitHub Bot logged work on HIVE-24969:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 02/Sep/22 03:16
            Start Date: 02/Sep/22 03:16
    Worklog Time Spent: 10m 
      Work Description: sonarcloud[bot] commented on PR #3018:
URL: https://github.com/apache/hive/pull/3018#issuecomment-1235022602

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

    Worklog Id:     (was: 805669)
    Time Spent: 3.5h  (was: 3h 20m)

> Predicates may be removed when decorrelating subqueries with lateral
> --------------------------------------------------------------------
>
>                 Key: HIVE-24969
>                 URL: https://issues.apache.org/jira/browse/HIVE-24969
>             Project: Hive
>          Issue Type: Bug
>          Components: Logical Optimizer
>            Reporter: Zhihua Deng
>            Assignee: Zhihua Deng
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 3.5h
>  Remaining Estimate: 0h
>
> Step to reproduce：
> {code:java}
> select count(distinct logItem.triggerId)
> from service_stat_log LATERAL VIEW explode(logItems) LogItemTable AS logItem
> where logItem.dsp in ('delivery', 'ocpa')
> and logItem.iswin = true
> and logItem.adid in (
>  select distinct adId
>  from ad_info
>  where subAccountId in (16010, 14863));  {code}
> For predicates _logItem.dsp in ('delivery', 'ocpa')_  and _logItem.iswin = 
> true_ are removed when doing ppd: JOIN ->   RS  -> LVJ.  The JOIN has 
> candicates: logitem -> [logItem.dsp in ('delivery', 'ocpa'), logItem.iswin = 
> true]，when pushing them to the RS followed by LVJ,  none of them are pushed, 
> the candicates of logitem are removed finally by default, which cause to the 
> wrong result.



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