[jira] [Work logged] (HIVE-26618) Add setting to turn on/off removing sections of a query plan known never produces rows

Wed, 12 Oct 2022 01:00:41 -0700 


     [ 
https://issues.apache.org/jira/browse/HIVE-26618?focusedWorklogId=816014&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-816014
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ASF GitHub Bot logged work on HIVE-26618:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 12/Oct/22 07:59
            Start Date: 12/Oct/22 07:59
    Worklog Time Spent: 10m 
      Work Description: sonarcloud[bot] commented on PR #3659:
URL: https://github.com/apache/hive/pull/3659#issuecomment-1275750480

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

    Worklog Id:     (was: 816014)
    Time Spent: 0.5h  (was: 20m)

> Add setting to turn on/off removing sections of a query plan known never 
> produces rows
> --------------------------------------------------------------------------------------
>
>                 Key: HIVE-26618
>                 URL: https://issues.apache.org/jira/browse/HIVE-26618
>             Project: Hive
>          Issue Type: Improvement
>          Components: CBO
>            Reporter: Krisztian Kasa
>            Assignee: Krisztian Kasa
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0, 4.0.0-alpha-2
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> HIVE-26524 introduced an optimization to remove sections of query plan known 
> never produces rows.
> Add a setting into hive conf to turn on/off this optimization.
> When the optimization is turned off restore the legacy behavior:
> * represent empty result operator with {{HiveSortLimit}} 0
> * disable {{HiveRemoveEmptySingleRules}}



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