[jira] [Work logged] (HIVE-26762) Remove operand pruning in HiveFilterSetOpTransposeRule

Mon, 05 Dec 2022 05:51:09 -0800 


     [ 
https://issues.apache.org/jira/browse/HIVE-26762?focusedWorklogId=831021&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-831021
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ASF GitHub Bot logged work on HIVE-26762:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 05/Dec/22 13:50
            Start Date: 05/Dec/22 13:50
    Worklog Time Spent: 10m 
      Work Description: sonarcloud[bot] commented on PR #3825:
URL: https://github.com/apache/hive/pull/3825#issuecomment-1337399540

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

    Worklog Id:     (was: 831021)
    Time Spent: 50m  (was: 40m)

> Remove operand pruning in HiveFilterSetOpTransposeRule
> ------------------------------------------------------
>
>                 Key: HIVE-26762
>                 URL: https://issues.apache.org/jira/browse/HIVE-26762
>             Project: Hive
>          Issue Type: Task
>          Components: CBO, Query Planning
>    Affects Versions: 4.0.0-alpha-2
>            Reporter: Alessandro Solimando
>            Assignee: Alessandro Solimando
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> HiveFilterSetOpTransposeRule, when applied to UNION ALL operands, checks if 
> the newly pushed filter simplifies to FALSE (due to the predicates holding on 
> the input).
> If this is true and there is more than one UNION ALL operand, it gets pruned.
> After HIVE-26524 ("Use Calcite to remove sections of a query plan known never 
> produces rows"), this is possibly redundant and we could drop this feature 
> and let the other rules take care of the pruning.
> In such a case, it might be even possible to drop the Hive specific rule and 
> relies on the Calcite one (the difference is just the operand pruning at the 
> moment of writing), similarly to what HIVE-26642 did for 
> HiveReduceExpressionRule. Writing it here as a reminder, but it's recommended 
> to tackle this in a separate ticket after verifying that is feasible.



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