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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2023/04/05 07:14:00 UTC
[jira] [Work logged] (HIVE-26968) SharedWorkOptimizer merges TableScan operators that have different DPP parents
[ https://issues.apache.org/jira/browse/HIVE-26968?focusedWorklogId=854950&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-854950 ]
ASF GitHub Bot logged work on HIVE-26968:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 05/Apr/23 07:13
Start Date: 05/Apr/23 07:13
Worklog Time Spent: 10m
Work Description: zabetak commented on PR #3981:
URL: https://github.com/apache/hive/pull/3981#issuecomment-1497026153
Thanks for the update @ngsg ; I am bit underwater these days but this is on my TODO list!
Issue Time Tracking
-------------------
Worklog Id: (was: 854950)
Time Spent: 50m (was: 40m)
> SharedWorkOptimizer merges TableScan operators that have different DPP parents
> ------------------------------------------------------------------------------
>
> Key: HIVE-26968
> URL: https://issues.apache.org/jira/browse/HIVE-26968
> Project: Hive
> Issue Type: Sub-task
> Affects Versions: 4.0.0-alpha-2
> Reporter: Seonggon Namgung
> Assignee: Seonggon Namgung
> Priority: Critical
> Labels: hive-4.0.0-must, pull-request-available
> Attachments: TPC-DS Query64 OperatorGraph.pdf
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> SharedWorkOptimizer merges TableScan operators that have different DPP parents, which leads to the creation of semantically wrong query plan.
> In our environment, running TPC-DS query64 on 1TB Iceberg format table returns no rows because of this problem. (The correct result has 7094 rows.)
> We use hive.optimize.shared.work=true, hive.optimize.shared.work.extended=true, and hive.optimize.shared.work.dppunion=false to reproduce the bug.
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