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https://issues.apache.org/jira/browse/HIVE-25485?focusedWorklogId=651033&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-651033
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ASF GitHub Bot logged work on HIVE-25485:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 15/Sep/21 11:34
Start Date: 15/Sep/21 11:34
Worklog Time Spent: 10m
Work Description: kgyrtkirk commented on pull request #2608:
URL: https://github.com/apache/hive/pull/2608#issuecomment-919939445
@kasakrisz could you please take a look?
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Issue Time Tracking
-------------------
Worklog Id: (was: 651033)
Time Spent: 20m (was: 10m)
> Transform selects of literals under a UNION ALL to inline table scan
> --------------------------------------------------------------------
>
> Key: HIVE-25485
> URL: https://issues.apache.org/jira/browse/HIVE-25485
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> {code}
> select 1
> union all
> select 1
> union all
> [...]
> union all
> select 1
> {code}
> results in a very big plan; which will have vertexes proportional to the
> number of union all branch - hence it could be slow to execute it
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