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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/10/02 09:02:00 UTC
[jira] [Work logged] (HIVE-24213) Incorrect exception in the Merge
MapJoinTask into its child MapRedTask optimizer
[ https://issues.apache.org/jira/browse/HIVE-24213?focusedWorklogId=493867&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-493867 ]
ASF GitHub Bot logged work on HIVE-24213:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 02/Oct/20 09:01
Start Date: 02/Oct/20 09:01
Worklog Time Spent: 10m
Work Description: kuczoram merged pull request #1539:
URL: https://github.com/apache/hive/pull/1539
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Issue Time Tracking
-------------------
Worklog Id: (was: 493867)
Time Spent: 20m (was: 10m)
> Incorrect exception in the Merge MapJoinTask into its child MapRedTask optimizer
> --------------------------------------------------------------------------------
>
> Key: HIVE-24213
> URL: https://issues.apache.org/jira/browse/HIVE-24213
> Project: Hive
> Issue Type: Bug
> Components: Physical Optimizer
> Affects Versions: 4.0.0
> Reporter: Zoltan Matyus
> Assignee: Zoltan Matyus
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> The {{CommonJoinTaskDispatcher#mergeMapJoinTaskIntoItsChildMapRedTask}} method throws a {{SemanticException}} if the number of {{FileSinkOperator}}s it finds is not exactly 1. The exception is valid if zero operators are found, but there can be valid use cases where multiple FileSinkOperators exist.
> Example: the MapJoin and it child are used in a common table expression, which is used for multiple inserts.
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