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Posted to issues@hive.apache.org by "Zoltan Haindrich (JIRA)" <ji...@apache.org> on 2018/09/17 11:00:02 UTC
[jira] [Commented] (HIVE-20576) Fix incorrect results in
multiMapJoin2 when hive.transpose.aggr.join is enabled
[ https://issues.apache.org/jira/browse/HIVE-20576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16617370#comment-16617370 ]
Zoltan Haindrich commented on HIVE-20576:
-----------------------------------------
From the plan changes I think the most notable is that the number of Semi Joins have increased...it might be related
{code}
$ git diff|grep Join|grep -i semi
Left Semi Join 0 to 1
+ Left Semi Join 0 to 1
Left Semi Join 0 to 1
+ Left Semi Join 0 to 1
+ Left Semi Join 0 to 1
+ Left Semi Join 0 to 1
- Left Semi Join 0 to 1
- Left Semi Join 0 to 1
+ Left Semi Join 0 to 1
+ Left Semi Join 0 to 1
{code}
> Fix incorrect results in multiMapJoin2 when hive.transpose.aggr.join is enabled
> -------------------------------------------------------------------------------
>
> Key: HIVE-20576
> URL: https://issues.apache.org/jira/browse/HIVE-20576
> Project: Hive
> Issue Type: Bug
> Environment: there are a lot of empty rows appearing in one of the result sets; and a lot of real values going away...
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
>
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