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https://issues.apache.org/jira/browse/HIVE-22710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17011498#comment-17011498
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Chinna Rao Lalam commented on HIVE-22710:
-----------------------------------------

Hi [~jcamachorodriguez],

We encountered this issue and when analyzing we come across these issues 
CALCITE-2883 And HIVE-21365. Do you think still OOM problem is there in 
HepPlanner of CALCITE.  Please throw some insights about this issue.

 

 

> When set CBO on, CalcitePlanner genOPTree will be Out Of Memory
> ---------------------------------------------------------------
>
>                 Key: HIVE-22710
>                 URL: https://issues.apache.org/jira/browse/HIVE-22710
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 3.1.0, 3.1.2
>            Reporter: LuGuangMing
>            Priority: Major
>         Attachments: error_stack.log, sample.sql
>
>
> When set hive.cbo.enable=true, and execute a SQL contains union all and join 
> to insert the result into three tables. Outofmemoryerror will appear in the 
> compilation phase. For detailed SQL statements and error logs, please refer 
> to the attachment. The same problem exists in hive 4.0.0



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