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https://issues.apache.org/jira/browse/HIVE-25431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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mahesh kumar behera reassigned HIVE-25431:
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> Enable CBO for null safe equality operator.
> -------------------------------------------
>
> Key: HIVE-25431
> URL: https://issues.apache.org/jira/browse/HIVE-25431
> Project: Hive
> Issue Type: Bug
> Components: Hive, HiveServer2
> Reporter: mahesh kumar behera
> Assignee: mahesh kumar behera
> Priority: Major
>
> The CBO is disabled for null safe equality (<=>) operator. This is causing
> the sub optimal join execution for some queries. As null safe equality is
> supported by joins, the CBO can be enabled for it. There will be issues with
> join reordering as Hive does not support join reordering for null safe
> equality operator. But with CBO enabled the join plan will be better.
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