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https://issues.apache.org/jira/browse/HIVE-17044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez resolved HIVE-17044.
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Resolution: Fixed
Fix Version/s: 4.0.0
Fixed in HIVE-17040.
> Transform LEFT/RIGHT OUTER into INNER join in the presence of FK relationship
> -----------------------------------------------------------------------------
>
> Key: HIVE-17044
> URL: https://issues.apache.org/jira/browse/HIVE-17044
> Project: Hive
> Issue Type: Sub-task
> Components: Logical Optimizer
> Affects Versions: 3.0.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Fix For: 4.0.0
>
>
> Consider we are executing a LEFT OUTER join on two tables using their
> FK-UK/PK relationship. We might be able to transform the OUTER into an INNER
> join if the FK columns (OUTER relationship) are not nullable. Similarly for
> RIGHT OUTER join.
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