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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2018/08/11 01:02:00 UTC

[jira] [Assigned] (HIVE-17044) Transform LEFT/RIGHT OUTER into INNER join in the presence of FK relationship

     [ https://issues.apache.org/jira/browse/HIVE-17044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jesus Camacho Rodriguez reassigned HIVE-17044:
----------------------------------------------

    Assignee: Jesus Camacho Rodriguez

> 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
>
> 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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