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https://issues.apache.org/jira/browse/HIVE-1534?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amareshwari Sriramadasu updated HIVE-1534:
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Summary: Join filters does not work correctly with outer joins (was:
predicate pushdown does not work correctly with outer joins)
Description:
SELECT * FROM T1 LEFT OUTER JOIN T2 ON (T1.c1=T2.c2 AND T1.c1 < 10)
and SELECT * FROM T1 RIGHT OUTER JOIN T2 ON (T1.c1=T2.c2 AND T2.c1 < 10)
does not give correct results.
was:
The hive documentation for predicate pushdown says:
Left outer join: predicates on the left side aliases are pushed
Right outer join: predicates on the right side aliases are pushed
But, this pushdown should not happen for AND predicates in join queries:
ex: SELECT * FROM T1 JOIN T2 ON (T1.c1=T2.c2 AND T1.c1 < 10)
> Join filters does not work correctly with outer joins
> -----------------------------------------------------
>
> Key: HIVE-1534
> URL: https://issues.apache.org/jira/browse/HIVE-1534
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
>
> SELECT * FROM T1 LEFT OUTER JOIN T2 ON (T1.c1=T2.c2 AND T1.c1 < 10)
> and SELECT * FROM T1 RIGHT OUTER JOIN T2 ON (T1.c1=T2.c2 AND T2.c1 < 10)
> does not give correct results.
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