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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1534) predicate pushdown does not work correctly with outer joins
Date Thu, 12 Aug 2010 06:05:16 GMT
predicate pushdown does not work correctly with outer joins
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                 Key: HIVE-1534
                 URL: https://issues.apache.org/jira/browse/HIVE-1534
             Project: Hadoop Hive
          Issue Type: Bug
          Components: Query Processor
            Reporter: Amareshwari Sriramadasu


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)


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