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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1266) partitioning pruing should be more intelligent
Date Mon, 22 Mar 2010 05:04:27 GMT
partitioning pruing should be more intelligent
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                 Key: HIVE-1266
                 URL: https://issues.apache.org/jira/browse/HIVE-1266
             Project: Hadoop Hive
          Issue Type: Bug
          Components: Query Processor
            Reporter: Namit Jain
            Assignee: He Yongqiang


Copying the mail from Adam:

A badly written query:

select .. from T where partitioning_colmn = 'p1' AND c1 = 100 or c2 = 200

...is a command I just foolishly ran: I should have put the disjunction in parentheses.

But the command actually touched every partition of T without a warning. Is that a bug? When
we force people to state a partition predicate, it seems we are just looking for it to be
referenced in the WHERE or ON clause, when maybe we should be looking at conjuncts?

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