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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-562) join does not work well if there is a very large skew in keys
Date Mon, 15 Jun 2009 22:56:08 GMT
join does not work well if there is a very large skew in keys
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                 Key: HIVE-562
                 URL: https://issues.apache.org/jira/browse/HIVE-562
             Project: Hadoop Hive
          Issue Type: Improvement
          Components: Query Processor
    Affects Versions: 0.4.0
            Reporter: Namit Jain


Only the last table is streamed in case of regular joins.

So, for any other table, or for any small table (in case of map-joins), if the number of values
for a given key are very large, it does not scale.




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