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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-450) PERFORMANCE: Distinct should make use of combiner to remove duplicate values from keys.
Date Tue, 23 Sep 2008 19:31:44 GMT
PERFORMANCE:  Distinct should make use of combiner to remove duplicate values from keys.
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                 Key: PIG-450
                 URL: https://issues.apache.org/jira/browse/PIG-450
             Project: Pig
          Issue Type: Bug
          Components: impl
    Affects Versions: types_branch
            Reporter: Alan Gates
            Assignee: Alan Gates
             Fix For: types_branch


In 2.0 distinct was improved by removing values in the map and just passing an empty tuple
along with the key.  This can be further improved by adding a combiner step that passes along
only the first empty tuple instead of all of them.

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