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Posted to dev@tajo.apache.org by "Hyunsik Choi (JIRA)" <ji...@apache.org> on 2013/11/18 11:49:24 UTC

[jira] [Created] (TAJO-316) Improve GreedyHeuristicJoinOrderAlgorithm to deal with non-commutative joins

Hyunsik Choi created TAJO-316:
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             Summary: Improve GreedyHeuristicJoinOrderAlgorithm to deal with non-commutative joins
                 Key: TAJO-316
                 URL: https://issues.apache.org/jira/browse/TAJO-316
             Project: Tajo
          Issue Type: Improvement
          Components: planner/optimizer
            Reporter: Hyunsik Choi
            Assignee: Hyunsik Choi
             Fix For: 0.8-incubating


GreedyHeuristicJoinOrderAlgorithm is a default cost-based join order algorithm. It is designed only for inner joins, and it cannot deal with non-commutative joins, such as left/right/full outer join and semi/anti join. The main goal of this issue is to improve this algorithm to deal with them.



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