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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TAJO-102) Add AlgebraVisitor and Refactor LogicalPlanner to use the visitor
Date Wed, 31 Jul 2013 16:05:49 GMT
Hyunsik Choi created TAJO-102:
---------------------------------

             Summary: Add AlgebraVisitor and Refactor LogicalPlanner to use the visitor
                 Key: TAJO-102
                 URL: https://issues.apache.org/jira/browse/TAJO-102
             Project: Tajo
          Issue Type: Improvement
          Components: planner/optimizer
            Reporter: Hyunsik Choi
            Assignee: Hyunsik Choi
             Fix For: 0.2-incubating


This patch adds AlgebraVisitor that visits the relational operators of the algebra expressions
recursively. It is helpful for implementing unit tests and utility methods related to algebra
expressions.

In addition, this patch refactors LogicalPlanner class to be based on AlgebraVisitor. This
change improves the code readability.

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