Hyunsik Choi created TAJO-102:
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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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