Hyunsik Choi created TAJO-416:
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Summary: Investigate more sophisticated cost function
Key: TAJO-416
URL: https://issues.apache.org/jira/browse/TAJO-416
Project: Tajo
Issue Type: Improvement
Components: planner/optimizer
Reporter: Hyunsik Choi
Fix For: 1.0-incubating
GreedyHeuristicJoinOrderAlgorithm::getCost estimates costs of operators by
using their input or intermediate data volumes. But, this function only deals
with limited operators. Their cost computation algorithms are too simple. We
need to investigate more sophisticated ways and implement them.
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