Gengliang Wang created SPARK-22719:
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Summary: refactor ConstantPropagation
Key: SPARK-22719
URL: https://issues.apache.org/jira/browse/SPARK-22719
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.2.0
Reporter: Gengliang Wang
The current time complexity of ConstantPropagation is O(n^2), which can be slow
when the query is complex.
Refactor the implementation with O(n) time complexity
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