Liang-Chi Hsieh created SPARK-21990:
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Summary: QueryPlanConstraints misses some constraints can be
recursively inferred
Key: SPARK-21990
URL: https://issues.apache.org/jira/browse/SPARK-21990
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.2.0
Reporter: Liang-Chi Hsieh
When I inspected the latest change of SPARK-21979, I found we could miss few
constraints that can be recursively inferred.
E.g. consider constraints {{a === b && b === c && a === 1 && b === 5}}.
Currently we only infer {{a === c && b === 1 && c === 5}}, but {{c === 1}} can
be also inferred from newly inferred constraint {{a === c}}.
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