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https://issues.apache.org/jira/browse/SPARK-21990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Liang-Chi Hsieh updated SPARK-21990:
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Description:
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}}.
was:
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}}.
> QueryPlanConstraints misses some constraints that 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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