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Posted to issues@spark.apache.org by "Liang-Chi Hsieh (JIRA)" <ji...@apache.org> on 2017/09/13 08:43:00 UTC
[jira] [Updated] (SPARK-21990) QueryPlanConstraints misses some
constraints that can be recursively inferred
[ https://issues.apache.org/jira/browse/SPARK-21990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Liang-Chi Hsieh updated SPARK-21990:
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Summary: QueryPlanConstraints misses some constraints that can be recursively inferred (was: QueryPlanConstraints misses some constraints can be recursively inferred)
> 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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