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Posted to issues@impala.apache.org by "Michael Smith (Jira)" <ji...@apache.org> on 2022/05/25 15:24:00 UTC

[jira] [Resolved] (IMPALA-11274) CNF Rewrite causes a regress in join node performance

     [ https://issues.apache.org/jira/browse/IMPALA-11274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Smith resolved IMPALA-11274.
------------------------------------
    Fix Version/s: Impala 4.2.0
       Resolution: Fixed

> CNF Rewrite causes a regress in join node performance
> -----------------------------------------------------
>
>                 Key: IMPALA-11274
>                 URL: https://issues.apache.org/jira/browse/IMPALA-11274
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Frontend
>            Reporter: Qifan Chen
>            Assignee: Michael Smith
>            Priority: Major
>             Fix For: Impala 4.2.0
>
>
> It appears that cnf rewrite can generate more predicates and presumably cause the same query to execute slower.



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