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Posted to issues-all@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2018/11/01 00:55:00 UTC

[jira] [Updated] (IMPALA-4958) Simplify binary predicates in the FE

     [ https://issues.apache.org/jira/browse/IMPALA-4958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong updated IMPALA-4958:
----------------------------------
    Issue Type: Improvement  (was: Bug)

> Simplify binary predicates in the FE
> ------------------------------------
>
>                 Key: IMPALA-4958
>                 URL: https://issues.apache.org/jira/browse/IMPALA-4958
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Frontend
>    Affects Versions: Impala 2.9.0
>            Reporter: Lars Volker
>            Priority: Major
>              Labels: ramp-up
>
> The frontend currently allows redundant expressions like {{a < 5 and a < 3}}. We should simplify these. We should also find contradictions like {{a < 3 and a > 5}} reduce them to {{FALSE}}.



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