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Posted to issues@calcite.apache.org by "Chunwei Lei (Jira)" <ji...@apache.org> on 2020/02/20 14:59:00 UTC

[jira] [Updated] (CALCITE-3809) RexSimplify simplifies nondeterministic function incorrectly

     [ https://issues.apache.org/jira/browse/CALCITE-3809?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chunwei Lei updated CALCITE-3809:
---------------------------------
    Description: For example, {{rand() = rand()}} will be simplified to {{IS NOT NULL(rand())}}, which is wrong because {{rand() = rand()}} might be false while {{IS NOT NULL(rand())}} is always true.  (was: For example, {{rand() = rand()}} will be simplified it to {{IS NOT NULL(rand())}}, which is wrong because {{rand() = rand()}} might be false while {{IS NOT NULL(rand())}} is always true.)

> RexSimplify simplifies nondeterministic function incorrectly
> ------------------------------------------------------------
>
>                 Key: CALCITE-3809
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3809
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.21.0
>            Reporter: Chunwei Lei
>            Assignee: Chunwei Lei
>            Priority: Major
>             Fix For: 1.22.0
>
>
> For example, {{rand() = rand()}} will be simplified to {{IS NOT NULL(rand())}}, which is wrong because {{rand() = rand()}} might be false while {{IS NOT NULL(rand())}} is always true.



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