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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2018/08/30 03:58:00 UTC

[jira] [Updated] (CALCITE-2469) RexSimplify should optimize '(NOT x) IS NULL' to 'x IS NULL'

     [ https://issues.apache.org/jira/browse/CALCITE-2469?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde updated CALCITE-2469:
---------------------------------
    Summary: RexSimplify should optimize '(NOT x) IS NULL' to 'x IS NULL'  (was: RexSimplify should not optimize '(not x) is null' to 'x is not null')

> RexSimplify should optimize '(NOT x) IS NULL' to 'x IS NULL'
> ------------------------------------------------------------
>
>                 Key: CALCITE-2469
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2469
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.17.0
>            Reporter: pengzhiwei
>            Assignee: Julian Hyde
>            Priority: Critical
>
> The RexSimplify will optimize the '(not x) is null' to 'x is not null'. However,this is incorrect.It is same to the case '(not x) is not null' .
>  



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