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Posted to issues@calcite.apache.org by "pengzhiwei (JIRA)" <ji...@apache.org> on 2018/08/27 06:38:00 UTC

[jira] [Commented] (CALCITE-2469) RexSimplify should not optimize '(not x) is null' to 'x is not null'

    [ https://issues.apache.org/jira/browse/CALCITE-2469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16593237#comment-16593237 ] 

pengzhiwei commented on CALCITE-2469:
-------------------------------------

Hi @[~vladimirsitnikov] ,do we need to fix this issue or need some other work in 1.18.0?

> RexSimplify should not optimize '(not x) is null' to 'x is not 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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