You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@calcite.apache.org by "pengzhiwei (JIRA)" <ji...@apache.org> on 2018/08/16 16:05:00 UTC

[jira] [Comment Edited] (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=16582745#comment-16582745 ] 

pengzhiwei edited comment on CALCITE-2469 at 8/16/18 4:04 PM:
--------------------------------------------------------------

I agree with you [~vladimirsitnikov] that 'not（x） is null' should optimize to 'x is null'.I will add a

simlifyIsNull() method in RexSimplify later just like thesimplifyIsNotNull().

.


was (Author: pzw2018):
I agree with you [~vladimirsitnikov] that 'not(x) is null' should optimize to 'x is null'.I will add a

simlifyIsNull() method in RexSimplify later just like thesimplifyIsNotNull().

.

> 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' .
>  



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)