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Posted to issues@calcite.apache.org by "pengzhiwei (JIRA)" <ji...@apache.org> on 2018/08/23 07:32:00 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=16583330#comment-16583330 ] 

pengzhiwei edited comment on CALCITE-2469 at 8/23/18 7:31 AM:
--------------------------------------------------------------

[~julianhyde] and [~vladimirsitnikov] I have changed the description to '(not x) is null'.

And the PR is updated to [PR 796|https://github.com/apache/calcite/pull/796]


was (Author: pzw2018):
[~julianhyde] and [~vladimirsitnikov] I have change the description to '(not x) is null'.

And the PR is updated to [PR 796|https://github.com/apache/calcite/pull/796]

> 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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