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https://issues.apache.org/jira/browse/CALCITE-2556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16613656#comment-16613656
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Vladimir Sitnikov commented on CALCITE-2556:
--------------------------------------------

Apparently you think CALCITE-2469 "qualifies" for RexSimplify (as you have 
committed Strong there)
However, you somehow have struggle to qualify  CALCITE-2555 for RexSimplify.

That sounds very strange since the only difference between the two is 
{{>=(...)}} vs {{IS (...)}}

> RexSimplify: not(trueLiteral) could be simplified to false
> ----------------------------------------------------------
>
>                 Key: CALCITE-2556
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2556
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 1.17.0
>            Reporter: Vladimir Sitnikov
>            Assignee: Julian Hyde
>            Priority: Major
>




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