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https://issues.apache.org/jira/browse/CALCITE-5798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17739999#comment-17739999
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xiong duan commented on CALCITE-5798:
-------------------------------------
Fixed in
[5981ab6b419|https://github.com/apache/calcite/commit/5981ab6b41965a7e2be08a7a3c595c058642c44f].
Thanks for your contribution [~Runking] . Thanks for the review [~kgyrtkirk].
> Improve simplification of '(x < y) IS NOT TRUE' when x and y are not nullable
> -----------------------------------------------------------------------------
>
> Key: CALCITE-5798
> URL: https://issues.apache.org/jira/browse/CALCITE-5798
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.34.0
> Reporter: Runkang He
> Assignee: Runkang He
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.35.0
>
>
> Currently '(1 < x) IS NOT TRUE' when pulled up predicates contain 'x IS NOT
> NULL' is not simplified, and keeps it as it is.
>
> It can and should be simplified to '1 >= x', which is more concise and useful
> for further simplification, such as CALCITE-5780
>
> Note that this Jira is splited from CALCITE-5780, which makes this part of
> codes more clear, and follows the principle that a Jira only discusses one
> issue.
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