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https://issues.apache.org/jira/browse/CALCITE-3852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17056961#comment-17056961
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Chunwei Lei commented on CALCITE-3852:
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IMO, Given {{x=9}}, {{x != 9}} can be simplified to {{false}} and {{x != 3}}
can be simplified to {{true}}.
Please correct me if I am wrong.
> RexSimplify doesn't simplify NOT EQUAL predicates
> -------------------------------------------------
>
> Key: CALCITE-3852
> URL: https://issues.apache.org/jira/browse/CALCITE-3852
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Chunwei Lei
> Assignee: Chunwei Lei
> Priority: Major
>
> Given x=9, RexSimplify does not simplify x != 9 to false.
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