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https://issues.apache.org/jira/browse/CALCITE-5780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17732856#comment-17732856
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xiong duan commented on CALCITE-5780:
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[~Runking] Hi, The
1 > x or 0 < x or x is null
can't be simplified to TRUE? Need to modify it. And I get your point. It is
reasonable. +1. Also, I want to know if this can handle expressions like:
1 > x or x >=1 or x is null
> Always-true OR expressions contain reverse order comparison should be
> simplified to TRUE
> ----------------------------------------------------------------------------------------
>
> Key: CALCITE-5780
> URL: https://issues.apache.org/jira/browse/CALCITE-5780
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.34.0
> Reporter: Runkang He
> Assignee: Runkang He
> Priority: Major
> Labels: pull-request-available
>
> The following expressions which contain reverse order comparison are always
> true:
> {code:sql}
> 1 > x or 1 <= x or x is null
> 1 < x or 1 >= x or x is null
> 1 > x or 0 < x or x is null
> {code}
> But currently these expressions are not fully simplified to TRUE, the current
> simplified results are SEARCH operator.
> The root cause is that RexSimplify doesn't identify these cases and makes
> targeted simplification.
> It would be nice if RexSimplify.simplifyOr handled these cases.
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