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https://issues.apache.org/jira/browse/CALCITE-3872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17067937#comment-17067937
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Julian Hyde commented on CALCITE-3872:
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[~fan_li_ya] I see that your PR is straying into constant reduction. Constant
reduction is a solved problem (probably if you use the right RexExecutor). I
don't think we need extra code in RexSimplify for constant reduction.
> Simplify expressions with unary minus
> -------------------------------------
>
> Key: CALCITE-3872
> URL: https://issues.apache.org/jira/browse/CALCITE-3872
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Liya Fan
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Support simplifying expression - ( - ( x ) ) as x.
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