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https://issues.apache.org/jira/browse/CALCITE-3809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17041527#comment-17041527
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Danny Chen commented on CALCITE-3809:
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Is this issue going to be included in 1.22 ?
> RexSimplify simplifies nondeterministic function incorrectly
> ------------------------------------------------------------
>
> Key: CALCITE-3809
> URL: https://issues.apache.org/jira/browse/CALCITE-3809
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.21.0
> Reporter: Chunwei Lei
> Assignee: Chunwei Lei
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.22.0
>
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> For example, {{rand() = rand()}} will be simplified to {{IS NOT
> NULL(rand())}}, which is wrong because {{rand() = rand()}} might be false
> while {{IS NOT NULL(rand())}} is always true.
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