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https://issues.apache.org/jira/browse/CALCITE-3809?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chunwei Lei updated CALCITE-3809:
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Description: 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. (was: For example, {{rand() =
rand()}} will be simplified it to {{IS NOT NULL(rand())}}, which is wrong
because {{rand() = rand()}} might be false while {{IS NOT NULL(rand())}} is
always true.)
> 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
> Fix For: 1.22.0
>
>
> 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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