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https://issues.apache.org/jira/browse/CALCITE-1864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-1864:
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Summary: Allow NULL literal as argument (was: Allow NULL as argument)
> Allow NULL literal as argument
> ------------------------------
>
> Key: CALCITE-1864
> URL: https://issues.apache.org/jira/browse/CALCITE-1864
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
>
> Even though the SQL standard does not allow raw (non-casted) NULL literals,
> most databases do. So we should allow {{1 = null}} or {{select * from emp
> where empno > null}}. Of course, these expressions always return UNKNOWN.
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