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https://issues.apache.org/jira/browse/CALCITE-2455?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yuzhao Chen updated CALCITE-2455:
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Summary: simplifyCoalesce of constant should match nullability (was: Fix
simplifyCoalesce of constant when nullability missing)
> simplifyCoalesce of constant should match nullability
> -----------------------------------------------------
>
> Key: CALCITE-2455
> URL: https://issues.apache.org/jira/browse/CALCITE-2455
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.17.0
> Reporter: Yuzhao Chen
> Assignee: Julian Hyde
> Priority: Major
> Fix For: 1.18.0
>
>
> After CALCITE-2227, we will not replace Coalesce to Case When for natural
> join, when we use ReduceExpressionRule for our plan for Coalesce with
> constant, the nullability will chage( from nullable to notnull), this will
> cause VolcanoPlanner to throw error.
> Should i fix this? or we should not use this rule in VolcanoPlanner?
> This is the error thrown sql :
> {code:java}
> select * from lateral (select * from scott_emp) as e
> join (table scott_dept) using (deptno)
> where e.deptno = 10
> {code}
>
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