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https://issues.apache.org/jira/browse/CALCITE-7035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alessandro Solimando closed CALCITE-7035.
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> SQL calls without an implementor or convertlet (NULLIF, YEAR, ...) throw an
> error when having a subquery as parameter
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: CALCITE-7035
> URL: https://issues.apache.org/jira/browse/CALCITE-7035
> Project: Calcite
> Issue Type: Bug
> Reporter: Aleksey Plekhanov
> Priority: Major
> Labels: pull-request-available
>
> After CALCITE-6978 {{SqlCall}}'s with subqueries are not rewritten during
> validation even when {{withCallRewrite(true)}} property is set in the
> configuration.
> Functions like {{NULLIF}}, {{YEAR}}, {{MONTH}}, etc don't have implementor or
> convertlet, so, when used with subqueries, throw an error: Unable to
> implement.
> Examples of problematic queries:
> {noformat}
> select nullif((select max(emps.age) from emps), 0);
> select year(select max(joinedat) from emps);
> {noformat}
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