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https://issues.apache.org/jira/browse/CALCITE-6440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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xiong duan reopened CALCITE-6440:
---------------------------------
Looks the SortRemoveConstantKeysRule can't remove the sort key when the sort
key is NULL.
> Add optimization to returns empty when The Order By parameter in the Sort
> operator is empty
> -------------------------------------------------------------------------------------------
>
> Key: CALCITE-6440
> URL: https://issues.apache.org/jira/browse/CALCITE-6440
> Project: Calcite
> Issue Type: New Feature
> Components: core
> Affects Versions: 1.37.0
> Reporter: Caican Cai
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.38.0
>
>
> For the following SQL:
> {code:java}
> select * from task order by null; {code}
> We could rewrite it to:
> {code:java}
> select * from task;{code}
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