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https://issues.apache.org/jira/browse/CALCITE-3217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Danny Chen resolved CALCITE-3217.
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Fix Version/s: 1.21.0
Assignee: Danny Chen
Resolution: Duplicate
Mark as duplicated because CALCITE-2302 already covered this issue.
> Support "SELECT NULL"
> ---------------------
>
> Key: CALCITE-3217
> URL: https://issues.apache.org/jira/browse/CALCITE-3217
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Xurenhe
> Assignee: Danny Chen
> Priority: Minor
> Fix For: 1.21.0
>
> Attachments: Jietu20190728-221651.jpg
>
>
>
> Should Calcite need to support "select null", such as:
> {code:java}
> select null;{code}
> In the version of "1.20.0", it throws exception in
> `org.apache.calcite.sql.validate.SqlValidatorImpl#inferUnknownTypes`.
>
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