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https://issues.apache.org/jira/browse/CALCITE-7682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mihai Budiu resolved CALCITE-7682.
----------------------------------
    Fix Version/s: 1.43.0
         Assignee: Mihai Budiu
       Resolution: Fixed

Fixed in 
[https://github.com/apache/calcite/commit/fc95bb0e68c838da4232aabf47ee5037cf73b778]

Thank you for the review [~xuzifu666] 

> SESSION table function without the optional key descriptor fails at runtime
> ---------------------------------------------------------------------------
>
>                 Key: CALCITE-7682
>                 URL: https://issues.apache.org/jira/browse/CALCITE-7682
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.42.0
>            Reporter: Mihai Budiu
>            Assignee: Mihai Budiu
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 1.43.0
>
>
> {code:java}
> SELECT * FROM TABLE(SESSION(TABLE ORDERS, DESCRIPTOR(ROWTIME), INTERVAL '20' 
> MINUTE)); {code}
> Adding this query to stream.iq using the orinoco dataset produces the 
> following exception:
> {code:java}
> SESSION table function without KEY descriptor fails with ClassCastException 
> (Unable to implement EnumerableTableFunctionScan){code}



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