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https://issues.apache.org/jira/browse/CAY-2891?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nikita Timofeev closed CAY-2891.
--------------------------------
    Resolution: Fixed

https://github.com/apache/cayenne/pull/634

> Expressions: incorrect SQL translation of the ASTNegate node with scalar 
> argument
> ---------------------------------------------------------------------------------
>
>                 Key: CAY-2891
>                 URL: https://issues.apache.org/jira/browse/CAY-2891
>             Project: Cayenne
>          Issue Type: Bug
>          Components: Core Library
>    Affects Versions: 4.2.2, 5.0-M1
>            Reporter: Nikita Timofeev
>            Priority: Minor
>             Fix For: 5.0-M2
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Simple expression like {{ASTNegate}} + {{ASTScalar}} translates to something 
> like {{"- NULL"}} in the SQL. There's no direct way to get this combination 
> via Cayenne API, only with some sort of expression generator, but still that 
> looks like something we could deal with.



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