[jira] [Commented] (JDO-650) Support for conditional operator ? : in JDOQL

["Andy Jefferson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JDO-650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14047069#comment-14047069 ] 

Andy Jefferson commented on JDO-650:
------------------------------------

Suggested JDOQL syntax would be

IF (conditional_expression) 
    scalar_expression
{ELSE IF (conditional_expression) 
    scalar_expression}*
ELSE
    scalar_expression

And yes, DataNucleus has support for such a construct (unreleased).

> Support for conditional operator ? : in JDOQL
> ---------------------------------------------
>
>                 Key: JDO-650
>                 URL: https://issues.apache.org/jira/browse/JDO-650
>             Project: JDO
>          Issue Type: New Feature
>          Components: specification, tck
>    Affects Versions: JDO 2 maintenance release 2 (2.2)
>            Reporter: Michael Bouschen
>            Assignee: Michael Bouschen
>             Fix For: JDO 3.2
>
>
> JDOQL should support the Java conditional operator ? :, e.g. salay >= 1000.0 ? salary : salary * 1.1
> The conditional operator can be mapped to the CASE-expression in SQL: CASE WHEN condition THEN thenExpr ELSE elseExpr END. Are there any issues with non-SQL datastores when supporting the conditional operator? 
> Another question: which part of a JDOQL query can include a conditional expression? I propose the query filter, the having clause and the result specification.



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