[overlord-issues] [JBoss JIRA] (ARTIF-202) The not() function doesn't quite work with relationships

[Brett Meyer (JIRA)]

    [ https://issues.jboss.org/browse/ARTIF-202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13037731#comment-13037731 ] 

Brett Meyer commented on ARTIF-202:
-----------------------------------

https://developer.jboss.org/message/917831

> The not() function doesn't quite work with relationships
> --------------------------------------------------------
>
>                 Key: ARTIF-202
>                 URL: https://issues.jboss.org/browse/ARTIF-202
>             Project: Artificer
>          Issue Type: Bug
>            Reporter: Eric Wittmann
>            Assignee: Brett Meyer
>            Priority: Minor
>
> The not() function works well with properties, but not quite with relationships.  An example of what doesn't work:
> /s-ramp/wsdl/Part[not(element)]
> That should return all Parts that do *not* have an element relationship.  Since relationships are found by doing a JOIN, it's actually tricky to invert.  Right now I think the query engine will produce something that would return all Parts that have some *other* relationship - but it won't return Parts without any relationships at all.  I'm not sure how to do the latter other than by using an IN with a subquery (which is supported by ModeShape but is non-standard).



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