[jira] [Assigned] (JENA-1203) projecting non grouped variable in subquery is incorrectly allowed

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

     [ https://issues.apache.org/jira/browse/JENA-1203?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Seaborne reassigned JENA-1203:
-----------------------------------

    Assignee: Andy Seaborne

> projecting non grouped variable in subquery is incorrectly allowed
> ------------------------------------------------------------------
>
>                 Key: JENA-1203
>                 URL: https://issues.apache.org/jira/browse/JENA-1203
>             Project: Apache Jena
>          Issue Type: Bug
>         Environment: sparql.org's validator
>            Reporter: Joshua Taylor
>            Assignee: Andy Seaborne
>            Priority: Minor
>
> Described in this Stack Overflow answer, http://stackoverflow.com/a/38104783/1281433 :
> {code}
> SELECT ?sub ?pred ?obj (count(?obj) as ?count)
>     WHERE { ?sub ?pred ?obj .
>         } GROUP BY ?sub
> {code}
> is illegal, because there are non-grouped variables in the projection (?pred, ?obj).  However, when this query appears as a subquery, no syntax error is reported, as in:
> {code}
> DELETE { ?sub ?pred ?obj . } 
> WHERE {  
>     {SELECT ?sub ?pred ?obj (count(?obj) as ?count)
>     WHERE { ?sub ?pred ?obj .
>         } GROUP BY ?sub
>     } FILTER(?count < 14)
> }
> {code}



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