[jira] [Comment Edited] (JENA-971) QueryBuilder does not properly construct UNIONs

[Andy Seaborne (JIRA)]

    [ 
https://issues.apache.org/jira/browse/JENA-971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14623556#comment-14623556
 ] 

Andy Seaborne edited comment on JENA-971 at 7/12/15 9:08 AM:
-------------------------------------------------------------

But I now get this illegal query;

{noformat}
SELECT  *
WHERE
  { ?s  ?p  ?o
    UNION
      { SELECT  ?s ?p ?o
        WHERE
          { ?s  ?p  ?o }
      }
  }
{noformat}
which should be:
{noformat}
SELECT  *
WHERE
  { { ?s  ?p  ?o }
    UNION
      { SELECT  ?s ?p ?o
        WHERE
          { ?s  ?p  ?o }
      }
  }
{noformat}
each side of the UNION is a  ElementGroup.


was (Author: claudenw):
But I now get this illegal query;

SELECT  *
WHERE
  { ?s  ?p  ?o
    UNION
      { SELECT  ?s ?p ?o
        WHERE
          { ?s  ?p  ?o }
      }
  }

which should be:

SELECT  *
WHERE
  { { ?s  ?p  ?o }
    UNION
      { SELECT  ?s ?p ?o
        WHERE
          { ?s  ?p  ?o }
      }
  }

each side of the UNION is a  ElementGroup.

> QueryBuilder does not properly construct UNIONs
> -----------------------------------------------
>
>                 Key: JENA-971
>                 URL: https://issues.apache.org/jira/browse/JENA-971
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: Jena
>    Affects Versions: Jena 2.13.1, Jena 3.0.0
>            Reporter: Claude Warren
>            Assignee: Claude Warren
>             Fix For: Jena 2.13.1, Jena 3.0.0
>
>
> The QueryBuilder method addUnion() always adds a new union to the query 
> pattern.  It should only add one if the last element in the query pattern is 
> not a union.



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