[JENA-1298] GROUP BY can cause a warning from QueryIteratorCheck.

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Jena 3.2.0
• Fix Version/s: Jena 3.3.0
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 01/Mar/17 14:07
• Updated: 10/May/17 15:35
• Resolved: 01/Mar/17 15:51

Description

Example:

public class CheckQueryIterator {

    public static void main(String... args) {
        String queryStr = "SELECT ?s { } GROUP BY ?s";
        Query query = QueryFactory.create(queryStr);
        Model model = ModelFactory.createDefaultModel();
        try(QueryExecution qe = QueryExecutionFactory.create(query, model)) {
            ResultSet rs = qe.execSelect();
            // Do not "hasNext"
            //rs.hasNext();
        }
    }

Key feature: not touching the "group", going straight to QueryExecution.close().

This does not cause any incorrect query results.