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From "Trejkaz (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-3565) StandardQueryParser generates incorrect query for groups containing one term if using default operator AND
Date Sun, 06 Nov 2011 21:47:51 GMT
StandardQueryParser generates incorrect query for groups containing one term if using default
operator AND
----------------------------------------------------------------------------------------------------------

                 Key: LUCENE-3565
                 URL: https://issues.apache.org/jira/browse/LUCENE-3565
             Project: Lucene - Java
          Issue Type: Bug
          Components: modules/queryparser
    Affects Versions: 3.4
            Reporter: Trejkaz


The following test demonstrates a bug in StandardQueryParser when DEFAULT_OPERATOR is set
to AND:

{code}
    @Test
    public void testDefaultOperatorSingleGrouped() throws Exception
    {
        StandardQueryParser parser = new StandardQueryParser();
        parser.getQueryConfigHandler().set(StandardQueryConfigHandler.ConfigurationKeys.DEFAULT_OPERATOR,
StandardQueryConfigHandler.Operator.AND);

        BooleanQuery expectedQuery = new BooleanQuery();
        BooleanQuery innerQuery1 = new BooleanQuery();
        innerQuery1.add(new TermQuery(new Term("text", "a")), BooleanClause.Occur.MUST);
        expectedQuery.add(innerQuery1, BooleanClause.Occur.SHOULD);
        BooleanQuery innerQuery2 = new BooleanQuery();
        innerQuery2.add(new TermQuery(new Term("text", "b")), BooleanClause.Occur.MUST);
        expectedQuery.add(innerQuery2, BooleanClause.Occur.SHOULD);
        Query actualQuery = parser.parse("(a) OR (b)", "text");

        assertEquals("Wrong query was generated", expectedQuery, actualQuery);
    }
{code}

BooleanSingleChildOptimizationQueryNodeProcessor appears to be responsible because if I remove
it, the correct query is generated (however, doing so breaks a number of other tests of our
own.)


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