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Posted to dev@lucene.apache.org by "Trejkaz (Created) (JIRA)" <ji...@apache.org> on 2011/11/06 22:47:51 UTC
[jira] [Created] (LUCENE-3565) StandardQueryParser generates
incorrect query for groups containing one term if using default operator
AND
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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[jira] [Commented] (LUCENE-3565) StandardQueryParser generates
incorrect query for groups containing one term if using default operator
AND
Posted by "Trejkaz (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/LUCENE-3565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13145125#comment-13145125 ]
Trejkaz commented on LUCENE-3565:
---------------------------------
I guess another valid result of parsing this query could be:
{code}
BooleanQuery expectedQuery = new BooleanQuery();
expectedQuery.add(new TermQuery(new Term("text", "a")), BooleanClause.Occur.SHOULD);
expectedQuery.add(new TermQuery(new Term("text", "b")), BooleanClause.Occur.SHOULD);
{code}
Which would still keep the spirit of removing single-child boolean queries.
What is actually generated, however, is the same query with MUST for both clauses.
> 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
> Labels: queryparser
>
> 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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