[OPENJPA-2317] Criteria API doesn' generate LEFT OUTER JOIN in subquery as expected

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.1.1
• Component/s: criteria
• Environment: Windows/Oracle
• Assignee: Unassigned
• Reporter: Lev
• Created: 04/Jan/13 21:28
• Updated: 15/May/13 14:01

Description

I have 3 entity classes classes

@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public class DiscoveryObjectImpl implements DiscoveryObject {
@Id
private String id;
public String getId()

{ return id; }

public void setId(String id)

{ this.id = id; }

}
@Entity
public class VirtualTableImpl extends DiscoveryObjectImpl {
@OneToMany(mappedBy="table")
private List<ColumnImpl> column = new ArrayList<ColumnImpl>();
}
@Entity
public class ColumnImpl extends DiscoveryObjectImpl {
@ManyToOne(cascade = CascadeType.PERSIST, optional=true)
VirtualTableImpl table;
}

test code
public void test() {
EntityManager em = OpenJPAPersistence.createEntityManagerFactory("Test", "test/persistence.xml").createEntityManager();
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<VirtualTableImpl> cri = cb.createQuery(VirtualTableImpl.class);
Root<VirtualTableImpl> tbl = cri.from(VirtualTableImpl.class);
Subquery<Integer> sq = cri.subquery(Integer.class);
Root<VirtualTableImpl> tbl1 = sq.from(VirtualTableImpl.class);
Path<ColumnImpl> cols = tbl1.join("column", JoinType.LEFT);
sq.where(cb.isNull(cols), cb.equal(tbl1, tbl));
sq.select(cb.literal(new Integer(1)));
cri.where(cb.exists(sq));
em.createQuery(cri).getResultList();
}

persistence.xml
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
version="1.0">
<persistence-unit name="Test" transaction-type="RESOURCE_LOCAL">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<class>com.ibm.infosphere.test.model.interfaces.impl.DiscoveryObjectImpl</class>
<class>com.ibm.infosphere.test.model.interfaces.impl.VirtualTableImpl</class>
<class>com.ibm.infosphere.test.model.interfaces.impl.ColumnImpl</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="openjpa.Log" value="DefaultLevel=ERROR, Runtime=ERROR, Tool=ERROR, SQL=TRACE, MetaData=ERROR"/>
<property name="openjpa.DynamicEnhancementAgent" value="false"/>
<property name="openjpa.RuntimeUnenhancedClasses" value="supported"/>
<property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/>
<property name="openjpa.InitializeEagerly" value="true"/>
<property name="openjpa.jdbc.DBDictionary" value="oracle"/>
<property name="openjpa.jdbc.DBDictionary" value="MaxTableNameLength=61"/>
<property name="openjpa.jdbc.DBDictionary" value="useWildCardForCount=true"/>
<property name="openjpa.jdbc.DBDictionary" value="JoinSyntax=sql92"/>
<property name="openjpa.ConnectionURL" value="jdbc:oracle:thin:@localhost:1521:orcl"/>

<property name="openjpa.ConnectionDriverName" value="oracle.jdbc.driver.OracleDriver"/>
<property name="openjpa.ConnectionUserName" value="********"/>
<property name="openjpa.ConnectionPassword" value="*********"/>

<property name="openjpa.ConnectionFactoryProperties" value="PrettyPrint=true, PrettyPrintLineLength=80, PrintParameters=true"/>
<property name="openjpa.DataCache" value="true"/>
<property name="openjpa.RemoteCommitProvider" value="sjvm"/>
<property name="openjpa.jdbc.QuerySQLCache" value="true(EnableStatistics=true)"/>
</properties>
</persistence-unit>
</persistence>

The SQL trace is as the following SELECT t2.id
FROM VirtualTableImpl t2
WHERE (EXISTS (SELECT ? FROM VirtualTableImpl t0 INNER JOIN ColumnImpl t1 ON
t0.id = t1.TABLE_ID WHERE (t1.id IS NULL AND t0.id = t2.id)))

Please note that sub query contains INNER JOIN instead of LEFT OUTER JOIN

Issue Links

• duplicates: OPENJPA-2318 Left outer join is not generated when specifien using Criteria API