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https://issues.apache.org/jira/browse/OPENJPA-2317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13658329#comment-13658329
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Vermeulen edited comment on OPENJPA-2317 at 5/15/13 2:01 PM:
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Probably a duplicate of OPENJPA-2318 for which I believe I found the solution.
was (Author: slowstrider):
Probably a duplicate of OPENJPA-2317 for which I believe I found the
solution.
> Criteria API doesn' generate LEFT OUTER JOIN in subquery as expected
> --------------------------------------------------------------------
>
> Key: OPENJPA-2317
> URL: https://issues.apache.org/jira/browse/OPENJPA-2317
> Project: OpenJPA
> Issue Type: Bug
> Components: criteria
> Affects Versions: 2.1.1
> Environment: Windows/Oracle
> Reporter: Lev
>
> 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
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