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From "Lev (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OPENJPA-2318) Left outer join is not generated when specifien using Criteria API
Date Sat, 05 Jan 2013 00:52:12 GMT
Lev created OPENJPA-2318:
----------------------------

             Summary: Left outer join is not generated when specifien using Criteria API
                 Key: OPENJPA-2318
                 URL: https://issues.apache.org/jira/browse/OPENJPA-2318
             Project: OpenJPA
          Issue Type: Bug
          Components: criteria
    Affects Versions: 2.1.1
         Environment: Windows/Oracle
            Reporter: Lev


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

	public void setId(String id) {
		this.id = id;
	}

	@ManyToOne(cascade = CascadeType.ALL)
	private DiscoveryObjectImpl parent;
	

	public DiscoveryObjectImpl getParent() {		
		return parent;
	}

	public void setParent(DiscoveryObjectImpl parent) {
		this.parent = parent;  

	}
}

@Entity
public class ColumnFormatImpl extends DiscoveryObjectImpl {
	@Basic
	String formatName; 
}

@Entity
public class ColumnImpl extends DiscoveryObjectImpl {
@OneToMany(mappedBy="parent")
private List<ColumnFormatImpl> formats = new ArrayList<ColumnFormatImpl>();

}

@Entity
public class VirtualTableImpl extends DiscoveryObjectImpl {
@OneToMany(mappedBy="parent")
	private List<ColumnImpl> columns = new ArrayList<ColumnImpl>();
}

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>
 	<class>com.ibm.infosphere.test.model.interfaces.impl.ColumnFormatImpl</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="lev"/>
      		<property name="openjpa.ConnectionPassword" value="lev"/>

            <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>

Test code:
public void test() {
        CriteriaQuery<ColumnImpl> cri = cb.createQuery(ColumnImpl.class);
        Root<VirtualTableImpl> tbl = cri.from(VirtualTableImpl.class);
        Join<VirtualTableImpl, ColumnImpl> col = tbl.join("columns");
        Join<ColumnImpl, ColumnFormatImpl> format = col.join("formats", JoinType.LEFT);
        cri.where(cb.equal(format.get("formatName"), "ABC"));
        cri.select(col);
        em.createQuery(cri).getResultList();
}

Generated SQL:
SELECT t1.id, t1.PARENT_ID 
    FROM VirtualTableImpl t0 INNER JOIN ColumnImpl t1 ON t0.id = t1.PARENT_ID INNER 
        JOIN ColumnFormatImpl t2 ON t1.id = t2.PARENT_ID 
    WHERE (t2.formatName = ? AND 1 = 1) 

As you can see the secong JOIN is INNER instead of LEFT OUTER

        

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