Named Query Syntax

Hi,
Can any one send me syntax for named query for the following scnerio?
Table name : EMP
Columns: EMP_CODE,EMP_NAME,DEPT_CODE
and I need to select all rows from EMP for a specific DEPT_CODE.
My query should look like
"select emp.emp_code,emp.emp_name from Emp as emp where emp.dept_code=:dept_code"
but I need exact syntax.
plz help.

I found the solution as follows
List list = em.createQuery(query).setParameter("dept_Code",dept_code).getResultList();
Simple. :)

Similar Messages

JDQL named query syntax error

Hi,
we have a syntax error in our JDOQL-namedQuery. We want to do a join over
two tables "TestOrder" and "TestOrderPosition" and get this error:
(we use Kodo 4.0)
<?xml version="1.0"?>
<jdoquery>
<package name="salt.domain.orderservice.entity">
<class name = "TestOrder">
     <query name="findByOrderId">select where
testOrderPositions.contains(testOrderPosition) and
testOrderPosition.description==:t variables
salt.domain.orderservice.entity.TestOrderPosition testOrderPosition</query>
</class>
</package>
</jdoquery>
<4|false|4.0.0EA3> kodo.jdo.UserException: An error occurred while parsing the
query filter "testOrderPositions.contains(testOrderPosition) and
testOrderPosition.description==:t". Error message: The JDOQL string is not
valid. Make sure all parentheses are matched and that you use proper Java
syntax.
     kodo.query.AbstractExpressionBuilder.parseException(AbstractExpressionBuilder.java:92)
     kodo.query.jdoql.JDOQLExpressionBuilder.evalExpression(JDOQLExpressionBuilder.java:508)
     kodo.query.jdoql.JDOQLExpressionBuilder.eval(JDOQLExpressionBuilder.java:265)
     kodo.query.jdoql.JDOQLParser.eval(JDOQLParser.java:98)
     kodo.query.ExpressionStoreQuery$DataStoreExecutor.<init>(ExpressionStoreQuery.java:542)
     kodo.query.ExpressionStoreQuery.newDataStoreExecutor(ExpressionStoreQuery.java:154)
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     kodo.query.QueryImpl.compileForExecutor(QueryImpl.java:721)
     kodo.query.QueryImpl.compile(QueryImpl.java:635)
     kodo.kernel.BrokerImpl.namedQuery(BrokerImpl.java:3681)
     kodo.kernel.DelegatingBroker.namedQuery(DelegatingBroker.java:1587)
     kodo.jdo.PersistenceManagerImpl.newNamedQuery(PersistenceManagerImpl.java:1028)
     salt.domain.orderservice.dao.jdo.JDOOrderRepositoryImpl.findOrderWithPositionById(JDOOrderRepositoryImpl.java:85)
     salt.domain.orderservice.OrderRepositoryImpl.findOrderWithPositions(OrderRepositoryImpl.java:91)
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     sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
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Does anyone have an idea?
Thanks,
Ingo Schneider

Thanks for your help! It works now!
I have another problem with a very simple query:
I always get a ClassCastException with the follwoing query. If I left the
result parameter out the query works. Parameter "t" is an integer, but
there shouldn't be any cast problems between integer and long.
<?xml version="1.0"?>
<jdoquery>
     <package name="salt.domain.orderservice.entity">
          <class name="TestOrder">
     <query name="findByOrderIdPosition">select idOrder where
idOrder==:t</query>
</class>
</package>
</jdoquery>
public class TestOrder implements Serializable{
     private String description;
     private long idOrder;
     private Set testOrderPositions = new HashSet();
getters & setters...
java.lang.ClassCastException: java.lang.Long
     salt.domain.orderservice.dao.jdo.JDOOrderRepositoryImpl.findOrderWithPositionById(JDOOrderRepositoryImpl.java:99)
     salt.domain.orderservice.OrderRepositoryImpl.findOrderWithPositions(OrderRepositoryImpl.java:91)
     salt.domain.orderservice.OrderServiceImpl.getOrderWithPosition(OrderServiceImpl.java:15)
     sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     java.lang.reflect.Method.invoke(Unknown Source)
     org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:335)
     org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:181)
     org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:148)
     org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
     org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
     org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
     $Proxy0.getOrderWithPosition(Unknown Source)
     salt.application.DddTestController.handleRequest(DddTestController.java:40)
     org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:44)
     org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:717)
     org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:658)
     org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:392)
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Thanks,
Ingo Schneider

How to write named query if we want to use IN syntax in our sql statement?

I cannot find a suitable category about named query, so please move to appropriate place if there is any.
When we write named query, below statement is fine.
Query q2 = em.createQuery("SELECT o FROM Table1 as o WHERE field1 = :input1");             q2.setParameter("input1", "value1");
Now, my question is, how can I write this type of query when we want to use the IN sql syntax? As below statement CANNOT return correct results. Even I tried to put a pair of single quote [ ':input2' ], it won't help also.
Query q2 = em.createQuery("SELECT o FROM Table1 as o WHERE field2 IN (:input2)");             q2.setParameter("input1", "3633, 3644");
Can anyone suggest? Thanks.

roamer wrote:
Now, my question is, how can I write this type of query when we want to use the IN sql syntax? As below statement CANNOT return correct results. Even I tried to put a pair of single quote [ ':input2' ], it won't help also.
Query q2 = em.createQuery("SELECT o FROM Table1 as o WHERE field2 IN (:input2)");
q2.setParameter("input1", "3633, 3644");
Can anyone suggest?The above is in your code right? Not in some configuration file?
Then you do it the same way as with regular jdbc/sql.
1. You start with a collection of values - call it collection A.
1. Create a for loop that dynamically creates the string using 'bind' variables (whatever you want to call the 'colon' entity in the above).
2. Call the createQuery method using the string that was created
3. Create a second loop that iterates over A and populates with setParameter.
Pseudo code
        Object[] A = ...
        String sql = "SELECT o FROM Table1 as o WHERE field2 IN (";
        for (int i=1; i <= A.length; i++)
              if (i == 1)
                 sql += ":input" + i;
             else
                 sql += ",:input" + i;
        sql += ")";
        Query q2 = em.createQuery(sql);
        for (int i=1; i <= A.length; i++
              q2.setParameter("input" + i, A[i-1]);
              }By the way there is a jdbc forum.

AVG calculation and syntax error while parsing a named query

Hi all,
I've to calcolate the average of polling results for each value column (5 value column in total). I want to use this single row result line for a bar graph.
I created a new named query in the EJB:
@NamedQueries({
@NamedQuery(name = "Polls.findAll", query = "select o from Polls o"),
@NamedQuery(name = "Polls.findAVG", query = "select o AVG(Value1) as Value1, AVG(Value2) as Value2, AVG(Value3) as Value3, AVG(Value4) as Value4, AVG(Value5) as Value5 o from Polls o")   // <-- my named query
...I tried it in the sql query tool of Oracle 10g XE and sql syntax is ok, but when I run my javaServiceFacade on JDev I receive this message:
Exception in thread "main" Local Exception Stack:
Exception [EclipseLink-8023] (Eclipse Persistence Services - 1.0.1 (Build 20080905)): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Syntax error parsing the query [Polls.findAVG: select AVG(Value1) as Value1, AVG(Value2) as Value2, AVG(Value3) as Value3, AVG(Value4) as Value4, AVG(Value5) as Value5 o from Polls o].
Internal Exception: org.eclipse.persistence.internal.libraries.antlr.runtime.EarlyExitException
...Where is the syntax error in my named query?
Edited by: Silicio on 22-nov-2008 1.05

Thanks Shay, now I think syntax is correct for gain an average for each column:
@NamedQuery(name = "Polls.findAVG", query = "select AVG(o.value1), AVG(o.value2), AVG(o.value3), AVG(o.value4), AVG(o.value5) from Polls o")But still got some trouble to get a bar graph...
If I drag&drop that query from data control, I get an empty graph with 5 values ,look http://img153.imageshack.us/img153/8710/emptygraphag7.png .
In the log there is some errors (due that named query and its methods in EJB):
AVVERTENZA: Transient state added to StateManager. State may not be serialized. State id: data.oracle_view_risultatiPageDef.Polls1__cubicDefinition
23-nov-2008 11.08.28 oracle.adf.share.http.HttpSessionStateManagerImpl putState
AVVERTENZA: Transient state added to StateManager. State may not be serialized. State id: data.oracle_view_risultatiPageDef.Polls1__dataModel
[EL Info]: 2008.11.23 11:08:29.546--ServerSession(20936795)--EclipseLink, version: Eclipse Persistence Services - 1.0.1 (Build 20080905)
[EL Info]: 2008.11.23 11:08:29.562--ServerSession(20936795)--Server: WebLogic Server Temporary Patch for CR380042 Thu Sep 11 13:33:40 PDT 2008
[EL Info]: 2008.11.23 11:08:29.562--ServerSession(20936795)--file:/C:/Oracle/Middleware/jdeveloper/system/system11.1.1.0.31.51.56/o.j2ee/drs/Application13/Application13-Model-ejb/-Model login successful
23-nov-2008 11.08.37 oracle.adfinternal.view.faces.config.rich.RegistrationConfigurator handleError
GRAVE: Server Exception during PPR, #1
oracle.jbo.JboException: JBO-29000: Unexpected exception caught: groovy.lang.MissingPropertyException, msg=Exception evaluating property 'id' for java.util.Arrays$ArrayList, Reason: groovy.lang.MissingPropertyException: No such property: id for class: java.lang.Double
     at oracle.jbo.ExprEval.internalEvaluateGroovyScript(ExprEval.java:753)
     at oracle.jbo.ExprEval.doEvaluate(ExprEval.java:779)
     at oracle.jbo.ExprEval.evaluateForRow(ExprEval.java:690)
     at oracle.jbo.server.AttributeDefImpl.evaluateTransientExpression(AttributeDefImpl.java:1816)
     at oracle.jbo.server.ViewRowStorage.getAttributeInternal(ViewRowStorage.java:1554)
     at oracle.jbo.server.ViewRowImpl.getAttributeValue(ViewRowImpl.java:1634)
     at oracle.jbo.server.ViewRowImpl.getAttributeInternal(ViewRowImpl.java:746)
     at oracle.adf.model.bean.DCDataRow.getAttributeInternal(DCDataRow.java:352)
     at oracle.jbo.server.ViewRowImpl.getKey(ViewRowImpl.java:598)
     at oracle.adf.model.bean.DCDataRow.getKey(DCDataRow.java:149)
     at oracle.adf.model.binding.DCIteratorBinding.buildFormToken(DCIteratorBinding.java:3836)
     at oracle.adf.model.binding.DCBindingContainerState.buildStringBuffer(DCBindingContainerState.java:71)
     at oracle.adf.model.binding.DCBindingContainerState.toString(DCBindingContainerState.java:590)
     at oracle.adf.model.binding.DCBindingContainer.getStateToken(DCBindingContainer.java:4293)
     at oracle.adfinternal.controller.application.model.SaveStateTokenListener.afterPhase(SaveStateTokenListener.java:54)
     at oracle.adfinternal.controller.lifecycle.ADFLifecycleImpl$PagePhaseListenerWrapper.afterPhase(ADFLifecycleImpl.java:529)
     at oracle.adfinternal.controller.lifecycle.LifecycleImpl.internalDispatchAfterEvent(LifecycleImpl.java:118)
     at oracle.adfinternal.controller.lifecycle.LifecycleImpl.dispatchAfterPagePhaseEvent(LifecycleImpl.java:166)
     at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$PhaseInvokerImpl.dispatchAfterPagePhaseEvent(ADFPhaseListener.java:122)
     at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.afterPhase(ADFPhaseListener.java:68)
     at oracle.adfinternal.controller.faces.lifecycle.ADFLifecyclePhaseListener.afterPhase(ADFLifecyclePhaseListener.java:51)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:354)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:203)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
     at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
     at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
     at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:181)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:85)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:278)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:238)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:195)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:138)
     at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at oracle.security.jps.wls.JpsWlsFilter.doFilter(JpsWlsFilter.java:102)
     at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:65)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3496)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(Unknown Source)
     at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
     at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
     at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
Caused by: groovy.lang.MissingPropertyException: Exception evaluating property 'id' for java.util.Arrays$ArrayList, Reason: groovy.lang.MissingPropertyException: No such property: id for class: java.lang.Double
     at org.codehaus.groovy.runtime.DefaultGroovyMethods.getAt(DefaultGroovyMethods.java:2978)
     at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:1368)
     at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:2578)
     at org.codehaus.groovy.runtime.InvokerHelper.getProperty(InvokerHelper.java:178)
     at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.getProperty(ScriptBytecodeAdapter.java:474)
     at Script1.run(Script1.groovy)
     at oracle.jbo.ExprEval.internalEvaluateGroovyScript(ExprEval.java:741)
     ... 50 more
## Detail 0 ##
groovy.lang.MissingPropertyException: Exception evaluating property 'id' for java.util.Arrays$ArrayList, Reason: groovy.lang.MissingPropertyException: No such property: id for class: java.lang.Double
     at org.codehaus.groovy.runtime.DefaultGroovyMethods.getAt(DefaultGroovyMethods.java:2978)
     at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:1368)
     at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:2578)
     at org.codehaus.groovy.runtime.InvokerHelper.getProperty(InvokerHelper.java:178)
     at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.getProperty(ScriptBytecodeAdapter.java:474)
     at Script1.run(Script1.groovy)
     at oracle.jbo.ExprEval.internalEvaluateGroovyScript(ExprEval.java:741)
     at oracle.jbo.ExprEval.doEvaluate(ExprEval.java:779)
     at oracle.jbo.ExprEval.evaluateForRow(ExprEval.java:690)
     at oracle.jbo.server.AttributeDefImpl.evaluateTransientExpression(AttributeDefImpl.java:1816)
     at oracle.jbo.server.ViewRowStorage.getAttributeInternal(ViewRowStorage.java:1554)
     at oracle.jbo.server.ViewRowImpl.getAttributeValue(ViewRowImpl.java:1634)
     at oracle.jbo.server.ViewRowImpl.getAttributeInternal(ViewRowImpl.java:746)
     at oracle.adf.model.bean.DCDataRow.getAttributeInternal(DCDataRow.java:352)
     at oracle.jbo.server.ViewRowImpl.getKey(ViewRowImpl.java:598)
     at oracle.adf.model.bean.DCDataRow.getKey(DCDataRow.java:149)
     at oracle.adf.model.binding.DCIteratorBinding.buildFormToken(DCIteratorBinding.java:3836)
     at oracle.adf.model.binding.DCBindingContainerState.buildStringBuffer(DCBindingContainerState.java:71)
     at oracle.adf.model.binding.DCBindingContainerState.toString(DCBindingContainerState.java:590)
     at oracle.adf.model.binding.DCBindingContainer.getStateToken(DCBindingContainer.java:4293)
     at oracle.adfinternal.controller.application.model.SaveStateTokenListener.afterPhase(SaveStateTokenListener.java:54)
     at oracle.adfinternal.controller.lifecycle.ADFLifecycleImpl$PagePhaseListenerWrapper.afterPhase(ADFLifecycleImpl.java:529)
     at oracle.adfinternal.controller.lifecycle.LifecycleImpl.internalDispatchAfterEvent(LifecycleImpl.java:118)
     at oracle.adfinternal.controller.lifecycle.LifecycleImpl.dispatchAfterPagePhaseEvent(LifecycleImpl.java:166)
     at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$PhaseInvokerImpl.dispatchAfterPagePhaseEvent(ADFPhaseListener.java:122)
     at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.afterPhase(ADFPhaseListener.java:68)
     at oracle.adfinternal.controller.faces.lifecycle.ADFLifecyclePhaseListener.afterPhase(ADFLifecyclePhaseListener.java:51)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:354)
     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:203)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
     at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
     at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
     at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
     at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:181)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:85)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:278)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:238)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:195)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:138)
     at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at oracle.security.jps.wls.JpsWlsFilter.doFilter(JpsWlsFilter.java:102)
     at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:65)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3496)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(Unknown Source)
     at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
     at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
     at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)I try to print out a singlue AVG value in this way (main method of javaServerFacade class):
    public static void main(String [] args) {
        final JavaServiceFacade javaServiceFacade = new JavaServiceFacade();
        // TODO: Call methods on javaServiceFacade here...
        List<Polls> pollsAVG = javaServiceFacade.queryPollsFindAVG();
        for (Polls a: pollsAVG){
            System.out.println(a.getValue1());
...I get this error:
Exception in thread "main" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to oracle.model.Polls
     at oracle.model.JavaServiceFacade.main(JavaServiceFacade.java:25)
Process exited with exit code 1.
...I've searched for Ljava in the documantation finding nothing interesting.

Derby db named query causes parse error when using derby db MONTH function

Hi all!
I'm trying to create an application using the persistance api and beans binding. I have created my database and entity classes.
My problem is creating a named query that uses some of the functionality from the derby database (which is embedded in the application).
I have a named query:
@NamedQuery(name = "Vehicles.findbymotmonth", query = "SELECT v FROM Vehicles v WHERE MONTH(v.lastmotdate) = :monthnumber") The actual query works fine when I send it directly to the db (with the parameter filled in) but causes an exception when used as a named query:
Local Exception Stack:
Exception [TOPLINK-8025] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EJBQLException
Exception Description: Syntax error parsing the query [Vehicles.findbymotmonth: SELECT v FROM Vehicles v WHERE MONTH(v.lastmotdate) = :monthnumber], line 1, column 32: unexpected token [MONTH].
Internal Exception: line 1:32: unexpected token: MONTH
at oracle.toplink.essentials.exceptions.EJBQLException.unexpectedToken(EJBQLException.java:389)
... I've tried looking for solutions online but it seems evryone just writes up the original java db application example provided by sun and no one has tried doing more than "select c from customers c".
I'm using the netbeans ide (6.5).
Please tell me there is a simple solution to this and the persistance API can handle complex queries!
Thanks in advance.

one solution: assume the toplink library to be so full of bugs as to be unusable and switch to the hibernate persistance manager where it works fine.
Edited by: pointer2null on Feb 17, 2009 11:02 AM

Limiting records in a named query

Hello,
I can retrieve all the records using the following named query:
<named-query name="emploee.findemployees">
<query>select e from employee e </query>
</named-query>
Can somebody help me how i can retrieve only the first 5 records using the named queries?
Thank you in advance,
Reddy

Thanks for the tip vijaykumar. Your tip helped me to go further.
TOP keyword only seem to work with SQLServer 7.0 and above.
We are using MySQL. So the equivalent syntax in MySQL is
Select * from employee LIMIT 0,5.
This query works fine in my MySQL Query Browser. But it does not work with Hibernate. Does anybody know how to make this query work with Hibernate?
Thanks in advance,
Reddy

[JPA] SELECT NEW inside SELECT NEW in Named Query

Suppose i have two JPA entities Master and Detail as follows:
@Entity
public class Master implements Serializable{
    private static final long serialVersionUID = 1L;
    private long id;
    private String masterField1;
    private String masterField2;
    private String masterField3;
     private String masterField4;
    private String masterField5;
    //A lot of other fields till masterFieldn...
    private String masterFieldn;
    private List<Detail> detailList;
    //getters and setters here...
    @OneToMany(mappedBy = "master", cascade = { CascadeType.ALL }, fetch=FetchType.EAGER)
    @OrderBy("detailField1 DESC")
    public List<Detail> getDetailList() {
        return detailList;
@Entity
public class Detail implements Serializable{
    private static final long serialVersionUID = 1L;
    private long id;
    private String detailField1;
    private String detailField2;
    private String detailField3;
     private String detailField4;
    private String detailField5;
    //A lot of other fields till detailFieldn...
    private String detailFieldn;
    private Master master;
    //getters and setters here...
    @ManyToOne
    @JoinColumn(name="MASTER_ID", referencedColumnName="ID")    public Master getMaster() {
        return master;
    }Both Master and Detail entities have a lot of fields, but i only need a subset of those fields when these entities are queried. So, i have two helper classes which i use in named queries in Master JPA entity :
@NamedQueries({
        @NamedQuery(name = "Master.findMaster",
            query = "SELECT NEW MasterHelper(" +
                "t.masterField1, t.masterField2, t.masterField3, " +
                " SELECT NEW DetailHelper(" +
                "td.detailField1, td.detailField2, td.detailField3 FROM Detail td WHERE " +
                " td.master.id = t.id)) FROM Master t WHERE t.id = ?1")MasterHelper and DetailHelper have only the fields i want to query, getters and setters, and a constructor matching the SELECT NEW.. in @NamedQuery :
public class MasterHelper implements java.io.Serializable {
    private String field1;
    private String field2;
    private String field3;
    private <DetailHelper> detailList;
    //Constructor matching SELECT NEW
    public MasterHelper(String field1, String field2, String Field3, List detailList) {
       this.field1 = field1;
        this.field2 = field2;
        this.field3 = field3;
        this.detailList = detailList;
     //getters and setters
public class DetailHelper implements java.io.Serializable {
    private String field1;
    private String field2;
    private String field3;
    //Constructor matching SELECT NEW
    public DetailHelper(String field1, String field2, String Field3) {
       this.field1 = field1;
        this.field2 = field2;
        this.field3 = field3;
     //getters and setters
}So, basically when i query for a particular Master entity, what i want in return is a List of MasterHelper objects with just the fields i want; each MasterHelper object must include a list of MasterDetail objects, again with just the fields i want.
When the above named query is executed by Toplink Essentials against an Oracle database, i get the following exception regarding the "second" SELECT NEW:
EJBQLException
Exception Description: Syntax error parsing the query [SELECT NEW
...unexpected token [SELECT]
...How can i achieve what i want? Doesn't JPA allows SELECT NEW inside SELECT NEW in named queries?
Thanks in advance for any help.
Edited by: savas_karabuz on May 16, 2008 3:59 AM
Edited by: savas_karabuz on May 16, 2008 4:02 AM

Hello,
The build you are using is an older one, and there have been a few enhancements done for constructor expressions support (for instance
https://glassfish.dev.java.net/issues/show_bug.cgi?id=1421)
but an enhancement to allow constant values is still open: https://glassfish.dev.java.net/issues/show_bug.cgi?id=2452
Best Regards,
Chris

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