Can a named query return a Vector of ReportQueryResult objects?

TopLink experts,
I would like to know if I can use the method executeQuery() defined in the Session interface to call a predefined named query, which returns a Vector ReportQueryResult objects rather than a Vector of a given domain class objects. If the answer is yes, then how?
Many thanks for the help!

I checked the available types of named queries from TopLink 9.0.4.5 Workbench and the ReportQuery type is not on the list. Only ReadObjectQuery and ReadAllQuery are available in its type dropdown list and both of these types would return an object of the descriptor (or say the domain class) where the named query is defined.
How can I add a ReportQuery type named query to a descriptor in the Workbench? Please help!

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Toplink named query returns maximum 1413 results

Hi all.
As the heading states, I have a Toplink named query that returns 1413 results when it should return 3030. Is this configured somewhere? thanks in advance.

Go to your toplink map in the application navigator, select the descriptor in the structure pane and then click on the "Queries" tab in the editor pane. You should be able to configure your named query there.
Hope this helps.
Anuj

Can't execute SQL Named query that uses connect by...

I'm having problems using the connect by with ReportQuery.setHierarchicalQueryClause (detailed in earlier post) so I defined a named query to execute the following sql;
select distinct(role_id)
from role_principal
connect by prior role_id = principal_id
start with principal_id = #principalId
When I run similar SQL in SqlPlus, i get results like this;
ROLE_ID
202
500
501
502
503
But when I run the query using Toplink like this;
Vector args = new Vector();
args.add(principal.getId());
roles = (Vector) session.executeQuery("orclGetRolesOfPrincipal", args);
I get this exception;
TopLink Warning]: 2005.10.05 10:58:14.362--ClientSession(18082301)--Thread(Thread[main,5,main])--Local Exception Stack:
Exception [TOPLINK-6044] (Oracle TopLink - 10g Developer Preview 3 (10.1.3.0 ) (Build 041116)): oracle.toplink.exceptions.QueryException
Exception Description: The primary key read from the row [DatabaseRecord(
     ROLE_PRINCIPAL.ROLE_ID => 202)] during the execution of the query was detected to be null. Primary keys must not contain null.
Query: ReadAllQuery(oracle.xdo.server.security.authorization.model.RolePrincipalRelation)
     at oracle.toplink.exceptions.QueryException.nullPrimaryKeyInBuildingObject(QueryException.java:662)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:349)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildObjectsInto(ObjectBuilder.java:633)
     at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.buildObjectsFromRows(DatabaseQueryMechanism.java:141)
     at oracle.toplink.queryframework.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:440)
     at oracle.toplink.queryframework.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:727)
     at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:559)
     at oracle.toplink.queryframework.ReadAllQuery.execute(ReadAllQuery.java:408)
     at oracle.toplink.publicinterface.Session.internalExecuteQuery(Session.java:1977)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:973)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:945)
     at oracle.xdo.server.dataservices.impl.toplink.TLDataAccessManagerImpl.getObjects(TLDataAccessManagerImpl.java:346)
It seems to have a problem that there's not a parent record for role_id 202, which is a root level record and so should not have a parent.
I appreciate any help that can be provided.
Thanks,
-Tim Watson

Hello Tim,
Not sure of the problem in the first post, but in this one, you are executing the query as a ReadAllQuery. The results only contain the role_id, but TopLink expecting atleast all the primary key fields inorder to build the objects to return them to you. Try executing this SQL in a report query instead, or set the results to return all the fields so TopLink can build the objects.
Best Regards,
Chris

Query.getSingleResult returns a Vector?

Hallo
I tested on glassfish 2.1 with oracle.toplink.essentials.PersistenceProvider. Running a test with the entitymanager i noticed that getSingleResult returns a vector containing only one element rather than an object that i could cast accordingly.
Looking in the web and also taking a look at the spec all example cast the result directly rather than assuming a vector/list.
Since the specification just wants Object as result type this is not wrong but does that really pass compatibility tests?
regards

You are right it is not nailed down. From my book and various examples i thought that an Object or Object[] was returned and you then cast accordingly but maybe this is only true for hibernate. Since i am bound to toplink in this case i am screwed.
Regarding the additional paramaeter, this also fails, i tried that before:
Query query = em.createNativeQuery("select count(*) from soc",Integer.class); results in [TopLink Warning]: 2010.01.11 06:24:23.070--UnitOfWork(12359283)--Exception [TOPLINK-6007] (Oracle TopLink Essentials - 2.1 (Build b60e-fcs (12/23/2008))): oracle.toplink.essentials.exceptions.QueryException
Exception Description: Missing descriptor for [class java.lang.Integer].
Query: ReadAllQuery(java.lang.Integer)
Exception in thread "main" Local Exception Stack:
Exception [TOPLINK-6007] (Oracle TopLink Essentials - 2.1 (Build b60e-fcs (12/23/2008))): oracle.toplink.essentials.exceptions.QueryException
Exception Description: Missing descriptor for [class java.lang.Integer].
Query: ReadAllQuery(java.lang.Integer)
at oracle.toplink.essentials.exceptions.QueryException.descriptorIsMissing(QueryException.java:419).

Error in return of Vector method

Hi people, I have a problem if a program in runtime: i call a method in a client class named JRSimpleClient and then occur a message of error: NUllPOinterException . let see the server class:
the kind of return is Vector
Vector<Object> myVector = new Vector<Object>(1000);
public Vector getCompleteResult(int id, String searchString) throws
     RemoteException, SQLException {
         jrc[id].performSearch(searchString);
         while (myVector.toString() != " ")
           result= jrc[id].getNextRow();
             myVector.add(result) ;
       return myVector;
      } so the performSearch and nextRow return a query (in database client.mdb)
the client class just call the method above
servlet.getCompleteResult(id,search);if anyone help me i 'll be thankfull.

while (myVector.toString() != " ") This is one of the strangest termination conditions I have ever seen. Are you seriously expecting one space as the only result of the query? Re-examine this.
It means your vector does not contain any value.Why would that cause an NPE?
@OP: can you provide the complete stack trace? Is the NPE happening directly in your client, or is it being thrown to you from the server?

Retrieving array of objects using Named Query

Can i retrieve an array of objects using a Named Query? The execute query method of Session returns only an Object but not an array. Please let me know if there is any possibility.
Thanks in advance,

Hi,
You define a named ReadAllQuery query object, and after query execution, you can cast the returned Object as Vector, and further convert it to an array.
King

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.

How to create olap cube using Named Query Table in Data source View

I Create on OLAP Cube using Existing Tables Its Working Fine But When i Use Named Query Table with RelationShip To other Named query Table It Not Working .So give me some deep Clarification On Olap Cube for Better Understanding
Thanks

Hi Pawan,
What do you mean "It Not Working"？ As Kamath said, please post the detail error message, so that we can make further analysis.
In the Data Source View of a CUBE, we can define a named query. In a named query, you can specify an SQL expression to select rows and columns returned from one or more tables in one or more data sources. A named query is like any other table in a data source
view (DSV) with rows and relationships, except that the named query is based on an expression.
Reference:Define Named Queries in a Data Source View (Analysis Services)
Regards,
Charlie Liao
TechNet Community Support

IN operator in Named Query

hi all,
is it possible to create a named query containing the IN clause if yes how to pass the parameters , i have smth like that:
"select * from tblUsers where employee_number in #param"
what should be the type of the parameter?

You can create a named query using an IN parameter, but you should be careful in doing this as an IN collection is not a valid parameter in SQL. TopLink will handle translating the IN as long as you are using dynamic SQL, or disable the prepare on the query. You can use Vector as the parameter value.
i.e.
ReadAllQuery query = new ReadAllQuery(Employee.class);
query.setSQLString("select * from tblUsers where employee_number in #param");
// Or: query.setSelectionCriteria(query.getExpressionBuilder().get("number").in(query.getExpressionBuilder().getParameter("param")));
query.setShouldPrepare(false);
query.addArgument("param");
Vector args = new Vector();
Vector param = new Vector();
param.add(new Integer(1));
param.add(new Integer(2));
param.add(new Integer(3));
args.add(param);
session.executeQuery(query, args);
// Or: session.executeQuery("findAllWithNumbers", Employee.class, args);

Passing an array of objects to a named query

I'm trying to use a named query that will have a
in() expression operator (clause) to retrieve a set of objects.
The in() operator requires an array of objects to pass in.
Specifically I want to pass an array of BigDecimal of unknown size.
The query looks like that:
ExpressionBuilder seq = new ExpressionBuilder();
Expression exp = seq.get("id").in(keys);
ReadAllQuery query = new ReadAllQuery();
query.setReferenceClass(RegistrationNumberSequencer.class);
query.addArgument("keys");
query.setSelectionCriteria(exp);
And the "keys" would be:
Object[] keys = new Object[2];
keys[0]= new BigDecimal(1);
keys[1]= new BigDecimal(2);
I have got a conversion exception(Could not convert to BigDecimal class) when executing the query.
Can I pass this array as a parameter somehow ?
Thanks a lot
Ovidiu

Hi Ovidiu,
My apologies for the missed code. You need to pass the vector of elements into another vector, so TopLink will interpret the single element of the second vector as the correct query argument, and expend the elements in the first vector into the IN clause.
The named query defined I sent in previous mail is still correct, but you need to pass in the argument like:
Vector keys = new Vector();
keys.addElement(new BigDecimal(1));
keys.addElement(new BigDecimal(2));
Vector arg = new Vector(1);
arg.addElement(keys);
Now you can pass the arg in when executing the query, and should get the correct result.
To stand my claim, I did a mini test using our TopLink Employee demo and here is the generated SQL:
Call:SELECT t0.VERSION, t1.EMP_ID, t0.L_NAME, t0.F_NAME, t1.SALARY, t0.EMP_ID, t0.GENDER, t0.END_DATE, t0.START_DATE, t0.MANAGER_ID, t0.START_TIME, t0.END_TIME, t0.ADDR_ID FROM EMPLOYEE t0, SALARY t1 WHERE ((t0.EMP_ID IN (1, 2)) AND (t1.EMP_ID = t0.EMP_ID))
You can see the IN clause in generated as expected!
As Doug said, we do not officially support array as query argument yet. I would use the proper way to build the query.
King

Creating Named Query: from OracleCallableStatement

We have a great many PL/SQL Procs in an existing legacy system that return PL/SQL Boolean, that we wish to call from toplink.
Ideally we would like to create Toplink Nameded queries that wrap the SQL call statements.
Does anyone know if its possible to convert a call like the following into a Toplink named query?
String domain = "COST CENTRE";
String value = "OP";
OracleCallableStatement xcall = (OracleCallableStatement) con.prepareCall(
"BEGIN ? := SYS.SQLJUTL.bool2int(is_valid_value(?, ?)); END;");
xcall.registerOutParameter( 1, OracleTypes.INTEGER);
xcall.setString(2,domain);
xcall.setString(3,value);
xcall.execute();
System.out.println ("Status = " + xcall.getInt(1));
FUNCTION is_valid_value(
p_rv_domain IN CG_REF_CODES.RV_DOMAIN%TYPE,
p_rv_low_value IN CG_REF_CODES.RV_LOW_VALUE%TYPE
RETURN BOOLEAN
IS
Many thanks,
Lee.

You can define Stored Procedure calls in TopLink through the StoredProcedureCall class. StoredProcedureCall allows you to define output parameters to access return values.
Example:
StoredProcedureCall call = new StoredProcedureCall();
call.setProcedureName("is_valid_value");
call.addNamedArgumentValue("DOMAIN", domain);
call.addNamedArgumentValue("VALUE", value);
call.addNamedOutputArgument("RESULT", "RESULT", Integer.class);
List results = session.executeSelectingCall(call);
boolean value = ((Integer) ((Map) results.get(0)).get("RESULT")).intValue() == 0;
However what you seem to be accessing is a stored function, not a procedure. To access a stored function from TopLink you must use an SQLCall and select the return value through the DUAL table.
Example:
SQLCall call = new SQLCall("Select SYS.SQLJUTL.bool2int(is_valid_value(" + domain + ", " + value + ")) from dual");
List results = session.executeSelectingCall(call);

Using sysdate in a ejb 3.0 named query

Hello,
Giving the following ejb 3 Named query:
@NamedQuery(name = "DcaMessage.findNew", query = "select o from DcaMessage o where o.nbAvisEmis<1 or (o.indMsgConsulte=0 and sysdate-o.dtDernierAvis>:nbJours)")
The result is:
Exception [TOPLINK-8004] (Oracle TopLink Essentials - 2006.8 (Build 060829)): oracle.toplink.essentials.exceptions.EJBQLException
Exception Description: A parsing problem was encountered resolving the alias - [sysdate].
How do I use sysdate (or any other element) to compute the number of days between now and the date defined in dtDernierAvis?
Thanks

Hi,
According to the EJB 3.0 specification, there are three date and time functions that can be used in EQL:
functions_returning_datetime:=
CURRENT_DATE |
CURRENT_TIME |
CURRENT_TIMESTAMP
The datetime functions return the value of current date, time, and timestamp on the database server.
I suppose your query should look like this
@NamedQuery(name = "DcaMessage.findNew", query = "select o from DcaMessage o where o.nbAvisEmis<1 or (o.indMsgConsulte=0 and CURRENT_DATE-o.dtDernierAvis>:nbJours)")
I never used these three functions myself, but it should be something like that.
HTH, Wouter van Reeven

Named query with join tables

I have two tables
- Process_Master (EVENT_ID, EVENT_TYP, STATUS)
- Rel_Event( EVENT_ID, USERID, EVENT_DATE, RMKS)
They have one-to-one relationship linked by EVENT_ID.
I would like to create a named query like below joining 2 tables together.
Do I need to create any class descriptor first and how? I want this query to be available from the ADF data control so I can drag and drop this to my JSP page as a ADF table. I have no problem in working with single table. I have read thru the developer guide and try out many things like multitable info, aggregate mapping and couldn't figure out how this can be done. Please help!!!
SELECT A.EVENT_ID,B.EVENT_DATE, A.STATUS, B.RMKS
FROM PROCESS_MASTER A, REL_EVENT B
WHERE A.EVENT_ID = B.EVENT_ID
AND A.STATUS = 'P';
********/

I have tried the below but fail to retrieve any rows. Please help!
Expression aid = new ExpressionBuilder(ProcEventMaster.class).get("event_id");
Expression bid = new ExpressionBuilder(RelEvent.class).get("event_id");
ReportQuery reportQuery = new ReportQuery(ProcEventMaster.class,aid.equal(bid));
reportQuery.addAttribute("a_id", aid);
reportQuery.addAttribute("b_id", bid);
reportQuery.addAttribute("eventDate",bid.get("event_date"));
reportQuery.addAttribute("remarks",bid.get("rmks"));
reportQuery.setSelectionCriteria(aid.get("status").equal("P"));
List<RelEvent> results =
(List<RelEvent>)session.executeQuery(reportQuery);session.release();
return results;

Named Query or Native Query

Hello,
I am using native query to search for results on my search page. A friend of mine just told me that I better use named query or the time to get my search results will be too slow.
Does Named Query give you faster result than Native Query?
Thanks in advance.
Regards,
Hemen

When you define named queries (note that this is a Hibernate example) you can put them in for example XML,
<query name="findItemsByDescription">
<![CDATA[from Item item where item.description like :desc]]>
</query>or a SQL query like
<sql-query name="findItemsByDescription">
<return alias="item" class="Item"/>
<![CDATA[select {item.*} from item where description like :desc]]>
</sql-query>You can call these queries by using the same code, for example,
session.getNamedQuery("findItemsByDescription").setString("desc", description);This is what is being meant by sharing the same calling API.
When taking about performance. You have to know something about what goes on under the hood.
You have probably programmed something using straightforward JDBC, so you know how to queries
get passed to the driver and send to the database. When using HQL or JPA-QL the queries first have
to be parsed into an SQL language that the database can understand. In this case, we have an extra
parsing step in between. Note that Native SQL queries, including stored procedure calls, the persistence
framework still takes care of mapping the JDBC result sets to graphs of persistent objects.
If you want to include a native SQL hint to instruct the database management systems query optimizer,
for example, you need to write the SQL yourself. HQL and JPA-QL do not have keywords for this.
The disadvantage of putting native SQL in your mapping metadata is lost database portability, because
your mappings, and hence your application, will work only for a particular database. But usually this is of a
minor concern as you are probably not creating a framework that has to work on every database.
When you want to get behind the performance of your query, you really have to consult the database
and look at the execution plan - A DBA can tell you exactly what is good and what can be optimized.

Named query gives a null argument exception in JPQL

Hi all,
I need your help with a named query which i have which returns a org.apache.openjpa.persistence.ArgumentException: null .
Here is my named query:
@NamedQuery(name="user_deactivateUser", query="update UserImpl u SET u.bisdeleted=1,u.dtupdatedate=SYSDATE, u.dtdeletedate=SYSDATE where u.nID=?1" Now when i call this query in my method it gives an null pointer exception at q.executeUpdate().
public void doDeactivateAllUsers(int userID) throws ServiceException{
EntityManager em = null;
em = BaseDAO.getEntityManager();
Query q = em.createNamedQuery("user_deactivateUser");
               q.setParameter(1,userID);
               int count = q.executeUpdate();here is the full stack trace of this exception.
<openjpa-1.2.1-r752877:753278 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: null
     at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:814)
     at org.apache.openjpa.kernel.QueryImpl.updateAll(QueryImpl.java:884)
     at org.apache.openjpa.kernel.DelegatingQuery.updateAll(DelegatingQuery.java:573)
     at org.apache.openjpa.persistence.QueryImpl.executeUpdate(QueryImpl.java:336)
     at com.forrester.companyadmin.service.DeactivateUserService.doDeactivateUser(DeactivateUserService.java:98)
     at com.forrester.companyadmin.service.DeactivateUserService.doDeactivateAllUsers(DeactivateUserService.java:225)
     at com.forrester.companyadmin.controller.DeactivateUsersController.action(DeactivateUsersController.java:376)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:146)
     at javax.faces.component.UICommand.broadcast(UICommand.java:325)
     at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:287)
     at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:401)
     at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at com.forrester.companyadmin.filters.CompanyAdminFilter.doFilter(CompanyAdminFilter.java:102)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:465)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
     at java.lang.Thread.run(Unknown Source).
Can someone let me know if there is anything wrong in the way iam passing these parameteres
Edited by: user8769643 on Mar 19, 2010 7:37 AM

i got this working. I am passing dtupdate=SYSDATE which is incorrect. i added one more parameter "q.setParameter(3,new java.util.Date())" to pass today's date and it worked.
Thanks

Can a named query return a Vector of ReportQueryResult objects?

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