Named Query Expression in Toplink workbench

Hi! All,
I have a problem which I am not sure how to solve and would appreciate any help on this.
I have Tables
Company, Employee, EmployeeTaxType , TaxTypeVal
Each is mapped to a java class with the same name
I would like to find all Employee Objects for a company where (taxTypeVal.year=2005 and taxType.quarter=2)
I cant seem to be able to build a Named Query expression which would produce the same result.
It always returns All employees who belong to a company and have liabilities in either year =2005 OR quarter=2
The expression that I wrote was
AND
1.companyBO.companyID EQUAL COMPANY_ID
2.AND
2.1.employeeTaxTypeBOs.taxTypeValBOs.quarter EQUAL QUARTER
2.2.employeeTaxTypeBOs.taxTypeValBOs.year EQUAL YEAR

Please post the SQL that is generated from TopLink, and the xml where you define the NamedQuery. What version of the MappingWorkbench and TopLink runtime are you using?
Deepak

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Named Query (JOIN query) runs in Toplink JPA but not in EclipseLink

I have a namedquery in JPA entities like (Entities do not include JOIN colums specifically.. no many-to-many or one-to-many relation in entities)
select a from table1 a, table2 b where a.id=b.id
This named query runs on Toplink Essentials without any problem.
When I run this query using EclipseLink
EclipseLink generates the query below and gives an error.
select table1.id, table1.name, table1.surname from table1 t0, table2 t1 where t0.id=t1.id
There are error _"*table1.surname*"_ is invalid identifier. Because; table1 is not define as an alias, must be "t0.surname".
How can I solce this problem.
The code runs on Toplink Essential but not in EclipseLink

I have a namedquery in JPA entities like (Entities do not include JOIN colums specifically.. no many-to-many or one-to-many relation in entities)
select a from table1 a, table2 b where a.id=b.id
This named query runs on Toplink Essentials without any problem.
When I run this query using EclipseLink
EclipseLink generates the query below and gives an error.
select table1.id, table1.name, table1.surname from table1 t0, table2 t1 where t0.id=t1.id
There are error _"*table1.surname*"_ is invalid identifier. Because; table1 is not define as an alias, must be "t0.surname".
How can I solce this problem.
The code runs on Toplink Essential but not in EclipseLink

Named Query Error

Hi,
I'm having trouble passing argument to a named query in the mapping workbench.
Here is my SQL:
SELECT COUNT(*) FROM VALID_PARTY_CLASSIF, CLASSIF_TYPE WHERE CLASSIF_TYPE.CLASSIF_TYPE_ID = VALID_PARTY_CLASSIF.CLASSIF_TYPE_ID AND CLASSIF_TYPE.CLASSIF_TYPE_ID = #ID
and when I find and execute the query, getting following error
Execute query ReadObjectQuery(com.amgen.bria.business.bizobject.ClassificationTypeBO)
SELECT COUNT(*) FROM VALID_PARTY_CLASSIF, CLASSIF_TYPE WHERE CLASSIF_TYPE.CLASSIF_TYPE_ID = VALID_PARTY_CLASSIF.CLASSIF_TYPE_ID AND CLASSIF_TYPE.CLASSIF_TYPE_ID = ?
     bind => [56]
Exception [TOPLINK-6044] (OracleAS TopLink - 10g (9.0.4) (Build 031018)): oracle.toplink.exceptions.QueryException
Exception Description: The primary key read from the row [DatabaseRow(
     => 0)] during the execution of the query was detected to be null. Primary keys must not contain null.
Query: ReadObjectQuery(com.amgen.bria.business.bizobject.ClassificationTypeBO)Local Exception Stack:
Exception [TOPLINK-6044] (OracleAS TopLink - 10g (9.0.4) (Build 031018)): oracle.toplink.exceptions.QueryException
Exception Description: The primary key read from the row [DatabaseRow(
     => 0)] during the execution of the query was detected to be null. Primary keys must not contain null.
Query: ReadObjectQuery(com.amgen.bria.business.bizobject.ClassificationTypeBO)
     at oracle.toplink.exceptions.QueryException.nullPrimaryKeyInBuildingObject(QueryException.java:541)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:262)
     at oracle.toplink.queryframework.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:226)
     at oracle.toplink.queryframework.ReadObjectQuery.execute(ReadObjectQuery.java:344)
     at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:498)
     at oracle.toplink.queryframework.ReadQuery.execute(ReadQuery.java:111)
     at oracle.toplink.publicinterface.Session.internalExecuteQuery(Session.java:1968)
     at oracle.toplink.threetier.ServerSession.internalExecuteQuery(ServerSession.java:629)
     at oracle.toplink.threetier.ClientSession.internalExecuteQuery(ClientSession.java:392)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:1096)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:1065)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:966)
     at com.amgen.bria.persistence.module.toplink.TopLinkPersistenceService.internalExecuteQuery(TopLinkPersistenceService.java:137)
     at com.amgen.bria.persistence.PersistenceService.executeQuery(PersistenceService.java:97)
     at com.amgen.cma.persistence.service.ClassificationPersistenceService.findCustomerForClassifTypeCount(ClassificationPersistenceService.java:405)
     at com.amgen.cma.persistence.service.ClassificationPersistenceServiceTest.testFindCustomerForClassifTypeCount(ClassificationPersistenceServiceTest.java:193)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at junit.framework.TestCase.runTest(TestCase.java:154)
     at junit.framework.TestCase.runBare(TestCase.java:127)
     at junit.framework.TestResult$1.protect(TestResult.java:106)
     at junit.framework.TestResult.runProtected(TestResult.java:124)
     at junit.framework.TestResult.run(TestResult.java:109)
     at junit.framework.TestCase.run(TestCase.java:118)
     at junit.framework.TestSuite.runTest(TestSuite.java:208)
     at junit.framework.TestSuite.run(TestSuite.java:203)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:421)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:305)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:186)
client released
Please let me know if I am missing anything.
Thanks
Saket

Saket, the problem is right here:
ReadObjectQuery(com.amgen.bria.business.bizobject.Clas
ificationTypeBO)
When you read a an object mapping back, the primary key you have specified for that object mapping in Toplink has to be part of this search criteria (it is how it's stored in toplink's identity map/cache)
Since you are only executing a 'select count(*)', it is erroring out
HTH,
Sean

Order By in Named Query

Hello,
is it possible to set ORDER BY in a Named Query Expression build through the Expression Builder?
Or is it possible to trigger this while executing the Named Query in the UnitOfWork?
Thanks,
Thomas

Nemata,
The mapping editor in JDeveloper does not yet allow you to configure query ordering. To do this you will need to write a piece of code called an after-load or ammendment method that customizes descriptor configuration when being loaded from the XML representation. In this method you will look up the query you defined and customize any additional settings, such as ordering.
An example after-load method would be placed on any arbitrary helper class and would look like:
    public static void afterLoadEmployee(ClassDescriptor descriptor) {
        ReadAllQuery raq = (ReadAllQuery)descriptor.getDescriptorQueryManager().getQuery("findAllEmployee");
        raq.addAscendingOrdering("lastName");
    }To have this method invoked you will need to configure it on the descriptor in the JDeveloper mapping editor.
1. In the structure pane when the map is selected go to the descriptor for the class you wish to customize its query.
2. Using the right mouse menu on the descriptor select the advanced properties sub-menu and select 'after-load'. This will enable the additional after-load tab on the descriptor's editor.
3. In this after-load panel you will need to specify the helper class where the static after-load method is written as well as the signature for the method wanted.
Now, the next time the application is run this method will be invoked and you ordering customizations will be applied.
This may sound a little complex but is a very useful technique for configuration or customization of descriptor, mapping, or query parameters that are not visible in the mapping editor or are more easily accomplished through code.
Doug

Treat objects from named query as new ones

Hello,
I use TopLink 11.1.1.1.0 and I need to do following. I want to read object from database with named query and let TopLink treat them like new object created in java. Is it possible? Obejcts are in one table but the named query computes them with select from several different tables, so this obejcts are not present in the table.
Why I need it? It is import of data from one module of our application to another. Previously it was done in java. About 500 000 objects were read in one module just to convert into 20 000 objects in another module. If database does this conversion (named query with grouping which reads the 20 000 objects) it is much faster and take much less memory.
What I can do is to create new class with the same fields query this objects and then copy them to object I need. But I don't like creating new class just for this.
Thank for any help
Frank

Thanks for help I solved it different way eventually. I made a stored procedure which inserts data to the table of SOURCE_ITEMS. First I call stored procedure, then I load all new created SOURCE_ITEMS with ReadAllQuery (I have business parameters by which to select them) and make post processing in java with them. I used StoredProcedureCall in TopLink so if exception occurs and transaction rollbacks, stored procedure will rollback as well (I tried it, works for sure:).
StoredProcedureCall call = new StoredProcedureCall();
call.setProcedureName(SQL_IMPORT_CALL);
call.addNamedArgumentValue(SQL_IMPORT_PARAM_1, getId());
call.addNamedArgumentValue(SQL_IMPORT_PARAM_2, getXXX().getId());
call.addNamedArgumentValue(SQL_IMPORT_PARAM_3, getYYY.getId());
call.addNamedArgumentValue(SQL_IMPORT_PARAM_4, getZZZ());
DataModifyQuery query = new DataModifyQuery();
query.setCall(call);
query.setShouldBindAllParameters(true);
// insert of imported SOURCE_ITEMS
ctx.executeQuery(query);
Thanks Chris and hope this will help to somebody else as well..
Frank
Edited by: user604333 on Nov 17, 2010 12:20 PM
Edited by: user604333 on Nov 17, 2010 12:20 PM
Edited by: user604333 on Nov 17, 2010 12:20 PM

Adding "order by" functionality to the expression of a toplink named query

hello,
using JDev 10.1.3, I have made a Toplink named query findCustomersByCompany with a parameter company (String) to pass the name of the company of interest. I used the expression option from the format tab with"1.companyId LIKE IGNORE CASE company".
The selection works fine but now I want the results to be ordered by customer name, the native order in the database is based on creation date.
How can I add the order by clause to my named query using the expression format?
kind regards,
Nemata

Look at http://www.thespot4oracle.com/SQL/re-6593_Adding-an-ordering-clause-using-a-TopLink-amendment-method.aspx
Hope this helps.

Toplink Named Query - Creating the Expression

In JDeveloper, I have this scenario.
I’ve created a:
Name.java – private String name;
Managed Bean – Name - id, Class - paperless.Name, Scope - session
Toplink Named Query --> findUserProfile
Type --> ReadObjectQuery
In the format tab, I’m using “Expression” and it is “1. pp_Username EQUAL “#{id.name}”
I’m trying to do a query on pp_Username where pp_Username equals the login name that I have stored in the session (id.name). I can only assume that I have my express written incorrectly. When I run it, I just get nothing. Any ideas?

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

Clone of TopLink named query

One of our projects here has a requirement where they'd like to modify, at runtime, the named query defined in the Mapping Workbench.
One example is to set the refresh depth level (cascadePrivateParts, cascadeAll, for example) for the named query so that the defined query could be used in different scenarios with slightly different query options to get different query results.
To support this, we will need to clone the query. See the sample code below:
ObjectLevelReadQuery toplinkQuery = null;
ObjectLevelReadQuery queryClone = null;
Descriptor descriptor = session.getDescriptor(targetClass);
DescriptorQueryManager queryManager = descriptor.getQueryManager();
toplinkQuery = (ObjectLevelReadQuery)queryManager.getQuery(queryName);
queryClone = (ObjectLevelReadQuery)toplinkQuery.clone();
We try to use the clone method in DatabaseQuery. It seems to be working fine from the unit testing.
Could someone provide me some information regarding the overhead (performance penalty) the clone method introduces?
Thanks.
Haiwei

James,
Thanks very much for your quick response.
"The difference between using the clone vs not using the clone, is that clone (and changing the query) will trigger the query to no longer be prepared. This means that the query will need to re-generate the SQL for every execution."
Is this always true or it depends on what query options got changed?
I tried the cloneQuery with cloneQuery.cascadePrivateParts(). It seems that (from the trace) it still uses the prepared SQL. Here is the trace:
in testQuery .....
[3/8/05 15:27:47:027 EST] d510d51 SystemOut O 2005.03.08 03:27:47.027--ServerSession(1090797828)--Thread[Servlet.Engine.Transports : 1,5,main]--Connection(290525521)--SELECT * FROM QUOTE WHERE ID IN (?,?)
bind => [1, 2]
[3/8/05 15:27:47:037 EST] d510d51 SystemOut O 2005.03.08 03:27:47.037--ServerSession(1090797828)--Thread[Servlet.Engine.Transports : 1,5,main]--Connection(759639367)--SELECT NAME, ID, VERSION FROM USER04.SUBQUOTE WHERE (QUOTE_ID = ?)
bind => [1]
[3/8/05 15:27:47:037 EST] d510d51 SystemOut O 2005.03.08 03:27:47.037--ClientSession(219090191)--Thread[Servlet.Engine.Transports : 1,5,main]--client released
A separate question, the cascade option is not configurable in the Mapping Workbench, is this something that TopLink deliberately does not provide?
Thanks again for your assistance.

TopLink doesn't sort data received using Named query

Hello!
I'm trying to build a Tree table using a TopLink Named query in my application.
There are Id, Parent|_Id, Code and Name columns in the corresponding database table, where Id and Parent|_Id are linked together by Foreign key (typical tree). I used TopLink to describe this table in the Model part of my application. There I wrote a Named query, without using a query constructor (not Expression radio button, but SQL radio button). Here the text of query:
select * from regions a connect by prior a.Id = a.Parent_Id start
with a.Id is null order by a.Code
Then I created a Data control and tried to build a JSF page with data based on this query, as tree-table.
But I discovered the fact, that data under the same node on the same leaf level of the Tree are not sorted by code on the JSF page. For example, data may be situated as follows (Code - Name):
2. wwwwwwwwwwww
2.3.kkkkkkkkkkkk
2.1.fffffffffffffffffffff
2.2.oooooooooo
1. qqqqqqqqqqqqqqqq
1. 2. lllllllllllllllllllllllllllll
1. 1. hhhhhhhhhhhhhh
etc.
I verified this query on other environment (PL/SQL Developer, SQL+), but didn't found such unsorted results anywhere.
Please, give me an advice to avoid this problem.
Thanks.

Hi
Something to do with TreeMap(TreeSet). I tried with TreeSet but it didn't work. Here is the code :
In servlet :
Connection lConnection = getConnection(pRequest);
String lSQL = "";
Statement lStatement;
ResultSet lResultSet;
Hashtable lLtypeHashtable = new Hashtable();
lStatement = lConnection.createStatement();
lSQL = "SELECT RCID,RCMEANING FROM REFERENCECODES WHERE RCDOMAIN = 'LOCATIONTYPE' AND RCROWSTATE > 0 order by RCMEANING";
lResultSet = lStatement.executeQuery(lSQL);
while(lResultSet.next())
String lRcid = lResultSet.getString(1);
String lRcmeaning = lResultSet.getString(2);
lLtypeHashtable.put(lRcid.trim(),lRcmeaning.trim());
if(lResultSet != null) lResultSet.close();
if(lStatement != null) lStatement.close();
pRequest.setAttribute("LtypeHashtable",lLtypeHashtable);
//Below Query is executed when one data from select element is selected
String lLType = DisplayUtilities.getString(pRequest.getParameter("LType"),true);
//LType is name of select element in JSP.
if (lLType != null)
lSQL = lSQL + " AND " + lUpperCaseFunction + "(LOCATIONTYPE)" +
" = " + DBUtilities.formatString(lLType.toUpperCase());
pRequest.setAttribute("rLType",lLType+"");
In JSp :
<%
Hashtable lLtypeHashtable = (Hashtable)request.getAttribute("LtypeHashtable");
%>
<TR>
<TD width="15%"> <div align="left">
<select name="LType" size="1" >
<option Value="">< Select ></option>
<%
if(lLtypeHashtable != null)
Enumeration enum = lLtypeHashtable.keys();
while(enum.hasMoreElements())
String key = (String)enum.nextElement();
String value = (String)lLtypeHashtable.get(key);
String flagBack = "";
if(key.equals((String)request.getAttribute("rLType")))
flagBack = "selected";
%>
<option Value="<%=key%>" <%=flagBack%>><%=value%></option>
<%
%>
</select></div>
</TD>
</TR>
How should I implement TreeSet?
Looking forward for an early reply.
Thanks.

Named query problem, [TOPLINK-6008] error

I created a simple table in database (one column, two rows). I created java class and Data Control and dragged the Data Control onto JSP page. Data were shown ok. Then I tried to create named query (simple SELECT MyCol FROM FROM MyTable). This time the new Data Control on JSP didn't work (no data shown). So I tried this scriptlet on jsp:
<%
String sDC = "MyDataControl";
DCDataControl dc = HttpBindingContext.getContext(request).findDataControl(sDC);
ClientSession cs = ((ToplinkDataControl)dc).getClientSession();
Vector all = (Vector)cs.executeQuery("MyNamedQuery",mypackage.MyTable.class);
%>
Last row causes error
Exception [TOPLINK-6008] (OracleAS TopLink - 10g (9.0.4) (Build 031126)): oracle.toplink.exceptions.QueryException
Description: Missing descriptor for [mypackage.MyTable] for query named [MyNamedQuery].
     at oracle.toplink.exceptions.QueryException.descriptorIsMissingForNamedQuery(QueryException.java:282)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:878)
     at dataPage.jspService(dataPage.jsp:26)
Does anybody have an idea why the jsp page with Data Control based on named query is empty and why above scriptlet causes that error ? Thanks.

This solution only applies to earlier version of JDeveloper. In 10.1.3 the TopLink metadata (XML deployment descriptor) is automatically generated during the build/make process as required. In earlier version this is a required step after any change is made to the mappings .
Doug

TopLink named query issue

We are using Jdeveloper 10.1.3.3, TopLink, ADF JSF Faces. I have an issue with TopLink named query. I am passing a value to parameter defined in the TopLink named query. The problem is that the parameter value is not being set when JSP page is loading for the first time and TopLink named query is not returning any results. When I click a button or refresh the page or some user action, then only the parameter value is set in the TopLink named query and returning the query results.Is this TopLink issue or is there any way to invoke action to fire the TopLink named query with the parameter value being passed at the time of loading JSP page ?
Our project is held up due to this issue and I will highly appreciate if someone can help on this?
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

IllegalArgumentException when using Constructor expression in Named Query.

I have the following JPQL-query:
SELECT NEW se.callista.test.dto.EmployeeReportData(e.firstName, e.lastName, a.city, e.employmentPeriod.startDate) FROM Employee e JOIN e.address a ORDER BY e.lastName, e.firstNamewhere EmployeeReportData is a dto (not an entity). The query works fine when running it as a normal query. When I put it as a named query however, I get the following error message when trying to execute it: java.lang.IllegalArgumentException: Object: se.callista.test.dto.EmployeeReportData@10f9644 is not a known entity type.
I can't find anything in the JPA-spec that says a named query cannot contain a constructor expression - am I missing something?
Found the error. It works fine now :)
Message was edited by:
Sofia_Jonsson

I had the same problem.
It seems that the Entity class is not loaded by the JVM at the moment of calling createNamedQuerey(string).
I've solved this problem by loading the entity class manually in the caller by calling "Class.forName(string)" and passing the entity's class name as a parameter.

Native TopLink named query with named parameters

Hello,
Defining my metadata in native TopLink xml and using the native TopLink's Session interface I can access and successfully execute a named query using positional parameters (parameters passed to match the ?1 ?2 etc). I used for this the Session.executeQuery(String, Class, List) method e.g.
select p from Person p where p.name = ?1
Now, how can I get the same Session to execute named queries using named parameters? None of the Session.executeQuery methods seem suitable ... Am I missing anything here? e.g.
select p from Person p where p.age = :age
I can't find in Session http://www.oracle.com/technology/products/ias/toplink/doc/1013/main/b13698/oracle/toplink/sessions/Session.html a good match for this use-case. I would expect something like:
Session.executeQuery(String queryName, Class target, List argNames, List argValues)
or
Session.executeQuery(String queryName, Class target, Map argsKeyedByName)
but can't find any good match, can anyone please enlighten me?
Thanks in advance,
Best regards,
Giovanni

Hello Chris,
Many thanks for your response. I am sorry if I did not explain my problem properly.
Suppose I already defined a named query in the metadata XXXProject.xml using the <opm:querying ... this JPQL named query "customFinder" already exists and would look something like:
select p from Person p where p.firstname=:firstname and p.lastname=:lastname and p.birthdate=:birthdate
now say you want to execute this query from the Session:
Vector args = new Vector();
// how do you know the order? you shouldn't know the order!
// you know only the parameter names and that's what I mean
// about named parameters
// This args setup is wrong ... I need a way to specify to which
// parameter name each argument corresponds to. In other words
// if the named query where criteria order of parameters is modified
// perhaps because of pruning composite keys etc you won't break the
// existing code ...
args.add(new Date());
args.add("Azua");
args.add("Giovanni");
Session session = ...
session.executeQuery("customFinder", Person.class, args);
JPA supports both type of queries positional parameters and named parameters. Your explanation above is only for the first, my question refers to the later.
I have not yet found the api for this ... though I am investigating along the lines of:
Query query = session.getQuery("customFinder");
and then try to assign the arguments in the same order that the parameters are defined in query or?
Thanks in advance,
Best regards,
Giovanni
Edited by: bravegag on 29.05.2009 08:06

Toplink named query and firstrow

In one of our projects we have a need to chunk records returned by a Toplink query.
For example if a query retrieves 1000 rows we need to chunk records in batches of a variable number.
Lets assume for this one request we need to chunk these 1000 rows in batches of 50 records. Is there a way to do this with Toplink?
I tried to create a named query and then am setting the first row to 0 and max rows to 20
And in a loop I am adding 20 to the value of the first row.
This does not work. The first time the query runs the first row = 0 and the max rows = 20 and I get 20 records back as I expected, but the next time the query runs after I change the value of firstrows to 21 and I do not get any records back even though the DB has a 1000 records.
Is it possible to do this sort of batching of the result set? I appreciate any pointers on how to solve this
Thanks a lot for the help

Hello,
MaxRows is independent of firstResult in TopLink; unless using a database that supports pagination, MaxRows is applied to the statement, and then firstresults used on the returned resultset to skip to the desired first row. So, the driver would return 20 rows, and then firstResult skips to row 20 - so nothing gets returned.
MaxRows and FirstResult are used in TopLink as the range you want to be returned. So both need to be incremented so that the difference between them is the max number of rows you want returned - MaxRows could be better described as a LastResult instead.
Best Regards,
Chris

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

Named Query Expression in Toplink workbench

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