Named Query in Interface

HI,
Iâve a named query in a class descriptor set in workbench and if I call the method
Object executeQuery(java.lang.String queryName, java.lang.Class domainClass, java.util.Vector argumentValues)
Works fine. My domain class implements an interface and I donât want to expose the domain class to my caller. For this to work is there a way to associate the named query to the interface so that the interface can be passed in the above method instead of concrete class?
If not how can I set the query in Toplink so that I can use the following method
executeQuery(java.lang.String queryName, java.lang.Object arg1)
In the current setup when I try to use the above method Iâm getting following exception
Exception [TOPLINK-6026] (OracleAS TopLink - 10g (9.0.4.3) (Build 040412)): oracle.toplink.exceptions.QueryException
Exception Description: Query named [retrieveBases] is not defined. Domain class: []
     at oracle.toplink.exceptions.QueryException.queryNotDefined(QueryException.java:587)
     at oracle.toplink.exceptions.QueryException.queryNotDefined(QueryException.java:580)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:1020)
Thanks
-Mani

If you associate the interface with the class' descriptor you should be able to execute queries against the interface and have it execute against the correct class.
In the MW, in your descriptor use the advanced property "Interface Alias" and set the class' interface.
Through the code API, you would use the interface policy,
descriptor.getInterfacePolicy().addParentInterface(MyInterface.class);

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Named query in Entity Bean - Problem with embedded class

Hello Forum,
I'm trying to set up a named query in my Entity Bean and I'm unable to get
it up and running for an embedded class object.
The class hierarchy is as follows:
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                 ^
                 |
        @MappedSuperclass
        AbstractSapUserData (contains the timeSlice field)
                 ^
                 |
          @Entity
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@NamedQuery(name = SapUserDataContext.NAMED_QUERY_NAME_COUNT_QUERY,
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                                     + SapResultDataContext.COLUMN_NAME_SAP_CUSTOMER_ID
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                                     + "timeSliceEndTime")The query deploys and runs except that part:
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                                     + DayContext.COLUMN_NAME_DAY_OF_AGGREGATIONI don't see any difference to the part of the query accessing the timeSlice
field which is also an embedded class object - I access it in exactly the same way:
                                     + "obj.timeSlice.startTime"
                                     + "= :"
                                     + "timeSliceStartTime"
                                     + " AND "
                                     + "obj.timeSlice.endTime"
                                     + "= :"
                                     + "timeSliceEndTime"The problem is that the complete query runs on JBoss application server
but on the SAP NetWeaver application server it only rund without the
                                     + "obj.dayOfAggregation.calendar"
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                                     + DayContext.COLUMN_NAME_DAY_OF_AGGREGATIONpart - If I enable that part on SAP NetWeaver the server complains:
[EXCEPTION]
{0}#1#java.lang.IllegalArgumentException: line 1: Comparison '=' not defined for dependent objects
SELECT COUNT(obj) FROM SapUserData AS obj WHERE obj.sapCustomerId= :sap_customer_id AND obj.sapSystemId= :sap_system_id AND obj.sapServerId= :sap_server_id AND obj.dayOfAggregation.calendar= :day_of_aggregation AND obj.timeSlice.startTime= :timeSliceStartTime AND obj.timeSlice.endTime= :timeSliceEndTime
                                                                                                                                                                                             ^I know that this isn't an application server specific forum but the SAP NetWeaver server is the most strict EJB 3.0 and JPA 1.0 implementation I've seen so far so I think I'm doing something wrong there.
Someone in the SAp forum mentioned:
The problem here is that you compare an input-parameter with an embeddable field of your entity.
Regarding to the JPQL-grammer (spec 4.14) you are not allowed to compare
with the non-terminal embeddable field but with the terminal fields of your
embeddable. Stating that your embedded class might have the fields
startTime and endTime your JPQL query might look like this:
Query q = em.createQuery("SELECT count(obj.databaseId) FROM SapUserData obj WHERE obj.timeSlice.startTime = :startTime AND obj.timeSlice.endTime = :endTime");
q.setParameter("startTime", foo.getStartTime());
q.setParameter("endTime", foo.getEndTime());
q.getResultList();
This limitation in the JPQL grammar is rather uncomfortable.
An automatic mapping of the parameter's fields to the terminal fields of your
embedded field would be more convenient. The same can be said for lists
as parameter-values which is possible in HQL, too. I think we have to wait
patiently for JPA 2.0 and hope for improvements there. :-)
With that help I was able to get it up and running for the timeSlice field but
I don't see the difference to the dayOfAggregation field which is also just
another embedded class using an object of a class annotated with
@Embeddable.
The get method of the dayOfAggregation field is as follows:
     * Get method for the member "<code>dayOfAggregation</code>".
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    }The link to my question in the SAP forum for reference:
https://www.sdn.sap.com/irj/sdn/thread?messageID=3651350
Any help or ideas would be greatly appreciated.
Thanks in advance.
Henning Malzahn

Hello Forum,
got a response in the SAP forum - Issue is a bug in the SAP NetWeaver
app. server.
Henning Malzahn

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

Create Named Query with no descriptor?

I have a very simple query(see below). I'd like to use it as a named query instead of recreating it everytime. I wonder if there is a way I can add it to somewhere without using a descriptor so that I can retrevie it from the session.
Thanks,
Wei
ValueReadQuery query = new ValueReadQuery();
query.setSQLString("SELECT SYSDATE FROM DUAL");
Object obj = (Object) session.executeQuery(query);

There is an "addQuery(DatabaseQuery q)" on the Session interface that should do the trick. So create your session, and then do:
ValueReadQuery query = new ValueReadQuery();
query.setSQLString("SELECT SYSDATE FROM DUAL");
session.addQuery("getDate", query);
Then later you should be able to:
session.executeQuery("getDate");
- Don

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!

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;
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              }By the way there is a jdbc forum.

Snowflake dimension: named query vs. database view

A test question features a Product table with a Product Size code; Product Size description is taken from ProductSize table. As far as I can tell, the question asks me to choose between (a) setting up a database view joining Product and ProductSize, and
(b) doing the join in a data-source-view named query. I don't see a clear winner. (My thinking is as follows. Yes, he view would speed up the processing, even if not materialized. On the other hand, with a small dataset, the performance gain would be
minor in absolute terms. Do I want to have an extra database object in the picture?) Yet the question's author does. Can anyone advise please?

Hi Demyan,
According to your description, you want to know which is better, using named query in datasource view or using database view, right?
Based on my research, there is no performance differences between using named query in datasource view and using database view because they both result in SQL query being sent to the source system. Here is a blog which discuss this issue.
Consistency: If you already have logic in database views, I would continue to use them. As long as you know that you go to one spot to view/change the logic. Putting the logic in 2 different spots could lead to confusion.
Security Permissions: often you may not have permission to alter the source databases, in this case you have no choice but to setup named queries in the dsv.
Reference
http://geekswithblogs.net/darrengosbell/archive/2006/09/05/90278.aspx
http://bennyaustin.wordpress.com/2013/07/16/dbview/
Regards,
Charlie Liao
TechNet Community Support

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

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$ArrayList, Reason: groovy.lang.MissingPropertyException: No such property: id for class: java.lang.Double
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## Detail 0 ##
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     at oracle.jbo.server.ViewRowImpl.getAttributeInternal(ViewRowImpl.java:746)
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     at oracle.adf.model.bean.DCDataRow.getKey(DCDataRow.java:149)
     at oracle.adf.model.binding.DCIteratorBinding.buildFormToken(DCIteratorBinding.java:3836)
     at oracle.adf.model.binding.DCBindingContainerState.buildStringBuffer(DCBindingContainerState.java:71)
     at oracle.adf.model.binding.DCBindingContainerState.toString(DCBindingContainerState.java:590)
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     at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:181)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42)
     at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:85)
     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$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.

Query on interface

I am getting "The parameter name [startDate] in the query's selection criteria does not match any parameter name defined in the query" error when querying on interface using TopLink 11g (11.1.3). The interface is implemented by many classes MyImplementationClass being one of them. The query works in TopLink 10g. Is this a bug in 11g? Thanks.
Here is my code:
+// subquery+
ExpressionBuilder subqueryBuilder = new ExpressionBuilder();
ReportQuery subQuery = new ReportQuery(MySubQueryClass.class, subqueryBuilder);
+// Main read query+
ReadAllQuery namedQuery1 = new ReadAllQuery(MyInterface.class);
ExpressionBuilder expBuilder1 = namedQuery1.getExpressionBuilder();
subQuery.addAttribute("primaryKey");
subQuery.setSelectionCriteria(
subqueryBuilder.get("operationDate").between(
subqueryBuilder.getParameter("startDate"),
subqueryBuilder.getParameter("endDate")).and(
subqueryBuilder.get("primaryKey").equal(expBuilder1.get("primaryKey))));
namedQuery1.setSelectionCriteria(expBuilder1.get("valueDate")
+.between(expBuilder1.getParameter("startDate"),+
expBuilder1.getParameter("endDate")).and(
expBuilder1.get("primaryKey").notExists(subQuery)));
namedQuery1.addArgument("startDate", java.sql.Date.class);+
namedQuery1.addArgument("endDate", java.sql.Date.class);+
// Stack trace
DEBUG 15:52:54 - ClientSession(27122014)--Exception [TOPLINK-6094] (Oracle TopLink - 11g Release 1 (11.1.1.3.0) (Build 100323)): oracle.toplink.exceptions.QueryException
Exception Description: The parameter name [startDate] in the query's selection criteria does not match any parameter name defined in the query.
Query: ReadAllQuery(*myPackage.MyImplementationClass*)Local Exception Stack:
Exception [TOPLINK-6094] (Oracle TopLink - 11g Release 1 (11.1.1.3.0) (Build 100323)): oracle.toplink.exceptions.QueryException
Exception Description: The parameter name [startDate] in the query's selection criteria does not match any parameter name defined in the query.
Query: ReadAllQuery(myPackage.MyImplementationClass)
at oracle.toplink.exceptions.QueryException.parameterNameMismatch(QueryException.java:996)
at oracle.toplink.internal.expressions.ParameterExpression.getValue(ParameterExpression.java:227)
at oracle.toplink.internal.databaseaccess.DatabaseCall.translate(DatabaseCall.java:914)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:192)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:179)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeSelectCall(DatasourceCallQueryMechanism.java:250)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.selectAllRows(DatasourceCallQueryMechanism.java:583)
at oracle.toplink.internal.queryframework.ExpressionQueryMechanism.selectAllRowsFromTable(ExpressionQueryMechanism.java:2483)
at oracle.toplink.internal.queryframework.ExpressionQueryMechanism.selectAllRows(ExpressionQueryMechanism.java:2441)
at oracle.toplink.queryframework.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:467)
at oracle.toplink.queryframework.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:874)
at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:674)
at oracle.toplink.queryframework.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:835)
at oracle.toplink.queryframework.ReadAllQuery.execute(ReadAllQuery.java:445)
at oracle.toplink.internal.sessions.AbstractSession.internalExecuteQuery(AbstractSession.java:2265)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1079)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1063)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1022)
at oracle.toplink.descriptors.InterfacePolicy.selectAllObjectsUsingMultipleTableSubclassRead(InterfacePolicy.java:171)
at oracle.toplink.queryframework.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:462)
at oracle.toplink.queryframework.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:874)
at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:674)
at oracle.toplink.queryframework.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:835)
at oracle.toplink.queryframework.ReadAllQuery.execute(ReadAllQuery.java:445)
at oracle.toplink.internal.sessions.AbstractSession.internalExecuteQuery(AbstractSession.java:2265)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1079)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1063)
at oracle.toplink.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1037)

Try using the outer query for the parameters,
change,
subqueryBuilder.getParameter("startDate"),
to,
expBuilder1.getParameter("startDate"),
If that does not work, try the query without the sub-query to determine if the sub-query is the cause.
It could be a bug with the sub-query, if you can recreate it on EclipseLink you could log a bug, or contact Oracle support.
James : http://www.eclipse.org/eclipselink/

Order by clause with Named Query

hi
i have to give order by clause in Named Query
how we have to specify is can any body help
thanks
Harish

Assuming an Entity called Handset:
select h from Handset h order by h.description

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);

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

Named Query problem

Hi,
I have a new Query proplem: Following named Query doesn't work.
<?xml version="1.0"?>
<jdoquery>
<query name="findByArticleId">
select from salt.domain.orderservice.entity.TestOrder where
testOrderPositions.contains(testOrderPosition) &&
testOrderPosition.idArticle==:t</query>-->
</jdoquery>

Sorry, please ignore my posting! I've found the mistake!

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

Named Query in Interface

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