Object Query Language (OQL) Support ?

I know Toplink has an "ExpressionBuilder" type querying
But does Toplink support Object Query Language (OQL)
Example :
Something like this ?
// perform query
OQLQuery query = new OQLQuery(
"select x from Person x where x.name = \"Doug Barry\"");
Collection result = (Collection) query.execute();
Iterator iter = result.iterator();
Thanks
Ratheesh

Ratheesh,
TopLink does not support OQL. We offer query support through the following 5 options:
1. EJB QL - for both Entity Beans (CMP/BMP) and Java objects
2. TopLink Expressions - Object based query API
3. SQL calls
4. Stored procedure calls
5. Quey by example
Doug

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What query languages are supported by SSAS?

Hi there,
I am currently writing a paper on Microsoft SSAS and I was wondering if I could ask the Microsoft moderators and the community for some information concerning the languages supported by SSAS.
I understand that SSAS supports both MDX for multidimensional and DAX for tabular models. Hoever, can I use any other language to query data?
For instance? Is it fair to sayt that I could I use T-SQL to query data? If so, do I need to have a specific storage mode configured (i.e.: ROLAP) or could I use T-SQL for queries regardless if I am using ROLAP, HOLAP or even MOLAP?
Also, is it correct to include LINQ in this category, as well as XML for analysis?
If you could provide some literature in your answer that would be great (but no sweat if you can't).
Best Regards,
P.

Yes, the dialect of SQL supported is very, very limited.
Don't forget that SSAS also supports DMX for data mining. You can also use this to query your cube, but again it's not pretty - see
http://cwebbbi.wordpress.com/2009/05/20/joining-the-results-of-two-mdx-queries-together/ for example.
Regarding LINQ, there's at least one third-party product that allows you to use it on top of cubes:
http://www.agiledesignllc.com/Products.htm
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http://cwebbbi.wordpress.com/2013/06/02/analysis-services-multidimensional-now-works-with-power-viewand-why-thats-important/
Chris
Check out my MS BI blog I also do
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and run public SQL Server and BI training courses in the UK

EJB Query Language

Hi All,
I am using SAP Netweaver Developer Studio(2004)version.I want to know that EJB2.0 Query Language will
support Joins,Internal select statement with in a select
statement or not.Is it posssible or not.I have a requirement lilke this,I have to use joins.
Thanks & Regards,
Guru

Guruvulu,
In EJB QL you may operate on objects relations (both 0..1 and 0..n) in the same way as with joins in SQL. So the answer is yes.
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Valery Silaev
EPAM Systems
http://www.NetWeaverTeam.com

Query language for XML documents

Which is a better (efficiency in terms of memory management) query language for interacting with XML documents.The query language shouls support 'insert', 'delete', 'update' and 'select' commands. How fast is database as compared to XML ( database being replaced by XML) when only 'insert' n 'select' commands are issued?

Hi,
I suggest you use the Sunopsis JDBC for XML driver that will let you perform all kind of SQL statements on your XML files. It is a type 4 driver so it's very use to use. You may have more information and download it here:
http://www.sunopsis.com/corporate/us/products/jdbcforxml/
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Simo Fernandez

Help ::Object Query Langauge

I have to give the object query language to solve some problems can any one help me with this?

Hi
<b>HELP_OBJECT_SHOW_FOR_FIELD</b>This function module displays the data element documentation for components of any structure or database table from the ABAP Dictionary. You pass the name of the component and structure or table to the import parameters FIELD and TABLE.
Refer:
http://help.sap.com/saphelp_nw04/helpdata/en/9f/dbad0435c111d1829f0000e829fbfe/content.htm
Regards
Ravish Garg
<b>
*reward if useful</b>

Limit query for Java Persistence Query Language

Hi,
Anybody know Java Persistence Query Language can support limit querry to limit the number of row return(Like SQL LIMIT clause)?
Thanks

I think the javax.persistence.Query methods setFirstResult and setMaxResults are what you need...

Is EJB query language supports UNION

Hi All,
Can anyone suggest me is EJB query language supports UNION type of select queries
if possible can any one suggest me how to convert below Sql query to Ejb ql
Ex:
select * from table1 where id='10'
union all
select * from table1 where id='20'

The UNION clause specifies a combination of the output of two subqueries. The two queries must return the same number of elements and compatible types
1.You cannot use dependent value objects with UNION.
2.UNION ALL combines all results together in a single collection.
3.UNION combines results but eliminates duplicates.
4.If ORDER BY is used together with UNION, the ORDER BY
must refer to selection expression using integer numbers.
Example:
This example returns a collection of all employee objects of type EmpBean and all manager objects of type ManagerBean where ManagerBean is a subtype of EmpBean.
select e from EmpBean e union all select m from DeptBean d, in(d.mgr) mThis example shows a query that is not valid, because EmpBean and DeptBean are not compatible.
select e from EmpBean e union all select d from DeptBean d
Your Example:
Select e from Table1Bean e where e.id=10
union all
Select e from Table1Bean e where e.id=10

Applying a query language to collections

Hi, we handed in a project a while ago that was essentially to read in data from a .DAT file, store it in appropriate collections, then use a basic query language to filter through the stored data. I wasn't really happy with my querying though, as it was basically a huge succession of control statements. The queries were of the form "select OBJECTNAME where ATRIBUTE OPERATOR VALUE and ATRIBUTE OPERATOR VALUE", there could be as many sub clauses as desired (0... 200 whatever). For example "select elephant where height > 360 and weight <= 1000".
We had a comment back that we should use a Query interface and a two subclasses to represent a simple query (e.g. height > 360) and then a conjunctive query (ie simplequery1 AND simplequery2 ). The Query interface would then have a match method. I'm struggling to get my head around how I do this, does anyone have a simple example or explaination that might help me out?
Cheers.

I've done something like this a couple times. Your need to get a better idea of what you want your query language to look like. For example, if you're given a list of elephants, the "select elephant" part is unnecessary (your query will just return a list of matching elephants). You should decide if you want it to handle things like (height > (weight / 2)), whether conditions can be nested "((a and b) or (c and d)) and (e or f)". Will you need to support the conditional operator (a ? b : c) or a unary operator (-)? How complex will your order of operations rules be?
If you keep it simple (always two operands), you could go with something like this:
public interface QueryOperator
public boolean eval(Object leftParam, Object rightParam);
public enum BasicOperators implements QueryOperator
public class QueryElement
private QueryOperator operator;
private Object leftParam;
private Object rightParam;
}

EJB query language help!!

Hi all, I have been trying to run a ejb query on JBoss 4.0.5, using built in hypersonic db, For some strange reasons am able to fetch all objects from db without any where clause but if am using a where clause with an attribute name from the entitybean am unable to retrieve any results.
I get an org.hibernate.QueryException, could not resolve property : "property name"
My ejb query looks like this...
SELECT template FROM TemplateSelect template WHERE template.template_name='Template_One'
TemplateSelect is my entity bean class and I do have an attribute named template_name in my bean class.
could any one please suggest me what could be wrong and also direct me to a good tutorial on ejb query language as well as I am fairly new to hibernate and ejb3 !
tons of thanks in advance!
pravin

Hi Anuradha ,
I'm afraid the query language does not support retrieving the date portion (i.e. truncating the time) from a date field.
I propose you turn you named into a BETWEEN query taking two parameters one for the beginning of the day and another for the end of the day. Then your named query could look like:
SELECT max(o.req_id) FROM requests o WHERE o.requestdate BETWEEN :start AND :end
The following code creates two calendar instances for the current day, one for 00:00:00 and another for 23:59:59:
Calendar start = Calendar.getInstance();
start.set(Calendar.HOUR_OF_DAY, 0);
start.set(Calendar.MINUTE, 0);
start.set(Calendar.SECOND, 0);
start.set(Calendar.MILLISECOND, 0);
Calendar end = Calendar.getInstance();
end.set(Calendar.HOUR_OF_DAY, 23);
end.set(Calendar.MINUTE, 59);
end.set(Calendar.SECOND, 59);
end.set(Calendar.MILLISECOND, 999);
Here is some sample code that creates a query instance for a named query called findMaxRequestPerDay and passes the Date of the above Calendar instance as actual parameter values. It assumes the named query is called findMaxRequestPerDay and the req_id field is a long:
Query query = em.createNamedQuery("findMaxRequestPerDay");
query.setParameter("start", start.getTime());
query.setParameter("end", end.getTime());
Long max = (Long)query.getSingleResult();
I hope this helps.
Regards Michael

EJB Query Language where condtion based on date

Hi,
I am using EJB3 query language. In the table I have a column called requestdate which is in date time format. I have created an entity class.
I need to select few records using query language(named queries) based on this requestdate matching to the current date. I want to compare only based on Date value (truncating the time). Something like this
select max(o.req_id) from requests o where o.requestdate = :currentdate
currentdate is java.sql.Date value formatted to yyyymmdd only.
How can I do this using query language?
Please help to me get this done.
thanka
Anuradha

Hi Anuradha ,
I'm afraid the query language does not support retrieving the date portion (i.e. truncating the time) from a date field.
I propose you turn you named into a BETWEEN query taking two parameters one for the beginning of the day and another for the end of the day. Then your named query could look like:
SELECT max(o.req_id) FROM requests o WHERE o.requestdate BETWEEN :start AND :end
The following code creates two calendar instances for the current day, one for 00:00:00 and another for 23:59:59:
Calendar start = Calendar.getInstance();
start.set(Calendar.HOUR_OF_DAY, 0);
start.set(Calendar.MINUTE, 0);
start.set(Calendar.SECOND, 0);
start.set(Calendar.MILLISECOND, 0);
Calendar end = Calendar.getInstance();
end.set(Calendar.HOUR_OF_DAY, 23);
end.set(Calendar.MINUTE, 59);
end.set(Calendar.SECOND, 59);
end.set(Calendar.MILLISECOND, 999);
Here is some sample code that creates a query instance for a named query called findMaxRequestPerDay and passes the Date of the above Calendar instance as actual parameter values. It assumes the named query is called findMaxRequestPerDay and the req_id field is a long:
Query query = em.createNamedQuery("findMaxRequestPerDay");
query.setParameter("start", start.getTime());
query.setParameter("end", end.getTime());
Long max = (Long)query.getSingleResult();
I hope this helps.
Regards Michael

Why java is called as true object oriented language?

HI Friends,
Though few oops concepts is not supported , why java is called as truly object oriented language and C++ as not a purely object oriented language???? Please, if any one know , give me the answer.
Thanks to all.

few oops concepts is not supportedwhich concepts?
as far as i know...to be OO, you must supports
encapsulation, abstraction, inheritancxe, composition (aggretration, et all) and polymorphism. Java supports all those comcept..now..Java is a hybrid due to what Jverd has pointed out.
the only pure OO language that i know of is SmallTalk. they have Meta class that can create Class object. and all their primitaives are object.
C# comes close, but their Class are not object.

Coherence query language - QueryBuilder API

Hi ,
does anyone know , in which package the ' QueryBuilder' class resides ?

charlie ,
am not sure that , whether there is a QueryBuilder API or not . I am looking for a API , which can convert the
sql query " select homeAddress.state, age, count() from "ContactInfoCache" group by homeAddress.state, age " into coherence specific query language .
In short , I just want to extract a particular attribute from the value object , not the whole value object.
Edited by: Mariselvam on Feb 17, 2011 8:26 PM

How To change the ADF View Object query where-clause at RunTime?

I am trying to create a simple display page which will display user data (username, assoc_dist_id, assoc_agent_id, status , etc). The User data is stored in a database table and i am using an ADF Read Only table based on the View Object to display the data on the JSF page.
However, i want to display only the users that a particular person accessing the page has the AUTH LEVEL to see. e.g. If the person accessing the page is an 'ApplicationAdministrator' then the page should display all users in the table, If its a 'DistributorAdministrator' then the page should display only users associated with that Distributor (i.e. assoc_dist_id = :p_Dist_id ) and If its an 'AgentAdministrator' , then the page should display only users associated with that Agent ( i.e. assoc_agent_id = :p_Agent_id).
Currently my af:table component displays all the users in the table because the query for the view object is (select * from users) . However, i want to use the same viewobject and just set the where-clause at runtime with the appropriate parameter to restrict the dataset returned.
Do anyone knows how to accomplish this ?

David,
See the custom method initializeDynamicVariableDefaults() in the SRViewObjectImpl.java class in the FrameworkExtentions project in the SRDemoSampleADFBC sample application. You can find out how to install the demo if you haven't already from the ADF Learning Center at:
http://www.oracle.com/technology/products/adf/learnadf.html
This class is a framework extension class for view objects that adds a neat, generic feature to be able to dynamic default the value of named bind variables. You can read more about what framework extension classes are and how to use them in Chapter 25, "Advanced Business Components Techniques" of the ADF Developer's Guide for Forms/4GL Developers, also available at the learning center above.
It is an example of generic framework functionality that "kicks in" based on the presence of custom metadata properties on a named bind variable. See section 25.3.3 "Implementing Generic Functionality Driven by Custom Properties" in the dev guide for more details. Using this sample code, if you add a bind variable to a view object, and define a custom metadata property named "DynamicDefaultValue" on that bind variable, and set this custom metadata property to the value "CurrentUser", then that bind variable will have its value dynamically defaulted to the name of the authenticated user logged in. If instead you set this custom property to the value "UserRole", then the bind variable will be set to the comma-separated string containing the list of roles that the authenticated user is part of.
Once you've created a framework extension class for view objects like this, you can have the view objects you create inherit this generic functionality.See section 25.1.4 "How to Base an ADF Component on a Framework Extension Class" in the dev guide for more info on this.
By adapting a technique like this (or some idea similar that better suits your needs) you can have your view object query contain bind variables whose values automatically take on the defaults based on something in the user-session environment.

View object query bind variable

I have a bind variable in my view object query and "Required" is unchecked for it. Due to this JUnits are failing with the Missing IN or OUT parameter error. If I set the bind variable as required, the JUnits run fine.
But this bind variable is also used in several view criterias where it is set as Optional. So if I set the bind variable in the view object query as Required, will it affect the view criterias as well?

check https://blogs.oracle.com/jdevotnharvest/entry/the_infamous_missing_in_or

BUG: Expression Language not supported (JDeveloper 10.1.3.0.4(SU1))

Hi!
I have the following code in a jspx page:
<c:if test="${!empty bean.genericErrorMessages}">
<h:outputText styleClass="texto_red"
value="#{bean.genericErrorMessages}"
id="applicationErrorMessages" escape="false"/>
</c:if>
All code compile well, but when i run the jspx page the following exception occur.
The problem is that in JDeveloper Early Access 3 the problem doesn't occur.
But in the Jdeveloper version 10.1.3.0.4(SU1) the exception occur.
I'm running JDeveloper in a Windows XP SP2, JSF 1.1_01 and JSTL 1.0
Does anyone know a solution to this problem? Tanks.
The Exception:
Error: Expression Language not supported in compile time attribute test
     at oracle.jsp.parse.JspUtils.hasELWithCreation(JspUtils.java:1248)
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     at oracle.jsp.parse.JspParseTag.parse(JspParseTag.java:1413)
     at oracle.jsp.parse.OpenJspTagHandler.parse(OpenJspTagHandler.java:802)
     at oracle.jsp.parse.JspParseTag.genXMLSrcTag(JspParseTag.java:867)
     at oracle.jsp.parse.JspParseTag.parseXMLSrcNextTag(JspParseTag.java:745)
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     at oracle.jsp.parse.JspParseTag.parseXMLSrcBody(JspParseTag.java:1121)
     at oracle.jsp.parse.OpenJspTagHandler.parseXMLSrcBody(OpenJspTagHandler.java:739)
     at oracle.jsp.parse.JspParseTag.parseXMLSrc(JspParseTag.java:1375)
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     at oracle.jsp.parse.OpenJspTagHandler.parse(OpenJspTagHandler.java:802)
     at oracle.jsp.parse.JspParseTag.genXMLSrcTag(JspParseTag.java:867)
     at oracle.jsp.parse.JspParseTag.parseXMLSrcNextTag(JspParseTag.java:745)
     at oracle.jsp.parse.JspParseTag.parseXMLSrcBody(JspParseTag.java:1121)
     at oracle.jsp.parse.OpenJspTagHandler.parseXMLSrcBody(OpenJspTagHandler.java:739)
     at oracle.jsp.parse.JspParseTag.parseXMLSrc(JspParseTag.java:1375)
     at oracle.jsp.parse.JspParseTag.parse(JspParseTag.java:1413)
     at oracle.jsp.parse.OpenJspTagHandler.parse(OpenJspTagHandler.java:802)
     at oracle.jsp.parse.JspParseTag.genXMLSrcTag(JspParseTag.java:867)
     at oracle.jsp.parse.JspParseTag.parseXMLSrcNextTag(JspParseTag.java:745)
     at oracle.jsp.parse.JspParseTag.parseXMLSrcBody(JspParseTag.java:1121)
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     at oracle.jsp.parse.JspParseTag.parseXMLSrcNextTag(JspParseTag.java:745)
     at oracle.jsp.parse.JspParseTag.parseXMLSrcBody(JspParseTag.java:1121)
     at oracle.jsp.parse.JspParseTag.parseXMLSrc(JspParseTag.java:1375)
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     at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:870)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:451)
     at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:218)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:119)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)
     at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
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Hello,
You should not try to mix JSP and JSF EL prior to JSF 1.2 and JSP 2.1, the result is inconsistent most of the time.
To fix your current issue though, I suggest you use the rendered attribute instead of a <c:if>, so would be:
<h:outputText styleClass="texto_red"
value="#{bean.genericErrorMessages}"
id="applicationErrorMessages" escape="false" rendered="#{!empty bean.genericErrorMessages}"/>Regards,
Simon Lessard

Object Query Language (OQL) Support ?

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