Viewobject where clause
Hi, i need to get the where clause from vo in a manage bean method when i'm using a query component.
I have a button than execute one reports and I need to pass to reports a where clause generate in the page with the query component.
thanks in advance
Hi, i've got it. The code is the next:
DCBindingContainer bc = (DCBindingContainer)this.getBindings();
DCIteratorBinding dcIb = bc.findIteratorBinding("TwcdpalabclaveView1Iterator");
ViewObject vo = dcIb.getViewObject();
String v_query = vo.getQuery();
System.out.println(v_query);
System.out.println(v_query.indexOf("WHERE"));
System.out.println(v_query.substring(v_query.indexOf("WHERE")));
String v_where =v_query.substring(v_query.indexOf("WHERE"));
v_where = v_where.replaceAll("WHERE","AND");
System.out.println(v_where);
AttributeList attr = vo.getNamedWhereClauseParams();
String[] attrname= attr.getAttributeNames();
String v_value;
String v_name;
int i =0;
while (i<attrname.length){
v_name = attrname;
System.out.println(v_name);
v_value = "'"+vo.getNamedWhereClauseParam(v_name).toString()+"'";
System.out.println(v_value);
v_where = v_where.replaceAll(v_name,v_value);
i++;
System.out.println(v_where);
thanks dear friends for your time.
Best regards.
luis
Similar Messages
-
A bug? BC4J ViewObject where clause change doesn't affect view contents
Hi!
I've found the following interesting behaviour (maybe a bug?) of BC4J ViewObject caching:
1) make a viewobject with where clause and 1 parameter in it.
2) set parameter binding to some value
3) execute query
4) then change viewobject's where clause, but leave parameter binding intact
5) execute query again
6) view object contents haven't changed!
actually, changing where clause text should make view object requery data from the database instead of using cached rows...
If to add a call to viewobject.clearCache() before second viewobject.executeQuery(), then everything works fine and view object's contents are changed.
Does anybody have any ideas about this? Or is this a some kind of a feature, or it is already fixed in a newer version of JDev?
Thnx!
PS. JDeveloper version 9.0.3.4 (build 1247).delete message
-
Dynamically set ViewObject where clause dynamically from Java bean
I have a requirement to display all of the records from a table when the JSP is first brought up, so my View Object looks like this:
"select emp_name from emp"
Then the users wants to ability to pass paramters to that View Object to refine the list so from by Java class I tried to do this:
ViewObject vo = cpd.findViewObject("EmpViewObject");
vo.setWhereClause("empName = :1");
vo.setWhereClauseParam(1,varEmpName);
vo.executeQuery();
But I am getting JBO errors and I'm not sure what I'm doing wrong. Can anyone offer a hint as to how I can do this?this is exactly how the code is done -
1. emp_name in the View Object
2. emp_name in the where clause
The two are identical. I have tried many variations of this - any time I set the where clause from my bean I get an error.
When I take the SQL stmnt and run it in TOAD it returns expected rows when I run it in the SQL worksheet in JDev it gives an invalid Identifier - but if I hard code the where clause in the View Object it returns the same results as TOAD. -
Howto use jsp with where-clause restriction for viewObject
hello there,
i am currently trying to figure out how to pass parameters via url to the jsp,
so that the corresponding viewobjects where clause can be extended and i only get the select-results that i want. i am familiar with doing this in a stright java-environment but don't know how to implement it in a jsp-client.
does anyone know something about this or can name me a ressource i can read about that.
Thanx
Selim Keserthank you, but i have only 19 days left for
my diploma and nobody in this company can help me with this issue.
what i need is an example or something like a reciept about what to do
to achieve the following:
I want to type in an url like:
localhost:8080/myapp/browse.jsp?customerid=123
so that i can extend the where-clause in my ViewObject
and only see the rows of customer 123 in my jsp.
it is a bit hard for a newbie to figure out how to pass down the parameters way down to the ViewObject. I am shure that this is easy to do once one understands the how it works. This is my first "Web-Experience" and I am running out of time.
Thanx
Selim Keser -
Where clause with Bind Variable in ViewObject
As per recomendations from Jdev team they say that using Bind varialbles in where clause will improve the performance (Option 1) But it is causing us to create more view objects.
Example : Lets say we have a View Object EmpVO
Option 1:
ViewObject vo=context.getViewObject("EmpVO");
vo.setWhereClause("EMPNO=?");
vo.setWhereClauseParam(0,st);
(or)
Option 2:
vo.setWhereClause("EMPNO="+st);
If we want to use same View Object "EmpVO" in another Action Class
ViewObject vo1=context.getViewObject("EmpVO");
vo1.setWhereClause("DEPTNO=?");
vo1.setWhereClauseParam(0,str);
It this case it throws an error saying BIND VARIABLE already exits. So we have to make another View Object.
Where as if we did not use bind variable but used Option 2 approach the same view object can be used in multiple pages.(at the expense of performance as per Jdev team)
Are we doing something wrong here or are there other ways to use the same view object when using bind variable in where clause.
ThanksI haven't been using BC4J for a while, but I seem to recall that the recommendations are that you don't set the where clause at runtime: You're supposed to define your view with the bind parameter already in it.
So you'd probably define an EmpsForEmpNoVO and type "EMPNO = ?" in the where box. (There are other ways of finding a single row/entity and one of those may well be more efficient. Perhaps a better example of where you might want a view of employees is WHERE DEPTNO = ?.)
IIRC, all instances of a particular type of view share the same definition, so you have to be careful if you alter that at runtime. However, I think everything's set up so that you can have many different (and separate) resultsets for a single view (instance) - meaning that it's possible to "run" a view for (e.g.) two different ids. (It's definitely possible to create two different instances of a view from its definition - and the resultsets will definitely be separate then. I think there's a "create" method on the application module; I remember that "find..." always returns the same instance of the view.)
Hope that's a push in the right direction (since no-one else had replied - and I hope not too much has changed since 9.0.3)....
Mike. -
I am using JDev 9.03.
I created a VO and in expert mode I added a where clause that accepts 1 parameter. I have a uiXML page that needs to pass a parameter to a second page and use that parameter in the VO where clause. I need to have the parameter set in the where clause before the page can be rendered. How do I do this?I have been watching another thread and received an answer as to how to do this within a servlet.
Viktor wrote:
You must get exactly the same object that bc4j has created.
From bajacontext you can reach everything...
like appmodule.. and even ViewObject..
Add a null event, which runs before your page is rendered...
<event name="null">
<bc4j:findRootAppModule name="PenCmpAppModule">
<bc4j:findViewObject name="RdmsViewUsage">
<method class="FrmFilters" method="handleRdms"/>
</bc4j:findViewObject>
</bc4j:findRootAppModule>
</event>and create an event handler...
public static EventResult handleRdos(BajaContext context, Page page, PageEvent event)
{ ViewObject vobj= ServletBindingUtils.getViewObject(context);
HttpSession session = context.getServletRequest().getSession(false);
String OrgId=(String)session.getAttribute("S_ORGID");
vobj.setWhereClause("ORG_ID='"+OrgId+"'");
vobj.executeQuery();
return null; } -
ADF Struts UIX - how write where clause whith date in ViewObject
Hello
I need to write a search form with two date fields and then query a where clause between to_date('date 1') and to_date('date 2').
the query may be writed in ViewCriteria class or using Application module method like this
AssureViewImpl assureView=getAssureView1();
assureView.applyViewCriteria(null);
assureView.setWhereClause("NUM_ASSU = :1");
assureView.setWhereClauseParam(0,numAss);
thanks a lot for your helpDoes the user always specify both start and end dates?
-
JSP, Data Web Bean, BC4J: Setting the where clause of a View Object at run time
Hi,
I am trying to develop a data web bean in which the where clause of a View Object will be set at run time and the results of the query then displayed.
My BC4J components are located in one project while the coding for the data web bean is in another project. I used the following code bu t it does not work. Could you please let me know what I am doing wrong?
public void populateOSTable(int P_EmpId)
String m_whereString = "EmpView.EMP_ID = " + P_EmpId;
String m_OrderBy = "EmpView.EMP_NAME";
oracle.jbo.ApplicationModule appModule = null;
ViewObject vo = appModule.findApplicationModule("EMPBC.EMPAppModule").findViewObject("EMPBC.EMPView");
vo.setWhereClause(m_whereString);
vo.setOrderByClause(m_OrderBy);
vo.executeQuery();
vo.next();
String empName numAttrs = vo.getAttribute(EmpName);
System.out.println(empName);
Thanks.<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by JDev Team (Laura):
Here is how I have usually done mine:
1. In the JSP, use a RowsetNavigator bean to set the where clause and execute the query.
2. Use a custom web bean to process the results of the query (print to HTML).
for example:
<jsp:useBean class="oracle.jbo.html.databeans.RowsetNavigator" id="rsn" scope="request" >
<%
// get the parameter from the find form
String p = request.getParameter("p");
String s = request.getParameter("s");
// store the information for reference later
session.putValue("p", p);
session.putValue("s", s);
// initialize the app module and view object
rsn.initialize(application,session, request,response,out,"wt_bc_WT_bcModule.wtjoinView");
// set the where clause string
String theclause = "presname = '" + p + "' AND slideno=" + s;
// set the where clause for the VO
rsn.getRowSet().getViewObject().setWhereClause(theclause);
rsn.getRowSet().getViewObject().executeQuery();
rsn.getRowSet().first();
%>
</jsp:useBean>
<jsp:useBean class="wt_bc.walkthruBean" id="wtb" scope="request" >
<%
// initialize the app module and VO
wtb.initialize(application,session, request,response,out,"wt_bc_WT_bcModule.wtjoinView");
wtb.render();
%>
In this case, the render method of my custom web bean mostly gets some session variables, and prints various content depending on the session variable values.
Hope this helps.
</jsp:useBean><HR></BLOCKQUOTE>
Laura can you give the code of your walkthru bean? i wna't to initialize a viewobject, set the where clause and give that viewobject back to initialize my navigatorbar.
Nathalie
null -
How can you add a where clause using "OR" with applied ViewCriteria?
[JDeveloper 10.1.3 SU4]
[JHeadstart 10.1.3 build 78]
I am using JHeadstart, but have a question probably more in the ADF area. On the JHeadstart forum I asked:
"I am overriding JhsApplicationModule's advancedSearch in order to be able to search in childtables. I created transient attributes, display those in advanced search and in the overridden method I check if any of these are filled by the user and create a where clause like 'EXISTS (SELECT 1 FROM <childtable> WHERE <column in childtable> = <column in EO's table> AND <another column in childtable> LIKE '<value supplied by user>)'. I add this whereclause using ViewObject.setWhereClause.
So far so good and it works. However, if the user selects 'Result matches any criteria', combining setWhereClause and the normal advancedSearch QueryByExample implementation using ViewCriteriaRow do not provide the desired result, since the ViewCriteria and the setWhereClause are AND-ed together, which is fine if the user selects the (default) "Results match all criteria" (everything is AND-ed) but not the "Result matches any criteria", since then every criterium is OR-ed together, except for the setwhereclause criteria and the set of ViewCriteriaRows, they are AND-ed.
I looked if I could specify that a WhereClause will be OR-ed to existing applied ViewCriteria, but no luck. Do I have to rewrite also advancedSearch's ViewCriteria implementation and write an entire setWhereClause implementation to be able to "OR" every criterium? Or any other suggestions? Can I look at the entire Where clause and rewrite it (after applyCriteria and setWhereClause are called on the VO)?
Toine"
Sandra Muller (JHeadstart Team) told me today: "This sounds like a JDeveloper/ADF issue that is not related to JHeadstart. The question is: how can you add a where clause using "OR" if there are already one or more ViewCriteria applied?
To simplify the test case, you could create a simple ADF BC test client class in a test Model project without JHeadstart (in the test class, use bc4jclient + Ctrl-Enter), in which you first apply a few ViewCriteriaRows to a View Object and also add a where clause.
Can you please log a TAR at MetaLink ( http://metalink.oracle.com/ ), or ask this question at the JDeveloper forum at http://otn.oracle.com/discussionforums/jdev.html ? (This what I am doing now ;-))
Thanks,
Sandra Muller
JHeadstart Team
Oracle Consulting"
Anyone knowing the answer or am I asking for an enhancement?
ToineHi,
Can you SET your whereclause as follows ?
('Y' = <isAnd>
and EXISTS (SELECT 1 FROM <childtable> WHERE <column in childtable> = <column in EO's table> AND <another column in childtable> LIKE '<value supplied by user>))
OR ('N' = <isAnd>
AND EXISTS (SELECT 1 FROM <childtable> WHERE <column in childtable> = <column in EO's table> OR <another column in childtable> LIKE '<value supplied by user>))
) -
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. -
How to set dynamic where clause in ADF?
Hi,
I have a View object called BillInfoVO. This has
all the information about who created the request, the time , status etc.,
I need to display this VO in a jsp. But before I display, i need to fileter this
VO results with different where clauses according to the role of the user.
For example, if the role is admin, then
where clause should be 'status = 'Completed, and created by = 'Current user'
If the role is requestor, then
the where clause should be
sales manager id = 'Current user' and
Status != Complete etc.,
Could any one please let me know how I can
dynamically set the where clause to filter the appropirate
result row set in the jsp?
Your help will be greatly appreciated.
Thanks,
venkiYou'll create a service method in your AM that will use the setWhereClause method of a viewobject.
Then you'll expose it as a client method.
Then you'll drag it from your data-control onto a button in your JSF page that will call your page for the query.
More about service methods here:
http://download.oracle.com/docs/html/B25947_01/bcservices003.htm#sm0206
http://download.oracle.com/docs/html/B25947_01/bcquerying008.htm#sthref286 -
How to populate bind variable in view objects where clause in ADF faces
I've got a page with 2 input items.
The user manually enters the first value.
On the second input item I have created a LOV for the item which opens in a popup. How do I restrict the data returned in the LOV using the value entered in the first input item. I have created a bind variable and have included it in the where clause for the view object but how do I populated it.Here is an example:
Using the HR schema with the EMPLOYEES and DEPARTMENTS tables.
Example is using ADF BC and created an EMPLOYEES entity with an updateable view object for page,
and created a DEPARTMENTS view as a lookup
(SQL: select department_id, department_name from departments where department_name = :DeptName)
1: add method to the backing bean to filter the LOV
public void getTextValueToFilterLOV(ValueChangeEvent valueChangeEvent) {
Object value_from_form = valueChangeEvent.getNewValue();
FacesContext fctx = FacesContext.getCurrentInstance();
Application fapp = fctx.getApplication();
JUFormBinding formBinding = (JUFormBinding)fapp.createValueBinding("#{bindings}").getValue(fctx);
DCIteratorBinding dcBinding = (DCIteratorBinding)formBinding.get("DeptLOVIterator");
ViewObject vo = dcBinding.getViewObject();
vo.setNamedWhereClauseParam("DeptName",value_from_form);
vo.executeQuery();
2. add valueChangeListener to the inputText on the page with an id and autoSubmit="true"
<af:inputText value="#{bindings.LastName.inputValue}" label="#{bindings.LastName.label}" binding="#{backing_DeptForm.inputText3}"
id="inputText3"
autoSubmit="true"
valueChangeListener="#{backing_DeptForm.getTextValueToFilterLOV}">
</af:inputText>
3. reference the LOV with the id name on the partialTriggers property
<af:selectOneChoice value="#{bindings.EmployeesUpdView1DepartmentId.inputValue}"
label="#{bindings.EmployeesUpdView1DepartmentId.label}" binding="#{backing_DeptForm.selectOneChoice1}"
id="selectOneChoice1"
partialTriggers="inputText3">
<f:selectItems value="#{bindings.EmployeesUpdView1DepartmentId.items}"
binding="#{backing_DeptForm.selectItems1}"
id="selectItems1"/>
</af:selectOneChoice>
Summary:
When you entered a text (LastName), that value is passed into the backing bean method.
The Bean method code will find the LOV Iterator and put the value into the bind variable.
Cheers,
Jim -
Pagination after executequery with a dynamic where clause
Hi all,
I have a problem with pagination after setting a where clause dynamically and performing an executequery in ViewObjectImpl.java.
As a result of this, the amount of records are decreased returned by the viewobject, however the pagination is not changed. It still reflects the previous amount. It changes only if you have selected the last range of the changed recordset
Does anybody know how to get the pagination to refect the correct amount of the updated recordset of the viewobject?
Jdeveloper version 10.1.3.4 / Jheadstart 10.1.3.3.81
Thanks in advance, ErwinHi,
I would not add this to the VO query. Instead I would create a View Criteria that uses a bind variable. Then in the Application Module Data Model, you select the VO instance and choose edit (button on top) to permanently associate the view criteria)
Advantages of this approach
- The VO definition can be used elsewhere without the restriction
- the bind variable is not mandatory and yu can set it such that if no value is provided a full query is executed
Frank -
Hi,
I am trying to implement a where clause in the VO. I followed the steps but getting an error. My questions is, before executing the query, how to know the exact SQL statement which is going to get processed after we pass parameters using whereclauseparam?
One more question which i would like to ask you guys. In the Select statement which we use in a VO, at runtime we need to add a where clause. So in this whereclause, the column names which we use are the actual database column names or the names which the VO displays in the ViewObject?
Thank youHi,
An Example for you and I hope it clear your doubts.:--
Method in Method to Your EmployeeFullVOImpl Class
import oracle.jbo.domain.Number;
import oracle.apps.fnd.framework.OAException;
public void initQuery(String employeeNumber)
if ((employeeNumber != null) &&
(!("".equals(employeeNumber.trim()))))
// Do the following conversion for type consistency.
Number empNum = null;
try
empNum = new Number(employeeNumber);
catch(Exception e)
throw new OAException("AK", "FWK_TBX_INVALID_EMP_NUMBER");
setWhereClause("EMPLOYEE_ID = :1"); // TABLE COLUMN
setWhereClauseParams(null); // Always reset
setWhereClauseParam(0, empNum);
executeQuery();
} // end initQuery()
You can get the sql query in Jdev itself & also get information like about the bind variable which set at run time ==>
Lets say, for this exercise, I wish to find the exact piece of SQL Statement that my screen fires, when doing an update.
In order to do so, we can append text -Djbo.debugoutput=console to runner property As shown below, I can enter the following text in Runner property of jDeveloper.
For more details go to this link dear.
http://oracle.anilpassi.com/debugging-oa-framework-7-different-techniques-2.html
For more details about setting VO attribute at runtime go to jdevdoc/WebHelp/toolbox/toolbox.htm. Exercise: Drilldown to Details Page
I hope i answered all your questions.
Thanks
--Anil -
Where clause - parentheses versus view link
I have detail View Object DetailVO with where clause "status=1 or status=2" and I add it to AM as detail of masterVO.
Then the link doesn't work, I suppose BC4J create new where clause as "status=1 or status=2 and :1=....". But it means "status=1 or (status=2 and :1=....)"!!!
I put detail VO where clause into parentheses "(status=1 or status=2)" and everything was OK - ViewLink worked.
It is very bad feature of ViewLinks, isn't it?
JanWell, now I know I must always surround OR clauses with parenthesis.
But I was very confused about it. My ViewLink didn't work and I did't know why... I think, that if BC4J adds ViewLink condition, that it must handle the ViewObject whereClause and surround it with parenthesis. Otherwise it is very strange behaviour, isn't it? Added ViewLink condition shouldn't affect the original whereClause!
Any JDevTeam comment?
Jan
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