Required Dependent List of Values in Reports Parameter Form

Dear All,
These days I am facing a problem in Oracle Reports(ver. 2.5). I have develope a report. In the parameter form of this report, I want a list of value (LOV) on the second field which should be dependent on the first field value.
For Example, In The Employee Details report, I have a Parameter form in which there are 2 Parameter fields, 1 is Deptno and the other is Empno. I want to attach a LOV on the Empno field but in this LOV I want to display only those empno's which should be dependent on the Deptno field.
Thanks
Vipin

Hi,
its already online: http://thepeninsulasedge.com/frank_nimphius/2008/04/08/adf-faces-building-adf-dependent-list-boxes-in-adf-faces-table/
Frank

Similar Messages

Difference between dependent list of values in table and form

Hi ,
Is implementing dependent lov in editable table i.e. in adf table different from implementing the same in an adf form.
In one of his posts Frank Nimohius mentioned that he can send us the implemented application for dependent list of values in editable table, if he reads this could you please send me the same.
Has anybody ever implemented depedent list in adf table.
Thanks and regards,
Raksha
Edited by: Raksha Sharma on 7 Jun, 2009 2:48 PM

Hi,
its already online: http://thepeninsulasedge.com/frank_nimphius/2008/04/08/adf-faces-building-adf-dependent-list-boxes-in-adf-faces-table/
Frank

Report Parameter form not showing list of values in Report svr

I was using reports 6i where I used to have list box in report parameter form. I now converted recompiled my reports in 10g and when I run I am not geting the list of values. I get the values as a list below the field
ex.
ITEM :___________
box,book,pencil,rubber,
dvd,floppy...
previously it was coming as a list in the item field
thanks
MG

Hello,
http://www.oracle.com/webapps/online-help/reports/10.1.2/topics/htmlhelp_rwbuild_hs/rwwhthow/howto/params/pmp_creating_list_of_values.htm?tp=true
If you run the report from a Web browser and the list of values is unrestricted, the HTML Parameter Form will display a text field instead of a combo box, and a list of static values that you can copy and paste into the text field.
Regards

Problem using default value of report parameter 1 to validate parameter 2 passed in to report

I am having a problem with an SSRS report using the default value of report parameter 1 to validate parameter 2 passed in to report (via C#) instead of using the value of parameter 1 that is also passed into the report. Here are the
simplified details:
Using SSDT, SQL Server 2008 R2
SSRS report has 2 parameters:
P1 -- text, hidden, default value 'R1', ... front-end C# code can pass 'R2' or 'R1'
P2 -- text, allows multiple values, list of available values provided by stored procedure (sproc_list) that takes P1 value as a parameter. Hence, sproc_list either provides a list for P1 = 'R1' or P1 = 'R2'.
List for P1 = 'R1' is 'A', 'B', 'C'
List for P1 = 'R2' is 'A', 'B', 'D'
Values for P1 and P2 can be passed in via C# to the report.
The C# front-end displays 2 report choices to the user, R1 and R2, where both choices call the same RDL; but choice R1 passes in 'R1' for P1, and the choice R2 passes in 'R2' for P1.
Upon a users 1st time use of the report no parameters are passed in. Then when the user exits the report, the parameter value for P2 that was chosen is saved off to a file for R1 or R2, and used the next time the user selects the report.
Everything always works fine for report R1 since the default value for P1 is 'R1'.
When R2 is chosen and the user selects 'D' as the value for P2, runs the report, then exits, the P2 value of 'D' for R2 is saved to a file. When the user returns the next day to run report R2, 'R2' is passed for P1, and 'D' is passed for P2.
This is when the problem occurs. The value of 'D' for P2 is validated against a list generated for P2 based on the default value of 'R1' for parameter P1. Hence, SSRS considers 'D' an invalid value for P2 and blanks out the P2 parameter.
The user can then use the drop down list for P2 and choose 'D', but this defeats the purpose of saving the parameter values to be used the next time.
Why is the stored procedure that provides a list of available values for parameter P2 using the default value of 'R1' for parameter P1 instead of using the value of 'R2' passed into the report for parameter P1?

Hi Tom,
Sorry for my delay.
If I understand correctly, you have two parameter in your report. It is a couple of cascading parameter. If we have choose ‘R1’ of P1, the P2 values is A, B, C. ‘R2’ of P1, corresponding P2 values is A, B, D. What your requirement is to save the end use
select option of these two parameters.
In SSRS, if we have configure the parameter with default value. When we run the report, the parameter will fill with the default value to filter data. If we want to save the last status we are render the report, we need to update the default value of P1.
If we are query the default value from database, if possible, we can
update the database try to resolve the issue. Alternatively, we can set the dynamic default value for the parameter.
Hope this helps.
Regards,
Alisa Tang
Alisa Tang
TechNet Community Support

Passing list of values as a parameter to repot through form

hi,
i am trying to passing parameters to report through form by
using ADD_PARAMETER_LIST and RUN_PRODUCT .but i am not able to
pass list of values to report.For example if use select state_id
from the list box,it has to give all details of that state
report.how to do this?
please help me.
thanks in adv
rao
null

rao (guest) wrote:
: hi,
: i am trying to passing parameters to report through form by
: using ADD_PARAMETER_LIST and RUN_PRODUCT .but i am not able
to
: pass list of values to report.For example if use select
state_id
: from the list box,it has to give all details of that state
: report.how to do this?
: please help me.
: thanks in adv
: rao
there are at least two path to do that:
1. for each detail item mak a parameter in reports and add it to
paramlist
2. pass only stade_id as parameter and in reports query other
details
hope this helps
null

Not getting Reports Parameter Form in web-forms environ

I am not able to get a report parameter form to appear for a
report called from forms via a 'run_product' command. It works
fine in client/server mode. In web-forms the report just goes
ahead and runs without the needed parameters. I have tried
explicitly passing a parameter list with the 'paramform' set to
'yes' and this did nothing. I have this on a NT box with latest
Dev2 patches applied.
1. Is the reports parameter form supposed to work in web-forms
mode?
2. How do you set it up to work, if it is supposed to work?
Thanks for any replies.
null

I guess you have to use web.show_document - I found this article
on DevConnect:
Article-ID: <Note:68647.1>
Circulation: PUBLISHED (EXTERNAL)
Platform: GENERIC Generic issue
Subject: How to show Reports HTML PARAMFORM when
calling Reports
from Forms
Modified-Date: 09-AUG-1999 18:02:04
Document-Type: BULLETIN
Content-Type: TEXT/PLAIN
Impact: MEDIUM
Component: SQLREP
PURPOSE:
This bulletin explains how to overcome the current restriction
of calling an Oracle Report from Oracle Forms and showing a
PARAMETER FORM. This is currently not possible when using the
RUN_PRODUCT built-in with
WEB DEPLOYED APPLICATIONS.
DESCRIPTION:
When you call an Oracle Report from Oracle Forms using
RUN_PRODUCT in Client-server, you can specify an optional
parameter called PARAMFORM to display the parameter form defined
in the Oracle Report.
For web-deployed applications, the PARAMFORM parameter can be
set to HTML to produce a HTML version of the parameter form.
When calling Oracle Reports from an Oracle Form using
RUN_PRODUCT and specifying PARAMFORM=HTML in the parameter list,
the Oracle Reports parameter form doesn't show the in the client
browser. If the Oracle Reports Cartridge/CGI is used and
PARAMFORM=HTML is specified, then the Oracle Reports parameter
form does appear in the client browser.
Oracle Forms does not use either the Cartridge or the CGI with
RUN_PRODUCT, and it's these thin clients that produce the HTML
Oracle Reports parameter form.
As a workaround to this problem, you can use either the
Cartridge or the CGI with the WEB.SHOW_DOCUMENT Oracle Forms
builtin. This does require either the Oracle Reports Cartrige
or the CGI to be installed. Neither of these are necessary if
the parameter form isn't required.
INSTRUCTIONS:
The following items need to be installed:
1. Oracle Reports Multi-tier Server.
2. Oracle Reports Web Cartridge
or
Oracle Reports Web CGI.
Here is a typical URL that can be specified in a browser
to run a report using Oracle Reports Cartridge implementation:
http://your_webserver/r30ows?
server=repserver21+report=emp_30.rep+
destype=cache+desformat=html+userid=scott/tiger@mydb+paramform=ht
ml
For CGI implementation:
http://your_webserver/your_vir_cgi_dir/r30cgi32.exe?
server=repserver21+report=emp_30.rep+destype=cache+desformat=html
userid=scott/tiger@mydbparamform=html
The Oracle Reports parameter form now is shown. This can be
used with WEB.SHOW_DOCUMENT issuing the request to execute the
report to the Oracle Reports Multi-Tier Server instead of using
RUN_PRODUCT.
The following code may be added to a program unit, which then
issues the request to run the report:
IF get_application_property(user_interface) = 'WEB' then
/* Use Cartridge configuration with WEB.SHOW_DOCUMENT. */
WEB.SHOW_DOCUMENT('http://your_webserver/r30ows?
server=repserver21+report=emp_30.rep+destype=cache+desformat=html
userid=scott/tiger@mydbparamform=html', '_self');
/* OR for CGI configuration. */
WEB.SHOW_DOCUMENT
('http://your_webserver/your_vir_cgi_dir/r30cgi32.exe?
server=repserver21+report=emp_30.rep+destype=cache+desformat=html
userid=scott/tiger@mydbparamform=html', '_self');
ELSE
/* use RUN_PRODUCT for client-server with PARAMFORM=Yes. */
Add_Parameter(plid, 'PARAMFORM', TEXT_PARAMETER, 'YES');
RUN_PRODUCT
(REPORTS,'emp_30.rep',SYNCHRONOUS,RUNTIME,FILESYSTEM,plid);
END;
RELATED DOCUMENTS:
Developer/2000: Guidelines for Building Applications, Deploying
Applications on the Web (for detailed instructions on setting up
the Oracle Reports Cartridge and CGI)
Laura (guest) wrote:
: I am having the same problem with Dev 6 on NT. The parameter
: screen for reports works in client/server but not web using
run-
: product. I am getting error REP-0788: Warning the value of
the
: restricted LOV parameter is not among the selectable values.
: Any reports without a parameter screen work fine with run-
: product.
: Any help would be appreciated.
null

Problem in Insertion into table through After Report Parameter form trigger

Hi All,
I am getting problem in inserting some data into temp table through Report.
My requirement is like that, I have to do a calculation based on user parameters, and then insert the data into the temp table. I wanted to do this into After Report Parameter form trigger function. I have done all the calculation and wrote all the insert statement in that function. There is no problem in compilation. then I am taking value from this temp table in my formula columns.
When I run this report, it hangs, don't understand what is the problem.Can anybody help me out in this.
Thanks,
Nidhi

The code is as follows:
function AfterPForm return boolean is
CURSOR CUR_RECEIPT(RECEIPT_NUM_FROM NUMBER, RECEIPT_NUM_TO NUMBER) IS
SELECT DISTINCT receipt, item_no FROM xxeeg.xxeeg_1229_sp_putaway WHERE RECEIPT BETWEEN
RECEIPT_NUM_FROM AND RECEIPT_NUM_TO ;
V_CUR_RECEIPT CUR_RECEIPT%ROWTYPE;
begin
OPEN CUR_RECEIPT(:RECEIPT_NUM_FROM, :RECEIPT_NUM_TO);
FETCH CUR_RECEIPT
INTO V_CUR_RECEIPT;
LOOP
EXIT WHEN CUR_RECEIPT%NOTFOUND;
IF V_CUR_RECEIPT.ITEM_NO = 'TEST1' AND V_CUR_RECEIPT.RECEIPT = '12' THEN
INSERT INTO SP_TEMP
(RECEIPT, ITEM_NO, LOCATION1)
VALUES
(V_CUR_RECEIPT.RECEIPT, V_CUR_RECEIPT.ITEM_NO, 10);
UPDATE SP_TEMP
SET LOCATION2 = 12
WHERE RECEIPT = V_CUR_RECEIPT.RECEIPT AND ITEM_NO = V_CUR_RECEIPT.ITEM_NO;
UPDATE SP_TEMP
SET LOCATION3 = 13
WHERE RECEIPT = V_CUR_RECEIPT.RECEIPT AND ITEM_NO = V_CUR_RECEIPT.ITEM_NO;
UPDATE SP_TEMP
SET LOCATION4 = 14
WHERE RECEIPT = V_CUR_RECEIPT.RECEIPT AND ITEM_NO = V_CUR_RECEIPT.ITEM_NO;
ELSE
IF V_CUR_RECEIPT.ITEM_NO = 'TEST2' AND V_CUR_RECEIPT.RECEIPT = '12' THEN
INSERT INTO SP_TEMP
(RECEIPT, ITEM_NO, LOCATION1)
VALUES
(V_CUR_RECEIPT.RECEIPT, V_CUR_RECEIPT.ITEM_NO, 10);
UPDATE SP_TEMP
SET LOCATION2 = 16
WHERE RECEIPT = V_CUR_RECEIPT.RECEIPT AND ITEM_NO = V_CUR_RECEIPT.ITEM_NO;
UPDATE SP_TEMP
SET LOCATION3 = 17
WHERE RECEIPT = V_CUR_RECEIPT.RECEIPT AND ITEM_NO =V_CUR_RECEIPT.ITEM_NO;
UPDATE SP_TEMP
SET LOCATION4 = 18
WHERE RECEIPT = V_CUR_RECEIPT.RECEIPT AND ITEM_NO = V_CUR_RECEIPT.ITEM_NO;
ELSE
INSERT INTO SP_TEMP
(RECEIPT, ITEM_NO, LOCATION1)
VALUES
(V_CUR_RECEIPT.RECEIPT, V_CUR_RECEIPT.ITEM_NO, 10);
UPDATE SP_TEMP
SET LOCATION2 = 19
WHERE RECEIPT = V_CUR_RECEIPT.RECEIPT AND ITEM_NO = V_CUR_RECEIPT.ITEM_NO;
UPDATE SP_TEMP
SET LOCATION3 = 20
WHERE RECEIPT = V_CUR_RECEIPT.RECEIPT AND ITEM_NO =V_CUR_RECEIPT.ITEM_NO;
UPDATE SP_TEMP
SET LOCATION4 = 21
WHERE RECEIPT = V_CUR_RECEIPT.RECEIPT AND ITEM_NO = V_CUR_RECEIPT.ITEM_NO;
END IF;
END IF;
END LOOP;
COMMIT;
CLOSE CUR_RECEIPT;
return(TRUE);
end;
.....................................................................................................................

REP-50134 occurs when using the submit button on the Reports Parameter Form

Good Morning,
I get the "REP-50134: Cache subitem reports does not exist" error after clicking on the Submit Button from a Reports parameter form.
I am using Forms/Reprots 9i.
Using the source code given in the Whitepaper 'Oracle Forms Services - Using Run_Report_Object() to call Reports with a parameter form', all works well when paramform=no, but when I have a Form print a report with paramform=yes, the parameter form appears correctly, but generates the error after clicking the Submit Button.
Any inputs as to causation or possible places to look to solving this problem would be greatly appreciated.
Thank you

Hello and thanks.
The value in the tag is <form method=post action="reports?">
Looking at this I suspect my problem is related to this setting. I am trying to follow all the instructions in the White Papers but they are a little confusing as they are not all exactly the same. Each attempts to explain a specific functionality without regards to the whole.
For instance I believe I need to have the variables P_ACTION, P_USER_CONNECT and P_SERVER_NAME in the report being called and then add a Before Parameter Form trigger to reset the values. But this seems to duplicate and override what has already been sent via the REPORT_OTHERS property. It is a tad bit confusing.
Can you confirm?
Thanks for any clarification you can provide.

Heading Change in "Report Parameter Form"

Hi,
Is there any way to change Headings and presentation on "Report Parameter Form" in 11g,
as shown in
http://3.bp.blogspot.com/_KYY-OV98iIo/TCnw5J8TEaI/AAAAAAAAAHo/9DnTJTs8now/s1600/here03.bmp
is displaying headings like
"Report Parameters" and "Enter Values for Parameters, Enter Start: , Enter End:"
Can they be user given
Farrukh

The parameter form is inside the report and the layout of it can be altered.
The only exception to if there is an automatic parameter form....but that is not the case in the example
that you have shown.
Dave

URGENT: Report parameter form set to yes in calling report from menu

I have write this code for calling report from menu module. But where i put the code
PARAMFORM='YES' to display the report parameter form in order to enter the parameter by user.
DECLARE
pl_id ParamList;
repid REPORT_OBJECT;
v_rep varchar2(100);
v_server VARCHAR2(100);
rep_status varchar2(100);
v_host VARCHAR2(100);
BEGIN
     select rep_server into v_server from reports_data;
     select machine into v_host from reports_data;
     pl_id := Get_Parameter_List('tmpdata');
     IF NOT Id_Null(pl_id) THEN
     Destroy_Parameter_List( pl_id );
     END IF;
     pl_id := Create_Parameter_List('tmpdata');
Add_Parameter(pl_id,'P_C_NAME',TEXT_PARAMETER,:GLOBAL.COMPANY);
Add_Parameter(pl_id,'P_B_NAME',TEXT_PARAMETER,:GLOBAL.BRANCH);
Add_Parameter(pl_id,'P_user',TEXT_PARAMETER,:GLOBAL.user);
     repid := find_report_object('REPORTOBJ');
     SET_REPORT_OBJECT_PROPERTY(repid,REPORT_FILENAME,getpath||'E_open_balance.RDF');
          SET_REPORT_OBJECT_PROPERTY(repid,REPORT_COMM_MODE,SYNCHRONOUS);
          SET_REPORT_OBJECT_PROPERTY(repid,REPORT_DESFORMAT,'htmlcss');
          SET_REPORT_OBJECT_PROPERTY(repid,REPORT_SERVER,v_server);
          v_rep := RUN_REPORT_OBJECT(repid, pl_id);
          rep_status := REPORT_OBJECT_STATUS(v_rep);
          WHILE rep_status in ('RUNNING','OPENING_REPORT','ENQUEUED')
               LOOP
                    rep_status := report_object_status(v_rep);
                         message('Running');
               END LOOP;
          IF rep_status = 'FINISHED' or rep_status is NULL THEN
          WEB.SHOW_DOCUMENT('http://'||v_host||'/reports/rwservlet/getjobid'||substr(v_rep,instr(v_rep,'_',-1)+1)||'?'||'server='||v_server,'_blank');
          ELSE
               null;
     END IF;
END;

Jeneesh,
SET_REPORT_OBJECT_PROPERTY(report_id,REPORT_OTHER,
'paramform=YES
what about this variable ?
P_VAR1 = ........');

How to display Reports parameter form in Oracle Forms 10g.

hello,
am migrating from Forms 6i applications to Forms 10g.
one of my application contain report, that report display parameter form
I wrote below code for WHEN-BUTTON-PRESSED Trigger
DECLARE
pl_id      ParamList;
v_report_id report_object;
v_report varchar2(100);
vjob_id varchar2(100);
vc_rep_status varchar2(100);
BEGIN
pl_id := create_parameter_list('my_list');
add_parameter (pl_id,'P_HOSPITAL_ID',text_PARAMETER,
:bm_hospitals.hospital_id);
add_parameter(pl_id,'PARAMFORM',text_PARAMETER,'NO');
v_report_id := FIND_REPORT_OBJECT('bm_r001');
v_report := RUN_REPORT_OBJECT ( v_report_id,pl_id );
vjob_id := substr ( v_report, length(<reportservername>)+2,
length( v_report) );
vc_rep_status := REPORT_OBJECT_STATUS (v_report);
IF vc_rep_status = 'FINISHED' THEN
     WEB.SHOW_DOCUMENT ('/reports/rwservlet/getjobid'|| vjob_id||
'?server=rep_mohahubkpcomp_ORaHOme_IAS'||'&userid=
bedman/bedman@bedman'||'&paramform=yes','_blank');
ELSE
     message ('Report failed with error message '||vc_rep_status);
END IF;
Destroy_Parameter_List(pl_id);
END;
The Above code is running report and displaying Output perfect but cannot
display the Parameter Form at runtime.
any help in this very thankful.
Regards
Gagan.

In Your code there is a line:
add_parameter(pl_id,'PARAMFORM',text_PARAMETER,'NO');
which actually disables the report parameter form.
The line:
WEB.SHOW_DOCUMENT ('/reports/rwservlet/getjobid'|| vjob_id||
'?server=rep_mohahubkpcomp_ORaHOme_IAS'||'&userid=
bedman/bedman@bedman'||'&paramform=yes','_blank');
displays the report to which vjob_id refers. At this point the report is competed so the parameters userid and paramform are useless.
Hope this helps.
Regards
Bekcic Aleksandar

Urgent! Using Reports parameter forms with RUN_REPORT_OBJECT on 9iAS

Hi all, I am migrating client-server to 3-tier with 9iAS Rel2 on AIX 5.1. The forms and reports are upgraded from Forms4.5 to forms9i and Reprots 2.5. We used to have user defined parameter in parameter form(e.g. articale no.) to select records appearing in the report.
However, the Report parameter form doesn't work on web.
I have read Note : 139546.1 but I want the parameter entered in Report parameter form, not in the Form that call the report.
Does anyone has samples of Forms and Reports doing to achieve that? Thank you very much in advance.
best regards,
Kathy

Kathy,
please have a look at the Forms and reports integration Whitepaper that is available from otn.oracle.com/products/forms. This shows you a coding example of what needs to be done to make parameter forms work on teh Web. This papaer is available for Forms9i/Reports9i and Forms6i/Reports6i
Frank

Report Parameter Form not displayed

When I ran a report using the following procedure code in web-enabled Oracle forms ,
PROCEDURE RUN_REPORT IS
pl_id ParamList;
BEGIN
pl_id := get_parameter_list('tmpdata');
if not id_null(pl_id) then
destroy_parameter_list(pl_id);
end if;
pl_id := create_parameter_list('tmpdata');
add_parameter(pl_id, 'PARAMFORM', TEXT_PARAMETER, 'YES');
run_product(REPORTS, 'D:\ORACLE\DIVISION', SYNCHRONOUS, runtime, FILESYSTEM, pl_id, NULL);
END;
No parameter form was displayed. What do you suspect? Or report parameter form cannot be used in web-enabled Oracle forms.
Hope some experts here broaden my mind!
Many thanks,
Richard

Richard,
passing paramform=yes will do it. However, beside of that I wouldn't recommedn using run_product for reports on the Web, indeed paraneter forms are a bit tricky and don't work out of the box. There is a work around that i documented in a Forms/Reports integration Whitepaper available in teh Forms6i collateral section on otn.oracle.com/products/forms. This description uses run_report_object, addressing the Reports Server.
Frank

Report parameter form in ADF/JHS

I am looking for the best way to develop a ADF page (with or without JHS) similiar to the Headstart report parameter form in Oracle Forms. I found a dynamic parameter form example on Steve Meunch's "Not Yet documented ADF Sample Applications", #93 that seems ideal. Has anyone implemented this approach using the existing Headstart tables? How were the LOV queries handled?
Any feedback would be appreciated.

Hi Carl,
Include PARAMFORM=YES in the URL to display the parameter form in RDF to be displayed in the web.But it is showing a submit and reset button at the top.I am not sure how to get rid of it.Hope this will help
Gracelin

How to refresh list item values before report is run?

We have two SELECT LIST items (drop boxes) on our report. One SELECT LIST has values of "World Region" (e.g. NORTH AMERICA, SOUTH AMERICA, EUROPE, ASIA)
the other SELECT LIST has values of "Subregion" (e.g. NORTHERN EUROPE, SOUTHERN EUROPE, SOUTHEAST ASIA etc...)
The values in the Subregion list are dependent on the value that is chosen from the "World Region" List. Can someone tell up how to update the values in the Subregion list BEFORE we submit the page? We can get these values to update (via sql query) when the page is submitted but that is only happening after the report gets run- which is not what we want. We want the user to select a Region from one SELECT LIST and then see all the qualifying Subregions for that Region in the Subregion SELECT LIST. Only after both Region and Subregion have been selected do we want to run the report. Thank for any help on this.

hey john--
john) things like Scott's reference to "The name of the LOV Item". What does this really mean?
raj) in htmldb there's a concept of items at the page and at the app level. page level items have ui component associated with them. in scott's explanation above, he's talking about using a page-level item with a "Display as" type of "select list w/submit" for your first select list. in that case, he's suggesting you have one select list item drive the values of another. when the self-submitting select list submits the page, it sets an htmldb built-in variable called :REQUEST to the name of the self-submitting select list item. in your follow-up post's example, that'd be "REGION_LIST". scott was explaining how you could control the functionality on your page by adding conditions to things like...
:REQUEST = 'REGION_LIST'
...or using declarative Condition options like "Request = Expression 1" and then putting the string "REGION_LIST" in that Expression1 field. so in your case, you have a report region that you don't want displayed until the user's done selecting from your Subregion list. an easy way to handle that would be to add a hidden item (where "Display as" is set to "Hidden") to your page, for example :P1_LAST_REQUEST, to store the last value of :REQUEST. put a Computation on your page that populates :P1_LAST_REQUEST with :REQUEST each time the page is submitted. then put a Condition on your report region that makes it only render when :P1_LAST_REQUEST != 'REGION_LIST'. so this way your users can select a Region and have the page submit itself. the page will then redraw with the values of subregion list correctly populated (you'd presumably use :REGION_LIST in your subregion LOV query to achieve the filtered values) w/o your report region displayed. the user would then select a correct subregion and click some sort of "run my report" button. this time when the page redraws, :P1_LAST_REQUEST would be set so something other than "REGION_LIST" (it'd be set to whatever you named your "run my report button") and so your report region would display as desired.
hope this helps,
raj

Required Dependent List of Values in Reports Parameter Form

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