Optional parameter, no values

Hi,
I have an optional parameter in CR2008; I would like to print the choosen parameter values into the report header. This works great by using this function:
Join({?MyParameter},", ")
However, when no values were selected I get the error message "Parameter has no value".
So I adapted the function:
if hasvalue({?MyParameter}) then Join({?MyParameter},", ") else "All records"
The function is correct but I still get the error message (error dialog window).
How can I suppress the error message?
Thanks!

Ian,
Tip of the day: You can show the <> signs in the forum by using & lt; and & gt;. Just remove the spaces after the &.
It also works in code blocks...
{@Field} <> 123
Jason

Similar Messages

SSRS 2008 optional parameter ? Value still required if I check allow null

I know there are other posts about this and Ive read them, but I still dont see how to allow the user to skip making a selection for that particular parameter. I have two parameters on a report. One of them Id like the user to be able to simply
not choose anything if they want to, and have that default to NULL. Im handling that in the query for the dataset.
Ive seen the suggestions to include some "ALL" selection in the list by way of a union
Does a user HAVE to make a selection of a dropdown list?

If you have specified a Default Value for parameter then user need not select any value. User can directly click on View Report.
- Vishal
SqlAndMe.com

Passing optional parameter to subreport

Hi,
I am having a CR 2008 report based on BW query. The query has optional parameter (the value can be set to NULL). When I try to use this report as subreport in my main report, I am unable to pass Null(equivalent to set to NULL) to my subreport using subreport link. I tried blank and "" in a formula field and try to link it to the subreport parameter but it doesn't work. Kindly guide me in this regard.
Thanks and Regards,
Subbu S

Hi Subbu,
Try to create a formula and pass the formula value to your sub report parameter and in sub report record selection based on main report formula value try to filter the records.
Ex: Main report create the following formula :
Whileprintingrecords;
Shared Stringvar x;
If not hasvalue({?Optional}) then
x:='No Value'
else
x:={?Optional}
Now link this to your sub report parameter
In sub report record selection
If {?parameter} = 'No Value ' then true else {?Parameter} = FieldValue.
Thanks,
Sastry

Missing Parameter Values CR2008 Optional Parameter

Hi,
I am getting "Missing Parameter Values" error
"CrystalDecisions.CrystalReports.Engine.ParameterFieldCurrentValueException: Fehlende Parameterwerte. ---> System.Runtime.InteropServices.COMException (0x8004100E)"
if I try to export a Report with an optional Parameter without setting the parametervalue.
The Report works fine with ReportViewer.
If I uncomment the "Parameterpart" and set a parametervalue it works fine, but it should works without a parametervalue too, its optional.
I have tried many for a long time and read many Websites but it does not work !
I use WinXP SP2 CR2008 with C# .NET 2.0 VS2005
CrystalDecisions.CrystalReports.Engine.dll version 12.0.2000.683 Date: 2008-03-01
CrystalDecisions.Shared.dll version 12.0.2000.683 Date: 2008-03-01
Sorry my English is very Bad !
Thanks a lot!
ExportFormatType ExportType = ExportFormatType.PortableDocFormat;
            ReportDocument RD = new ReportDocument();
            RD.Load("C:\\ParaTest01.rpt");
            string strServer = "<ServerName>";
            string strDB = "<DBName>";
            string strUser = "<UserID>";
            string strPW = "<PW>";
            RD.SetDatabaseLogon(strUser, strPW, strServer, strDB);
            //ParameterFieldDefinitions crParameterFieldDefinitions = RD.DataDefinition.ParameterFields;
            //ParameterFieldDefinition crParameter1 = crParameterFieldDefinitions[0];
            //ParameterValues crParameter1Values = crParameter1.CurrentValues;
            //ParameterDiscreteValue crDiscrete1Value = new ParameterDiscreteValue();
            //crDiscrete1Value.Value = "GER";
            //crParameter1Values.Add(crDiscrete1Value);
            //crParameter1.ApplyCurrentValues(crParameter1Values);
            RD.ExportToDisk(ExportType, "C:\\Test2.pdf");
RecordSelectionFormula in Report:
(not HasValue({?Land}) OR {tab.location_code} = {?Land}) and
{tab.sup} = "XXX" and
{tab.Accounting_Period} = "200801"

You need to be careful when using optional parameters. If you are using the optional parameter in a record selection formula you'll need to check and make sure it has a value before you use it. There is a function call HasValue() that you can use to do this.
If you have an optional parameter in the record selection formula and you don't pass a value you'll need to make sure your selection formula can be completed with out it.
This is an excerpt from our help file.
Crystal Reports supports optional parameters. An optional parameter is a prompted value that does not have to be supplied by the user.
Report designers should provide some guidance to the end user that a parameter is optional by adding this information to the prompt text.
Optional parameters are treated by Crystal Reports as optional anywhere within the report that they are used. You cannot set one instance of the parameter to optional and another to mandatory.
Note: After you set a parameter to optional, if you use the Select Expert, the system will automatically add the selection formula for you using the HasValue() function.
The Formula Workshop Editor does not automatically add the formula. Only the Select Expert automatically adds the formula for you.
If you change the parameter from optional to mandatory, the HasValue() function is not automatically removed from your formula.
Handling a parameter with no value
When the report engine evaluates any formula which references an optional parameter that does not have a value, it generates a runtime error. All formulas that reference an optional parameter should first use the HasValue() function to check if that parameter has a value before evaluating it. This includes record selection formulas and saved data formulas.
Note: The system will not automatically drop a statement from the SQL WHERE clause. It is the report designeru2019s responsibility to decide which statement to leave out based on HasValue() testing.

Optional Parameter without a value

Hi, I'm using Discoverer 10g.
Somebody knows what is passed when an optional parameter (a parameter which doesn't require a user to enter a value) is left without a value ?
I didn't understand actually if is passed NULL, 'NULL', '',' '...
I need to know it because I need to wrap this "value" in order to pass it to a function on the DB.
The user have to be the possibility to write something or leave it without a value.
Thanks
Alessandro

Hi,
While running the Discoverer Report, just leave the parameter as blank.
Discoverer passes it as NULL to execute the query.
In the function, where you are passing this parameter, use NVL() to defualt the NULL value. If you want to pass "this value" manually into function, you can still leave it as blank and NVL will take care of it.
Hope this helps!
Yogini

OPTIONAL PARAMETER WITH NO VALUE SELECTED

I have an optional parameter and I want to place the selected value in the Page Header. Since the selected value is a number, I want to give it a name. The problem I am having is when I don't select a value, my naming forumula doesn't work. I tried the HasValue function, but I don't think I'm using it properly.
// This did not work
IF {?SUPPLIER}= 10001 THEN "NESTLE PRODUCTS ONLY" ELSE
IF {?SUPPLIER}= 10005 THEN "UNILEVER PRODUCTS ONLY" ELSE
"ALL PRODUCTS"
// This did not work
If (not hasvalue){?SUPPLIER} then "ALL PRODUCTS" ELSE
IF {?SUPPLIER}= 10001 THEN "NESTLE PRODUCTS ONLY" ELSE
IF {?SUPPLIER}= 10005 THEN "UNILEVER PRODUCTS ONLY" ELSE
"NESTLE AND UNILEVER PRODUCTS ONLY"
Got any suggestions?

Hi,
Well if you select multiple values in a parameter and drag the parameter or the formula containing the parameter, then it would always display the first selected value.
Here's a dirty way:
If NOT(HasValue({?SUPPLIER})) then "ALL PRODUCTS" ELSE IF
ubound({?SUPPLIER}) = 1 then
        IF {?SUPPLIER}= 10001 THEN "NESTLE PRODUCTS ONLY" ELSE
        IF {?SUPPLIER}= 10005 THEN "UNILEVER PRODUCTS ONLY" ELSE
        "NESTLE AND UNILEVER PRODUCTS ONLY"
ELSE IF
ubound({?SUPPLIER}) = 2 then
"NESTLE AND UNILEVER PRODUCTS ONLY"
Let me know how this goes!
-Abhilash

How to use a parameter field value as a substring in a "like" statement?

Hi all,
I'm trying to use a parameter field in a Record selection formula where the parameter field value would be a substring of the data stored in the field.
My parameter field (SlctResearcher) is constructed as follows:
Type: string
List of Values: static
Value Field: (Reports) RptAuthors
(in Value Options) Allow custom values?: True
{Reports.PubDate} in DateTime (2009, 04, 01, 00, 00, 00) to DateTime (2010, 03, 31, 23, 59, 59) and
{Reports.RptAuthors} like "*{?SlctResearcher}*"
When I hit F5 to generate the data, I get no results (and the parameter prompt field does not even come up...)
If I modify the formula to put a hard-coded string, like
"*Jones*"
after the 'like', I get results (all the reports where "Jones" is a substring in the RptAuthors string.) If I modify the formula to just use the parameter field without the quotes/stars like:
{Reports.PubDate} in DateTime (2009, 04, 01, 00, 00, 00) to DateTime (2010, 03, 31, 23, 59, 59) and
{Reports.RptAuthors} like {?SlctResearcher}
I do get the parameter prompt field, but still no results even if I put in a valid substring value (since it is not searching for a substring anymore...)
How can I do this?
Thanks,
Will

1st thing... Make a copy of your report before doing anything!!!
To use a SQL Command, you'll want to open the Database Expert and look at the Current Connections. Expand the data source and the 1st option you see is the Add Command option.
To find the SQL That CR is currently using, choose Database from the menu bar and select Show SQL Query...
You can copy this and paste it directly into the command window. (If you you can write your own SQL you don't need copy CR's, it's just an option.)
You'll also want to take not of any parameters that you have, you'll need to add them the the Parameter List of the command as well... be sure to spell them EXACTLY as they are in the design pane.
Anyway, once the SQL statement is in the Command window you'll be able to alter the WHERE clause to use the wild cards.
For future reference... What type of database are you reporting against???
Jason

CR 2008 - Optional parameter prompts

Hi!
I sometimes use Optional parameter prompts in Crystal Reports 2008.
The main reason is to minimise user input in Selection Criteria Screen.
I have many subreports, and not all prompts are needed for all subreports.
If the user leaves the prompt blank, then a formula will set a default value for the user.
I usually put the optional prompt at the top, so that user needs only fill prompts at the bottom.
Here is an example:
I have a parameter field called "PreferredSortOrder"
The Edit screen reads as follows:
Type: String
List of Values: Static
Value:
    Original Order
    Description
Value Options:
Show on (Viewer) Panel           : Read Only
Prompt Text                              : Preferred Sort Order [Optional]
Prompt With Description Only : True
Optional Prompt                        : True
Default Value                             :
Allow custom values                 : False
Allow multiple values                 : False
Allow discrete values                 : True
Allow range values                     : False
Min Length                                  :
Max Length                                  :
Edit Mask                                   :
Show value or Description        : Show Value
My report works perfectly, even if I leave the parameter field blank
I now add another parameter field called "WhichWarehouse"
with exactly the same values as above.
When I run the Crystal Report, I get this message;
Error running Crystal Reports
The report runs only if I type a value in the "WhichWarehouse" prompt
(The "PreferredSortOrder" prompt remains blank)
I did exactly the same as before. Why does the 2nd optional parameter not work like the first?
What has gone wrong?
Thank you
Leon Lai
JUST ADDED
I just noticed that in the Field Explorer,
(a) There is a green TICK near the parameter PreferredSortOrder
(b) But no green Tick neat the parameter "WhichWarehouse"
What does the green tick mean?
Could this be the key to the mystery?

Hi Leon,
No green tick means that the prompt has Not been used in the report.
If the report has Subreports, and if the subreport also has a 'warehouse' prompt then it could be this prompt that is causing the issue. You should link both the warehouse prompts to make sure you're only prompted once.
-Abhilash

Optional Parameter in ODSI

Hi,
I have to create a Optional Parameter in ODSI function as given following :
xquery version "1.0" encoding "UTF-8";
(::pragma xds <x:xds targetType="urn:AddressInfo" xmlns:x="urn:annotations.ld.bea.com" xmlns:urn="http://www.wcbsask.com/employeerCoverage/AddressInfo"><creationDate>2010-10-15T15:19:40</creationDate><userDefinedView/></x:xds> ::)
declare namespace wbt= "ld:Physical/CBC";
import schema namespace ns1="http://www.abc.com/employeerCoverage/AddressInfo" at "ld:Logical/AddressInfo/schemas/AddressInfo.xsd";
declare namespace tns="ld:Logical/AddressInfo/SampleOptional";
(::pragma function <f:function kind="read" visibility="public" isPrimary="true" xmlns:f="urn:annotations.ld.bea.com"/>::)
declare function tns:getSampleOptional($formNum as xs:string,$optinalInput as xs:integer?) as element(ns1:AddressInfo)?{
for $cbc in wbt:CBC()
where $formNum eq $cbc/FORM_NUM
return
<ns1:AddressInfo>
if(exists($optinalInput))then
<ns1:regNum>{fn:data($CBC/FORM_NUM)}</ns1:regNum>
else(
<ns1:cusNumber>{fn:data($optinalInput)}</ns1:cusNumber>
</ns1:AddressInfo>
when i am passing the form number as some value and OptionalInput as null(since the parameter is optional). I am getting error as
com.bea.dsp.das.exception.DASException: weblogic.xml.query.exceptions.XQueryDynamicException: {err}XP0021: "": can not cast to {http://www.w3.org/2001/XMLSchema}integer: error: decimal: Invalid decimal value: expected at least one digit
     at com.bea.dsp.das.ejb.EJBClient.invokeOperation(EJBClient.java:160)
     at com.bea.dsp.das.DataAccessServiceImpl.invokeOperation(DataAccessServiceImpl.java:171)
     at com.bea.dsp.das.DataAccessServiceImpl.invoke(DataAccessServiceImpl.java:122)
     at com.bea.dsp.ide.xquery.views.test.QueryExecutor.invokeFunctionOrProcedure(QueryExecutor.java:113)
     at com.bea.dsp.ide.xquery.views.test.XQueryTestViewContent.getFunctionExecutionResult(XQueryTestView.java:1041)
     at com.bea.dsp.ide.xquery.views.test.XQueryTestViewContent.executeFunction(XQueryTestView.java:1176)
     at com.bea.dsp.ide.xquery.views.test.XQueryTestViewContent.widgetSelectedImpl(XQueryTestView.java:1866)
     at com.bea.dsp.ide.xquery.views.test.XQueryTestViewContent.access$300(XQueryTestView.java:174)
     at com.bea.dsp.ide.xquery.views.test.XQueryTestViewContent$3.run(XQueryTestView.java:1594)
     at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)
     at com.bea.dsp.ide.xquery.views.test.XQueryTestViewContent.widgetSelectedBusy(XQueryTestView.java:1597)
     at com.bea.dsp.ide.xquery.views.test.XQueryTestViewContent.widgetSelected(XQueryTestView.java:1560)
     at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227)
     at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
     at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
     at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3687)
     at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3298)
     at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
     at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
     at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
     at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
     at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
     at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
     at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
     at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
     at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169)
     at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
     at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
     at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
     at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)
     at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
     at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
     at org.eclipse.equinox.launcher.Main.eclipse_main(Main.java:1148)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at com.m7.installer.util.NitroxMain$1.run(NitroxMain.java:33)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Kindly help in the issue.
Regards,
Tara

"when i am passing ... and OptionalInput as null"
What does that mean exactly? From the exception, it looks like you are just leaving the text box blank. For 'null' you have to check the 'null' check-box beside it.

How to set no_value to Optional parameter in XI 3.0 by OpenDoc URL linking

I found in "BusinessObjects XI 3.0 Viewing reports and documents using URLs Howto.doc"
"You can remove an optional parameter from the prompt by setting it to no_value in the OpenDocument query string."
I tested: response.sendRedirect("/OpenDocument/opendoc/openDocument.jsp?sIDType=CUID&iDocID=AaVxpKuKNBxKnHUJCqwuRi0&lsSCountry=""no_value""&token=" + logonToken);
But it will filter no data, because no country call "no_value". I still need to delete the value, and click Apply, to get all data.
I wonder how to achieve optional parameter via opendocument linking, to get a report with "full data set".
Any one can help?
Thanks in advance!
Jennie

Hi Jennie,
I'm wondering if "1203675 - Cannot specify an empty string for an optional string parameter through the refresh prompts page which displays "no value" unlike the parameter panel" is related to this.
Instead of using no value or empty string, how about if you use ALL value for the parameter to bring full data? Check "1218621 - Option "All" in list of values for a dynamic prompt in XI"
Hitomi

Optional Parameter - Oracle Package Throws an Error

Hi there,
I have an Oracle Package & it has a stored procedure with optional parameter. The calling code is in ColdFusion.
When I run my webpage the Oracle throws below error.
" [Macromedia][Oracle JDBC Driver][Oracle]ORA-06550: line 1, column 7: PLS-00306: wrong number or types of arguments in call to 'GET_CONTRACT_BY_DYN_SQL' ORA-06550: line 1, column 7: PL/SQL: Statement ignored "
Calling Code (ColdFusion)
<cfstoredproc procedure="CONTRACTS_PKG.GET_CONTRACT_BY_DYN_SQL" datasource="#REQUEST.dsn#">
<cfprocparam cfsqltype="CF_SQL_INTEGER" type="in" value="1" variable="P_CONTRACTID">
<cfprocresult name="qDataDynSQL" resultset="1">
</cfstoredproc>
<br>Dynamic SQL Query:
<cfdump var="#qDataDynSQL#" label="Dynamic SQL Query">
Oracle Package
create or replace
PACKAGE CONTRACTS_PKG AS
TYPE T_CURSOR IS REF CURSOR;
PROCEDURE GET_CONTRACT_BY_DYN_SQL(P_CONTRACTID IN NUMBER, P_COLS IN VARCHAR2 DEFAULT '*', IO_CURSOR IN OUT T_CURSOR);
END CONTRACTS_PKG;
create or replace
PACKAGE BODY CONTRACTS_PKG AS
-- Get Contract Using Dynamic SQL
PROCEDURE GET_CONTRACT_BY_DYN_SQL(P_CONTRACTID IN NUMBER, P_COLS IN VARCHAR2 DEFAULT '*', IO_CURSOR IN OUT T_CURSOR)
IS
V_CURSOR T_CURSOR;
V_SQL VARCHAR2(200);
BEGIN
IF p_contractid > 0 THEN
V_SQL := 'SELECT '|| P_COLS || ' FROM CONTRACTS WHERE contract_id = ' || P_CONTRACTID ;
ELSE
V_SQL := 'SELECT '|| P_COLS || ' FROM CONTRACTS';
END IF;
OPEN V_CURSOR FOR V_SQL;
IO_CURSOR := V_CURSOR;
END GET_CONTRACT_BY_DYN_SQL;
END CONTRACTS_PKG;
Does anyone knows why it throws an error? As you can see in the package header & body the parameter P_COLS has the default value as '*'.
Looking forward to hear from someone.
Thanks,
Hitesh Patel

931198 wrote:
I have an Oracle Package & it has a stored procedure with optional parameter. The calling code is in ColdFusion.
When I run my webpage the Oracle throws below error.Never mind the error - your approach is most definitely a candidate for Oracle WTF.
Nothing sane about this approach. Especially the decision not to use bind variables and slowing down cursor processing significantly by burning a lot more CPU cycles on hard parsing and fragmenting the SQL Shared Pool in the process.
Why not used MS Access instead? It is far more suited as a mickey mouse database for a goofy application?
Why am I badmouthing your approach to Oracle? Because that is exactly the primary cause, the #1 reason, for poor Oracle performance and run-time problems dealing with Shared Pool fragmentation. It is something that many Oracle experts blog about, talk about, write about. It is addressed in numerous books, Oracle documentation, and even Oracle Support Notes.
And despite the amount of information available on how to get the basics rights in using Oracle... this approach you are pursuing still refuses to die. So it deserves to be beaten with a lead pipe when it rears its ugly head here in this forum..

Is the task-flow input parameter class value being ignored by the framework

hi
Although I don't remember where, I think I read or heard about the task-flow input parameter class value that it is "being ignored by the framework".
One example of this could be what is currently in the UI Shell sample application available
at http://www.oracle.com/technetwork/developer-tools/adf/uishellapp-134633.zip
It has in its task-flow in "flows\second.xml" an input parameter configured like
<task-flow-definition id="second">
    
    <input-parameter-definition id="__3">
      <name id="__2">tabContext</name>
      <value>#{pageFlowScope.tabContext}</value>
      <class>oracle.ui.pattern.dynamicShell.TabContex</class>
      <required/>
    </input-parameter-definition>
    
</task-flow-definition>Notice the missing "t" at the end of the class name "oracle.ui.pattern.dynamicShell.TabContex".
Still this task-flow configuration does allow to use expressions like "#{pageFlowScope.tabContext.selectedTabIndex}", which suggests that the class value is indeed "being ignored by the framework".
(see also forum thread "does the UI Shell sample break encapsulation in its task-flows"
at does the UI Shell sample break encapsulation in its task-flows )
All relevant references (bug numbers, documentation, blogs) explaining about this task-flow input parameter class value are welcome.
If no such references exist, maybe someone from Oracle can give some feedback.
many thanks
Jan Vervecken

fyi
The feedback below was posted in the forum message
at Re: does the UI Shell sample break encapsulation in its task-flows
Richard Wright wrote:
That appears to be a bug for which I am seeking confirmation.There is an enhancement request (i.e., 9377487) submitted over a year ago, that describes this behavior. It is listed as an ER as our documentation (e.g., Fusion Developer's Guide for Oracle ADF, online help ) does not specifically state that Java class for the input parameter definition is checked for type. Further anything using EL is untyped. So the expectation that types are enforced is somewhat puzzling to the development team.
However, there is an acknowledgment within circles of the development organization, that some might come to have this expectation. One trigger might be the definition itself. The other is the existence of a design time audit on the definition. For example, if the class is specified inaccurately (e.g., typo), there is an audit warning to report "not found."
Under consideration are a number of framework proposals to check for type without breaking backward compatibility or adding overhead to the production environment.
In the interim, the following recommendations are given.
Unless this breaks or can break your app in some way, no need exist for change. Nevertheless, if this is a real concern, write a test or consider a java assertion. By default, assertions are disabled at runtime. There is no need to override that default.I have been able to find enhancement request 9377487, "TASK FLOW PARAMETER VALUES NOT VALIDATED ACCORDING TO CLASS", on My Oracle Support. It currently has "Status 15 - To Internal (Oracle) Review" and "Updated 16-Dec-2010".
In the context of service request 3-4185839067 recently bug 12838099, "THE TASK-FLOW INPUT PARAMETER CLASS VALUE BEING IGNORED BY THE FRAMEWORK", has been filed and it currently still has "Status 16 - Bug Screening/Triage".
- about "... the expectation that types are enforced is somewhat puzzling to the development team ..."
Hmm, strange ... so what are people supposed to expect when there is an option to configure a class name for a task-flow input parameter?
regards
Jan

How to make Start Date as optional parameter in Crystal reports 2011

Hi All,
I have existing Start Date and End Date parameter how to make them as optional parameters.
Thanks for your help in advance!!.

Hi Mnnica,
There is an option 'Optional Prompt' under value options, make that as true. Do the same for both startdate and enddate then go in Record Selection Formula and write below formula :
If Not (hasvalue({?Startdate}) then True else {?Startdate} >= {databasedatefield}
and
If Not (hasvalue({?Enddate}) then True else {?Enddate} <= {databasedatefield}
Check below screen capture for Optional Prompt options :
-Sastry

Optional parameter

hi
if anybody knows how to use optional parameter in oracle stored procedure,
pls help me
regards
joshy

Take a look to Default Values for Subprogram Parameters
Nicolas.

Optional Parameter in Java.

Hi all,
I am new to java programming... I just wanted to know if we can have Optional parameter in java?. I searched few threads but not found any good result. Few suggested a overloaded method ,i think if it is not provided then there must be a big reason for that. Please let me know if anybody knows exact reason why it is not provied. I am using ver 1.4
~Amod .

class A{
     String a;
     String b;
     String c;
     public A(String a, String b, String c){
          this.a=a;
          this.b=b;
          this.c=c;
     public A(String a, String b){
          this.a=a;
          this.b=b;
          //String c will get a default value when this constructors get called
     public static void main(String args[]){
          A test = new A("a","b","c");
          System.out.println(test.a);
          System.out.println(test.b);
          System.out.println(test.c);
          System.out.println("-------");
          A test_ = new A("a","b");
          System.out.println(test_.a);
          System.out.println(test_.b);
          System.out.println(test_.c);
}Is that what you want?

Optional parameter, no values

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