Bug 145970 [REGRESSION] Set format in parameter dialog will lose the orginal data set by user.
Reproduce: 1. New a report scalar parameter, "p1", in the initialize dialog, set format to be uppercase. 2. New a data set with query "select * from CLASSICMODELS.CUSTOMERS where CLASSICMODELS.CUSTOMERS.CONTACTFIRSTNAME = ?". And bind the data set parameter to the report parameter "p1". 3. Insert a table into layout view, drag column [CUSTOMERNUMBER], [CONTACTLASTNAME], [CONTACTFIRSTNAME] from Data Explorer into table detail row respectively. 4. Preview. In the pop-up parameter dialog, type "Eric". Press "ok". Actually result: There was no data displayed. Expected result: There is one record whose first name is "Eric" in database.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/actionhandler/BirtCacheParameterActionHandler.java
ScalarParameterHandle parameter = (ScalarParameterHandle) attrBean
							.findParameter( paramName );
					
					
					if ( paramValue != null && parameter != null )
					{
						try
						{
							Object paramValueObj = ParameterValidationUtil
									.validate( parameter.getDataType( ),
											parameter.getPattern( ),
											paramValue, attrBean.getLocale( ) );
							paramValue = ParameterValidationUtil
									.getDisplayValue( parameter.getDataType( ),
											parameter.getPattern( ),
											paramValueObj, ULocale.US );
						}
						catch ( Exception err )
						{
							paramValue = op[i].getValue( );
						}
						
						
						configVar.setName( paramName
								+ "_" + parameter.getID( ) ); 
						configVar.setValue( paramValue );
						handle.addConfigVariable( configVar );
					}
				}
			}