Bug 151535 Parameters are invisable in Joint Dataset
Trying to use "Joint Dataset" combined with parameters within underlaying Data-Sets (neccessary to achive a filtering where clause for a DateTime Field) Parameter editing ( e.g. in Chart designer) do not show the entire parameter. As specified it should show and let to edit a combination of both underlaying datasets' parameters.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ModelDteApiAdapter.java
if ( elmtIter != null )
			{
				while ( elmtIter.hasNext( ) )
				{
					DataSetParameterHandle modelParam = ( DataSetParameterHandle ) elmtIter
							.next( );
					dteDataSet.addParameter( newParam( modelParam ) );
					
					
					
					if ( modelParam.isInput( ) )
					{
						String defaultValueExpr = null;
						if ( modelParam instanceof OdaDataSetParameterHandle
								&& ( (OdaDataSetParameterHandle) modelParam ).getParamName( ) != null )
						{
							defaultValueExpr = "params"
									+ "[\""
									+ ( (OdaDataSetParameterHandle) modelParam ).getParamName( )
									+ "\"]";
						}
						else
							defaultValueExpr = modelParam.getDefaultValue( );
						if ( defaultValueExpr != null )
							paramBindingCandidates.put( modelParam.getName( ),
									defaultValueExpr );
					}
				}
			}