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
elmtIter = modelDataSet.columnHintsIterator( );
		if ( elmtIter != null )
		{
			List columnDefns = dteDataSet.getResultSetHints( );
			while ( elmtIter.hasNext( ) )
			{
				ColumnHintHandle modelColumnHint = ( ColumnHintHandle ) elmtIter
						.next( );
				ColumnDefinition existDefn = findColumnDefn( columnDefns,
						modelColumnHint.getColumnName( ) );
				if ( existDefn != null )
					updateColumnDefn( existDefn, modelColumnHint );
				else
					dteDataSet
							.addResultSetHint( newColumnDefn( modelColumnHint ) );
			}
		}
	}
	/**
	 * Creates a new DtE API IParameterDefinition from a model's
	 * DataSetParameterHandle.
	 */
	IParameterDefinition newParam( DataSetParameterHandle modelParam )
	{
		ParameterDefinition dteParam = new ParameterDefinition( );
		dteParam.setName( modelParam.getName( ) );
		if ( modelParam.getPosition( ) != null )
			dteParam.setPosition( modelParam.getPosition( ).intValue( ) );
		if( modelParam.getNativeDataType( ) != null )
			dteParam.setNativeType( modelParam.getNativeDataType( ).intValue( ) );