Bug 182680 Use feature of new Aggregation framework of Data Engine.
DataEngine will implement new aggregation framework in 2.2.0RC0. After the implementation is finished Engine should go ahead to use new column bindings in definition of map/highlight.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/GetParameterDefinitionTask.java
{
							checkPool.put( value, value );
							choices.add( new SelectionChoice( label, value ) );
							count++;
						}
					}
					else
					{
						choices.add( new SelectionChoice( label, value ) );
						count++;
					}
					if ( ( limit != 0 ) && ( count >= limit ) )
					{
						break;
					}
				}
			}
			catch ( BirtException ex )
			{
				ex.printStackTrace( );
			}
		}
		if ( !fixedOrder )
			Collections.sort( choices, new SelectionChoiceComparator(
					sortByLabel, pattern, sortDirectionValue, ULocale
							.forLocale( locale ) ) );
		return choices;
	}
	/**
	 * The first step to work with the cascading parameters. Create the query