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/DataExtractionTask.java
return null;
		
		QueryDefinition newQuery = new QueryDefinition( (BaseQueryDefinition) query.getParentQuery( ) );
		
		newQuery.getSorts( ).addAll( query.getSorts( ) );
		newQuery.getFilters( ).addAll( query.getFilters( ) );
		newQuery.getSubqueries( ).addAll( query.getSubqueries( ) );
		newQuery.getResultSetExpressions( ).putAll( query.getResultSetExpressions( ) );
		
		newQuery.getGroups( ).addAll( query.getGroups( ) );
		newQuery.setUsesDetails( query.usesDetails( ) );
		newQuery.setMaxRows( query.getMaxRows( ) );
		
		newQuery.setDataSetName( query.getDataSetName( ) );
		newQuery.setAutoBinding( query.needAutoBinding( ) );
		newQuery.setColumnProjection( query.getColumnProjection( ) );
		
		return newQuery;
	}
	/**
	 * @param simpleFilterExpression
	 *            add one filter condition to the extraction. Only simple filter
	 *            expressions are supported for now, i.e., LHS must be a column
	 *            name, only <, >, = and startWith is supported.
	 */
	public void setFilters( IFilterDefinition[] simpleFilterExpression )
	{
		filterExpressions = simpleFilterExpression;
	}
}