Bug 192332 Engine does not set values for parameters in a data extraction task
Engine does not set values for parameters in a data extraction task. So if a query binds a paramter, we can not get correct data from document.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/DataExtractionTaskV1.java
{
			String rsetName = resultSetName;
			if ( rsetName == null )
			{
				if ( instanceId != null )
				{
					rsetName = instanceId2RsetName( instanceId );
				}
			}
			if ( rsetName != null )
			{
				return extractByResultSetName( rsetName );
			}
			if ( instanceId != null )
			{
				return extractByInstanceID( instanceId );
			}
			return null;
		}
		catch ( BirtException ex )
		{
			throw new EngineException( ex.getLocalizedMessage( ), ex );
		}
	}
	/*
	 * export result directly from result set name
	 */
	private IExtractionResults extractByResultSetName( String rsetName )
			throws BirtException
	{