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
iid = iid.getParentID( );
				}
				return null;
			}
			iid = iid.getParentID( );
		}
		return null;
	}
	private IResultMetaData getMetaDateByInstanceID( InstanceID iid )
	{
		while ( iid != null )
		{
			long id = iid.getComponentID( );
			ReportItemDesign design = (ReportItemDesign) report
					.getReportItemByID( id );
			IDataQueryDefinition query = design.getQuery( );
			if ( query != null )
			{
				HashMap query2ResultMetaData = report.getResultMetaData( );
				if ( null != query2ResultMetaData )
				{
					return (ResultMetaData) query2ResultMetaData.get( query );
				}
				return null;
			}
			iid = iid.getParentID( );
		}
		return null;
	}
	private IResultIterator executeQuery( String rset, QueryDefinition query )