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
return null;
				}
				IBaseQueryDefinition query = (IBaseQueryDefinition) dataQuery;
				if ( filterExpressions != null )
				{
					query = cloneQuery( query );
					
					for ( int i = 0; i < filterExpressions.length; i++ )
					{
						query.getFilters( ).add( filterExpressions[i] );
					}
				}
				while ( iid != null )
				{
					DataID dataId = iid.getDataID( );
					if ( dataId != null )
					{
						DataSetID dataSetId = dataId.getDataSetID( );
						long rowId = dataId.getRowID( );
						IResultIterator dataIter = executeSubQuery( dataSetId,
								rowId, (ISubqueryDefinition) query );
						IResultMetaData metaData = getMetaDateByInstanceID( instanceId );
						if ( dataIter != null && metaData != null )
						{
							return new ExtractionResults( dataIter, metaData,
									this.selectedColumns );
						}
						return null;
					}