Bug 123576 Data can't be retrieved when exporting data
Description: Data can't be retrieved when exporting data Steps to reproduce: 1.Preview the attached file in Web Viewer 2.Exported the data in table Expected result: The data is exported as a CSV file Actual result: No data is retrieved
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/DataExtractionTask.java
protected List resultMetaList;
	
	protected IExtractionResults currentResult = null;
	
	/*
	 * map query id to result set name stored in DtE
	 */
	protected HashMap mapQueryIDToResultSetName;
	
	/*
	 * current result set name
	 */
	protected String resultSetName;
	/*
	 * map IBaseQueryDefinition to ReportItemDesign, namely TableItemDesign, ListItemDesign
	 * and ExtendedItemDesign
	 */
	protected HashMap mapQueryToReportItem;
	
	/*
	 * map result set display name to result set name stored by DtE.
	 */
	protected HashMap mapDispNameToResultSetName;
	
	/*
	 * have the metadata be prepared
	 */
	protected boolean isMetaDataPrepared = false;