Bug 123219 Export data in attached file which has a table covers multiple page will throw exception.
Description: Export data in attached file which has a table covers multiple page will throw exception. Steps to reproduce: 1. Preview attached design file in viewer. 2. Select the table and click Export Data Expected result: No errors. Actual result: Exception Exception in: ReportEngineService.getMetaData( )
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/DataExtractionTask.java
protected String[] selectedColumns;
	
	protected Report report;
	
	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;
	
	/*