Bug 138828 Export data column are disordered
Steps to reproduce: 1.Add a sample data source and a data set with table "CUSTOMERS" 2.Preview in Web Viewer 3.Click "Export data", choose columns "CUSTOMERNAME","PHONE","CITY","STATE" to be exported, click "OK" Expected result: The exported columns is alphabetic order or the same order as selected columns Actual result: The exported columns is disordered. they are "STATE","CITY","CUSTOMERNAME","PHONE".
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/BirtViewerReportService.java
String objectId, InputOptions renderOptions, List activeIds )
			throws ReportServiceException
	{
		
		
		
		return getPageByObjectId( docName, objectId, renderOptions, activeIds );
	}
	public void renderReport( String docName, String pageRange,
			InputOptions renderOptions, OutputStream out )
			throws ReportServiceException
	{
		
	}
	public void extractResultSet( String docName, String resultSetId,
			Set columns, Set filters, InputOptions options, OutputStream out )
			throws ReportServiceException
	{
		IReportDocument doc = ReportEngineService.getInstance( )
				.openReportDocument( getReportDesignName( options ), docName );
		Locale locale = (Locale) options.getOption( InputOptions.OPT_LOCALE );
		
		try
		{
			ReportEngineService.getInstance( ).extractData( doc, resultSetId,
					columns, locale, out );
			doc.close( );
		}
		catch ( RemoteException e )
		{