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
}
		catch( EngineException e )
		{
			e.printStackTrace( );
		}
		assert mapQueryIDToResultSetName != null;
		
		if (mapDispNameToResultSetName == null)
		{
			mapDispNameToResultSetName = new HashMap();
		}
		else
		{
			mapDispNameToResultSetName.clear( );
		}
		
		
		if( this.mapQueryToDispName == null )
		{
			this.mapQueryToDispName = new HashMap( );
		}
		else
		{
			this.mapQueryToDispName.clear( );
		}
		
		
		if( this.mapResultSetNameToQuery == null )
		{
			this.mapResultSetNameToQuery  = new HashMap( );