Bug 208718 Exception is thrown out when exported data with column's data type [0002]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
String colName = result.getResultMetaData( )
									.getColumnName( i );
							String colType = result.getResultMetaData( )
									.getColumnTypeName( i );
							types.put( colName, colType );
						}
						buf.append( (String) types.get( columnNames[0] ) );
						for ( int i = 1; i < columnNames.length; i++ )
						{
							buf.append( sep );
							buf.append( (String) types.get( columnNames[i] ) );
						}
						buf.append( '\n' );
						outputStream.write( buf.toString( ).getBytes( ) );
						buf.delete( 0, buf.length( ) );
					}
					
					while ( iData.next( ) )
					{
						String value = null;
						try
						{
							value = csvConvertor( DataTypeUtil.toString( iData
									.getValue( columnNames[0] ) ), sep );
						}
						catch ( Exception e )
						{
							
						}
						if ( value != null )