Bug 208168 Meaningless exception occurs when sorting condition refer to a unused binding[07]
Description: Meaningless exception occurs when sorting condition refer to a unused binding[07] Build number: 2.3.0.v2007-0800 Steps to reproduce: 1, New a table binding with a dataset 2, Define a Sort for the table 3, Delete the binding of table which is using by sorting condition 4, Preview Expected result: The exception should be meaningful. Actual result: Exception is meaningless for user to clear the mistake point Error log: An error happen during population of data. This might be caused by including data of mixed type in a column of "ANY" type
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ComputedColumnHelper.java
{
	private ComputedColumnHelperInstance dataSetInstance;
	private ComputedColumnHelperInstance resultSetInstance;
	private ComputedColumnHelperInstance availableModeInstance;
	private ComputedColumnHelperInstance currentModel;
	private List allCC;
	private static Logger logger = Logger.getLogger( ComputedColumnHelper.class.getName( ) );
	
	/**
	 * 
	 * @param dataSet
	 * @param dataSetCCList
	 * @param resultSetCCList
	 * @throws  
	 */
	ComputedColumnHelper( DataSetRuntime dataSet, List dataSetCCList,
			List resultSetCCList ) throws DataException
	{
		Object[] params = { dataSet, dataSetCCList, resultSetCCList };
		logger.entering( ComputedColumnHelper.class.getName( ),
				"ComputedColumnHelper",
				params );
		
		this.dataSetInstance = new ComputedColumnHelperInstance( dataSet,
				dataSetCCList );
		this.resultSetInstance = new ComputedColumnHelperInstance( dataSet,
				resultSetCCList );
		List availableCCList = new ArrayList( );
		getAvailableComputedList( getComputedNameList( dataSetCCList ),