Bug 187445 The joint result of script computed column is incorrect[07]
Description: 1, Each dataset including a computed column: name: index; type:integer; expression:0 2, Specify the script of datasets to: beforeOpen: index=0; onFetch: row["index"] = index; index++; 3, Join the two datasets Build number: 2.2.0.v20070516-0630 Steps to reproduce: 1, open the attached report design 2, open the joint dataset and preview Actual result: The result of column Data "Set1::index" is all 0 but no value 1.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ComputedColumnHelper.java
{
	private ComputedColumnHelperInstance dataSetInstance;
	private ComputedColumnHelperInstance resultSetInstance;
	private ComputedColumnHelperInstance availableModeInstance;
	private int 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,