Bug 137464 apply a filter on a Join dataset in chart editor's select data page, the data preview part is not refresh
Description: use the attach file.When apply a filter on a Join dataaset in chart editor's select data page, the data preview part is not refresh. Step to reproduce: 1. open the attach file 2. creat a chart and choose select data page 3. use the Jiondataset and set the X Y series 4. chilck a filter with row["Data Set1::EMPLOYEEID"] =1 Actual result: look at the data preview after you apply the filter,you will find it haven't change any more but the filter has effect Ecepted result: the data preview should refresh after set a filter
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedJointDataSourceQuery.java
Map appContext ) throws DataException
	{
		super( dataEngine, queryDefn, dataSetDesign, appContext );
		this.dataEngine = dataEngine;
		this.dataSetDesign = dataSetDesign;
		this.appContext = appContext;
	}
	
	/**
	 * Initialize the instance.
	 * 
	 * @param dataEngine
	 * @param dataSetDesign
	 * @param appContext
	 * @throws DataException
	 */
	private void initialize( DataEngineImpl dataEngine, Map appContext )
			throws DataException
	{
		int savedCacheOption = DataSetCacheManager.getInstance( ).suspendCache( );
		ResultIterator left = getSortedResultIterator( dataEngine,
				dataSet.getLeftDataSetDesignName( ),
				appContext,
				dataSet.getJoinConditions( ),
				true );
		ResultIterator right = getSortedResultIterator( dataEngine,
				dataSet.getRightDataSetDesignName( ),
				appContext,
				dataSet.getJoinConditions( ),
				false );