Bug 202038 errors occurred when preview the attached design file.
data/org.eclipse.birt.data.tests/test/org/eclipse/birt/data/engine/binding/FeaturesTest.java
IPreparedQuery preparedQuery = dataEngine.prepare( queryDefn );
		IQueryResults queryResults = preparedQuery.execute( null );
		IResultIterator resultIt = queryResults.getResultIterator( );
		assertTrue( resultIt.next( ) );
		resultIt.getValue( bindingNameRow[0] );
		resultIt.getValue( bindingNameRow[1] );
	}
	
	
	/**
	 * Test aggregation with similar features.
	 */
	public void test11( ) throws Exception
	{
		String[] bindingNameGroup = new String[2];
		bindingNameGroup[0] = "GROUP_COUNTRY";
		bindingNameGroup[1] = "GROUP_CITY";
		IBaseExpression[] bindingExprGroup = new IBaseExpression[2];
		bindingExprGroup[0] = new ScriptExpression( "dataSetRow.COUNTRY" );
		bindingExprGroup[1] = new ScriptExpression( "dataSetRow.CITY" );		
		GroupDefinition[] groupDefn = new GroupDefinition[]{new GroupDefinition( "group0"),
				new GroupDefinition("group1" )};
		groupDefn[0].setKeyExpression( "row.GROUP_COUNTRY" );
		groupDefn[1].setKeyExpression( "row.GROUP_CITY" );
		String[] bindingNameRow = new String[6];		
		bindingNameRow[0] = "ROW_COUNTRY";
		bindingNameRow[1] = "ROW_CITY";
		bindingNameRow[2] = "ROW_SALE_DATE";
		bindingNameRow[3] = "ROW_AMOUNT";