Bug 147977 Chart editor does not use container's column bindings
1) create data source 2) create data set: select * from customers 3) create table 4) bind country, customer name to table 5) group by country 6) create a binding for total_by_country which aggregates # of customers in each country. put a data element in group footer and bind to total_by_country 7) in group header put chart 8) in data tab specify inherit from container Result: You see columns for report data set created in step 2. Expected Result: Just 3 columns for the 3 bindings created in 4 and 6.
data/org.eclipse.birt.data.tests/test/org/eclipse/birt/data/engine/impl/rd/ReportDocumentTest.java
* @throws BirtException
	 */
	private void genComputedColumn( ) throws BirtException
	{
		String[] ccName = new String[]{
				"cc1", "cc2"
		};
		String[] ccExpr = new String[]{
				"row.COUNTRY", "row.AMOUNT*100"
		};
		int[] dataTypes = new int[]{
				DataType.STRING_TYPE, DataType.INTEGER_TYPE
		};
		for ( int i = 0; i < 2; i++ )
		{
			ComputedColumn computedColumn = new ComputedColumn( ccName[i],
					ccExpr[i],
					dataTypes[i] );
			( (BaseDataSetDesign) this.dataSet ).addComputedColumn( computedColumn );
		}
		
		QueryDefinition qd = newReportQuery( );
		
		IBaseExpression[] tempArray = getRowExpr( );
		int length = tempArray.length;
		IBaseExpression[] rowBeArray = new IBaseExpression[length + 2];
		System.arraycopy( tempArray, 0, rowBeArray, 0, length );
		for ( int i = 0; i < ccName.length; i++ )
			rowBeArray[length + i] = new ScriptExpression( "dataSetRow." + ccName[i] );