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
*/
	private void preComputedColumn( ) throws BirtException
	{
		this.preBasic( );
	}
	
	/**
	 * @return row expression array
	 */
	private IBaseExpression[] getRowExpr( )
	{
		
		int num = 4;
		IBaseExpression[] rowBeArray = new IBaseExpression[num];
		rowBeArray[0] = new ScriptExpression( "dataSetRow.COUNTRY" );
		rowBeArray[1] = new ScriptExpression( "dataSetRow.CITY" );
		rowBeArray[2] = new ScriptExpression( "dataSetRow.SALE_DATE" );
		rowBeArray[3] = new ScriptExpression( "dataSetRow.AMOUNT" );
		return rowBeArray;
	}
	/**
	 * @return row expression array
	 */
	private String[] getRowExprName( )
	{
		
		int num = 4;
		String[] rowBeArray = new String[num];
		rowBeArray[0] = "COUNTRY";
		rowBeArray[1] = "CITY";