Bug 132515 Expression like "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" is return an error
Description: Add an expression like "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" is return an error.The nesting "Toltal" seem not to be work. Step to reproduce: 1.new a datasource and dataset 2.drag the dataset to layout veiw for a table 3.set a group on the table 4.Insert a data into the group header with the expression e.g. "Toltal.rank(Tolta.ave(row[a]),ture,Null,1)" Actual result: An error was thrown out Expected result: It should work correctly in order to support some requirments
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/expression/ExpressionProcessor.java
{
					IConditionalExpression condition = (IConditionalExpression) baseExpression;
					
					operator = condition.getExpression( );
					if ( operator != null )
					{
						expression = operator.getText( );
						operator.setHandle( parser.compileFilterExpression( expression ) );
					}
					operator = condition.getOperand1( );
					if ( operator != null )
					{
						expression = operator.getText( );
						operator.setHandle( parser.compileFilterExpression( expression ) );
					}
					operator = condition.getOperand2( );
					if ( operator != null )
					{
						expression = operator.getText( );
						operator.setHandle( parser.compileFilterExpression( expression ) );
					}
				}
				else if ( baseExpression instanceof IScriptExpression )
				{
					operator = (IScriptExpression) baseExpression;
					if ( baseExpression != null && operator != null )
					{
						expression = operator.getText( );
						baseExpression.setHandle( parser.compileFilterExpression( expression ) );
					}