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
}
				else
				{
					
					throw new DataException( ResourceConstants.INVALID_EXPRESSION_IN_FILTER );
				}
			}
			catch ( DataException e )
			{
				DataException dataException = new DataException( ResourceConstants.INVALID_EXPRESSION_IN_FILTER,
						e,
						new Object[]{
							expression
						} );
				assert operator != null;
				operator.setHandle( new InvalidExpression( dataException ) );
			}
		}
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.data.engine.executor.IExpressionProcessor#hasAggregateExpr(java.util.List)
	 */
	public boolean hasAggregateExpr( List list ) throws DataException
	{
		boolean hasAggregate = false;
		helper.setAggregateStatus( hasAggregate );