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/executor/transform/IExpressionProcessor.java
public void calculate( ) throws DataException;
	/**
	 * Calculate the aggregation list on group.The aggragate type may be
	 * FILTER_ON_GROUP or SORT_ON_GROUP. groupLevel array contains every
	 * aggragate group level.It can be referred to the aggregate's rationality
	 * and calculation.
	 * 
	 */
	public void calculate( Object[] aggrList, int[] groupLevel, int type )
			throws DataException;
	/**
	 * whether the expression list contains aggregate, if yes, return true. else
	 * return false
	 * 
	 * @param list
	 * @return
	 */
	public boolean hasAggregateExpr( List list ) throws DataException;
	
	/**
	 * whether the expression list contains aggregate, if yes, return true. else
	 * return false
	 * 
	 * @param IBaseExpression
	 * @return
	 */
	public boolean hasAggregation(IBaseExpression expression) throws DataException;
	/**
	 * Set the result iterator against which the value of aggregations will be
	 * calculated.