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/impl/QueryExecutor.java
}
			if ( dataSetFilters.size( )
					+ queryFilters.size( ) + multipassFilters.size( ) > 0 )
			{
				IResultObjectEvent objectEvent = new FilterByRow( dataSetFilters,
						queryFilters,
						multipassFilters,
						dataSet );
				odiQuery.addOnFetchEvent( objectEvent );
			}
			
			odiQuery.setMaxRows( this.baseQueryDefn.getMaxRows( ) );
		}
		finally
		{
			Context.exit( );
		}
	}
	/**
	 * 
	 * @param cx
	 * @throws DataException
	 */
	private void populateGrouping( Context cx ) throws DataException
	{
		List groups = this.baseQueryDefn.getGroups( );
		if ( groups != null && !groups.isEmpty( ) )
		{
			IQuery.GroupSpec[] groupSpecs = new IQuery.GroupSpec[groups.size( )];
			Iterator it = groups.iterator( );