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
for ( int i = 0; i < this.baseQueryDefn.getFilters( ).size( ); i++ )
				{
					queryFilters.add( this.baseQueryDefn.getFilters( ).get( i ) );
				}
			}
			
			List multipassFilters = prepareFilters( cx,
					dataSetFilters,
					queryFilters,
					temporaryComputedColumns );
					    
			List computedColumns = null;
			
			computedColumns = this.dataSet.getComputedColumns( );
			if ( computedColumns == null )
				computedColumns = new ArrayList( );
			if ( computedColumns.size( ) > 0
					|| temporaryComputedColumns.size( ) > 0 )
			{
				IResultObjectEvent objectEvent = new ComputedColumnHelper( this.dataSet,
						computedColumns,
						temporaryComputedColumns );
				odiQuery.addOnFetchEvent( objectEvent );
				this.dataSet.getComputedColumns( )
						.addAll( temporaryComputedColumns );
			}
			if ( dataSet.getEventHandler( ) != null )
			{
				OnFetchScriptHelper event = new OnFetchScriptHelper( dataSet );
				odiQuery.addOnFetchEvent( event );