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 ( outerResults != null )
		{
			try
			{
				evaluateScope = outerResults.getQueryScope( );
				evaluateResult = outerResults.getExecutorHelper( )
						.evaluate( iParamBind.getExpr( ) );
			}
			catch (BirtException e)
			{
				
				DataException dataEx= new DataException( ResourceConstants.UNEXPECTED_ERROR, e );
				logger.logp( Level.FINE,
						PreparedOdaDSQuery.class.getName( ),
						"getMergedParameters",
						"Error occurs in IQueryResults.getResultIterator()",
						e );
				throw dataEx;
			}
		}
		
		if (evaluateResult == null)
			evaluateResult = ScriptEvalUtil.evalExpr( iParamBind.getExpr( ),
					cx,
					evaluateScope,
					"ParamBinding(" + iParamBind.getName( ) + ")",
					0 );
					
		if ( evaluateResult == null)