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
assert this instanceof PreparedOdaDSQuery.OdaDSQueryExecutor ||
		       this instanceof PreparedScriptDSQuery.ScriptDSQueryExecutor;
		
		List paramDefns = getDataSet().getParameters();
		int nParams = paramDefns == null? 0 : paramDefns.size();
		
		
		ParameterHint[] paramHints = new ParameterHint[nParams];
		
		boolean[] bindingResolved = new boolean[nParams];
		
		 
		for ( int i = 0; i < nParams; i++ )
		{
			IParameterDefinition paramDefn = (IParameterDefinition) paramDefns.get(i);
			paramHints[i] = createParameterHint( 
					paramDefn , paramDefn.getDefaultInputValue() );
			bindingResolved[i] = false;
			
			
			 
			if ( paramDefn.isInputMode() && paramDefn.getName() != null )
			{
				Object paramValue = DataSetRuntime.UNSET_VALUE;
				try
				{
					paramValue =  getDataSet().getInputParameterValue( paramDefn.getName() );
				}
				catch (BirtException e)