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
throw new DataException(ResourceConstants.DEFAULT_INPUT_PARAMETER_VALUE_CANNOT_BE_NULL);
		return evaluateResult;
	}
	
	/**
	 * Converts a parameter value to a String expected by ParameterHint
	 */
	private String getParameterValueString( Class paramType, Object paramValue )
		throws DataException
	{
		if ( paramValue instanceof String )
			return (String) paramValue;
		
	    
	    
	    
	    
	    
	    
		try
		{
			paramValue = DataTypeUtil.convert( paramValue, paramType );
			return DataTypeUtil.toString( paramValue );
		}
		catch ( BirtException e )
		{
			throw new DataException( ResourceConstants.DATATYPEUTIL_ERROR,
					e );
		}
	}