[dotNetRDF-bugs] Bugs, problems, ideas

[Alexander S. <ale...@gm...>]

Hello!

1. VirtuosoManager.LoadNode method doesn't work correctly with queries that
contain OPTIONAL clause. Such queries return DbNull for result sets at which
optional variables are not set. I have just added one more "else if" and it
works nice:
            else if (n is DBNull)
            {
                temp = null;
            }
2. Why not to split UpdateGraph method to AddToGraph and RemoveFromGraph
methods? I think it would be more convenient for most usecases.

3. Method UpdateGraph (at least in VirtuosoManager) throws exception when
removals variable is null. That's why I have to pass empty list to make my
addition-only UpdateGraph call work. I think it would be nice to make this
query work with additions or/and removals equal to null.

4. Why does method UpdateGraph has List<Triple> but not IEnumerable<Triple>
parameters? It is inconvenient, for example, when I would like to save
graph's triples:

            Graph graph = new Graph();
            RdfXmlParser parser = new RdfXmlParser();
            parser.Load(graph, fileName);

            this._virtuosoManager.UpdateGraph(graphUri, *
graph.Triples.ToList()*, new List<VDS.RDF.Triple>());

I have to create the list and it makes my code less efficient (imagine big
graph).

5. VirtuosoManager.Query method contains the following code:

                else if (results.Rows.Count == 1 && results.Columns.Count ==
1)
                {
                    //Single Row and Column implies ASK/DESCRIBE/CONSTRUCT
results

I have some SELECT-queries that return one variable and sometimes one
result. And because of the previous code my results are lost (because I
expect my variable, but not variable called Result. I think it would be nice
to make simple check (just search ask, describe or construct words in the
query) to determine is this SELECT-query or not.

6. Is there any way to get dotnetRDF library (*only library*) without any
GPL dependencies under BSD or similar license?

That's all for today :)

Regards,
Alexander