LINQ2Entities and Oracle: comparing on a String/nclob

I have an Entity called Product in Entity Framework which has a name field, which is of type String. This gets transformed to a NCLOB column in Oracle, by the Oracle Software I installed for Visual Studio. I am able to insert a few Products.

Now I want to do for example a LINQ-query where I select a single Entity based on its name:

Product p1 = ctx.ProductSet.Single(p => p.Name == "FIETS");

This results in an exceptio开发者_如何学Gon which tells me that error ORA-00932 (inconsistent datatypes). What can I do to resolve this?

You should harass Oracle about it. This should work. As long as it doesn't, their Entity Provider is broken.

Apart from this showing how broken their EDM support is:
Is it really required to have a name field of type nclob? Wouldn't a nvarchar be sufficient?