How to create an Entity structure built into a function to convert an Sql server

Question

As described on the Dixin Blog

I am trying to create this inline function:

public static class BuiltInFunctions
{
    [Function(FunctionType.BuiltInFunction, "CONVERT")]
    public static string ConvertToInt(this string type, string value) => Function.CallNotSupported<string>();
}

And I use it like:

Query().Where(x => "int".ConvertToInt(x.MyNVarcharColumn) ...

But the generated SQL looks like this:

SELECT [columns] FROM [table] WHERE (CONVERT(N'int', 'ValueOfMyNVarcharColumn')) ...

When something like

SELECT [columns] FROM [table] WHERE (CONVERT(int, MyNVarcharColumn)) ...

or

SELECT [columns] FROM [table] WHERE (CONVERT(int, 'ValueOfMyNVarcharColumn')) ...

What can I do to get the expected result?

Important here is how to generate typename parameters for native SQL functions.