I'm using MS SQL database.
In one of the tables it has a key column of type varchar(5). Empty Strings are valid values for such a type of column. Let's say the name of this column is Unit.
When I want to access a particular entry through olingo I do something like
/servletDest/MyODataDest.svc/Table2(Charid=3,Chaid=1,Kid=1,Mdt='000',Objid=2,Statnr=0,Symbolid=1,Unit='')
As you can see I pass an empty string for Unit.
It returns me a bad request error (400)
