Alter Table Syntax Error - Anyone Sees The Error?

Hello,





the following alter table statement:





ALTER TABLE [dbo].[CalCalendar]


ALTER COLUMN [OID] uniqueidentifier NOT NULL PRIMARY KEY NONCLUSTERED





is answered with:





Server: Msg 156, Level 15, State 1, Line 2


Incorrect syntax near the keyword 'PRIMARY'.





which I consider to be interesting. Anyone has an idea why? I checked documentation but I do not see an error.





Note that:





ALTER TABLE [dbo].[CalCalendar]


ALTER COLUMN [OID] uniqueidentifier NOT NULL





DOES get executed, and





ALTER TABLE [dbo].[CalCalendar]


ALTER COLUMN [OID] uniqueidentifier NOT NULL PRIMARY KEY





produces the same error.





Now, in my understanding this has nothing to do with an index may already exist etc. - the eror indicates a SYNTAX error, before any checking. Makes no sense to me, though, reading the documentation.





So - anyone an idea?