FOR UPDATE has been incorrectly specified for a READ ONLY cursor
|ODBC 2 State
|ODBC 3 State
|Sybase error code
You attempted to declare a cursor FOR UPDATE on a query that is not updatable. Queries that contain DISTINCT, GROUP BY, HAVING,
INTERSECT, EXCEPT, or UNION, or that contain aggregate functions are read-only. If the ansi_update_constraints option is on,
then queries that contain a join are read-only. If the query references a view then the view may be non-updatable.