SET ROLE. Purpose. Use the SET ROLE statement to enable and disable roles for your current session. You cannot enable more than 148 user-defined roles at one time.
Causes. Most cases of osteomyelitis are caused by staphylococcus bacteria, types of germs commonly found on the skin or in the nose of even healthy individuals.Germs can enter a bone in a variety of ways, including: 1  The bloodstream.auses. Most cases of osteomyelitis are caused by staphylococcus bacteria, types of germs commonly found on the skin or in the nose of even healthy individuals.
Osteomyelitis means infection of the bone or bone marrow; inflammation of the bone due to infection. Osteomyelitis sometimes occurs as a complication of injury or surgery. In some cases, the infection may get into bone tissue from the bloodstream.