A special call is provided to enable a filing system to clear select lists. The major function of a CLEARSELECT is to clear the system variables (such as the system list variable) used to indicate an active select list.
The call is passed through to the filing system, however, in case the filing system needs to take action when a select list condition is cleared. For example, Linear Hash (RTP57) uses a CLEARSELECT call as an indication that it can reset its sizelock parameter by decrementing it.
