In 9.0.2 our client used two database queries on a scheduled basis identifying documents checked out or locked open (but not checked out).
They used this to automatically email users and remind them of open files or checked out documents. These queries accessed the ENTRY_LOCK table in the LF database in 9.0.2. After the upgrade to 9.2, that table no longer exists. It appears that information on checked out documents is now available in PLOCK, but I cannot identify where open document information is stored.