class PgConn::SessionMethods

def terminate(database, *users)


multiple sessions (is this ever relevant?)
TODO: Make is possible to terminate a single session of a user with

argument defaults to an empty list
nil. Note that 'terminate(database)' is a nop because the absent users
Terminate sessions in the database of the given users or of all users if 
def terminate(database, *users)
  users = Array(users).flatten
  !database.nil? or raise ArgumentError
  enabled = self.enabled?(database)
  case users
    when [];
      return
    when [nil]
      self.disable(database) if enabled
      users = self.list(database)
    else
      users = Array(users).flatten
  end
  pids = self.pids(database, users)
  if !pids.empty?
    pids_sql = pids.map { |pid| "(#{pid})" }.join(", ")
    conn.execute "select pg_terminate_backend(pid) from ( values #{pids_sql} ) as x(pid)"
  end
  self.enable(database) if self.enabled?(database) != enabled
end